Materials & Welding: January 2010

Sunday, January 31, 2010

[MW:4167] DFT measurement

How to measure DFT of paint coating painted on Fireproofed surface or concrete surface?

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[MW:4166] what is SR and how it is done

what is stress relieving in welding, why it is done and can anybody
explain the sr graph, parameters like holding temperature, holding
time,etc. sr is done in same way for preheat and post heat?

thanks

Saturday, January 30, 2010

Re: FW: [MW:4165] Underclad cracking tests

Dear Nautiyal,

Hydrogen disbonding test is conducted as per ASTM G146. After cladding LAS with required WOL(SASC 309L(cb) +347L in your case) the specimenn is prepared as mentioned in G146 & Ultrasonically tested. The test is conducted by Mettalurgical Lab in Mumbai in India and take 10days approx.

amarjit Singh

On 1/29/10, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com> wrote:

Dear Sir

We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D.
First layer is by 309L(Cb) and subsequent layers by 347L.

For this it has been specified that Weld specimen for Reheat cracking should be prepared.
The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography.

We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standard is mentioned )

I just needed more detailed information / procedure..

Regards

Prem Nautiyal

On Fri, 29 Jan 2010 08:46:28 +0530 wrote

>

>
>

Hi Prem,

Could you be more specific about your query:-

· Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.

· Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.

However underclad hydrogen cracking is a bit different issue. Typically it's commonly performed as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.

Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.

Thanks

Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax:(519) 587-6814
Email-pradip.goswami@opg.com.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
>Sent: Wednesday, January 27, 2010 1:20 PM
>To: materials-welding@googlegroups.com
>Subject: *****SPAM***** [MW:4160] Underclad cracking tests

Dear All
>
>Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---

>1)Weld specimen for reheat cracking.
>2)weld specimen for Hydrogen induced cracking.

>The job is a PV, code of construction is ASME Sec III, NB.
>
>Regards
>
>Prem Nautiyal
>
>PREM S NAUTIYAL
>CELL : 9820313278

--
>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.

>
THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
>

--
>
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.
>

PREM S NAUTIYAL
CELL : 9820313278

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Amarjit Singh

Friday, January 29, 2010

Re: Re: FW: [MW:4164] Underclad cracking tests

Dear Sir

I would like to add that the weld specimen for Reheat cracking has to undergo simulated PWHT before the clad is removed ..

Regards

Prem Nautiyal

On Fri, 29 Jan 2010 20:07:13 +0530 wrote
>Dear Sir
>

>
We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D.
>
First layer is by 309L(Cb) and subsequent layers by 347L.
>

>
For this it has been specified that Weld specimen for Reheat cracking should be prepared.
>
The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography.
>

>
We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standard is mentioned )
>

>
I just needed more detailed information / procedure..
>

>
Regards
>

>
Prem Nautiyal
>

>
On Fri, 29 Jan 2010 08:46:28 +0530 wrote
>
>
>

>
>
>
>
>

>
Hi Prem,
>

>
Could you be more specific about your query:-
>

>
· Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.
>

>
· Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.
>

>
However underclad hydrogen cracking is a bit different issue. Typically it's commonly performed as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.
>

>
Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.
>

>
Thanks
>

>

>
Pradip Goswami,P.Eng
>
Senior Engineer/Specialist(Welding-Metallurgy)
>
Engineering & Training Services Division
>
ONTARIO POWER GENERATION Inc.
>
PO Box-2000, RR-55(South)
>
Nanticoke, Ontario,N0A1L0
>
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
>
(416) 231-4111, Ext 5925--in Kipling,Toronto
>
Fax:(519) 587-6814
>
Email-pradip.goswami@opg.com.
>

>

>

>

>
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
>
>Sent: Wednesday, January 27, 2010 1:20 PM
>
>To: materials-welding@googlegroups.com
>
>Subject: *****SPAM***** [MW:4160] Underclad cracking tests
>

>
Dear All
>
>
>
>Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---
>

>
>1)Weld specimen for reheat cracking.
>
>2)weld specimen for Hydrogen induced cracking.
>

>
>The job is a PV, code of construction is ASME Sec III, NB.
>
>
>
>Regards
>
>
>
>Prem Nautiyal
>
>
>
>PREM S NAUTIYAL
>
>CELL : 9820313278
>

>

>

>

>

>
--
>
>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.
>

>

>

>

>
>
>
THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
>
>
>

>

>

>

>
--
>
>
>
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.
>
>
>
PREM S NAUTIYAL
>
CELL : 9820313278

PREM S NAUTIYAL
CELL : 9820313278

Re: FW: [MW:4163] Underclad cracking tests

Dear Sir

We have to deposit min. 6mm overlay by SASC on LAS - shell & Dish end I.D.
First layer is by 309L(Cb) and subsequent layers by 347L.

For this it has been specified that Weld specimen for Reheat cracking should be prepared.
The procedure is : do cladding by SASC with high heat input,remove the clad till weld fusion layer is exposed and conduct MPI + Metallography.

We have been told that Hydrogen induced cracking should be checked by welding a 50mm width overlay with E9018G on LAS with low heat input, kept at room temperature for 8-10 days... ( No reference standard is mentioned )

I just needed more detailed information / procedure..

Regards

Prem Nautiyal

On Fri, 29 Jan 2010 08:46:28 +0530 wrote
>

>
>

Hi Prem,

Could you be more specific about your query:-

· Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.

· Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.

However underclad hydrogen cracking is a bit different issue. Typically it's commonly performed as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.

Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.

Thanks

Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax:(519) 587-6814
Email-pradip.goswami@opg.com.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
>Sent: Wednesday, January 27, 2010 1:20 PM
>To: materials-welding@googlegroups.com
>Subject: *****SPAM***** [MW:4160] Underclad cracking tests

Dear All
>
>Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---

>1)Weld specimen for reheat cracking.
>2)weld specimen for Hydrogen induced cracking.

>The job is a PV, code of construction is ASME Sec III, NB.
>
>Regards
>
>Prem Nautiyal
>
>PREM S NAUTIYAL
>CELL : 9820313278

--
>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.

>
THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
>

--
>
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.
>

PREM S NAUTIYAL
CELL : 9820313278

FW: [MW:4161] Underclad cracking tests

Hi Prem,

Could you be more specific about your query:-

· Underclad Cracking Test— is it related to SAW strip cladding of S.S / Inconel on Reactor Pressure Vessels (RPV) shells. What kind of reheat cracking tests you have to do? Usually reheat cracking is very difficult to simulate.

· Regarding hydrogen cracking, there are standard tests developed and adopted by the industry. If you are familiar with Tekken Y-Grove test, it's a very popular test for hydrogen cracking. What's the test you're asked to perform in this case.

However underclad hydrogen cracking is a bit different issue. Typically it's commonly performed as autoclave testing, and ASTM –G-146, is the standard followed for this underclad hydrogen disbanding test.

Due to copyright issue, I can not post the ASTM standard. However the attached article tells clearly how this test is performed.

Thanks

Pradip Goswami,P.Eng

Senior Engineer/Specialist(Welding-Metallurgy)

Engineering & Training Services Division

ONTARIO POWER GENERATION Inc.

PO Box-2000, RR-55(South)

Nanticoke, Ontario,N0A1L0

Tel:-(519) 587-2201, Ext 3107--in Nanticoke

(416) 231-4111, Ext 5925--in Kipling,Toronto

Fax: (519) 587-6814

Email-pradip.goswami@opg.com.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Wednesday, January 27, 2010 1:20 PM
To: materials-welding@googlegroups.com
Subject: *****SPAM***** [MW:4160] Underclad cracking tests

Dear All

Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---

1)Weld specimen for reheat cracking.
2)weld specimen for Hydrogen induced cracking.

The job is a PV, code of construction is ASME Sec III, NB.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.

Thursday, January 28, 2010

[MW:4162] RE: 4159] Sulfur prints

Please see the attached or the following web site

http://www.astm.org/Standards/E1180.htm

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Wednesday, January 27, 2010 12:12 PM
To: materials-welding@googlegroups.com
Subject: [MW:4159] Sulfur prints

Dear All

Can anyone explain what is meant by Sulfur prints ( BAUMANN PRINTS )??
How to check it..
It is related to a PV.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Re: [MW:4158] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

Dear Nandesh,

As Per Table - A1, A333gr.6 is exempted from impact testing until -45 Deg.

How there could be an impact requirement @ -21 Deg.C.

Can you please clarify.
Thanks and Best regards,

K.Rajagopal

On Thu, Jan 28, 2010 at 9:08 AM, Nandesh Kumar <nandeshkumar@rocketmail.com> wrote:

Dear Mr. Pradeep,

Yes you are right. Please throw some more light on this issue

Material : ASTM A333 Gr. 6

Design code : ASTM B31.3

Service : LNG line

Impact requirement : yes @ -21° C

Thanks for the suggestions.

Nandesh

--- On Wed, 27/1/10, pgoswami <pgoswami@quickclic.net> wrote:

From: pgoswami <pgoswami@quickclic.net>
Subject: [MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT?
To: materials-welding@googlegroups.com
Date: Wednesday, 27 January, 2010, 3:48 AM

Nandesh,

Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾" or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code.

If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?.

If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design temperature more comprehensive answers could be provided.

Thanks

Pradip Goswami, P.Eng

88,Garth Trails Crescent
Hamilton,Ontario, L9B2X1,Canada
Email-pgoswami@sympatico.ca
Email-pgoswami@quickclic.net

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandra, Vasanthan (Lagos)
Sent: Tuesday, January 26, 2010 5:19 AM
To: materials-welding@googlegroups.com
Subject: [MW:4151] RE: 4150] ASME SEC IX...PWHT?

Nandesh,

PWHT requirement is to be cross referred in line with Construction/Design code. In your mail, the applicable design code is missing. However, assuming the design code as B31.3 (2008) for piping, PWHT is mandatory for a thickness >20mm.

Regards,
Vasanth

From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Nandesh Kumar
Sent: 26 January 2010 10:33
To: materials-welding@googlegroups.com
Subject: [MW:4150] ASME SEC IX...PWHT?

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

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*** WORLEYPARSONS GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email in error, please notify us immediately by return email and delete the email and any attachments. Any personal views or opinions expressed by the writer may not necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."
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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:4157] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

Dear Mr. Pradeep,

Yes you are right. Please throw some more light on this issue

Material : ASTM A333 Gr. 6

Design code : ASTM B31.3

Service : LNG line

Impact requirement : yes @ -21° C

Thanks for the suggestions.

Nandesh

--- On Wed, 27/1/10, pgoswami <pgoswami@quickclic.net> wrote:

From: pgoswami <pgoswami@quickclic.net>
Subject: [MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT?
To: materials-welding@googlegroups.com
Date: Wednesday, 27 January, 2010, 3:48 AM

Nandesh,

Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾" or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code.

If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?.

If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design temperature more comprehensive answers could be provided.

Thanks

Pradip Goswami, P.Eng

88,Garth Trails Crescent
Hamilton,Ontario, L9B2X1,Canada
Email-pgoswami@sympatico.ca
Email-pgoswami@quickclic.net

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandra, Vasanthan (Lagos)
Sent: Tuesday, January 26, 2010 5:19 AM
To: materials-welding@googlegroups.com
Subject: [MW:4151] RE: 4150] ASME SEC IX...PWHT?

Nandesh,

PWHT requirement is to be cross referred in line with Construction/Design code. In your mail, the applicable design code is missing. However, assuming the design code as B31.3 (2008) for piping, PWHT is mandatory for a thickness >20mm.

Regards,
Vasanth

From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Nandesh Kumar
Sent: 26 January 2010 10:33
To: materials-welding@googlegroups.com
Subject: [MW:4150] ASME SEC IX...PWHT?

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.
--
To post to this group, send email to materials-welding@googlegroups.com
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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.

*** WORLEYPARSONS GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email in error, please notify us immediately by return email and delete the email and any attachments. Any personal views or opinions expressed by the writer may not necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."
--
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.

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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
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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.

Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

Wednesday, January 27, 2010

[MW:4160] Underclad cracking tests

Dear All

Can anyone provide some article / explanation / detailed procedure about how to prepare specimens and conduct test for the following Underclad cracking test ---
1)Weld specimen for reheat cracking.
2)weld specimen for Hydrogen induced cracking
The job is a PV, code of construction is ASME Sec III, NB.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

[MW:4159] Sulfur prints

Dear All

Can anyone explain what is meant by Sulfur prints ( BAUMANN PRINTS )??
How to check it..
It is related to a PV.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

[MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

Nandesh,

Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾” or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code.

If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?.

If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design temperature more comprehensive answers could be provided.

Thanks

Pradip Goswami, P.Eng

88,Garth Trails Crescent

Hamilton,Ontario, L9B2X1,Canada

Email-pgoswami@sympatico.ca

Email-pgoswami@quickclic.net

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandra, Vasanthan (Lagos)
Sent: Tuesday, January 26, 2010 5:19 AM
To: materials-welding@googlegroups.com
Subject: [MW:4151] RE: 4150] ASME SEC IX...PWHT?

Nandesh,

PWHT requirement is to be cross referred in line with Construction/Design code. In your mail, the applicable design code is missing. However, assuming the design code as B31.3 (2008) for piping, PWHT is mandatory for a thickness >20mm.

Regards,
Vasanth

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Nandesh Kumar
Sent: 26 January 2010 10:33
To: materials-welding@googlegroups.com
Subject: [MW:4150] ASME SEC IX...PWHT?

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

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[MW:4154] enclosed arc welding

Dear all

does anybody have know information or refrences about enclosed arc welding & narrow gap welding with covered electrode especially in rail industry?

regard advances.

Tuesday, January 26, 2010

Re: [MW:4155] ASME SEC IX...PWHT?

Hi Nandesh,

For PWHT requirement detail is not given in ASME Sec IX, it is required based on construction code and Client specification.

As per ASME B31.3 , generally PWHT required for A333 Gr.6 is above 20 mm thk, but based on service fluid it will be higher requirement than code.

In my previous shell project some services requirement is 100%.

Louis

Singapore

--- On Tue, 26/1/10, Nandesh Kumar <nandeshkumar@rocketmail.com> wrote:

From: Nandesh Kumar <nandeshkumar@rocketmail.com>
Subject: [MW:4150] ASME SEC IX...PWHT?
To: materials-welding@googlegroups.com
Date: Tuesday, 26 January, 2010, 3:03 PM

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

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[MW:4153] Fillet weld qualification in 2F position for SAW process.

Dear All,

I have a requirement to qualify a welder in 2F position for SAW process.

I have referred the test requirement in QW 542.5 of ASME Sec.IX.

For fillet weld qualification, test coupon thickness is given up to 10 mm only.

For SAW Qualification in 2F, shall i use plate thickness higher than 10mm?

Is there any reference/limitations for plate thickness in Sec.IX?

Pl. provide your valuable suggestions.

regards
P.Rao

Re: [MW:4152] ASME SEC IX...PWHT?

ASME IX is not a code that can determine the PWHT, you must use a code of construction like being ASME B31.3 or ASME VIII. Soon you must determine N° P and the group that ASTM A333 corresponds, since there are different considerations for what has been said

Ruscitto

>>> Nandesh Kumar <nandeshkumar@rocketmail.com> 26/01/2010 06:33 am >>>

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

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[MW:4151] RE: 4150] ASME SEC IX...PWHT?

Nandesh,

Regards,
Vasanth

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

[MW:4150] ASME SEC IX...PWHT?

Dear All,

For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW.

Material is ASTM A333 .

Thaks in advance

Nandesh Kumar A

Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

[MW:4149] SAW PROCESS and FCAW backing question

Mr. Asghari,

The most influential variable in the SAW process is Arc Voltage (Arc Length). As voltage is increased, flux consumption increases.

If your Procedure utilizes an active flux (one that is relatively high in silicon, manganese or perhaps even chromium), weld chemistry can be influenced detrimentally especially in multipass welding. For example, the silica tends to break down in the heat of the arc and can introduce adverse amounts of oxygen to the weld metal.

If you are using an alloying flux to recover alloy elements, voltage can significantly affect the amount of elements picked up through the rate of flux consumption. Follow Manufacturers recommendations closely to obtain desired chemistry.

The reason FCAW requires backing is due to the fluidity of the FCAW puddle.

Thanks,

Darcy Morin

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ali Asghari
Sent: January-25-10 10:40 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4147] FW: 4106] essentials about SAW PROCESS

Dear Goswami

thank you for reply.

but my intention of question is :when the composition of weld metal is dependent to flux,which welding parameters affect on amount of alloying elements in weld metal?

regards

From: pgoswami <pgoswami@quickclic.net>
To: materials-welding@googlegroups.com
Sent: Sun, February 21, 2010 3:04:18 AM
Subject: [MW:4116] FW: 4106] essentials about SAW PROCESS

Mr Asghari,

Both QW-404.10 & 404.27 applies to procedure qualification by SAW and are essential variables. In SAW , one can do the alloying through flux only, or though wire or through flux and wire combined.

You may be aware that SAW fluxes are manufactured (briefly without going into details) as acidic flux, basic (agglomerated, bonded or fused) or neutral fluxes. Each flux behaves differently during welding. Due to these factors SAW flux is so important and fabricator has to know precisely the AWS classification as mentioned in SFA -5.23 or SFA 5.17 as provided by consumable manufacturer.

QW 404.10- Where the alloy content of the weld metal is very much dependent upon the composition of the flux used, any change in any part of the welding procedure may result in the important alloying elements in the weld metal being outside of the specification range given in the Welding Procedure Specification. If the production welds are not being made in accordance with the procedure specification, the authorized inspector may require that a check be made on the chemical composition of the weld metal on a production weld.

QW-404.27— Where the alloy content of the weld metal is largely dependent upon the composition of the supplemental filler metal or any other form of additive, such as alloy powder. This changes weld metal chemistry thus deemed as essential variable as per ASME Sec-IX.

Regarding your earlier queries:-

· what is effect of filler composition in transfer mode in GMAW?—None, transfer mode is a function of, wire size, shielding gas and Polarity/ Arc Current.

· why backing material is required for FCAW for root pass?—FCAW is not meant to be a full penetration weld , unless some improved and special power source is used, such as STT.

Hope I have tried to clear your doubts. I am attaching an e-book on SAW for your reference.

Thanks

Pradip Goswami,P.Eng ,IWE

Senior Engineer/Specialist(Welding-Metallurgy)

Machine Dynamics & Component Integrity Dept.

Engineering & Training Services Division

ONTARIO POWER GENERATION Inc.

PO Box-2000, RR-55(South)

Nanticoke, Ontario,N0A1L0

Tel:-(519) 587-2201, Ext 3107--in Nanticoke

(416) 231-4111, Ext 5925--in Kipling,Toronto

Fax: (519) 587-6814

Email-pradip.goswami@opg.com.

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ali asghari
Sent: Wednesday, January 20, 2010 5:35 AM
To: materials-welding@googlegroups.com
Subject: [MW:4106] essentials about SAW PROCESS

Dear all

does anybody have experiences or interpretations about

QW 404.10 & 404.27(the alloy content of the weld metal is largely dependent(how can assess) upon the composition of the flux used, any change in any part of the welding procedure which would result in the important alloying elements in the weld)

QW 404.24:10% VOLUME IN TOTAL LENTGH OR NOT?

REGARD ADVANCES.

Materials & Welding

Sunday, January 31, 2010

[MW:4167] DFT measurement

[MW:4166] what is SR and how it is done

Saturday, January 30, 2010

Re: FW: [MW:4165] Underclad cracking tests

Friday, January 29, 2010

Re: Re: FW: [MW:4164] Underclad cracking tests

Re: FW: [MW:4163] Underclad cracking tests

FW: [MW:4161] Underclad cracking tests

Thursday, January 28, 2010

[MW:4162] RE: 4159] Sulfur prints

Re: [MW:4158] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

Re: [MW:4157] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

Wednesday, January 27, 2010

[MW:4160] Underclad cracking tests

[MW:4159] Sulfur prints

[MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT?

[MW:4154] enclosed arc welding

Tuesday, January 26, 2010

Re: [MW:4155] ASME SEC IX...PWHT?

[MW:4153] Fillet weld qualification in 2F position for SAW process.

Re: [MW:4152] ASME SEC IX...PWHT?

[MW:4151] RE: 4150] ASME SEC IX...PWHT?

[MW:4150] ASME SEC IX...PWHT?

[MW:4149] SAW PROCESS and FCAW backing question

[MW:34866] Presentation for WPS ,PQR AND WPQ as per ASME Sec IX in power point

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