Materials & Welding

[MW:13725] For expiration of welders for WPQ

2012-02-17T17:29:00.000+05:30

Dear Experts,

I have confusion about validity for the welder qualification.

As per ASME Sec-IX, QW-322, When welder has not welded withe process
during the period of 6 months or more his qualification for that
process shall expire unless within 6 months period prior to his
expiration of qualification.

i have doubt that if welder is doing welding for particular process
since 1 yr under my supervision, the will i need some renewal?

shall the welder expired or not within 6 months period if he is doing
welding for particular process:

Kindly justify this clause

Regards,

Ankit Khatri

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Re: [MW:13724] Re: What is meant by MGAL

2012-02-17T15:47:00.000+05:30

Hi Nav,
Please explain how it is connected to:
Flat bars of 60 x 40mm size with material specification S355 J2?
This spinel you are referring to is a gemstone........?
Please throw some more light on the issue.....
Shashank

--- On Thu, 9/2/12, Nav <navaqc@gmail.com> wrote:

From: Nav <navaqc@gmail.com>
Subject: [MW:13647] Re: What is meant by MGAL
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Thursday, 9 February, 2012, 5:48 PM

Hi Prohit

+MGAL is a Megnesium-Aluminium Transparent spinel. Its a new
technology.

regards
NAV

On Feb 8, 6:37 am, Chaitanya Purohit <chaitanya_puro...@yahoo.co.in>
wrote:
> Dear All,
>
> We have procured Flat bars of 60 x 40mm size with material specification
> S355 J2
>
> In the MTC, material specification is S355 J2 + MGAL as per EN10025-2:2004
>
> Can somebody, please clarify the meaning of 'MGAL' mentioned in MTC along
> with Material spec / Grade
>
> C. K. Purohit
> +968 92840112

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RE: [MW:13718] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-17T09:32:00.000+05:30

Hi Rinshad,

Alloy 625 and alloy 825 have different chemistries. 625 contains more Nickel (typically 58% min) as compared to 38-46% Ni for alloy 825. 625 welding consumable would always be overmatching for alloy 825.Unless there's any restriction for client or from any design specification, 625 strips may be used for ESSC on 825 clad. You need to clarify this issue with client and then proceed.

The beauty with ESSC is that the dilution level is much less,typically 50% of SAWSC. Hence one may not loose alloying elements through dilution. Typically one may achieve consistent 825 or 625 welding chemistry(depending on the filler metal used) on the entire thickness of the deposit.

Matching 825 ESSC strip cladding consumables (strip+flux combinations) are manufactured by some manufacturers.See the attachment from Soudometal and Metrode. While 625products are available universally, because this alloy is very common in any offshore services.

My advice would be :-

Check with the consumable supplier on the availability of 825 welding consumables. This may be less expensive. Check for the reliability of this product to meet all the mechanical and corrosion test results.
Should meeting the above is difficult with 825 alloy consumables, the next option would be to select alloy 625 products.

Hope this would be of help.

Appreciating your feedback.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

Alloy-625

Alloy-825

From: rinshad abdul rahman [mailto:rinshad043@gmail.com]
Sent: Thursday, February 16, 2012 2:51 AM
To: pgoswami
Subject: Re: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

Dear Mr.Pradeep,

It should specified by Mr.Budi ,i am still in the starting stage in the welding related things, i feel it is good to study the application environment and to develop the testing requirement for the same.If the environment is not too harsh for Ni alloys like sea water and all we can use overlay with inconel 625 even if the Fe dilution is more. Is it anything wrong in this ?

Budi,Can you please tell us the actual application environment for this inconel weld overlay,so that it might helpful to determine the acceptability of the chemical composition.

Rinshad

On Thu, Feb 16, 2012 at 7:56 AM, pgoswami <pgoswami@quickclic.net> wrote:

Hi Rinshad,

What're the technical requirements?

Appreciate your feedback.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of rinshad abdul rahman
Sent: Wednesday, February 15, 2012 12:04 AM
To: materials-welding@googlegroups.com

Subject: Re: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

Dear Mr.Pradip,

Is anything wrong in accepting more diluted weld deposition with the consideration of application ?

For example if our weld metal chemistry is meeting the requirement of Inconel 825 (weld overlay with Inconel 625) which satisfy the application condition without any failure.

Is there any test to confirm this ?

Rinshad

On Wed, Feb 15, 2012 at 7:23 AM, pgoswami <pgoswami@quickclic.net> wrote:

Hi Budi,

The weld deposit should meet C.A requirements of AWS/ASME SFA 5.14(see below). If I could re-collect from the past experiences, meeting C.A in single pass ESSC could be a problem(see the attachment).Fe dilution is always a problem in the first pass.It would be a good point to discuss the issue with the consumable supplier prior hand and resort to multipasses, if there're severe restrictions on Fe dilution in 625 overlay.

See the link for the soudometal product catalogue for SAWSC and ESSSC.The attachment is a page extracted from this document.

What is the design code? By any chance does the C.A of the deposit has to conform to API Spec, 5LD??

Appreciate your feedback.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

http://www.btwbr.com.br/images/ingsoudokay.pdf

Nb

(Cb)

Other

AWS Classification
m
UNS Number

C

Mn

Fe

P

S

Si

Cu

Ni
d
Co

Al

Ti

Cr

plus

Ta

Mo

V

W

Elements,

Total

On Tue, Feb 14, 2012 at 7:10 PM, <budi.witjaksono@profab-group.com> wrote:

Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,

Budi Witjaksono

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Thanks and Regards................?

Rinshad abdul rahiman

Q.C.E

OCEAN RUBBER FACTORY L.L.C-ENGG.DIV

Al-ghail industrial park,Ras al khaima

Tel: +971507103778

qc2@oceanrubber.com

Re: [MW:13717] Information on Subsea Welding

2012-02-17T07:44:00.000+05:30

Aker Subsea division had all along been using Fronius cladding system to clad most of their jobs with Inconel 625 CRA materials. Depending on the part, standard cladding rig are being used to clad wellhead, bonnet assembly and adaptor tree body, whereas ETRS cladding rig are being used to clad bigger parts like valve body.

Regards,

Jonathan Tan
Sales Manager
Wilhelm SEA Pte Ltd
8, Tuas West Street,
Singapore 637443

Tel: +65 6863 1676
Fax: +65 6863 1675
H/P: +65 9818 3031
Website: www.wilhelmcladding.com
www.wilhelm-group.com

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From: Vijay.Tayade@akersolutions.com

Sent: Wednesday, February 15, 2012 8:55 PM

To: materials-welding@googlegroups.com

Subject: [MW:13705] Information on Subsea Welding

Hi,

Can anybody share there view on Subsea Equipment Welding utilized for welding of components used in Tie-in-System, Umbilical System, Wellhead, Xmas-Tree etc.

Regards
Vijay

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Fwd: [MW:13723] Interpass timing

2012-02-16T17:22:00.000+05:30

Dear sir,

Interpass means temperature (3" on either side of joint) inbtween two consecutive passes. And in this case if it is left after laying Root & Hotpass all through out the shit/night, then you tell me where is the essence of the word interpass.-Unless otherwise it has ben kept under the preheat you mentioned all through out the break.

As far as my knowledge goes, there is no code reference about this GEP(Good engineering practice). Basically this is a truely a welding-metallurgical aspect and if the joints are so critical, then your QC has right to say so.

Actually what happens: With only two passes laid on this XXS heavy wall thickness parent metal, the weld deposit thickness is not that much to withstand the contractional forces exerted by the parent metal from both side of the joint. Thereby resulting huge stress build up which leads to cracks. In heavy walled plates as well as pipes, longitudinal ( cold cracks / HIC ) on the bead laid yesterday are often seen in this partially welded items.

Way forward: May be at the best if you can put a deviation note and convince yourself as well the QC that it will be 100% NDT done before proceeding further. 100% LPI & 100% MPI on all such partially welded joints. And marking these joints with a distint identification no. and doing 100% RT of all these particular joints after final weld completion., even if the drg says % RT on all finished joints.

regards,

Debasish

Dubai.

+971504349936

On Wed, Feb 15, 2012 at 5:07 PM, jesti fer <jesti_fer@yahoo.com> wrote:

Dear experts,

I need your help, In our project (B.31.3) CS pipe joints ASTM A106 Gr.B 8" Sch XXS, our construction team kept the joints after root pass and hot pass welding, but our QC instructed to cut and and re-weld the joints. Really it is required and it is mentioned any were in code? We are maintaining preheat at 150-Deg and inter pass temp 300-Deg

Please help me;;;;

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Re: [MW:13722] Can we do tack weld by pipe fitters?

2012-02-16T17:14:00.000+05:30

Yes you are rigth we need to follow the indicated standart. Because for example if you check in API 653 it says , 10.4.2.7

Tack welds used in the assembly of vertical joints of tank shells shall be removed and shall not remain in
the finished joint when the joints are welded manually. When such joints are welded by the submerged-arc process,
the tack welds shall be thoroughly cleaned of all welding slag but need not be removed provided that they are sound
and are thoroughly fused into the subsequently applied weld beads. Tack welds shall be made using a fillet-weld or
butt-weld procedure qualified in accordance with Section IX of the ASME Code. Tack welds to be left in place shall be
made by qualified welders.

It says if your tack will not be include in weld metal ,eg. manuel welding method, you can use unqualified welder

2012/2/16 Doni Afrizal <doni.afrizal@gmail.com>

Dear all,

The question is " Can we do tack weld by pipe fitters according to ASME 31.3? "

so, we should go to ASME B31.3.

The Code said on part 328.5.1 (c) Tack welds shall be made by a qualified welder or welding operator.

Regards,

Doni Afrizal

IdWI, ASNT NDT Level 2 (MT,PT,RI)

On Wed, Feb 15, 2012 at 6:19 PM, manpreet <manpreetsin88@rediffmail.com> wrote:

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh

On Wed, 15 Feb 2012 09:04:56 +0530 wrote

>Can we do tack weld by pipe fitters according to ASME 31.3?

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Tuğrulhan ÖZDEMİR

Metalürji & Malzeme Müh. (Y.T.U.)

U.Kaynak Mühendisi (I.W.E.)

[MW:13716] ECA design

2012-02-16T17:13:00.000+05:30

Dear Expert
Now I'm working with pipeline specification (AS 2885.2). I have
submitted WPS to client for approval with out CTOD test but client
said " I have to do CTOD test). because project spec. state ") CTOD
testing shall be performed in accordance with AS 2205.7.3 whenever an
ECA is used to develop weld flaw acceptance criteria or whenever the
base material is CTOD tested.".
My question is
1."How to know that which piping class was designed with ECA and what
project document will show this requirement?' Because I try to find in
many project spec. but I can't see (may be I miss) so why client want
me to do CTOD test.
2. Could you please explain when we have to employ ECA?
3. In project spec. said " when an ECA is employed, the NDT method to
be used shall be AUT. ", why RT can't use?

Please help me by share your experience.
Best Regards
Mr. SOLOMON
QA/QC Engineer

Re: [MW:13721] Interpass timing

2012-02-16T16:54:00.000+05:30

yo Debasish

As far as interpass temp is concerned ....if you speaking of a 75mm
plate ...or more than 50mm.Interpass temp shall be measured on the
weld metal or immidiately adjacent to that heat being focused....allow
2minutes for every 25mm..then you good to go........
Go to your WPS and you will see interpass temp which is given in KJ

ON another note preheat ranges from 50 -250 degrees celcius

Interpass temp is measured in KJ so work out your HI and AE

On Thu, Feb 16, 2012 at 1:37 AM, DEBASISH <debasish.uae@gmail.com> wrote:
> Dear
> Interpass means temperature (3" on either side of joint) inbtween two
> consecutive passes. And in this case if it is left after laying Root &
> Hotpass all through out the shit/night, then you tell me where is the
> essence of the word interpass.-Unless otherwise it has ben kept under the
> preheat you mentioned all through out the break.
>
> As far as my knowledge goes, there is no code reference about this GEP(Good
> engineering practice). Basically this is a truely a welding-metallurgical
> aspect and if the joints are so critical, then your QC has right to say so.
> Actually what happens: With only two passes laid on this XXS heavy wall
> thickness parent metal, the weld deposit thickness is not that much to
> withstand the contractional forces exerted by the parent metal from both
> side of the joint. Thereby resulting huge stress build up which leads to
> cracks. In heavy walled plates as well as pipes, longitudinal ( cold cracks
> / HIC ) on the bead laid yesterday are often seen in this partially welded
> items.
>
> Way forward: May be at the best if you can put a deviation note and convince
> yourself as well the QC that it will be 100% NDT done before proceeding
> further. 100% LPI & 100% MPI on all such partially welded joints. And
> marking these joints with a distint identification no. and doing 100% RT of
> all these particular joints after final weld completion., even if the drg
> says % RT on all finished joints.
>
> regards,
> Debasish
> Dubai.
> +971504349936
>
>
>
> On Wed, Feb 15, 2012 at 5:07 PM, jesti fer <jesti_fer@yahoo.com> wrote:
>>
>> Dear experts,
>> I need your help, In our project (B.31.3) CS pipe joints ASTM A106 Gr.B 8"
>> Sch XXS, our construction team kept the joints after root pass and hot pass
>> welding, but our QC instructed to cut and and re-weld the joints. Really it
>> is required and it is mentioned any were in code? We are maintaining
>> preheat at 150-Deg and inter pass temp 300-Deg
>> Please help me;;;;
>>
>>
>> --
>> To post to this group, send email to materials-welding@googlegroups.com
>> To unsubscribe from this group, send email to
>> materials-welding+unsubscribe@googlegroups.com
>> For more options, visit this group's bolg at
>> http://materials-welding.blogspot.com/
>> The views expressed/exchnaged in this group are members personel views and
>> meant for educational purposes only, Users must take their own decisions
>> w.r.t. applicable code/standard/contract documents.
>
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.

Re: [MW:13720] Re: Ice formation on freon lines at damaged/uninsulated sections

2012-02-16T15:23:00.001+05:30

Hi,

Response to Que 1 & 2:-

For determining thickness of Line/Pipe, 2 factors are added to calculated minimum Thickness i.e
Corrosion Allowance and Mill Tolerance (12.5%), now you can play with Mill tolerance but not
with Corrosion Allowance (CA) as it's a predicted corrosion rate for certain design life.

CA does not account for any of the localized corrosion processes identified, applicable for CUI
as well.

Check affected thickness using NDT, see it is below min. calculated thickness + CA, if yes,
then you have got no option other than scrapping that Piece of Line.

If no then excavate that little portion of corroded line, NDT the excavated area and perform a
weld repair with qualified welding procedure, I don't see any issue related to Brittle fracture

Regards
Manpreet Singh

On Feb 14, 10:34 am, ags 36681 wrote:

> Dear friends,

> In our plant especially in refrigeration unit, so many lines (CS) or

> valves have failed insulation, say maintenance did some work on it and

> then not reinsulated, because of this, ice has formed on all over

> these uninsulated location.

>

> Some of the lines are in intermittent service (means alternate

> equipments are being used based on operation requirements, hence CUI

> is also expected),

>

> below doubts need your support to resolve.

> •How these locations will prone to premature failure. (Other than

> external corrosion).

> •Is there any brittle effect on material?

> •Kindly provide some good references to convince the management

> regarding the impact of this on equipments integrity.

>

> Regards,

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Re: [MW:13714] Re: Ice formation on freon lines at damaged/uninsulated sections

2012-02-16T15:23:00.000+05:30

Follow Rediff Deal ho jaye! to get exciting offers in your city everyday.

Re: [MW:13715] Can we do tack weld by pipe fitters?

2012-02-16T15:22:00.000+05:30

Yes you are rigth we need to follow the indicated standart. Because for example if you check in API 653 it says ,

10.4.2.7

Tack welds used in the assembly of vertical joints of tank shells shall be removed and shall not remain in

the finished joint when the joints are welded manually. When such joints are welded by the submerged-arc process,

the tack welds shall be thoroughly cleaned of all welding slag but need not be removed provided that they are sound

and are thoroughly fused into the subsequently applied weld beads. Tack welds shall be made using a fillet-weld or

butt-weld procedure qualified in accordance with Section IX of the ASME Code. Tack welds to be left in place shall be

made by qualified welders.

It says if your tack will not be include in weld metal ,eg. manuel welding method, you can use unqualified welder

2012/2/16 Doni Afrizal <doni.afrizal@gmail.com>

Dear all,

The question is " Can we do tack weld by pipe fitters according to ASME 31.3? "

so, we should go to ASME B31.3.

The Code said on part 328.5.1 (c) Tack welds shall be made by a qualified welder or welding operator.

Regards,

Doni Afrizal

IdWI, ASNT NDT Level 2 (MT,PT,RI)

On Wed, Feb 15, 2012 at 6:19 PM, manpreet <manpreetsin88@rediffmail.com> wrote:

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh

On Wed, 15 Feb 2012 09:04:56 +0530 wrote

>Can we do tack weld by pipe fitters according to ASME 31.3?

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Tuğrulhan ÖZDEMİR

Metalürji & Malzeme Müh. (Y.T.U.)

U.Kaynak Mühendisi (I.W.E.)

Re: [MW:13713] Interpass timing

2012-02-16T15:07:00.000+05:30

Dear

regards,

Debasish

Dubai.

+971504349936

On Wed, Feb 15, 2012 at 5:07 PM, jesti fer <jesti_fer@yahoo.com> wrote:

Dear experts,

I need your help, In our project (B.31.3) CS pipe joints ASTM A106 Gr.B 8" Sch XXS, our construction team kept the joints after root pass and hot pass welding, but our QC instructed to cut and and re-weld the joints. Really it is required and it is mentioned any were in code? We are maintaining preheat at 150-Deg and inter pass temp 300-Deg

Please help me;;;;

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Re: [MW:13712] RE: Drop Weight Test.

2012-02-16T13:56:00.000+05:30

Hi,

Please describe your application?

Test is more applicable for Pipelines where there is possibility that in an event of small
crack, it might run through quite a distance.

API5L Table18 & ASME B31.8 requires DWTT for linepipe after reaching a certain diameter
(If agreed, DWT testing of Pipe Body of welded pipe with D>508mm = Once per test unit of pipe)

Result values are specified in Percentage shear (ASTM E436), It assures resistance to ductility
running fracture if shear is 85% or better at the min. design temp. of the line, which a charly
bar does not, Test Coupon is comparably bigger than Charpy testing.

Regards
Manpreet Singh

From: Mohit Aggarwal
[mailto:aggarwalmohit05@gmail.com]
>Sent: Tuesday, February 14, 2012
10:17 AM
>To: materials-welding
>Cc:
christopher_rajku...@yahoo.com; george.dilintas@gr.bureauveritas.com;
manojac...@gmail.com; welding_engr_r...@charter.net; AA karandish; Abuhanip bin
Abdul; Ahmed Osman; akcme; Ali Asghari; Aly; AMIT PAHUJA; Amos Majola; Anil
Hegde; antony jenis; Arun Jacob; Arunachalam A; Ary Agung Prasetyo; asad azmi;
Brl Pp; Dindo; Dinesh Somwanshi; duc hoang; ENAYAT ZAREI; Endri Prasetyo; Fitria
Rahman; fredric; Garry Mat Eng.; Himan Nikdin; james gerald; John Henning; jose;
Kaja Mohideen; kannayeram gnanapandithan; Karthik; Kavin Murugam; ketan shah;
khemici badri; lakshman kumar; Madhusudan Rout; mahesh sanghvi; Mahmoud; meemo
prasad; Mehdi Emami; mpk mpk; MRG; Muhammed Ibrahim PK; muthu barathi; Nadgauda,
Subhas; Nandesh Kumar; Narendra Gohil; Neilash Kumar; Nizam Mohamad; pgoswami;
Pieper QSI; prabhakarmet@gmail.com; prem nautiyal; R.Lenin; rajeev arora;
rajkumarantoni; Ramchandra vichare; Ramin Kondori; ravi varman; S C Balawat;
sanggyu LEE; santhosh kumar; SAQIB SHIRAZI; sevak hiren; Shadab Alam Ansari;
shanmuga mari; snbagchi; Srinivas Engr; srinivasu; T. Mahendran; U WYNN-NAING;
vaibhav Joshi; venkat ramana; Vijay Katkar; vinit.deshpande; Vino Varghese; Wu
Hua; yogeshkumar Kumbhar; ZUL MAS
>Subject: Drop Weight
Test.
>
>
Respected Experts,

>
As per client Requirement We will have to conduct Drop Weight Test IN
NPCIL.. What is Drop Weight Test and how we will determine Nil ductility
transition temp..PLease reply

>
Thanks & REgards
MOhit Aggarwal.

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Re: [MW:13719] Can we do tack weld by pipe fitters?

2012-02-16T12:47:00.000+05:30

Hii

.you can NOT proceed the tack welds with pipe fitters ...you have to go for Qualified welders ONLY ...

Suresh

On Thu, Feb 16, 2012 at 9:04 AM, Doni Afrizal <doni.afrizal@gmail.com> wrote:

Dear all,

The question is " Can we do tack weld by pipe fitters according to ASME 31.3? "

so, we should go to ASME B31.3.

The Code said on part 328.5.1 (c) Tack welds shall be made by a qualified welder or welding operator.

Regards,
Doni Afrizal
IdWI, ASNT NDT Level 2 (MT,PT,RI)

On Wed, Feb 15, 2012 at 6:19 PM, manpreet <manpreetsin88@rediffmail.com> wrote:

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh

On Wed, 15 Feb 2012 09:04:56 +0530 wrote

>Can we do tack weld by pipe fitters according to ASME 31.3?

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Thanks & Best Regards,

Suresh

Mobile No: 974 - 5 5 4 3 1 7 8 8 / 7 7 1 3 4 5 9 0 . ( Qatar )

91 - 92 92 905 905 ( India )

Re: [MW:13711] IQI Selection

2012-02-16T12:08:00.000+05:30

Dear Mr.Sivakumar,

For ensitivity calculation you can consider reinofrcement as per sec v.The reinforcement means not only face reinforcement, that is inclusion of root also.so u can consider the both.If u consider the both you may get better sensitivity value closed to your requirement.

But as per EN code , you shall only consider the base metal thickness.

On Thu, Feb 16, 2012 at 9:12 AM, S.Sundar Rajan <as_sundarrajan@yahoo.com> wrote:

Dear Mr.siva kumar,

Internal protrusion or root penetration need not be considered while choosing IQI. The thickness of the base metal and reinforcement should be added. Because the width of the internal protrusion is very narrow usually (2 to 3 mm) . Only the reinforcement is covering full width of the bevel preparation.

With Regards,
s.sundarrajan,

QA/QC Inspector,

Special technical services LLC, Muscat,

M: +96898217243.

From: Siva Kumar <mailmrsiva@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Wednesday, 15 February 2012 4:47 PM
Subject: [MW:13705] IQI Selection

Dear All,

As per ASME SEC-V, ART -2,T-276.2, for IQI selection, it has been mentioned that the weld reinforcement as per the referencing code can be added with nominal wall thickness of the pipe.

As per B31.3, the acceptance for weld reinforcement or internal protrusion for wall thickness above 6mm to 13mm is 3mm.

If we take a 4" sch std pipe, thickness of which is 6.02mm, Can we take into consideration 6.02mm + 3mm for reinforcement + 3mm for internal protrusion - total 12.02mm as nominal wall thickness for the essential wire to be visible as per Table T276 in Sec V art 2?

If so, is there any reference that internal protrusion can also be considered?

Please suggest.

Siva.
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With Regards,

Muthukumaran P

Asst. Manager(Qa/Qc) / L&T - HCP (I)

HRS Pipeline Project / Abudhabi

Ph:+971503297345

Re: [MW:13710] Interpass timing

2012-02-16T11:21:00.000+05:30

The main reason for imposing restiction such as "1/4 of thickness shall be completed at the end of a day work, or jonts shall not be left overnight after welding root and hotpass" is not to stress the welds due its own weight of pipe line or some other restrains which may stress the component and may develop crack. (This statement is true only for carbon steel welding atleast).

so, in your case, you can do MPI testing of hot pass weld then pre heat to 300 degree celsius (to maintain interpass as well as preheat temperature), then proceed to complete the welding.

Murugesan

On Wed, Feb 15, 2012 at 9:07 PM, jesti fer <jesti_fer@yahoo.com> wrote:

Dear experts,

I need your help, In our project (B.31.3) CS pipe joints ASTM A106 Gr.B 8" Sch XXS, our construction team kept the joints after root pass and hot pass welding, but our QC instructed to cut and and re-weld the joints. Really it is required and it is mentioned any were in code? We are maintaining preheat at 150-Deg and inter pass temp 300-Deg

Please help me;;;;

--
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13708] RE: 13705] Information on Subsea Welding

2012-02-16T10:43:00.000+05:30

Dear Vijay,

May be we could discuss further . I have attached T-PUT catalogue on Oil & Gas applications for review .

Thanks

With Kind Regards

Amitabha Bhattacharya

Head-Application Technology

Bohler Welding Group India Pvt. Ltd.

A-140, Road No 23, Wagle Industrial Estate

Metropolitan, Ground Floor

Thane 400 604, India

Ph: +91 22 2582 8855/4228 4400

Mobile ;+91 9833998246

Email: amitabha.bhattacharya@bwgindia.com

Web: www.bohlerweldinggroupindia.com

A Böhler Welding Group Company

This email message and any attachments are for the sole use of the intended recipient(s) and contain confidential and/or privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message and any attachments

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Vijay.Tayade@akersolutions.com
Sent: Wednesday, February 15, 2012 6:25 PM
To: materials-welding@googlegroups.com
Subject: [MW:13705] Information on Subsea Welding

Hi,

Can anybody share there view on Subsea Equipment Welding utilized for welding of components used in Tie-in-System, Umbilical System, Wellhead, Xmas-Tree etc.

Regards
Vijay

Re: [MW:13709] IQI Selection

2012-02-16T10:42:00.000+05:30

Dear Mr.siva kumar,

Internal protrusion or root penetration need not be considered while choosing IQI. The thickness of the base metal and reinforcement should be added. Because the width of the internal protrusion is very narrow usually (2 to 3 mm) . Only the reinforcement is covering full width of the bevel preparation.

With Regards,
s.sundarrajan,

QA/QC Inspector,

Special technical services LLC, Muscat,

M: +96898217243.

From: Siva Kumar <mailmrsiva@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Wednesday, 15 February 2012 4:47 PM
Subject: [MW:13705] IQI Selection

Dear All,

As per ASME SEC-V, ART -2,T-276.2, for IQI selection, it has been mentioned that the weld reinforcement as per the referencing code can be added with nominal wall thickness of the pipe.

As per B31.3, the acceptance for weld reinforcement or internal protrusion for wall thickness above 6mm to 13mm is 3mm.

If we take a 4" sch std pipe, thickness of which is 6.02mm, Can we take into consideration 6.02mm + 3mm for reinforcement + 3mm for internal protrusion - total 12.02mm as nominal wall thickness for the essential wire to be visible as per Table T276 in Sec V art 2?

If so, is there any reference that internal protrusion can also be considered?

Please suggest.

Siva.

Re: [MW:13701] Can we do tack weld by pipe fitters?

2012-02-16T09:04:00.000+05:30

Dear all,

The question is " Can we do tack weld by pipe fitters according to ASME 31.3? "

so, we should go to ASME B31.3.

The Code said on part 328.5.1 (c) Tack welds shall be made by a qualified welder or welding operator.

Regards,

Doni Afrizal

IdWI, ASNT NDT Level 2 (MT,PT,RI)

On Wed, Feb 15, 2012 at 6:19 PM, manpreet <manpreetsin88@rediffmail.com> wrote:

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh

On Wed, 15 Feb 2012 09:04:56 +0530 wrote

>Can we do tack weld by pipe fitters according to ASME 31.3?

--

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Re: [MW:13702] Blind thickness design

2012-02-15T21:42:00.000+05:30

Dear Anish

Can you check in ASME SEC VIII Div -1 IN UG 34 C2, calculate the
flange thickness.

Regards

Afroz

On Mon, Feb 13, 2012 at 10:22 PM, anishdev <anishdev6@gmail.com> wrote:
> Dear all,
>
> Can someone help me to calculate the blind flange thickness
> for hydrostatic testing.
>
> Thanks and Regards
>
> Anish Dev.S
>
> Gulf East Engg
>
> Qatar
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.

[MW:13703] Bevel end preparation for butt weld

2012-02-15T20:54:00.000+05:30

Dear Experts,

I have a doubt pertaining to the bevel ends preparation as per ASME B16.25.

While defining the type of end preparation for butt welding as per ASME B16.25, say for e.g. for nominal wall thickness greater than 25 mm GTAW root pass, on what basis do we decide the type of the bevelled ends in Fig.6. i.e. is it type A or Type B?

Apart from the wall thickness what are the other parameters to be considered to select type of bevel ends from Fig.2(a), Fig,3(b)...etc. from ASME B 16.25. Is the base material also a parameter which governs for the selection of the type of bevel end preparation for butt welding?

I request if any of you could guide me. Thanking you all in advance,

Regards,

Harsha Bhat.

Re: [MW:13704] Blind thickness design

2012-02-15T19:03:00.000+05:30

You may use the attached file.

It is given for NPS Vs Thickness and allowable pressure.

arun

On Mon, Feb 13, 2012 at 10:22 PM, anishdev <anishdev6@gmail.com> wrote:

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

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Arunachalam.A,

Give a Man some Money, you make him Beggar for a Day.

Make him live on Welfare schemes, you succeeded in making him Beggar for life.

[MW:13705] Interpass timing

2012-02-15T18:37:00.000+05:30

Dear experts,

I need your help, In our project (B.31.3) CS pipe joints ASTM A106 Gr.B 8" Sch XXS, our construction team kept the joints after root pass and hot pass welding, but our QC instructed to cut and and re-weld the joints. Really it is required and it is mentioned any were in code? We are maintaining preheat at 150-Deg and inter pass temp 300-Deg

Please help me;;;;

[MW:13705] Information on Subsea Welding

2012-02-15T18:25:00.000+05:30

Hi,

Can anybody share there view on Subsea Equipment Welding utilized for welding of components used in Tie-in-System, Umbilical System, Wellhead, Xmas-Tree etc.

Regards
Vijay

[MW:13705] IQI Selection

2012-02-15T18:17:00.000+05:30

Dear All,

As per ASME SEC-V, ART -2,T-276.2, for IQI selection, it has been mentioned that the weld reinforcement as per the referencing code can be added with nominal wall thickness of the pipe.

As per B31.3, the acceptance for weld reinforcement or internal protrusion for wall thickness above 6mm to 13mm is 3mm.

If so, is there any reference that internal protrusion can also be considered?

Please suggest.

Siva.

Re: [MW:13700] Can we do tack weld by pipe fitters?

2012-02-15T16:49:00.000+05:30

Hi,

Qualification is required (see applicable design code).

e.g. ASME VIII/1, UW-31 CUTTING, FITTING, AND ALIGNMENT
….
(c) …..Tack welds, whether removed or left in place, shall be made using a fillet weld or butt
weld procedure qualified in accordance with Section IX. …

Regards
Manpreet Singh

On Wed, 15 Feb 2012 09:04:56 +0530 wrote
>Can we do tack weld by pipe fitters according to ASME 31.3?

--

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The views expressed/exchnaged in this group are members personel views and meant for
educational purposes only, Users must take their own decisions w.r.t. applicable
code/standard/contract documents.

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Re: [MW:13699] Blind thickness design

2012-02-15T16:29:00.000+05:30

Hi,

Nobody would be able to answer this unless required information is provided, Which Class,
Material, Size, pressure and temperature...

Please refer ASME B16.5, you will note that Table 22 has maximum size listed as 12" for #2500.
For all other Classes (upto #1500) maximum size is listed as 24".

If your design criteria falls within ASME B16.5 range then Simply Purchase Blind Flange in
accordance with ASME B16.5.

If not then refer ASME Sec Viii Div 1 UG-34 to calculate Blind Flange thickness, Usually it
would not be an easy exercise for a beginner but if you insist, i can send you some
calculations done in my current project (Give me your personnel e-mail ID).

Regards
Manpreet Singh

Dear all,

Can someone help me to calculate the blind
flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

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The views expressed/exchnaged in this group are members personel views and meant for
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code/standard/contract documents.
>

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[MW:13693] RE: 13690] RE: 13674] RE: 13665] Blind thickness design

2012-02-15T11:39:00.000+05:30

Anish,

Sorry for incomplete reply, please find below:

Regards,

Kukuh

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of anishdev
Sent: Wednesday, February 15, 2012 12:22 AM
To: materials-welding@googlegroups.com
Subject: [MW:13690] RE: 13674] RE: 13665] Blind thickness design

Thanks kukuh,

Can you please define the legends

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kukuh prahara
Sent: Tuesday, February 14, 2012 7:23 AM
To: materials-welding@googlegroups.com
Subject: [MW:13674] RE: 13665] Blind thickness design

Anish,

You can use below formula

Thanks,

Kukuh

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of anishdev
Sent: Tuesday, February 14, 2012 1:22 AM
To: materials-welding@googlegroups.com
Subject: [MW:13665] Blind thickness design

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

[MW:13695] Re: Ice formation on freon lines at damaged/uninsulated sections

2012-02-15T11:00:00.000+05:30

What is the material of the lines?
The carbon steel, loss its ductility when temperature goes below the
subzero tempe.
You can get the actual value of the temperature, then test the
material for impact value at this temp.
I hope you can get the required impact value for the pipe line
application from your design department.
If the values are not satisfactory, u can convience ur management,

regards
Sandeep Kumar

On Feb 14, 10:34 am, ags 36681 <ags1...@gmail.com> wrote:
> Dear friends,
> In our plant especially in refrigeration unit, so many lines (CS) or
> valves have failed insulation, say maintenance did some work on it and
> then not reinsulated, because of this, ice has formed on all over
> these uninsulated location.
>
> Some of the lines are in intermittent service (means alternate
> equipments are being used based on operation requirements, hence CUI
> is also expected),
>
> below doubts need your support to resolve.
> •How these locations will prone to premature failure. (Other than
> external corrosion).
> •Is there any brittle effect on material?
> •Kindly provide some good references to convince the management
> regarding the impact of this on equipments integrity.
>
> Regards,

[MW:13694] Re: Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-15T10:54:00.000+05:30

Dear Budi

Its very difficult to achive the stip chemical chemistry by single
layer cladding due to the dilution of the base metal.
during welding you are forming a cast, which have chemistry like a
casting, then as u said, u have taken the CA 3 mm away from the fusion
line, this will not help you as u required.
You may consult the supplier for a strip electrode, which can produce
a required chemistry as per standard requirement with combination of
flux.

regards
Sandeep Kumar

On Feb 14, 6:40 pm, budi.witjaks...@profab-group.com wrote:
> Dear Colleague,
> We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
> I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
> Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
> Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
> Regards,
>
> Budi Witjaksono

[MW:13695] Re: Can we do tack weld by pipe fitters?

2012-02-15T10:47:00.000+05:30

Tack welding must be done by the qualified person. Either its going to
be the part of the weld or its going to be removed before welding.
If the final weld include the tack, then the test piece during
qualification can have same condition practically, thats actually
means by welding qualification.
The qualification can be done as per ASME sec 9 or EN-287-1

Regards
Sandeep Kumar

On Feb 14, 2:03 am, mkn <mknag...@gmail.com> wrote:
> Can we do tack weld by pipe fitters according to ASME 31.3?

[MW:13697] Re: Drop Weight Test.

2012-02-15T10:41:00.000+05:30

The drop weight test (DWT) is a testing procedure where the behaviour
of material on brittle, extending crack is investigated.
During the test only test condition modified is temperature.
Now the term Nil ductility temperature (NDT) is that temperature where
a test piece break through while at 5K higher testing temperature, two
furhter test peices of the same material do not break any more is
called NDT.
The testing creteria is same as told by Mr. Gosawmi.

Regards
Sandeep

On Feb 14, 10:59 pm, "pgoswami" <pgosw...@quickclic.net> wrote:
> Hi Mohit,
>
> The purpose of drop weight test is to detect the Nil Ductility Temperature
> (NDT).The applicable standard is ASTM E-208. See the attached brief
> description for your information.Sec-III, NB2330 explains the basis for
> establishing the NDT.
>
> Hope this would clarify your query.
>
> Thanks.
>
> Pradip Goswami,P.Eng.IWE
>
> Welding & Metallurgical Specialist & Consultant
>
> Ontario, Canada.
>
> Email-pgosw...@sympatico.ca <blocked::mailto:Email-pgosw...@sympatico.ca> ,
>
> pgosw...@quickclic.net <blocked::mailto:pgosw...@quickclic.net>
>
> _____
>
> From: Mohit Aggarwal [mailto:aggarwalmohi...@gmail.com]
> Sent: Tuesday, February 14, 2012 10:17 AM
> To: materials-welding
> Cc: christopher_rajku...@yahoo.com; george.dilin...@gr.bureauveritas.com;
> manojac...@gmail.com; welding_engr_r...@charter.net; AA karandish; Abuhanip
> bin Abdul; Ahmed Osman; akcme; Ali Asghari; Aly; AMIT PAHUJA; Amos Majola;
> Anil Hegde; antony jenis; Arun Jacob; Arunachalam A; Ary Agung Prasetyo;
> asad azmi; Brl Pp; Dindo; Dinesh Somwanshi; duc hoang; ENAYAT ZAREI; Endri
> Prasetyo; Fitria Rahman; fredric; Garry Mat Eng.; Himan Nikdin; james
> gerald; John Henning; jose; Kaja Mohideen; kannayeram gnanapandithan;
> Karthik; Kavin Murugam; ketan shah; khemici badri; lakshman kumar;
> Madhusudan Rout; mahesh sanghvi; Mahmoud; meemo prasad; Mehdi Emami; mpk
> mpk; MRG; Muhammed Ibrahim PK; muthu barathi; Nadgauda, Subhas; Nandesh
> Kumar; Narendra Gohil; Neilash Kumar; Nizam Mohamad; pgoswami; Pieper QSI;
> prabhakar...@gmail.com; prem nautiyal; R.Lenin; rajeev arora;
> rajkumarantoni; Ramchandra vichare; Ramin Kondori; ravi varman; S C Balawat;
> sanggyu LEE; santhosh kumar; SAQIB SHIRAZI; sevak hiren; Shadab Alam Ansari;
> shanmuga mari; snbagchi; Srinivas Engr; srinivasu; T. Mahendran; U
> WYNN-NAING; vaibhav Joshi; venkat ramana; Vijay Katkar; vinit.deshpande;
> Vino Varghese; Wu Hua; yogeshkumar Kumbhar; ZUL MAS
> Subject: Drop Weight Test.
>
> Respected Experts,
>
> As per client Requirement We will have to conduct Drop Weight Test IN
> NPCIL.. What is Drop Weight Test and how we will determine Nil ductility
> transition temp..PLease reply
>
> Thanks & REgards
> MOhit Aggarwal.
>
> ASTM E208 - 06.pdf
> 54KViewDownload

Re: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-15T10:34:00.000+05:30

Dear Mr.Pradip,

Is anything wrong in accepting more diluted weld deposition with the consideration of application ?

For example if our weld metal chemistry is meeting the requirement of Inconel 825 (weld overlay with Inconel 625) which satisfy the application condition without any failure.

Is there any test to confirm this ?

Rinshad

On Wed, Feb 15, 2012 at 7:23 AM, pgoswami <pgoswami@quickclic.net> wrote:

Hi Budi,

The weld deposit should meet C.A requirements of AWS/ASME SFA 5.14(see below). If I could re-collect from the past experiences, meeting C.A in single pass ESSC could be a problem(see the attachment).Fe dilution is always a problem in the first pass.It would be a good point to discuss the issue with the consumable supplier prior hand and resort to multipasses, if there're severe restrictions on Fe dilution in 625 overlay.

See the link for the soudometal product catalogue for SAWSC and ESSSC.The attachment is a page extracted from this document.

What is the design code? By any chance does the C.A of the deposit has to conform to API Spec, 5LD??

Appreciate your feedback.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

http://www.btwbr.com.br/images/ingsoudokay.pdf

Nb

(Cb)

Other

AWS Classification
m
UNS Number

C

Mn

Fe

P

S

Si

Cu

Ni
d
Co

Al

Ti

Cr

plus

Ta

Mo

V

W

Elements,

Total

On Tue, Feb 14, 2012 at 7:10 PM, <budi.witjaksono@profab-group.com> wrote:

Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,

Budi Witjaksono

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[MW:13692] RE: Drop Weight Test.

2012-02-15T09:29:00.000+05:30

Hi Mohit,

The purpose of drop weight test is to detect the Nil Ductility Temperature (NDT).The applicable standard is ASTM E-208. See the attached brief description for your information.Sec-III, NB2330 explains the basis for establishing the NDT.

Hope this would clarify your query.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

From: Mohit Aggarwal [mailto:aggarwalmohit05@gmail.com]
Sent: Tuesday, February 14, 2012 10:17 AM
To: materials-welding
Cc: christopher_rajku...@yahoo.com; george.dilintas@gr.bureauveritas.com; manojac...@gmail.com; welding_engr_r...@charter.net; AA karandish; Abuhanip bin Abdul; Ahmed Osman; akcme; Ali Asghari; Aly; AMIT PAHUJA; Amos Majola; Anil Hegde; antony jenis; Arun Jacob; Arunachalam A; Ary Agung Prasetyo; asad azmi; Brl Pp; Dindo; Dinesh Somwanshi; duc hoang; ENAYAT ZAREI; Endri Prasetyo; Fitria Rahman; fredric; Garry Mat Eng.; Himan Nikdin; james gerald; John Henning; jose; Kaja Mohideen; kannayeram gnanapandithan; Karthik; Kavin Murugam; ketan shah; khemici badri; lakshman kumar; Madhusudan Rout; mahesh sanghvi; Mahmoud; meemo prasad; Mehdi Emami; mpk mpk; MRG; Muhammed Ibrahim PK; muthu barathi; Nadgauda, Subhas; Nandesh Kumar; Narendra Gohil; Neilash Kumar; Nizam Mohamad; pgoswami; Pieper QSI; prabhakarmet@gmail.com; prem nautiyal; R.Lenin; rajeev arora; rajkumarantoni; Ramchandra vichare; Ramin Kondori; ravi varman; S C Balawat; sanggyu LEE; santhosh kumar; SAQIB SHIRAZI; sevak hiren; Shadab Alam Ansari; shanmuga mari; snbagchi; Srinivas Engr; srinivasu; T. Mahendran; U WYNN-NAING; vaibhav Joshi; venkat ramana; Vijay Katkar; vinit.deshpande; Vino Varghese; Wu Hua; yogeshkumar Kumbhar; ZUL MAS
Subject: Drop Weight Test.

Respected Experts,

As per client Requirement We will have to conduct Drop Weight Test IN NPCIL.. What is Drop Weight Test and how we will determine Nil ductility transition temp..PLease reply

Thanks & REgards

MOhit Aggarwal.

RE: [MW:13691] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-15T08:53:00.000+05:30

Hi Budi,

The weld deposit should meet C.A requirements of AWS/ASME SFA 5.14(see below). If I could re-collect from the past experiences, meeting C.A in single pass ESSC could be a problem(see the attachment).Fe dilution is always a problem in the first pass.It would be a good point to discuss the issue with the consumable supplier prior hand and resort to multipasses, if there're severe restrictions on Fe dilution in 625 overlay.

See the link for the soudometal product catalogue for SAWSC and ESSSC.The attachment is a page extracted from this document.

What is the design code? By any chance does the C.A of the deposit has to conform to API Spec, 5LD??

Appreciate your feedback.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

http://www.btwbr.com.br/images/ingsoudokay.pdf

(Cb)

Other

AWS Classificationm

UNS Number

Nid

plus

Ta

Elements,

Total

On Tue, Feb 14, 2012 at 7:10 PM, <budi.witjaksono@profab-group.com> wrote:

Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,

Budi Witjaksono

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13690] RE: 13674] RE: 13665] Blind thickness design

2012-02-14T22:52:00.000+05:30

Thanks kukuh,

Can you please define the legends

Anish,

You can use below formula

Thanks,

Kukuh

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

Re: [MW:13689] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-14T20:03:00.000+05:30

Dear Mr.Budi,

IN 625 has to meet the requirement as per code to ER Ni CrMo-3.

I do not know what is the chemistry of your strip and what flux is being used for single layer welding by ESSC.

with extra low carbon strip and high speed flux meant for ESSC process may give the required analysis.

vanchi

On Tue, Feb 14, 2012 at 7:10 PM, <budi.witjaksono@profab-group.com> wrote:

Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,

Budi Witjaksono

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Re: [MW:13688] Regarding ptc required at MDMT-35 deg centigrade

2012-02-14T19:38:00.000+05:30

If you are welding nozzle neck to flange, it is called a Category C weld, which does not require PTC, PTC is only required on Category A & B welds, but if you have an Elbow welded to the nozzle neck, then that is a Category B weld, which require a PTC. The way you can get away with it (especially that you are using low temp material) is to used WPS that is qualified to -35C and filler materials that are qualified to -35 C, then you can exempt your nozzle welds per UCS-67(d)

On Tue, Feb 14, 2012 at 4:53 AM, Vivek Pandey <vivek.pande06@gmail.com> wrote:

Dear sir,

I have some confusion regarding requirment of PTC. i have come across
some stregenth problem due to PTC requirement .as per my job MDMT of
that is -35 deg centigrade. as per drg/client i have been attached 2
PTC during welding of shell long seam with SMAW+ SAW process. .my
question there is required additional PTC for nozzle pipe to flange
joint.i am using for this joint GTAW + SMAW. as per TPI nozzle to
flange joint coming in category B joint so there is required
additional PTC if you are using different welding process other than
category A & B joint of shell long seam and cirseam.
CODE OF CONSTRUCTION ASME SECTION VIII DIV1 MDMT-35DEG
MATERIAL OF PIPE =SA333 GR6,
FLANGE MATERIAL SA350 LF2 CL1
Thk 11.06
1) Is there required PTC for above same material at MDMT-35 Degree centigrade.
2) Nozzle to flange joint coming in which category of weld joint.
3) does above impact tested product material fall in curve B of UCS 66

plz reply your anwer as soon as possible with suitable clarification
as per code requirement

Regards
VIVEK

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[MW:13687] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

2012-02-14T19:10:00.000+05:30

Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,

Budi Witjaksono

Re: [MW:13686] Can we do tack weld by pipe fitters?

2012-02-14T18:46:00.000+05:30

If the tack welding is final part of the weld, it should be done by a qualified welder. Otherwise no need.

Regards,

Nareshkumar subramanian

From: Vino Varghese <vinopvarghese@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, February 14, 2012 3:57 PM
Subject: Re: [MW:13681] Can we do tack weld by pipe fitters?

Please make sure to check the Client Specification aslo as most of the Specification instruct " TACK WELD shall be done by QUALIFIED WELDER...

Regards

Vino

On Tue, Feb 14, 2012 at 8:54 AM, james gerald <gerry_tup@yahoo.com> wrote:

Yes Tack welding can be done by Pipe Fitters provided those tack welds are removed and donot form a part of completed weld joint.

Else Pipe Fitters can be Qualified inaccordance with ASME Sec.IX for welder qualification.

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

From: mkn <mknaguib@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Tuesday, February 14, 2012 2:33 AM
Subject: [MW:13666] Can we do tack weld by pipe fitters?

Can we do tack weld by pipe fitters according to ASME 31.3?

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:13684] Can we do tack weld by pipe fitters?

2012-02-14T18:07:00.000+05:30

Yes, can do tack weld by your fitter BUT you must make sure the tack weld shall be removed during welding by qualified welder.

WAP

From: Vino Varghese <vinopvarghese@gmail.com>

Sender: materials-welding@googlegroups.com

Date: Tue, 14 Feb 2012 14:27:41 +0400

To: <materials-welding@googlegroups.com>

ReplyTo: materials-welding@googlegroups.com

Subject: Re: [MW:13681] Can we do tack weld by pipe fitters?

Please make sure to check the Client Specification aslo as most of the Specification instruct " TACK WELD shall be done by QUALIFIED WELDER...

Regards

Vino

On Tue, Feb 14, 2012 at 8:54 AM, james gerald <gerry_tup@yahoo.com> wrote:

Yes Tack welding can be done by Pipe Fitters provided those tack welds are removed and donot form a part of completed weld joint.

Else Pipe Fitters can be Qualified inaccordance with ASME Sec.IX for welder qualification.

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

From: mkn <mknaguib@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Tuesday, February 14, 2012 2:33 AM
Subject: [MW:13666] Can we do tack weld by pipe fitters?

Can we do tack weld by pipe fitters according to ASME 31.3?

--
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13683] Regarding ptc required at MDMT-35 deg centigrade

2012-02-14T17:23:00.000+05:30

Dear sir,

I have some confusion regarding requirment of PTC. i have come across
some stregenth problem due to PTC requirement .as per my job MDMT of
that is -35 deg centigrade. as per drg/client i have been attached 2
PTC during welding of shell long seam with SMAW+ SAW process. .my
question there is required additional PTC for nozzle pipe to flange
joint.i am using for this joint GTAW + SMAW. as per TPI nozzle to
flange joint coming in category B joint so there is required
additional PTC if you are using different welding process other than
category A & B joint of shell long seam and cirseam.
CODE OF CONSTRUCTION ASME SECTION VIII DIV1 MDMT-35DEG
MATERIAL OF PIPE =SA333 GR6,
FLANGE MATERIAL SA350 LF2 CL1
Thk 11.06
1) Is there required PTC for above same material at MDMT-35 Degree centigrade.
2) Nozzle to flange joint coming in which category of weld joint.
3) does above impact tested product material fall in curve B of UCS 66

plz reply your anwer as soon as possible with suitable clarification
as per code requirement

Regards
VIVEK

[MW:13683] RE: 13665] Blind thickness design

2012-02-14T16:27:00.000+05:30

Pls. use this one.

Best Regards,
PpP
(Phumpong P)

FE QA Ext. 5455404,
C/P 5456000 Ext.1490 , 0818440563

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

‏‏رد: [MW:13682] Clarification on QW-423.1

2012-02-14T16:03:00.000+05:30

although the P no is essential for welder qualification, some P no are similar in respect to welding performance and so the mentioned clause determine these P no.
but you have to notice that you still have the F no is essential variable which is the most important variable in welder qualification.
so if you weld a P no 1 plate you can weld P-No. 1 through P-No. 15F,P-No. 34, and P-No. 41 through P-No. 49 but you have to consider the filler metal F no.
an examble, if you used ASTM A36 which is P no 1 in welder qualification using E7018 electrode which is F no 4 the welder is not qualified to weld ASTM A240. grade 304L which is p no 8 using E308L electrode which is F no 5.
but if the you used ASTM A36 which is P no 1 in welder qualification using E71T1(FCAW wire) which is F no 6 the welder is qualified to weld ASTM A240. grade 304L which is p no 8 using ER308L (FCAW wire) which is also F no 6.

________________________________________
‏‏من: ‏‏materials-welding@googlegroups.com [materials-welding@googlegroups.com] بالنيابة عن PRAMOD KARAPPAKUTTY [pramodvkmly@gmail.com]
‏‏تاريخ الإرسال: 14 فبراير, 2012 12:10 م
To: materials-welding@googlegroups.com
‏‏الموضوع: [MW:13680] Clarification on QW-423.1

Dear Experts,
I expect your valuable advice.
As per ASME Sec IX, QW-423.1 It has been detailed that "When a base metal shown in the left column is
used for welder qualification, the welder is qualified to weld all combinations of base metals shown in
the right column, including unassigned metals of similar chemical composition to these metals."
Base Metals for Welder Qualified Production
Qualification Base Metals

P-No. 1 through P-No. 15F, P-No. 1 through P-No. 15F,
P-No. 34, and P-No. 41 P-No. 34, and P-No. 41
through P-No. 49 through P-No. 49

P-No. 21 through P-No. 26 P-No. 21 through P-No. 26

P-No. 51 through P-No. 53 or P-No. 51 through P-No. 53 and
P-No. 61 and P-No. 62 P-No. 61 and P-No. 62

This has been explained in latest edition (2010), still I have some doubts. As we know 'P' number is essential variable, one welder qualified for one 'P' number cannot weld other 'P' material. But this above mentioned instruction gives some confusion regarding this matter. So anybody can please explain to clarify my doubt.
Thanking You,
Pramod.

Re: [MW:13681] Can we do tack weld by pipe fitters?

2012-02-14T15:57:00.000+05:30

Please make sure to check the Client Specification aslo as most of the Specification instruct " TACK WELD shall be done by QUALIFIED WELDER...

Regards

Vino

On Tue, Feb 14, 2012 at 8:54 AM, james gerald <gerry_tup@yahoo.com> wrote:

Yes Tack welding can be done by Pipe Fitters provided those tack welds are removed and donot form a part of completed weld joint.

Else Pipe Fitters can be Qualified inaccordance with ASME Sec.IX for welder qualification.

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

From: mkn <mknaguib@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Tuesday, February 14, 2012 2:33 AM
Subject: [MW:13666] Can we do tack weld by pipe fitters?

Can we do tack weld by pipe fitters according to ASME 31.3?

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13680] Clarification on QW-423.1

2012-02-14T15:40:00.000+05:30

Dear Experts,

I expect your valuable advice.

As per ASME Sec IX, QW-423.1 It has been detailed that "When a base metal shown in the left column is

used for welder qualification, the welder is qualified to weld all combinations of base metals shown in

the right column, including unassigned metals of similar chemical composition to these metals."

Base Metals for Welder Qualified Production

Qualification Base Metals

P-No. 1 through P-No. 15F, P-No. 1 through P-No. 15F,

P-No. 34, and P-No. 41 P-No. 34, and P-No. 41

through P-No. 49 through P-No. 49

P-No. 21 through P-No. 26 P-No. 21 through P-No. 26

P-No. 51 through P-No. 53 or P-No. 51 through P-No. 53 and

P-No. 61 and P-No. 62 P-No. 61 and P-No. 62

Thanking You,

Pramod.

Re: [MW:13679] Can we do tack weld by pipe fitters?

2012-02-14T14:58:00.000+05:30

Hi,

As per B31.3 - K328.5.1 (c) - Tack welds Shall be made by a Qualified Welder or Welding Operator. According to that, you cannot use your fitters for tack welds unless otherwise they qualified.

Thanks & Regards,

(Karthik)

Karthikeyan.S

QA/QC Manager

German-Thai Boiler Engineering Cooperation Limited.

Rayong Factory ;

379 Moo.6 Soi 8, Tambol Pananikom,

Nikompattana, Rayong 21180 THAILAND

Tel : +66 38 897 035-9 Ext. 137

Fax : +66 38 897 034

Hand Phone: 0066 892512282

From: james gerald <gerry_tup@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Tuesday, February 14, 2012 11:54 AM
Subject: Re: [MW:13669] Can we do tack weld by pipe fitters?

Yes Tack welding can be done by Pipe Fitters provided those tack welds are removed and donot form a part of completed weld joint.

Else Pipe Fitters can be Qualified inaccordance with ASME Sec.IX for welder qualification.

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

From: mkn <mknaguib@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Tuesday, February 14, 2012 2:33 AM
Subject: [MW:13666] Can we do tack weld by pipe fitters?

Can we do tack weld by pipe fitters according to ASME 31.3?

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Re: [MW:13678] Can we do tack weld by pipe fitters?

2012-02-14T13:59:00.000+05:30

We cannot use the unqualified welders to do tack welds,please give the training to pipe fitters and qualify them as per Sec IX( at least in flat position ) .

All the welding should be done by qualified welders it includes the tack welding also .

Rinshad

On Tue, Feb 14, 2012 at 11:54 AM, syed moinul hasan <mhsyed1@gmail.com> wrote:

No you cannt tack weld, unless the welder is qualifies.

Moin

On 14 February 2012 02:33, mkn <mknaguib@gmail.com> wrote:

Can we do tack weld by pipe fitters according to ASME 31.3?

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Thanks and Regards................?

Rinshad abdul rahiman

Q.C.E

OCEAN RUBBER FACTORY L.L.C-ENGG.DIV

Al-ghail industrial park,Ras al khaima

Tel: +971507103778

qc2@oceanrubber.com

Re: [MW:13676] Can we do tack weld by pipe fitters?

2012-02-14T13:24:00.000+05:30

No you cannt tack weld, unless the welder is qualifies.

Moin

On 14 February 2012 02:33, mkn <mknaguib@gmail.com> wrote:

Can we do tack weld by pipe fitters according to ASME 31.3?

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[MW:13677] Re: Blind thickness design

2012-02-14T12:15:00.000+05:30

Dear Anish

The Blind flange is selected based on the dia of the nozzle nozzle,
hydro pressure.But if you dont know, use blind flange thickness
equivalent to attachment flange thickness(not neck thk).

Regards

Santhosh

On Feb 13, 10:22 pm, "anishdev" <anishd...@gmail.com> wrote:
> Dear all,
>
> Can someone help me to calculate the blind flange thickness
> for hydrostatic testing.
>
> Thanks and Regards
>
> Anish Dev.S
>
> Gulf East Engg
>
> Qatar

[MW:13675] Ice formation on freon lines at damaged/uninsulated sections

2012-02-14T11:04:00.000+05:30

Dear friends,
In our plant especially in refrigeration unit, so many lines (CS) or
valves have failed insulation, say maintenance did some work on it and
then not reinsulated, because of this, ice has formed on all over
these uninsulated location.

Some of the lines are in intermittent service (means alternate
equipments are being used based on operation requirements, hence CUI
is also expected),

below doubts need your support to resolve.
•How these locations will prone to premature failure. (Other than
external corrosion).
•Is there any brittle effect on material?
•Kindly provide some good references to convince the management
regarding the impact of this on equipments integrity.

Regards,

Re: [MW:13672] Blind thickness design

2012-02-14T10:55:00.000+05:30

Dear Anish Dev,

Please find below

CALCULATION FOR THE BLIND FLANGE:

(AS PER ASME BOILER AND PRESSURE VESSEL CODE / VIII DIV I)

The blind flange is attached by bolts causing an edge moment (Fig. UG- 34. /sketch j) in which the thickness can be calculated by :

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….Formula (2) (From ASME UG-34)

Where,

d= Diameter or short span, measured as indicated in Fig. UG-34

E= Joint efficiency, from Table UW-12, of any category A weld as defined in UG-

3(a)

S= Maximum allowable stress value in tension from applicable table of value

Referenced by UG-23

W= Total bolt load (From pipe data pro)

hg= Gasket moment arm, equal to the radial distance from the centerline of the

bolts to the line of the gasket reaction, Table 2-5.2

P = Design pressure-HYDROTEST pressure is considered (13.5 bar (g))

C = 0.3 From Fig UG-34(j)

THICKNESS CALCULATION FOR THE 32" BLIND FLANGE :

Using the above formula (2)

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 876.5 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 94 KG

hg= 50.75 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 876.5*[(0.3*13.76/1757*1) + (1.9*94*98)/ (1757*1*876.5^3)] ½

= 42.48mm or 42.5 mm

Therefore from the above calculation, the minimum thickness required for the 32" blind flange is :

t = 42.48 mm

THICKNESS CALCULATION FOR THE 36" BLIND FLANGE :

Using the above formula (2)

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 978.2 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 117 KG

hg= 53.25 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 978.2*[(0.3*13.76/1757*1) + (1.9*117*98)/ (1757*1*978.2^3)] ½

= 47.41mm or 47.5 mm

Therefore from the above calculation, the minimum thickness required for the 36" blind flange is :

t = 47.41 mm

THICKNESS CALCULATION FOR THE 38" BLIND FLANGE :

Using the above formula (2)

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 1038 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 132 KG

hg= 55.5 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 1038*[(0.3*13.76/1757*1) + (1.9*132*98)/ (1757*1*1038^3)] ½

= 50.31mm or 50.5 mm

Therefore from the above calculation, the minimum thickness required for the 38" blind flange is :

t = 50.31 mm

THICKNESS CALCULATION FOR THE 44" BLIND FLANGE :

Using the above formula (2)

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 1118 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 178 KG

hg= 98 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 1118*[(0.3*13.76/1757*1) + (1.9*178*98)/ (1757*1*1118^3)] ½

= 54.19 mm

Therefore from the above calculation, the minimum thickness required for the 44" blind flange is :

t = 54.19 mm

THICKNESS CALCULATION FOR THE 46" BLIND FLANGE :

Using the above formula (2)

t = d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 1168 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 180 KG

hg= 98.5 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 1168*[(0.3*13.76/1757*1) + (1.9*180*98.5)/ (1757*1*11168^3)] ½

= 57 mm

Therefore from the above calculation, the minimum thickness required for the 46" blind flange is :

t = 57 mm

THICKNESS CALCULATION FOR THE 48" BLIND FLANGE :

Using the above formula (2)

t= d *(CP/SE+1.9W hg/SE*d^3) ½ ……………….formula (2) (from ASME UG 34)

d= 1219 mm

C= 0.3

P = 13.76 kg/sq cm

E = 1

W = 202 KG

hg= 101.5 mm

S = 25 ksi = 1757 kg/sq.cm

Substituting the above values in Formula (2),

t = 1219*[(0.3*13.76/1757*1) + (1.9*202*101.5)/ (1757*1*1219^3)] ½

= 59.09 = 59 mm

Therefore from the above calculation, the minimum thickness required for the 48" blind flange is :

t = 59 mm

Conclusion:

Since from the above calculation, 50 mm plate thickness required for the 32", 36" & 38" with stress ration as 1.0

And 60mm thick plate is required for 44", 46", 48" blind flanges at 13.5 bar (g) hydro test pressure and at ambient temperature.

However if the thickness of the blind flange is less than required then additional reinforcements or stiffeners has to be provided.

On Mon, Feb 13, 2012 at 9:22 PM, anishdev <anishdev6@gmail.com> wrote:

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

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Re: [MW:13670] Thickness Range Qualified by Welder - ASME Sec. IX

2012-02-14T10:46:00.000+05:30

Dear,

Yes,he can weld but remember t pass > 13mm is essential variable for
SMAW,SAW,FCAW,GMAW.

If he weld t pass > 13mm your WPS only qualified base metal T <
1.1Tpqr (see qw-403.9)

Regards,
Doni Afrizal
IdWI, ASNT NDT Level 2 (MT,PT,RI)

Karthik wrote:
> Yes. He can weld up to maximum to be welded
>
> Thanks & Regards,
>
>
> (Karthik)
>
>
> Karthikeyan.S
> QA/QC Manager
> German-Thai Boiler Engineering Cooperation Limited.
> Rayong Factory ;
> 379 Moo.6 Soi 8, Tambol Pananikom,
> Nikompattana, Rayong 21180 THAILAND
> Tel : +66 38 897 035-9 Ext. 137
> Fax : +66 38 897 034
> Hand Phone: 0066 892512282
>
>
> ________________________________
> From: Vivek Jadhav (HFGR) <VJadhav@ccc.ae>
> To: materials-welding@googlegroups.com
> Sent: Tuesday, February 14, 2012 10:57 AM
> Subject: [MW:13667] Thickness Range Qualified by Welder - ASME Sec. IX
>
>
>
> Dear Experts,
> Can someone explain me following ASME clause regarding
> thickness range qualified by welder & is it OK if a welder welds 13 mm
> & above with 3 or more layers, he is qualified for maximum thickness ( e.g.
> 50mm or more )
>
>
>
>
>
>
>
>
>
> Best Regards,
> Vivek Jadhav
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:13669] Can we do tack weld by pipe fitters?

2012-02-14T10:24:00.000+05:30

Yes Tack welding can be done by Pipe Fitters provided those tack welds are removed and donot form a part of completed weld joint.

Else Pipe Fitters can be Qualified inaccordance with ASME Sec.IX for welder qualification.

Thanks & Regards

J.Gerald Jayakumar
0091-9344954677

Re: [MW:13669] Thickness Range Qualified by Welder - ASME Sec. IX

2012-02-14T10:03:00.000+05:30

Yes he can weld up to maximum to be welded

Thanks &regards

Guru.S.M

On Tue, Feb 14, 2012 at 6:57 AM, Vivek Jadhav (HFGR) <VJadhav@ccc.ae> wrote:

Dear Experts,

Can someone explain me following ASME clause regarding thickness range qualified by welder & is it OK if a welder welds 13 mm & above with 3 or more layers, he is qualified for maximum thickness ( e.g. 50mm or more )

Best Regards,

Vivek Jadhav

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13674] RE: 13665] Blind thickness design

2012-02-14T09:52:00.000+05:30

Anish,

You can use below formula

Thanks,

Kukuh

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

Re: [MW:13673] Thickness Range Qualified by Welder - ASME Sec. IX

2012-02-14T09:46:00.000+05:30

Dear friend,

As per below clause upto 12 mm 2t qualify, and for maximum take 13 and high thk plate with minimum 3 layers in single process.

Regards,
Shaunak,

On Feb 14, 2012 9:35 AM, "Vivek Jadhav (HFGR)" <VJadhav@ccc.ae> wrote:

Dear Experts,

Can someone explain me following ASME clause regarding thickness range qualified by welder & is it OK if a welder welds 13 mm & above with 3 or more layers, he is qualified for maximum thickness ( e.g. 50mm or more )

Best Regards,

Vivek Jadhav

--
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:13668] Thickness Range Qualified by Welder - ASME Sec. IX

2012-02-14T09:38:00.000+05:30

Yes. He can weld up to maximum to be welded

Thanks & Regards,

(Karthik)

Karthikeyan.S

QA/QC Manager

German-Thai Boiler Engineering Cooperation Limited.

Rayong Factory ;

379 Moo.6 Soi 8, Tambol Pananikom,

Nikompattana, Rayong 21180 THAILAND

Tel : +66 38 897 035-9 Ext. 137

Fax : +66 38 897 034

Hand Phone: 0066 892512282

From: Vivek Jadhav (HFGR) <VJadhav@ccc.ae>
To: materials-welding@googlegroups.com
Sent: Tuesday, February 14, 2012 10:57 AM
Subject: [MW:13667] Thickness Range Qualified by Welder - ASME Sec. IX

Dear Experts,

Can someone explain me following ASME clause regarding thickness range qualified by welder & is it OK if a welder welds 13 mm & above with 3 or more layers, he is qualified for maximum thickness ( e.g. 50mm or more )

Best Regards,

Vivek Jadhav

[MW:13667] Thickness Range Qualified by Welder - ASME Sec. IX

2012-02-14T09:27:00.000+05:30

Dear Experts,

Best Regards,

Vivek Jadhav

[MW:13666] Can we do tack weld by pipe fitters?

2012-02-14T02:33:00.000+05:30

Can we do tack weld by pipe fitters according to ASME 31.3?

[MW:13665] Blind thickness design

2012-02-13T23:52:00.000+05:30

Dear all,

Can someone help me to calculate the blind flange thickness for hydrostatic testing.

Thanks and Regards

Anish Dev.S

Gulf East Engg

Qatar

[MW:13664] RE: 13648] What is maximum limit for PWHT soaking temperature for P.No.1 Gr.1 & 2?

2012-02-13T21:46:00.000+05:30

As you already know the construction codes (e.g. ASME I, ASME VIII) give a minimum PWHT temperature. While these Codes do not specify an upper limit, ASME Section IX, QW-407.1 tells you that a new PQR would be required if the PWHT temperature is above the lower critical temperature (T_PWHT> A1 temperature). Thus any sub-critical PWHT qualifies a range from the Code minimum to the lower critical temperature. Some common sense should apply. The engineer must be aware of the change in properties that can occur as T_PWHT approaches the lower critical temperature. Obviously, greater softening will occur but at the same time the tensile and yield strength will decrease and the ductile-to-brittle transition temperature (DBTT) will increase. Upper shelf energy also tends to drop.

Generally, this only becomes an issue when a transition joint between Cr-Mo and CS is required. The Cr-Mo side of the joint will drive the necessity for PWHT and the temperature range for PWHT. In my experience, the biggest challenge is selection of the proper filler metal especially if a complex assembly {with CS-CS welds as well as Cr-Mo} is PWHT’ed. Then selection of the carbon steel filler metal or filler metal/flux is crucial to maintaining minimum required properties in the CS-CS welds.

John A. Henning

Welding & Materials

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Tariq Hussain
Sent: Thursday, February 09, 2012 1:18 PM
To: materials-welding@googlegroups.com
Subject: [MW:13648] What is maximum limit for PWHT soaking temperature for P.No.1 Gr.1 & 2?

Dear Friends,

minimum PWHT Soaking temperature is given in ASME Sec VIII Div. 1 UCS-56, My question is What is maximum temperature that we can use for PWHT with reference to some applicable standards or metallurgical point of view point?

Can we do PWHT for P.No.1 Gr.1 & 2 (e.g SA 516 Gr. 60 & 70) maximum up to lower critical temperature i.e. 723 Degree Centigrade?

Thanks in Advance for your valuable share.

Re: [MW:13663] Seal Weld Tube to Tube Sheet Titanium

2012-02-13T17:41:00.000+05:30

Dear Sir,

The problem may be due to the followings....

1. improper rolling of tube to tube sheet
2. improper cleaning of tube sheet chamber
3. improper setting of tungsten rod with the weld head

so, check the thinning percentage of tube with the tube sheet, ensure
the cleaning of tube sheet & tube & try to weld some mock-up pieces
for ensuring the proper working of weld head.

also check the weld overlap at the end of weld. the excess over laping
of weld can also make such a problems.

On 2/13/12, wiwit ajipamungkas <w.ajipamungkas.keu@gmail.com> wrote:
> Dear All Experts,
>
> I have problem (fault) of the result of seal welding titanium tube to tube
> sheet (Tube thick=0.4 ; OD= 24mm) like photo attached, would you give me
> information what root cause of that result..? and how preventive action..?
>
> Thanks you & Best Regards,
>
> WAP
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>

--
Yours,

R.Manikandan

[MW:13662] Brach Weld for Cement lined pipe

2012-02-13T14:52:00.000+05:30

Dear Experts,

I want to tap 6" line from 10" header which is internally cement lined. Pipe configurations are

MOC : A106 Gr.B

Service : Sea Water

Pressure : 5 kg/sq.cm

Please tell me if branch weld is possible..!! , what is the minimum size possible for branch line (for Branch weld).

Regards,

KRISHNAKUMAR.M.S

Piping Engineer

Fact Engineering & Design Organization (FEDO)

KERALA, INDIA

[MW:13660] Seal Weld Tube to Tube Sheet Titanium

2012-02-13T13:16:00.000+05:30

Dear All Experts,

I have problem (fault) of the result of seal welding titanium tube to tube sheet (Tube thick=0.4 ; OD= 24mm) like photo attached, would you give me information what root cause of that result..? and how preventive action..?

Thanks you & Best Regards,

WAP

Re: [MW:13660] Procedure qualification with Impact test & PWHT

2012-02-13T10:13:00.000+05:30

Hi,

To simplify, i would paraphrase QW-407.2 as below:-

"PWHT time for PQR shall be min. 80% of that in WPS",Your case is not relevant to this clause.

PWHT time shall be same as of PQR if same thickness, as the thickness changes time would vary.
For Eg:- PQR qualified with 25mm thickness and PWHT'd for 1hr now WPS with 16mm thickness time
shall be 38 minutes.

Regards
Manpreet Singh

On Sun, 12 Feb 2012 09:08:43 +0530 wrote
>Dear all,

Request your kind clarification on the below subject.

For Welding Procedure Qualification as per ASME SEC IX , with impact test and PWHT.

1) QW 407.2 states " The procedure qualification test shall be subjected to PWHT essentially
equivalent to that encountered in the fabrication of production welds, including at least 80%
of the aggregate times at temperature"

Question:
Can we use a PQR for a production weld, which has PWHT to be done for a shorter duration than
that recorded in the PQR. (e.g. PQR qualifed at 620 degC for 120minutes and production
requirement 620 degC for 100 minutes)

2) Please find attachedfile.

regards
lsk

--
>
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>
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>
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>
The views expressed/exchnaged in this group are members personel views and meant for
educational purposes only, Users must take their own decisions w.r.t. applicable
code/standard/contract documents.
>

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Re: [MW:13659] What is maximum limit for PWHT soaking temperature for P.No.1 Gr.1 & 2?

2012-02-13T09:56:00.000+05:30

Hi,

ASME Sec Viii Div 1 UCS-56 only mandates min. PWHT temperature and even that can be reduced
further a bit by compensating more time per UCS-56.1

Max. PWHT temperature shall never exceed lower transformation temperature for below reason:-

Guessing that thickness of component would be more than 32mm or above so heat treatment
condition would be either Normalizing or Quenching and Tempering:-

For Normalizing:- component heat treated above Ac3 (upper critical temperature and cooled under
control to form Ferrite + Pearlite microstructure, PWHT is carried out to reduce residual
stresses produced during thermal changes but must be below Lower critical temperature not to
change the microstructure.

For Quenching and Tempering:- component heat treated above Ac3 and cooled in water/oil forming
martensite to gain better strength but with excessive hardness then tempering at below Ac1
(lower critical temp) to temper the martensite thus reduce hardness and increase ductility and
toughness.
PWHT temperature is generally kept below 30deg C below tempering not to alter properties
maintained however there would be slight decrease in strength and toughness, is the reason
often client require to simulate with test coupons of same heat treatment that PWHT does not
reduce mechanical properties below required.

Regards
Manpreet Singh

On Sat, 11 Feb 2012 09:13:17 +0530 wrote
>Dear Friends,minimum PWHT Soaking temperature is given in ASME Sec VIII Div. 1 UCS-56, My
question is What is maximum temperature that we can use for PWHT with reference to some
applicable standards or metallurgical point of view point?ORCan we do PWHT for P.No.1 Gr.1 & 2
(e.g SA 516 Gr. 60 & 70) maximum up to lower critical temperature i.e. 723 Degree Centigrade?
Thanks in Advance for your valuable share.

--
>
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[MW:13657] MW:13655--Thermal Cutting Procedure for Clad Plate(SA 516 Gr 70 + Alloy 825) / Please Share

2012-02-12T09:55:00.000+05:30

Hi Vino,

The default cutting method is plasma cutting.High power Oxy-fuel cutting is also feasible, but you may have to remove the wider kerf width by grinding. See the attached article for your reference.

Thanks.

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

On 6 February 2012 18:36, Vino Varghese <vinopvarghese@gmail.com> wrote:

Dear Technical Experts,

We are a company fabricating ASME Pressure Vessel and require your support for the subject matter for our project.

The base material is SA 516 Gr 70, 30 mm thick – Arcelor Mtthal

The Clad Material is Alloy 825, 4 mm thick – Thyseen Krupp

Process- Explosion Bonding

We require your assistance to understand the correct methodology to cut the Explosion Bonded Plate without any damage.

Hope to see you technical support as usual in this matter and any specific precaution to be considered during the thermal cutting process of above said plates. Please share any Procedure for subject.

Thanks & Regards

Vino - Doha, Qatar

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:13655] Thermal Cutting Procedure for Clad Plate(SA 516 Gr 70 + Alloy 825) / Please Share

2012-02-12T00:24:00.000+05:30

Dear Vino,

There are two options

1. Mark the cutting line, Carry out gouging using plasma hand held torch (optionaly) if you have mechanised edge preparation unit you can make a groove to remove the inconel layer (4mm), then cut the CS portion as normal oxy-fuel tourch

2. Mark the cutting line on the CS side and start cutting. for SS clad I have done and succeeded but I am not sure this will do for 825.

C. K. Purohit
+968 92840112

On 6 February 2012 18:36, Vino Varghese <vinopvarghese@gmail.com> wrote:

Dear Technical Experts,

We are a company fabricating ASME Pressure Vessel and require your support for the subject matter for our project.

The base material is SA 516 Gr 70, 30 mm thick – Arcelor Mtthal

The Clad Material is Alloy 825, 4 mm thick – Thyseen Krupp

Process- Explosion Bonding

We require your assistance to understand the correct methodology to cut the Explosion Bonded Plate without any damage.

Hope to see you technical support as usual in this matter and any specific precaution to be considered during the thermal cutting process of above said plates. Please share any Procedure for subject.

Thanks & Regards

Vino - Doha, Qatar

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[MW:13656] RE: 13648] What is maximum limit for PWHT soaking temperature for P.No.1 Gr.1 & 2?

2012-02-11T22:51:00.000+05:30

Dear Friends,

Can we do PWHT for P.No.1 Gr.1 & 2 (e.g SA 516 Gr. 60 & 70) maximum up to lower critical temperature i.e. 723 Degree Centigrade?

Thanks in Advance for your valuable share.