Materials & Welding: June 2012

Saturday, June 30, 2012

Re: [MW:14730] Asymmetric fillet weld

Mr. Joy Pal,

a. General considerations is to have fillet size with respect to plate material thickness.

b. If it is a load bearing structure, the fillet size could be 3/4 (0.75) of the base metal thickness.

c. If it is a non-load bearing structure, the fillet size could be 3/8 (0.375 -or- 0.38) of the base metal

thickness.

d. Hence, your 6X14 will represent the asymmetrical thickness of base/parent metal.

e. It could have been more better if the sketch has shown sections of a/a and b/b giving about actual

thickness of the material used.

sridhar.

From: Joy Pal <joypal79@gmail.com>
To: materials-welding@googlegroups.com
Sent: Thursday, 28 June 2012 10:19 PM
Subject: [MW:14717] Asymmetric fillet weld

Hi,

I would like to know what weld size we should consider for Asymmetric fillet weld (a fillet weld where the legs are of unequal length). Please look at the attached file and let me know the weld size for ( 6 X 14 ) Fillet during welding at shop.

( 6 X 14 ) , is for example only , in reality it could be any uneven size like (... X ... ). Let me know if there is any standard procedure / thumb rule to consider the fillet weld size for this type of asymmetric callout.

Don't consider it may come as a welding process defect. It is from actual fabrication job and for illustrative purpose only.

Thanks in advance,

Joy
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[MW:14729] Information regarding IWS.IWT courses

Dear Experts,

I need information regarding IWS.IWT courses . Which institute offers in India & also in Middle East ? what is the mode of learning of this course ?

Please advise.

Thanks & regards.

ABHISHEK GHOSH

Kuwait

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Re: [MW:14725] carburization of furnace tubes

Consult an Eddy current Testing guy, may be it will help.

--- On Sat, 30/6/12, ags 36681 <ags1280@gmail.com> wrote:

From: ags 36681 <ags1280@gmail.com>
Subject: [MW:14724] carburization of furnace tubes
To: "materials-welding" <materials-welding@googlegroups.com>
Date: Saturday, 30 June, 2012, 6:54 PM

Dear friends,

we recently changed the ethane furnace tubes after service in 4 years,
now we are planning to segregate the healthy tubes & return bends
from used/removed lot to re-use in future if needed. Material of the
tube/bend is 25Cr/35Ni/Nb+Micro.

We can check visually for cracks, thinning, bowing etc. UT is not
feasible, because there is some sort of rough coating over it.

How about the field metallography for carburization?

thanks a lot to all dear friends.

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[MW:14724] carburization of furnace tubes

Dear friends,

we recently changed the ethane furnace tubes after service in 4 years,
now we are planning to segregate the healthy tubes & return bends
from used/removed lot to re-use in future if needed. Material of the
tube/bend is 25Cr/35Ni/Nb+Micro.

We can check visually for cracks, thinning, bowing etc. UT is not
feasible, because there is some sort of rough coating over it.

How about the field metallography for carburization?

thanks a lot to all dear friends.

--
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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.

Friday, June 29, 2012

[MW:14723] Re: User acceptance of 45° Elbows

Where are you carrying out the inspection -- is it at the supplier's shop?

They would normally have two plates joined at right angles and machined accurate for angle and flatness.

The elbow with one of its ends is placed on the horizontal plate and the other end is made to meet the vertical plate's inner face.

Now you can actually measure or use sizewise pre-marked lines (on both the faces) to see the centre to end distance, i.e. like a gauge. This also makes it possible to check the squareness of the end.

However, it has its own limitations of weight, mobility, size range, wear & tear, corrosion and such other things.

If anybody knows any other method, pl. do share.

Regards

On Friday, June 29, 2012 10:05:19 AM UTC+5:30, M. Ali Halai wrote:

Dear Experts,

We are usually engaged in carrying out the user acceptance inspection of various piping and fittings. Out of those, butt weld end elbows are inspected as per ASME B 16.9.

Now particularly the 45° Elbows are very hard to inspect due to the fact that the center to end distance given in the code cannot be easily measured as the elbow cannot stay flat on the ground and rotates according to its center of mass.

One way we discovered was to join two elbows end to end and measuring the face to face and comparing it to the dimensions of 90° Elbow, but still chances of error remain.

Any comments / suggestions are much appreciated.

Regards,

Muhammad Ali

On Friday, June 29, 2012 10:05:19 AM UTC+5:30, M. Ali Halai wrote:

Dear Experts,

We are usually engaged in carrying out the user acceptance inspection of various piping and fittings. Out of those, butt weld end elbows are inspected as per ASME B 16.9.

Now particularly the 45° Elbows are very hard to inspect due to the fact that the center to end distance given in the code cannot be easily measured as the elbow cannot stay flat on the ground and rotates according to its center of mass.

One way we discovered was to join two elbows end to end and measuring the face to face and comparing it to the dimensions of 90° Elbow, but still chances of error remain.

Any comments / suggestions are much appreciated.

Regards,

Muhammad Ali

Re: [MW:14722] ASME Section IX Section QW 403.6

Hi ,

QW 403 and its sections talks about basemetals generally.

If U see , for ex. QW-255 for FCAW welding variables table, under QW 403,

it says Group Number , T Limits , T Qualified , t Pass > 1⁄2 in. (13 mm) , T limits (S. cir. arc) , P-No. qualified.

Hence , we cannot restrict QW 403 and its sections are only for different P Nos.

Cheers,
Saravanan,

Korea

On Fri, Jun 29, 2012 at 3:10 AM, Dark_Horse <srinivas.sreeram@gmail.com> wrote:

Greetings,

Reference : ASME Section IX

Section QW 403 Base Metals
QW 403.1 starts with welding between "Different P-No"
The same holds for almost all of the Sub-Sections of QW 403.

Query
Is it fair to say that the Section 403 and its related sub-sections
speak specific to welding of "DIFFERENT" P.No. ?
If the answer is NO. Then kindly share your perspective on the
same.........................

with regards,
Sreeram

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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:14721] User acceptance of 45° Elbows

Dear Experts,

We are usually engaged in carrying out the user acceptance inspection of various piping and fittings. Out of those, butt weld end elbows are inspected as per ASME B 16.9.

Now particularly the 45° Elbows are very hard to inspect due to the fact that the center to end distance given in the code cannot be easily measured as the elbow cannot stay flat on the ground and rotates according to its center of mass.

One way we discovered was to join two elbows end to end and measuring the face to face and comparing it to the dimensions of 90° Elbow, but still chances of error remain.

Any comments / suggestions are much appreciated.

Regards,

Muhammad Ali

Re: [MW:14720] Explanation of MTLTV ZT-Reg

Hi Friends,

I think ZT means, Z direction Through Thickness tested.

Please clarify again.

Cheers,
Saravanan,

Korea

On Thu, Jun 28, 2012 at 5:57 PM, Kavin Murugam <kavin202082@yahoo.com> wrote:

Dear Venkat,

Kindly refer SA20 ASME Sec II Part A.
MT=Heat treated

LTV=CVN done.
ZT= no idea

Kavin Murugam

0126159644

From: "g.venkatesan06@gmail.com" <g.venkatesan06@gmail.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Thursday, June 28, 2012 2:29 AM
Subject: [MW:14709] Explanation of MTLTV ZT-Reg

Dear sir.
I saw one carbon steel MTC SA 537 CL 1 MTLTV ZT.

What is the explanation of MTLTV ZT.

Which source or code gives that explanation.
Kindly guide me.

Regards
venkat
trichy

----------
Sent from my Nokia phone

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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.

Thursday, June 28, 2012

[MW:14719] ASME Section IX Section QW 403.6

Greetings,

Reference : ASME Section IX

Section QW 403 Base Metals
QW 403.1 starts with welding between "Different P-No"
The same holds for almost all of the Sub-Sections of QW 403.

Query
Is it fair to say that the Section 403 and its related sub-sections
speak specific to welding of "DIFFERENT" P.No. ?
If the answer is NO. Then kindly share your perspective on the
same.........................

with regards,
Sreeram

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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:14718] Re: welding procedure qualification requirement for P No.1 Group no 1,2

Dear Mr. Lalit,

Any change in P nos (or) Group nos requires re qualification as per sec. IX of ASME.

sridhar.

----------------------------------------------------------------------------------------------------------------------

Dear Mr. Subhankar,

Since your P1 Gr.2 is qualified for impact at -48 deg. C then it is qualified for temp. -29 deg C. as the P nos and Group nos are same.

sridhar.

From: Kavin Murugam <kavin202082@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Thursday, 28 June 2012 2:39 PM
Subject: Re: [MW:14713] Re: welding procedure qualification requirement for P No.1 Group no 1,2

Can , The lower the temperature the more its brittle

Regards,

Kavin Murugam

0126159644

From: SUBHANKAR CHAKRABORTY <subh.tinny@gmail.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, June 27, 2012 12:15 PM
Subject: [MW:14701] Re: welding procedure qualification requirement for P No.1 Group no 1,2

Dear Exparts,

CAN ANYBODY EXPLAIN ME IF A PQR P1G2 ~ P1G2 QUALIFIED WITH IMPACT AT -48 DEGREE,IS IT SUPPORT A WPS P1G2 ~ P1G2 WITH IMPACT AT -29?

SUBHANKAR CHAKRABORTY

On Thursday, 21 June 2012 14:17:17 UTC+5:30, LALIT wrote:

Dear expert,

If welding procedure is qualified for the SA 516 Gr.60 to same (P No.1 Group 1 to same), then is it required to conduct another PQR for the SA 516 Gr.70 to same (P No.1 Group 2 to same), if impact requirement is applicable for both material at same temperature?

--

Regards

Lalit Vadadoriya
Sr.Engineer (Inspection)
Engineers India Limited
Dahej Petrochemical Complex,

Dahej (Gujarat)

[MW:14717] Asymmetric fillet weld

Re: [MW:14716] AWS D1.1 WPS qualification range?

1. weld access hole must required prior to start welding as per fig 5.29.

2. CJP WPS can be used for PJP no need special WPS for PJP as per AWS D1.1

BHUVANESH

On 27 June 2012 10:09, cnooc <fzhang007@gmail.com> wrote:

I have several confusions on the use of AWS D1.1,can anyone help me ?

Is weld access holes/beam copes on web mandatory ? or as long as the welder can meet the penetration requirement,the fabricator can do the welding without the weld access hole?
Can i use a CJP WPS(use the same process,parameter...) to weld a PJP weld or filler weld without made a new WPS for PJP welds or filler welds?
Thanks !

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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:14715] Re: Argon gas consumption for GTAW

Dear Mohd

Can you clarify the meaning of sheet names given in excel sheet

Regards

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of mohd
Sent: Saturday, June 23, 2012 9:50 AM
To: materials-welding@googlegroups.com
Subject: [MW:14660] Re: Argon gas consumption for GTAW

Dear Nayan,

Pl find attachment for calculation XL sheet...

Let me know if any querry...

Regards,

Mohd.

On Tuesday, June 19, 2012 7:23:44 AM UTC+3, Nayan wrote:

Dear All,

Actually I would like to know How much the Argon gas require during GTAW welding.

In my plant we are going to weld 45000 different sizes joints. can you tell me that is thre any standard or approx method to measure the consumption of the shielding gas(Ar)

Re: [MW:14714] Preheating Requirements For HOT TAPPING OF LPG PIPE LINES

To prevent HAZ hardness increase & HAZ crack

Regards,

Kavin Murugam

0126159644

From: Mohamed Elsayed ( BTG) <MElsayed@ccc.ae>
To: materials-welding@googlegroups.com
Sent: Tuesday, June 26, 2012 7:41 PM
Subject: [MW:14693] Preheating Requirements For HOT TAPPING OF LPG PIPE LINES

Dear Friends,

Could you please tell me , in Preheating process for Hot tap as per Shell DEP 30.10.60.30-Gen. (WELDING ON PRESSURISED PIPES (AMENDMENTS/SUPPLEMENTS TO ANSI/API RP 1107)) December 1998, Clause 4.8 (b) and (c) PREHEATING AND INTERPASS TEMPERATURE)

why we are increasing the temp. to 250 °C , then decreasing to 150 °C before starting the welding and why the time taken for 250°C to cool to 150 °C shall be recorded

4.8 PREHEATING AND INTERPASS TEMPERATURE

(b) Longitudinal groove welds:

Prior to the commencement of welding, both seams shall be heated simultaneously to 250 °C over a minimum band width of twice the thickness of the fitting either side of the weld preparation. After welding has commenced, the preheat maintenance temperature shall be 150 °C.

With the fitting in position on the live pipeline, a minimum length of 300 mm of the weld zone shall be preheated to 250 °C. The temperature of the run pipe within this zone shall be monitored and the time taken for the zone to cool to 150 °C shall be recorded. This recorded time shall define the time limits between the cessation and the re-commencement of preheat during welding for the deposition of the first two layers of the weld metal including the buttering runs on the run pipe. Thereafter, the temperature shall be monitored so that welding does not occur when the weld zone is at a temperature of less than 150 °C.

Best Regards,

Mohamed El-Sayed

Re: [MW:14713] Re: welding procedure qualification requirement for P No.1 Group no 1,2

Can , The lower the temperature the more its brittle

Regards,

Kavin Murugam

0126159644

Dear Exparts,

CAN ANYBODY EXPLAIN ME IF A PQR P1G2 ~ P1G2 QUALIFIED WITH IMPACT AT -48 DEGREE,IS IT SUPPORT A WPS P1G2 ~ P1G2 WITH IMPACT AT -29?

SUBHANKAR CHAKRABORTY

On Thursday, 21 June 2012 14:17:17 UTC+5:30, LALIT wrote:

Dear expert,

If welding procedure is qualified for the SA 516 Gr.60 to same (P No.1 Group 1 to same), then is it required to conduct another PQR for the SA 516 Gr.70 to same (P No.1 Group 2 to same), if impact requirement is applicable for both material at same temperature?

--

Regards

Lalit Vadadoriya
Sr.Engineer (Inspection)
Engineers India Limited
Dahej Petrochemical Complex,

Dahej (Gujarat)

Re: [MW:14712] Explanation of MTLTV ZT-Reg

Pls. see ASME Sec II Part A : 2010 SA 20 Para 13.1.1, Para 12.1.7 and SA 770 Para 6.

In short: Heat Treated: low temperature Charpy V- notch impact tested: through thickness tension tested

Regards,

From: "g.venkatesan06@gmail.com" <g.venkatesan06@gmail.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: 28-06-2012 13:54
Subject: [MW:14709] Explanation of MTLTV ZT-Reg
Sent by: materials-welding@googlegroups.com

Dear sir. I saw one carbon steel MTC SA 537 CL 1 MTLTV ZT. What is the explanation of MTLTV ZT. Which source or code gives that explanation. Kindly guide me. Regards venkat trichy ---------- Sent from my Nokia phone -- 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 athttp://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:14711] Explanation of MTLTV ZT-Reg

Dear Venkat,

Kindly refer SA20 ASME Sec II Part A.

MT=Heat treated

LTV=CVN done.

ZT= no idea

Kavin Murugam

0126159644

From: "g.venkatesan06@gmail.com" <g.venkatesan06@gmail.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Thursday, June 28, 2012 2:29 AM
Subject: [MW:14709] Explanation of MTLTV ZT-Reg

Dear sir.
I saw one carbon steel MTC SA 537 CL 1 MTLTV ZT.

What is the explanation of MTLTV ZT.

Which source or code gives that explanation.
Kindly guide me.

Regards
venkat
trichy

----------
Sent from my Nokia phone

--
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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:14710] GTAW wires equivalent to AWS E10018-D2 and E 11018M

You can use the following GTAW consumables ER 110S-G. In India you can use Bohler brand.

Regards

Prem Nautiyal

Cell: 9769316004

From: ARC WELDING COMPANY <arcweldingcom@gmail.com>
To: materials-welding@googlegroups.com
Cc: arcweldingcompany@gmail.com
Sent: Wednesday, June 27, 2012 10:56 AM
Subject: [MW:14702] GTAW wires equivalent to AWS E10018-D2 and E 11018M

Dear sir,

Can anybody suggest GTAW consumables equivalent to AWS E10018-D2 and E 11018M?

Thanks and regards,

For Arc Welding Company,

Anil Verma

9999200148

Wednesday, June 27, 2012

[MW:14709] Explanation of MTLTV ZT-Reg

Re: [MW:14708] GTAW wires equivalent to AWS E10018-D2 and E 11018M

as per AWS 5.28 ER 110S-G

Chandrakant Sarvade

09769554718

--- On Wed, 27/6/12, ARC WELDING COMPANY <arcweldingcom@gmail.com> wrote:

From: ARC WELDING COMPANY <arcweldingcom@gmail.com>
Subject: [MW:14702] GTAW wires equivalent to AWS E10018-D2 and E 11018M
To: materials-welding@googlegroups.com
Cc: arcweldingcompany@gmail.com
Date: Wednesday, 27 June, 2012, 5:26 AM

Dear sir,

Can anybody suggest GTAW consumables equivalent to AWS E10018-D2 and E 11018M?

Thanks and regards,

For Arc Welding Company,
Anil Verma
9999200148

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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:14707] suitable electrodes for 40 CR to IS 2062 Gr B

40Cr, is a kind of HSLA.

the suitble electrode for 40Cr is :

1, SMAW: Phoenix SH Ni 2 K 130

2, GMAW: Union X 90

Please log on http://www.t-put.com/ for more details.

Roy

Bohler Welding Group

From: suresh

Sent: Wednesday, June 27, 2012 5:45 PM

To: materials-welding@googlegroups.com

Subject: [MW:14706] suitable electrodes for 40 CR to IS 2062 Gr B

Dear All,

i would like to know physical properties and chemical compositions of 40 CR material.

what is the suitable electrode for 40 CR to IS 2062 G

Thanks and Regards,

Suresh.

[MW:14706] suitable electrodes for 40 CR to IS 2062 Gr B

Dear All,

i would like to know physical properties and chemical compositions of 40 CR material.

what is the suitable electrode for 40 CR to IS 2062 G

Thanks and Regards,

Suresh.

Re: [MW:14705] GTAW wires equivalent to AWS E10018-D2 and E 11018M

Anil,

See e.g. Böhler Welding Guide: http://www.boehler-welding.com/english/files/Weldingguide_ENG.pdf

Possible equivalents for E10018-D2 is BOHLER NiMo 1-IG (page 2-89, similar/same stick is on page 2-82)

and for E 11018M is BOHLER NiCrMo2,5-IG (page 2-90, similar/same stick is on page 2-84).

Regards

Tom

On 2012.06.27., at 7:26, ARC WELDING COMPANY wrote:

Dear sir,
Can anybody suggest GTAW consumables equivalent to AWS E10018-D2 and E 11018M?
Thanks and regards,
For Arc Welding Company,
Anil Verma
9999200148

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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:14704] welding procedure for IS2707GR.3 casting

Dear Experts,

Could any one explain me about welding procedure for welding of IS2707 Gr.3 material (sproket wheel carbon steel casting).

Which electrde to be used ?

how much Preheating & post heating required ? etc.
--

THANKS & REGARDS

KALYAN VVV

WELDING EXECUTIVE ENGINEER

HYDERABAD

[MW:14703] AWS D1.1 WPS qualification range?

I have several confusions on the use of AWS D1.1,can anyone help me ?

Is weld access holes/beam copes on web mandatory ? or as long as the welder can meet the penetration requirement,the fabricator can do the welding without the weld access hole?
Can i use a CJP WPS(use the same process,parameter...) to weld a PJP weld or filler weld without made a new WPS for PJP welds or filler welds?

Thanks !

[MW:14702] GTAW wires equivalent to AWS E10018-D2 and E 11018M

Dear sir,

Can anybody suggest GTAW consumables equivalent to AWS E10018-D2 and E 11018M?

Thanks and regards,

For Arc Welding Company,

Anil Verma

9999200148

[MW:14701] Re: welding procedure qualification requirement for P No.1 Group no 1,2

Dear Exparts,

CAN ANYBODY EXPLAIN ME IF A PQR P1G2 ~ P1G2 QUALIFIED WITH IMPACT AT -48 DEGREE,IS IT SUPPORT A WPS P1G2 ~ P1G2 WITH IMPACT AT -29?

SUBHANKAR CHAKRABORTY

On Thursday, 21 June 2012 14:17:17 UTC+5:30, LALIT wrote:

Dear expert,

If welding procedure is qualified for the SA 516 Gr.60 to same (P No.1 Group 1 to same), then is it required to conduct another PQR for the SA 516 Gr.70 to same (P No.1 Group 2 to same), if impact requirement is applicable for both material at same temperature?

--

Regards

Lalit Vadadoriya
Sr.Engineer (Inspection)
Engineers India Limited
Dahej Petrochemical Complex,

Dahej (Gujarat)

Tuesday, June 26, 2012

Re: [MW:14700] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin

Dear ali
as you mention in your mail welding with 5 cr to ss304,ITS BASED ON THE design Temp.,i in this case you have to follow API 582 , COZ above 315 c you can not used 309 ,for that u should use f43, ER NiCr3

1 you have to do buttering on 5cr
2 pwht
3 ferrite test
4 welding

On Tue, Jun 26, 2012 at 1:31 PM, M. Ali Halai <mali5286@gmail.com> wrote:

Dear All,

We have to weld an Ø1½" SS 304 guide pin pipe to Ø4" 5Cr furnace tube. I was unable to find any WPS in our records. Some research I did revealed that I should be using SS 309 for the welding. What I am concerned is whether Stress relieving is necessary? I learned from somewhere that it will lead to sigma phase creation and carbide percipatation in austenitic stainless steel.

Your comments / help is much appreciated.

Regards,

Muhammad Ali

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Re: [SUSPECTED SPAM] Re: [MW:14699] P1 Material Pipe welding Joints RT and MT before PWHT is Acceptable or not ?

Dear Friends,

I agree with you guys still I would also like to add a piece of info.

Regarding PWHT,

PWHT does not always have a positive effect and can cause distortion and degradation of the micro structure.
PWHT can "open up" indications (due to heat cycle) that might not show by NDT before PWHT.
There is a chance for delayed cracking or post heat treatment cracking may happen in or adjacent to welds after PWHT.

Considering the above reasons NDT is prefered after PWHT to make sure the weld quality

"RT before PWHT" would be an optional additional examination.

If you noticed repair after PWHT, then you need repair and re-PWHT required;to minimise/avoid this situation, NDT before PWHT is preferred.

And As per Shell DEP 30.10.60.18 , Clause 9.1 : NDE for acceptance shall be carried out after final PWHT.

So before coming to a conclusion please refer your project specifications and accordingly.

Thanks,

Nisanth Mohan

On Tue, Jun 26, 2012 at 12:56 PM, Mohamad Shah Gubah ahmad <msgba.resb@gmail.com> wrote:

Hi friends

It is acceptable because your performend before PWHT is not ignore the code reference. This NDT to check any discontinuities ,if any finding you can repair with out PWHT. .Most of the contrctor /company impliment NDT before PWHT because:

1. Check any discontinuities

2. To confirm and remove the minor doscontinuities to ensure it did not contribute or accumulate become major defect

3.to reduce cost of repair better carry out before PWHT

4. To compare any discontinuities sizing before and after pwht

5. If NDT after PWHT,you found non acceptable defect that become very costly for repair.

6.Normally NDT after PWHT check "0 tolerance defect" (crack)

regards

On Mon, Jun 25, 2012 at 9:21 PM, Ramchandra vichare <vicharerke@indiatimes.com> wrote:

----- Original Message -----
From: mpk mpk
To: materials-welding
Sent: Mon, 25 Jun 2012 15:18:08 +0530 (IST)
Subject: [MW:14676] P1 Material Pipe welding Joints RT and MT before PWHT is Acceptable or not ?

Dear friend,

It can be acceptable but, only for internal judgement of workmanship/quality of weld (i.e.to observed any repair etc.) but If your job requirement is heat treatment you must go for RT after Heat treatment eventhough you attend RT or any NDT (as required) before heat treatment & it may be acceptable before heattreatment .

Regards,

RKVichare

Dear experts,

P1
Material Pipe welding Joints RT and MT examination before PWHT is Acceptable or not ?

As per 2010 ASME B.31.3 para 341.3 Examination requirements,

(a) for P.nos 3,4 and 5 materials Examination shall be performed after completion of any heat treatment.

Thank you

YEM.

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Re: [MW:14698] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin

Hi! Friends

generaly it is prefered to use Inconel filler ( NiCrMo3 or NiCr3) for welding 5Cr 1/2 mo to SS materail which needs PWHT at higher Temp. Mostly 309 SS filloer is not recomended when it requires PWHT at Higher temp say 680-700C

Regards

Hegde P.B.
--- On Tue, 26/6/12, ESMAT S <ss824@hotmail.com> wrote:

From: ESMAT S <ss824@hotmail.com>
Subject: Re: [MW:14692] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Cc: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Tuesday, 26 June, 2012, 1:47 PM

I face this problem but with ss316 to p91 (9cr) in steam line and the welding was buttering procedure with the higher grade which is p91(9cr) filler.

Generally the dismiler Welding should be with the higher grade material according to the code .

Sent from my iPhone

On Jun 26, 2012, at 11:06 AM, "M. Ali Halai" <mali5286@gmail.com> wrote:

Dear All,

We have to weld an Ø1½" SS 304 guide pin pipe to Ø4" 5Cr furnace tube. I was unable to find any WPS in our records. Some research I did revealed that I should be using SS 309 for the welding. What I am concerned is whether Stress relieving is necessary? I learned from somewhere that it will lead to sigma phase creation and carbide percipatation in austenitic stainless steel.

Your comments / help is much appreciated.

Regards,

Muhammad Ali

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[MW:14697] Welder & process qualification ASME-IX

Dear Experts

We have client whos is welding a box structure , with one single v joint. Include angle 60 degree , root face 1.5 mm , root run Mig welding. fillup run SAW.

Please let me know the samples required for welder qualification and process qualification and what should be the non- essential variables and non-essential variables.

With Regards

Arijoy Roy

From: Lakine <lakine85@gmail.com>
To: materials-welding@googlegroups.com
Sent: Monday, 25 June 2012 8:13 PM
Subject: [MW:14687] Re: Welder qualification ASME-IX

Raj,

Can we do a test coupon of 1G position and if Rt and other nde passes can he weld 6G position again or he must do a 6G test coupon to renew a 6G Welder qualification.

of course, for renewal welder in ASME IX, they only care welding process. If they use that welding process with his range (process, thickness, diameter), position is not mention here.So, you can renewal it

On Saturday, June 16, 2012 3:21:53 PM UTC+7, raj susi wrote:

Dear experts
Good day.in Asme sec IX for welder qualification-
in my previous company I have seen that they use production weld followed by Rt to qualify a welder, but now in my new company sometimes they are using production weld and sometimes by a welder qualification coupon.
So please tell me whether we can do either way or which is best way or in which condition we should follow any of the 2 ways.
And secondly for renewal of welder qual for 6G position.
Can we do a test coupon of 1G position and if Rt and other nde passes can he weld 6G position again or he must do a 6G test coupon to renew a 6G Welder qualification.
Thanks and regards.
Raj

Re: [MW:14696] Re: LWN flange...............

I think it will create strength issues due to difference in process.

The flanges of 150 and 300 rating come in forged steel and welding the plate with neck will redeuce the joint efficiency i.e it will not remain 100 percent.

Ammar Shaikh

On Mon, Jun 25, 2012 at 7:22 PM, Lakine <lakine85@gmail.com> wrote:

Hi, I think contractor is trying to skip it. Class # 150 & #300 is different working pressure, how can they mean it is the same even the dimension is the same. It they evidence class #150 is satisfied with design, we can approve but they must submit the caculation. So far, you must refer process, working pressure in specification and operation condition to review it. The best way, you still reject except your client accept them. So, it is low risk with you.

Lakin

On Friday, June 22, 2012 7:33:59 PM UTC+7, shanmugam govindarajan wrote:

Dear Experts,

Please clarify the below problem.

Contractor has welded 2" 150# LWN flange with the vessel. Approved drawing requires 2" 300# LWN flange. Contractor proposes to cut and remove the bolting part of the LWN flange and weld with the 300# bolting part of LWN flange. Their intention is not to disturb the vessel and due to tight schedule. But I told them that entire LWNF shall be removed from the vessel and shall be welded with 300# LWNF. Contractor says calculation for both 150# and 300# is same , so there is no problem.

Please clarify whether this is a correct approach.

With regards,

Govi

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Re: [MW:14695] Dissimilar Welding: 5Cr-0.5Mo Furnace Tube with SS304 Guide pin

Dear Mohammad Ali

As per AWS D10.8(RP for Welding of Cr-Mo Steel Piping & Tubing) you can use ENiCrFe-2 or -3 for SMAW process and ERNiCr-3 for GTAW and GMAW process, meanwhile for non-cyclic thermal service up to 600° F (315°C) type E309 or E309Mo stainless steels filer metals frequently used.

Regards,

Himan Nikdin

On Tue, Jun 26, 2012 at 12:47 PM, ESMAT S <ss824@hotmail.com> wrote:

I face this problem but with ss316 to p91 (9cr) in steam line and the welding was buttering procedure with the higher grade which is p91(9cr) filler.

Generally the dismiler Welding should be with the higher grade material according to the code .

Sent from my iPhone

On Jun 26, 2012, at 11:06 AM, "M. Ali Halai" <mali5286@gmail.com> wrote:

Dear All,

We have to weld an Ø1½" SS 304 guide pin pipe to Ø4" 5Cr furnace tube. I was unable to find any WPS in our records. Some research I did revealed that I should be using SS 309 for the welding. What I am concerned is whether Stress relieving is necessary? I learned from somewhere that it will lead to sigma phase creation and carbide percipatation in austenitic stainless steel.

Your comments / help is much appreciated.

Regards,

Muhammad Ali

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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.