Materials & Welding: February 2012

Wednesday, February 29, 2012

[MW:13797] CSWIP 3.1 To AWS-CWI bridging exam

Dear Friends

I have recently heard that AWS has suspended CSWIP 3.1 to AWS CWI Bridging exam.

Is this true ?? When this has happened ?? I am surprised about this news !

Regards

Prem Nautiyal

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RE: [MW:13793] effect of SOOT formation on base material

Hello Asad Azmi,

What was the method used for preheating?

The soot formation as seen on the photos attached should not have any adverse effect on the material, however you will need to clean it before further processing.

Regards

George V Aliyattukudy

vijigeorge@dugas.ae

P Please consider the environment before printing this e-mail.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of asad azmi
Sent: 27 February 2012 17:59
To: materials-welding@googlegroups.com
Subject: [MW:13789] effect of SOOT formation on base material

Dear All,

Greetings.

During preheating of a weld joint SOOT( Black spots) was observed on the base material ( SA 516 GR 70- 50 Thk). Please refer attached photo.

Please explain is there any adverse effect on base material becuase of the SOOT formation.

Thanks & Regards

Asad Azmi

Re: [MW:13794] Weld-O-Let fillet size

Hi.
IN API 570 RECOMENDED 2 LAYER MINIMUN, IN MY EXPERIENCE IQUAL OR MAJOR TO NOMINAL THICKNESS OF HEATHER.
 
AGUSTIN

 
De: km hanif <hanif978@gmail.com>
Para: materials-welding@googlegroups.com 
Enviado: Sábado, febrero 25, 2012 9:22 A.M.
Asunto: [MW:13784] Weld-O-Let fillet size
 

Dear Experts,
I need your help for the attached subject
 
We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80 weld-o-let. How we can calculate the required fillet size and it is required to cover all portion (which area tacking with bore pipe)
  
Kindly help me,,

Thanks & Regards
 
 Hanifa K.
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Tuesday, February 28, 2012

Re: [MW:13795] BASE METAL THK. RANGE AS PER ASME SEC. IX.

Dear C.R.Gandhi,

For
1) 2.95 mm. for TIG and 6.6 mm. for SMAW. and All Size for Fillets.

2) i am not sure but as per my understand QW-202.4 is for Dissimilar Base metal Thickness But, you have PQR for 6 mm(there is no dissimilar thickness).

Regards,
Chirag Patel.
Welding Engineer.
The Anup Engg. LTD.

On Tue, Feb 28, 2012 at 5:39 PM, CHINTUKUMAR GANDHI <cgandhi1975@yahoo.com> wrote:

Dear Experts,

Good day to all. I have 2 cases which are to be shared with you for my knowledge.

(1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.)

As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range will be 2t (viz. 5 mm. for TIG and 12 mm. for SMAW.) for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct?

(2) I shall have to qualify a WPS of 6 mm. Base metal Thk. (T) of P No. 8 Group 1 to itself. Complete TIG.

As per my opinion, QW-202.4 (b) (1) and QW-451.1 Min Qualified T shall be 1.5 mm. and no limitation on Max. T qualified. As per QW 451.1 qualified deposited weld metal thk. range will be max. unlimited for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct?

Please share your experience with me on urgent basis.

Thanks & regards,

C. R. GANDHI

(Manager- Q. C.)

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[MW:13796] FW: 13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.

The answers with different colors

Ahmed Osman

Orascom Construction Egypt

+20 122 5880434

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of CHINTUKUMAR GANDHI
Sent: Tuesday, February 28, 2012 2:10 PM
To: materials-welding@googlegroups.com
Subject: [MW:13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.

Dear Experts,

Good day to all. I have 2 cases which are to be shared with you for my knowledge.

(1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.)

As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range will be 2t (viz. 5 mm. for TIG and 12 mm. for SMAW.) for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct? U R 100% correct

(2) I shall have to qualify a WPS of 6 mm. Base metal Thk. (T) of P No. 8 Group 1 to itself. Complete TIG.

As per my opinion, QW-202.4 (b) (1) and QW-451.1 Min Qualified T shall be 1.5 mm. and no limitation on Max. T qualified. As per QW 451.1 qualified deposited weld metal thk. range will be max. unlimited for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct? QW 202.4 is used only for dissimilar material thickness …… only u need 451 ( the thickness will be from 1.5 mm to 12 mm ) since you do not have impact

Please share your experience with me on urgent basis.

Thanks & regards,

C. R. GANDHI

(Manager- Q. C.)

[MW:13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.

Dear Experts,

Good day to all. I have 2 cases which are to be shared with you for my knowledge.

(2) I shall have to qualify a WPS of 6 mm. Base metal Thk. (T) of P No. 8 Group 1 to itself. Complete TIG.

Please share your experience with me on urgent basis.

Thanks & regards,

C. R. GANDHI

(Manager- Q. C.)

Re: [MW:13791] Details about lateral expansion in impact testing.

Dear, trichy

Please refer UHA-51 of ASME SECOND VIII DIV - 1.

Regards,
Chirag Patel.

Sent from BlackBerry® on Airtel

-----Original Message-----
From: "g.venkatesan06@gmail.com" <g.venkatesan06@gmail.com>
Sender: materials-welding@googlegroups.com
Date: Tue, 28 Feb 2012 03:24:17
To: materials-welding@googlegroups.com<materials-welding@googlegroups.com>
Reply-To: materials-welding@googlegroups.com
Subject: [MW:13790] Details about lateral expansion in impact testing.

Dear experts, iam freshers in fabrication field. Can any one give me the answers for the following question. 1. What is lateral expansion. 2. Why it is required instead of J in impact testing. 3. What is the acceptable value of lateral expansion in stainless steel and carbon and low alloy steel. Show the code reference our code of construction is ASME Sec VIII Div1. Regards venkat/sisco projects, trichy

[MW:13790] Details about lateral expansion in impact testing.

Monday, February 27, 2012

[MW:13789] effect of SOOT formation on base material

Dear All,

Greetings.

During preheating of a weld joint SOOT( Black spots) was observed on the base material ( SA 516 GR 70- 50 Thk). Please refer attached photo.

Please explain is there any adverse effect on base material becuase of the SOOT formation.

Thanks & Regards

Asad Azmi

Re: [MW:13787] Ferrite Number.....

This change in ferrite content is probably due to cooling rate difference .... related to solidification process.

Prashant Nimbalkar

From: shanmugam govindarajan <rajansgr@yahoo.com>
To: MW-Google Groups. <materials-welding@googlegroups.com>
Sent: Saturday, February 25, 2012 5:16 AM
Subject: [MW:13777] Ferrite Number.....

Dear Experts,

During Ferrite check on the strip cladding, we noticed FN as 1.5, 2, 2.5 whereas project specn requires 3 to 10.

These low FN is noticed near the cirseam joints in the vessel. May be the first or last pass of strip cladding when strip cladding is done in each shell.

Please send me some info about root cause, remedial action that is to be taken and reference to code/specn.

With regards,
Govi.

[MW:13788] Re: Weld-O-Let fillet size

Ref. ASME B31.3 2010

328.5.4 Weleded Branch Connections

(d)

Brd.

Set w.

On Feb 25, 8:52 pm, km hanif <hanif...@gmail.com> wrote:
> Dear Experts,
> I need your help for the attached subject
>
> We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr
> B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80
> weld-o-let. How we can calculate the required fillet size and it is
> required to cover all portion (which area tacking with bore pipe)
>
> Kindly help me,,
>
> Thanks & Regards
>
> Hanifa K.
>
> Weld O let.bmp
> 1552KViewDownload

RE: [MW:13786] RE: 13168] Low Hydrogen Electrode in Steel Structure Application

Gents,

I have interesting event. One of the client is expecting and interpreting the temperature 60 degree C must be on Electrodes. So now we are increasing the Quiver temperature nearly 100 degree C to reach the Electrodes temperature to 60 degree. But we are not sure about this concept. We are trying to satisfy my Client.

But apart from the above, All the Electrodes manufacturer confirmed that the Quiver must be heated condition at least 80 Deg C to ensure the electrodes will not pickup any moisture.

So you need follow the Manufacture recommendation unless you do not have client spec which is asking something stringent.

With Kind Regards,

Malai

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of I.K.Inspection Services
Sent: Sunday, February 26, 2012 10:07 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:13784] RE: 13168] Low Hydrogen Electrode in Steel Structure Application

Dear all,

I would like to add small comments addition to Mr Kaja, Baking and holding is not required if the electodes used directly from vacuum packed carton which is manufacturer package.

regards

On 8 December 2011 14:03, Kaja Mohideen <kaja@asw.sa> wrote:

Dear Mr. Endri,

All kinds of basic coated Electrode (Low Hydrogen) must be baked for (E7018) at 230 degrees for 2hours then it transferred to Holding oven at 120 degrees for continuous use, After that you can issue the electrode from holding oven to portable oven at Minimum 60 degrees maintain for shop and Site welding, Electrode return to holding oven at the end of the shift which electrode not exposed to atmospheric for the Maximum hours, So when the electrode exposed above the maximum hours, it shall be rebaked once, the rebaked electrode shall not be rebaked again, should scrap.

It’s all about to prevent the electrode to control Moisture Pickup

Refer AWS A5.1: Specification for Carbon steel Electrode

Best Regards,

Kaja Mohideen

QA/QC Manager

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Endri Prasetyo
Sent: Thursday, December 08, 2011 11:55 AM
To: materials-welding@googlegroups.com
Subject: [MW:13168] Low Hydrogen Electrode in Steel Structure Application

Dear Experts,

Anybody can advice please, when we use low hydrogen type electrode for steel structure welding erection (SMAW process) does it require to be baked all the time @70 C deg on work station?
Is it acceptable when the welder only keep the electrode into the portable oven without baking (after issued from holding oven) although it is a not best practice?
For information, the material of the steel structure is carbon steel Q235.

Appreciate your sharing. Thanks.

Regards,
Endri

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Sunday, February 26, 2012

Re: [MW:13784] RE: 13168] Low Hydrogen Electrode in Steel Structure Application

Dear all,

I would like to add small comments addition to Mr Kaja, Baking and holding is not required if the electodes used directly from vacuum packed carton which is manufacturer package.

regards

On 8 December 2011 14:03, Kaja Mohideen <kaja@asw.sa> wrote:

Dear Mr. Endri,

All kinds of basic coated Electrode (Low Hydrogen) must be baked for (E7018) at 230 degrees for 2hours then it transferred to Holding oven at 120 degrees for continuous use, After that you can issue the electrode from holding oven to portable oven at Minimum 60 degrees maintain for shop and Site welding, Electrode return to holding oven at the end of the shift which electrode not exposed to atmospheric for the Maximum hours, So when the electrode exposed above the maximum hours, it shall be rebaked once, the rebaked electrode shall not be rebaked again, should scrap.

It's all about to prevent the electrode to control Moisture Pickup

Refer AWS A5.1: Specification for Carbon steel Electrode

Best Regards,

Kaja Mohideen

QA/QC Manager

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Endri Prasetyo
Sent: Thursday, December 08, 2011 11:55 AM
To: materials-welding@googlegroups.com
Subject: [MW:13168] Low Hydrogen Electrode in Steel Structure Application

Dear Experts,

Anybody can advice please, when we use low hydrogen type electrode for steel structure welding erection (SMAW process) does it require to be baked all the time @70 C deg on work station?
Is it acceptable when the welder only keep the electrode into the portable oven without baking (after issued from holding oven) although it is a not best practice?
For information, the material of the steel structure is carbon steel Q235.

Appreciate your sharing. Thanks.

Regards,
Endri

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--
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[MW:13783] RE: 13778] Why constant Current (power source) used for Multi wire SAW

Hi Anil,

DC power sources for SAW are either of CV or CC type.

A constant-voltage power supply is self-regulating, so it can be used with a constant-speed wire feeder (relatively cheaper option). No voltage or current sensing is required. The current is controlled by the wire diameter, the electrical sickout, and the wire-feed speed, while the voltage is controlled by the power supply. Constant-voltage dc power is the best choice for the high-speed welding of thin steel. As you know GMAW/FCAW welding machines and majority of SAW machines are also of this type. The limitations of these machines are , they're sometimes unreliable is the current exceeds 1000A.

Unlike constant voltage, constant-current power supplies are not self-regulating, so they must be used with voltage sensing variable-wire-feed speed controls(more expensive). A constant-current wire feeder monitors arc voltage and adjusts the wire-feed speed in response to changes in the arc voltage. The wire-feed speed control attempts to maintain a constant arc length, while the power supply controls the arc current

The variations of SAW are as follows:-

Tandem SAW:-This process involves feeding two wires through 2 independent heads connected to 2 independent power sources.CC power source is preferred-choice since to get higher deposition one has to use of bigger diameter wire, typically 3.2 mm(1/8") dia upwards. for which CC type source is reliable. Tandem SAW ensures greater penetration and deposition. CC type power source ensures constant current, which is essential for melting of electrode. CV power source are good for smaller diameter wire(2.4 mm or below). Most of the high duty DC sub arc welding machines, e.g Lincoln Ideal arc or ESAB have both CV& CC features inbuilt in one system.

Note:-For tandem arc DC-DC combination is not advisable due to arc blow, so DC(lead)+ AC(trail) is the best choice or it could be AC+AC also.

Twin wire SAW:- involves feeding of two wires (typically 2.4 or 3.2 mm diameter max ) simultaneously through a common contact tip or head connected to single power source and feeds the same weld puddle. This process is not exactly recommended for thick wall welding. It could be accomplished with either with CV or CC type power source. CV power source is good for the above filler sizes.As the intention of this process is increased deposition, with amperage very seldom exceeding 1000-1100 Amps, a single power source of CV type of above capacity can meet the requirements.

The technology always changes. Hence the above limitations may not exists in the current generation of inverter type power sources. I would think it would be the best to get the recommendations of the welding equipment manufacturers to know the pros and cons of a specific SAW equipments.

Attached are two articles which explains the scenario

Thanks

Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario, Canada.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Anil Kumar
Sent: Friday, February 24, 2012 3:18 PM
To: Materials & Welding
Subject: [MW:13778] Why constant Current (power source) used for Multi wire SAW

Respected All,
Generally continuous electrode wire welding is recommended to use with constant voltage (CV) power source characteristic i.e. GMAW ,FCAW and single wire SAW.

For multi wire SAW instead of CV mode why constant current (CC) power source characteristic is recommended ???
what will be the effect on welding if we use CV mode for multi wire SAW.

Regards.

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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.

Saturday, February 25, 2012

[MW:13784] Weld-O-Let fillet size

Dear Experts,
I need your help for the attached subject

We are fabricating some well manifolds as per B31.3, Material ASTM A106. Gr B. header size 4" sch 40 (6.02mm thk) branch connections with 2" sch 80 weld-o-let. How we can calculate the required fillet size and it is required to cover all portion (which area tacking with bore pipe)

Kindly help me,,

Thanks & Regards

Hanifa K.

Re: [MW:13782] Clarification of PQR/WPS in FCAW process

Hi Rao,

Is it pipe or plate ?

For Non tubular joints CJP WPS application to PJP joint need to verify with three macro etch specimens as per AWS D1.1. Cl 4.10.3

On Sat, Feb 25, 2012 at 11:43 AM, Chinnappa rao Basuthkar <cbnavigator@gmail.com> wrote:

Dear Members

Is any body have qualfied WPS and PQR for reference purpose only for FCAW as per AWS D1.1 for the thickeness of material from 25 mm to 50mm.

If the WPS is qualifed for CJP ( Complete Joint Penetraion) is it going to qualify for for PJP ( Partial joint penetraion ) and Filler welds also.

Regards

Chinnappa Rao Basuthakr

On Mon, Jul 18, 2011 at 1:49 AM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:

if nothing is mentioned for gas, it is understood that it is usable in full CO2 /Ar+co mixture

On Wed, Jul 13, 2011 at 7:12 PM, arvinda shan <arvindashan@gmail.com> wrote:

Dear Experts,

I need some clarification in document review. PQR qualified in FCAW process for 27 mm plate in 3G position. WPS is prepared for structural joint for 34 mm in all positions.What is the essential one?

In FCAW proces PQR , Electrode AWS no. E71-T-1C is used. But in WPS E71-T-1 is mentioned. Whether its ok?

PQR in FCAW qualifies 3G position of 27mm plates as per ASME SEc.IX and API-650. What is qualification of position in WPS for 3G whether its ALL POSITION or only 3G postion?

The WPS is to be used for structural activies. ie. as per AWS D1.1. But in WPS also mentioned reference code as ASME sec.IX and AWS D1.1.

Plz clarify.

Thanks

Arvinda.

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--
Thanking you

With best regards
Rao

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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.

Thanks & regards,

K.Babu

Re: [MW:13781] Clarification of PQR/WPS in FCAW process

Dear Members

Is any body have qualfied WPS and PQR for reference purpose only for FCAW as per AWS D1.1 for the thickeness of material from 25 mm to 50mm.

If the WPS is qualifed for CJP ( Complete Joint Penetraion) is it going to qualify for for PJP ( Partial joint penetraion ) and Filler welds also.

Regards

Chinnappa Rao Basuthakr

On Mon, Jul 18, 2011 at 1:49 AM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:

if nothing is mentioned for gas, it is understood that it is usable in full CO2 /Ar+co mixture

On Wed, Jul 13, 2011 at 7:12 PM, arvinda shan <arvindashan@gmail.com> wrote:

Dear Experts,

I need some clarification in document review. PQR qualified in FCAW process for 27 mm plate in 3G position. WPS is prepared for structural joint for 34 mm in all positions.What is the essential one?

In FCAW proces PQR , Electrode AWS no. E71-T-1C is used. But in WPS E71-T-1 is mentioned. Whether its ok?

PQR in FCAW qualifies 3G position of 27mm plates as per ASME SEc.IX and API-650. What is qualification of position in WPS for 3G whether its ALL POSITION or only 3G postion?

The WPS is to be used for structural activies. ie. as per AWS D1.1. But in WPS also mentioned reference code as ASME sec.IX and AWS D1.1.

Plz clarify.

Thanks

Arvinda.

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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.

--
Thanking you

With best regards
Rao

Re: [MW:13780] SS welding with SAW

Hi !

To get good Impact properties in SS weld you should

i) Flux should be of basic nature having bsisity bet 3-3.5

ii)Interpass should be max 150C

iii) No preheating for SS

iv) Adjust current Voltage and SAw speed to get bead height not more than 2.5mm

Try to cool the weld as fast as possible

Regards

Hegde P.B.

--- On Fri, 24/2/12, pawan <pawan.tiwari@dwekam.org> wrote:

From: pawan <pawan.tiwari@dwekam.org>
Subject: [MW:13776] SS welding with SAW
To: materials-welding@googlegroups.com
Date: Friday, 24 February, 2012, 4:37 PM

Dear Experts,
Could anyone suggest me about the followings for stainless steel SAW welding to reach >0.38mm %LE at -196deg. cen.

Limitation of wire composition for ER308L grade wire.

SAW welding parameters. (A/V/Speed)

Preheating & Heat input for more than 50mm thick plate.

Any other special requirement.

Rgd
Pawan Tiwari

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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:13777] Ferrite Number.....

Dear Experts,

During Ferrite check on the strip cladding, we noticed FN as 1.5, 2, 2.5 whereas project specn requires 3 to 10.

These low FN is noticed near the cirseam joints in the vessel. May be the first or last pass of strip cladding when strip cladding is done in each shell.

Please send me some info about root cause, remedial action that is to be taken and reference to code/specn.

With regards,
Govi.

[MW:13778] Why constant Current (power source) used for Multi wire SAW

Respected All,
Generally continuous electrode wire welding is recommended to use with
constant voltage (CV) power source characteristic i.e. GMAW ,FCAW and
single wire SAW.

For multi wire SAW instead of CV mode why constant current (CC) power
source characteristic is recommended ???
what will be the effect on welding if we use CV mode for multi wire
SAW.

Regards.

Friday, February 24, 2012

Re: [MW:13778] THK calculation on grid size

As per my opinion..they want to take avg of thickness for defined grid size rather taking a spot measurement..
Logic behind must be a limitation of mfgg to give uniform thickness throught the cross section in complete length..but this will be in benifit to u..

On Feb 22, 2012 12:45 PM, "khatri ankit" <nids01dme011@gmail.com> wrote:

Dear Experts,

In NPCIL project specification for seamless Alloy steel
fittings,following sentence will be given as

- Minimum thk will be calculated on grid size minimum 30mm for up to
50NB & 50mm for up to 500NB & 100mm for above size.

I never heard about this,

I want some information regarding this matter.

Kindly share ur thoughts about this topic and give some referances

regards,

Ankit Khatri

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[MW:13776] SS welding with SAW

Dear Experts,
Could anyone suggest me about the followings for stainless steel SAW welding to reach >0.38mm %LE at -196deg. cen.

Limitation of wire composition for ER308L grade wire.
SAW welding parameters. (A/V/Speed)
Preheating & Heat input for more than 50mm thick plate.
Any other special requirement.

Rgd

Pawan Tiwari

Re: [MW:13775] Bevel end preparation for butt weld

Dear Harsha,

In ASME B 16.25 , The SECTION 1.Scope PARA 1.1 General and 1.2 Application clearly states where and how this standard is applicable,

hope you could read through and clarify.

Regards,

On Wed, Feb 15, 2012 at 6:24 PM, harsha bhat <harshnb@gmail.com> wrote:

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.

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[MW:13774] Arc time for Robotic MIG Welding

Hi,

Can anyone suggest about arc time using different wire dia for Robotic MIG Welding ?

Thanks in advance,

Joy Pal

Wednesday, February 22, 2012

RE: [MW:13773] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

--- On Wed, 22/2/12, Prakash Hegde <pb.hegde@yahoo.com> wrote:

Dear Sir,

I fully agree that Inconel 625 (EQNiCrMo3) we can achieve with two layers and Not with single layer of total weld overlay thickness of 7mm By ESSC process with proper magnetic stirring device adjustment and we can generally get undiluted chemistry at 5-6mm from base line(Particularly of Fe less than 5%

Regards

Hegde P.B.

Fabtech Projects and engrs

Pune (India)

--- On Wed, 22/2/12, Budi Witjaksono <budi.witjaksono@profab-group.com> wrote:

From: Budi Witjaksono <budi.witjaksono@profab-group.com>
Subject: RE: [MW:13769] Acceptance Criteria For Chemical Contents Inconel 625 Overlay
To: "pgoswami" <pgoswami@quickclic.net>, "rinshad abdul rahman" <rinshad043@gmail.com>
Cc: materials-welding@googlegroups.com
Date: Wednesday, 22 February, 2012, 12:08 PM

Dear Mr. Goswami,

Sorry for the late respond due to my current assignment.
There is no client specification for this except they only specified inconel 625 overlay 3 mm thickness.
We have done experiments with ESSC using single pass (4.5 mm height) and the 2 layers (9mm height).
The following is results at the various location.

Profab 1^st Testing (taken 1.5 mm from the surface) Overlay thickness 4.5 mm

Profab 2nd Testing (taken 0.5 mm below surface) Overlay thickness 4.5 mm

Profab 3rd Testing (take 4mm below surface Overlay thickness 4.5 mm

0.024

0.022

0.016

0.38

0.32

0.27

0.39

0.33

0.46

19.1

19.3

22.4

56.7

58.6

62.3

7.74

7.86

9.45

2.23

2.12

2.46

12.5

10.4

1.53

0.026

0.024

0.014

0.014

0.014

0.015

0.006

0.006

0.006

0.004

0.005

0.005

0.022

0.023

0.025

From the above testing we can conclude that impossible to have Inconel 625 with single layer overlay.
The purpose of the Inconel 625 cladding for this project is for bearing seating surface for subsea service.

Do you have any reference on welding with ESSC single layer and pass the chemical requirements of Inconel 625?
Please find attached page from ESAB catalogue for strip cladding which specify that they can only comply with Inconel 625 if they do 2 layer of ESSC.

Regards,

Budi Witjaksono
Project Manager
Phone: +62 778 413 250 ext: 125
Mobile: +62 811 770 5039
Fax: +62 778 413 260
Email: budi.witjaksono@profab-group.com
Website: www.profab-group.com

From: pgoswami [mailto:pgoswami@quickclic.net]
Sent: Friday, February 17, 2012 11:02 AM
To: 'rinshad abdul rahman'
Cc: Budi Witjaksono; materials-welding@googlegroups.com
Subject: RE: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

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................?

Error! Filename not specified.

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

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Materials & Welding

Wednesday, February 29, 2012

[MW:13797] CSWIP 3.1 To AWS-CWI bridging exam

RE: [MW:13793] effect of SOOT formation on base material

Re: [MW:13794] Weld-O-Let fillet size

Tuesday, February 28, 2012

Re: [MW:13795] BASE METAL THK. RANGE AS PER ASME SEC. IX.

[MW:13796] FW: 13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.

[MW:13792] BASE METAL THK. RANGE AS PER ASME SEC. IX.

Re: [MW:13791] Details about lateral expansion in impact testing.

[MW:13790] Details about lateral expansion in impact testing.

Monday, February 27, 2012

[MW:13789] effect of SOOT formation on base material

Re: [MW:13787] Ferrite Number.....

[MW:13788] Re: Weld-O-Let fillet size

RE: [MW:13786] RE: 13168] Low Hydrogen Electrode in Steel Structure Application

Sunday, February 26, 2012

Re: [MW:13784] RE: 13168] Low Hydrogen Electrode in Steel Structure Application

[MW:13783] RE: 13778] Why constant Current (power source) used for Multi wire SAW

Saturday, February 25, 2012

[MW:13784] Weld-O-Let fillet size

Re: [MW:13782] Clarification of PQR/WPS in FCAW process

Re: [MW:13781] Clarification of PQR/WPS in FCAW process

Re: [MW:13780] SS welding with SAW

[MW:13777] Ferrite Number.....

[MW:13778] Why constant Current (power source) used for Multi wire SAW

Friday, February 24, 2012

Re: [MW:13778] THK calculation on grid size

[MW:13776] SS welding with SAW

Re: [MW:13775] Bevel end preparation for butt weld

[MW:13774] Arc time for Robotic MIG Welding

Wednesday, February 22, 2012

RE: [MW:13773] Acceptance Criteria For Chemical Contents Inconel 625 Overlay

[MW:35346] Cast-iron welding

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