PWHT Requirement for dissimilar welding b/w P91 & SS304

[Abhishek Rai]

Dear Sir,

Please confirm the requirement of PWHT b/w welding of P91 & SS 304.the operating temperature of piping is 640 deg c .

[Octane Mac]

B31.3: 704-760 C, minimum holding time 2 hrs. Holding time 1hr/in.

B31.1: 730-775 C, minimum holding time 30 minutes. Holding time 1hr/in. Note: As it is a dissimilar material welding and a nickel based consumable is recommended therefore minimum holding temperature shall be 700 C.

Octane

On Fri, Oct 4, 2013 at 7:33 PM, Abhishek Rai <abhish...@gmail.com> wrote:

Dear Sir,

Please confirm the requirement of PWHT b/w welding of P91 & SS 304.the operating temperature of piping is 640 deg c .

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[HAREESH K V]

Sa335 Gr P91 side to be buttered up to a minimum of 13mm with ERNiCr-3. Then PWHT to be done for that side as per the requirement of P91 to P91 welding (Normally 720 deg temperature up to a minimim of 2hrs). Then face prepration is to be done (Ensure a 13mm buttering after this face prepration)

Then prepare the joint b/w P91 and SS304 and weld with ERNiCr-3

No PWHT requirements after this

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Hareesh K V
+91-9447625012

[pgoswami]

Hello Abhisekh Rai,

 

What's the thickness involved here ??

 

Thanks

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Specialist

Ontario, Canada

pgos...@quickclic.net

pgos...@sympatico.ca

 

 

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of HAREESH K V
Sent: Monday, October 07, 2013 3:26 AM
To: materials-welding
Subject: Re: [MW:18867] PWHT Requirement for dissimilar welding b/w P91 & SS304

[hany alfy]

Dear Experts

Is Abrasive blasting is necessary before Hod Dipped Galvanization or can be only Acid Cleaning 

Regards,

H.A

[Abhishek Rai]

Dear Sir ,

the thickness of P91 material is 21 mm and for SS304 material is 12 mm. This is the fillet joint for support as running pipe is of P91 material and support pad is of SS304 H.

Please advise for PWHT & WPS .

Regard's

Abhishek Rai

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Abhishek Kr.Rai
Engineers  India Limited

[mustaffi]

Dear Hany alfy,

 

I believed you’re refer to pipe use for handrails , normally we always proceed to remove the whole surfaces that appeared like a shiny surfaces or “lacquer” to protect the steel form rusting with grinding or swept blast /2.0 prior sent it the items to galvanizer company. Their always claimed acid doesn’t works to remove it then that were effected in galvanic zinc process.

 

Regards

Mus

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[Chan, David]

Hi H.A.,

It is not necessary for abrasive blasting before Hot Dipped Galvanizing as the vendor will “clean” your items or fabricated components with the various solvents before dipping into the zinc pool

Maybe, please refer to your hot dipped galvanizing vendor for their brochure which will give you additional information on the process

 

Thank you

Best Regards

 

David Chan

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of hany alfy
Sent: Monday, October 07, 2013 6:34 PM
To: material...@googlegroups.com
Subject: [MW:18869] Requirements before Hod Dipped Galvanization

 

 

Dear Experts

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[purvin...@linde-le.com]

For one of the project we have been guided that we can use 3.5 % Nickel Steel ( A 203 Gr E) up to -104° C, design temperature.
But I am in under impression that if I will go with, for example SMAW electrode (E 7015-C2L, E 7016-C2L & E 7018-C2L) then as per ASME Sec II C, it can be use up to -100 ° C.

My question is that should we use same electrode for -104 ° C.

When we talk about plate material one of the very reknown German steel mill is agree to supply A 203 Gr E on -104 ° C.



Best regards
Purvin Bhatt

Linde AG - Linde Engineering Division
ENM - Engineering QA/QC
Dr. Carl-von-Linde-Str. 6-14
82409 Pullach/Germany
Phone +49.89.7445 - 5441 • Fax +49.89.7445 - 4952
E: purvin...@linde-le.com

This e-mail is confidential. If you are not the intended recipient, please notify us immediately. You should not disclose its contents to any other person nor use it for any purposes.
Please do not print this email unless it is absolutely necessary.


Abhishek Rai ---07/10/2013 17:01:49---Dear Sir , the thickness of P91 material is 21 mm and for SS304 material is 12 mm.

[pgoswami]

Pravin,

 

The AWS specification mentioned below is the recommended matching consumable for this material. It may  provide the guaranteed impact @ -104 Deg C. One advise at the time of purchase do not buy  the consumable just meeting the ASME Sec-II, Part C requirements.

 

Thanks.

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Specialist

Ontario, Canada

pgos...@quickclic.net

pgos...@sympatico.ca

 

 

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of purvin...@Linde-LE.com
Sent: Monday, October 07, 2013 12:40 PM
To: material...@googlegroups.com
Subject: [MW:18878] 3.5 % Nickel Steel ( A 203 Gr E)

[pgoswami]

Hello Abhisekh Rai,

 

As explained by the other members , Buttering Grade-91(with Inconel -82/182) , performing PWHT , and thereafter welding SS304 would be the way to go. The welds between P-91 and SS 304 should subjected to PWHT as the last resort.

 

If there're many such dissimilar weld  joints and PWHT is the only solution then the attached  welding consumable could be a good option.(Note I'm not selling this product, acceptance is subject to vendor's interpretation).

This product was developed by EPRI & Metrode, see the detail in the attached documents. The only problem is it lacks AWS classification.

 

Hope this would be of help.

 

Thanks.

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Specialist

Ontario, Canada

pgos...@quickclic.net

pgos...@sympatico.ca

 

 

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Abhishek Rai
Sent: Monday, October 07, 2013 8:32 AM
To: pgoswami
Cc: material...@googlegroups.com
Subject: Re: [MW:18870] PWHT Requirement for dissimilar welding b/w P91 & SS304

[Zakaria ghrab]

Dear all,

  we had the same case, our client requested to us with qualified WPS to weld directly with  ERNiCr-3 and perform PWHT according P91 pwht parameters;

Construction code : ASME B31.1

Any comments, please advise ;

Regards.

2013/10/9 pgoswami <pgos...@quickclic.net>

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زكرياء غراب
GHRAB Zakaria
Jorf Lasfar Units 5&6 Power Plant construction Project
EA2C/ SDEM Entreprises
Site QA/QC Manager
Mobile : Morocco (+212) 6 61 07 00 11
             Tunisia (+216) 96 635 805


Yesterday is the pass, tomorrow is the future; and today? Today is the present, the gift: Enjoy it!

[Vanchinath S.A.]

dear Purvin,

your material and weld procedure tested at minus 100 degC holds good for minus 106degC. Refer section VIII div 1 table UG 84.4  for yield strength less than 280Mpa. SA 203 Gr E fits into.

regards

vanchinath

[JIGNESH RANA]

Dear Mr. Purvin,

 

Why don't you ask welding consumable supplier to supply elctrodes actually tested at -104 Deg C for your requirements

instead of -100 Deg C ?  

 

 

Cheers and keep us updated.

 

 

regards,

jignesh rana.

On Mon, Oct 7, 2013 at 10:10 PM, <purvin...@linde-le.com> wrote:

[pjsha...@yahoo.co.in]

What is energy require @ minus 104 degree cent ?

Sent on my BlackBerry® from Vodafone

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From: JIGNESH RANA <2010...@gmail.com>

Sender: material...@googlegroups.com

Date: Tue, 8 Oct 2013 17:36:01 +0530

To: <material...@googlegroups.com>

ReplyTo: material...@googlegroups.com

Subject: Re: [MW:18909] 3.5 % Nickel Steel ( A 203 Gr E)

[purvin...@linde-le.com]

Hello,Vanchinath,
Thanks, but declared information by u is limited to Material only,

For Material I do not have any problem, I am quite concerned about welding

Best regards
Purvin Bhatt

Linde AG - Linde Engineering Division
ENM - Engineering QA/QC
Dr. Carl-von-Linde-Str. 6-14
82409 Pullach/Germany
Phone +49.89.7445 - 5441 • Fax +49.89.7445 - 4952
E: purvin...@linde-le.com

This e-mail is confidential. If you are not the intended recipient, please notify us immediately. You should not disclose its contents to any other person nor use it for any purposes.
Please do not print this email unless it is absolutely necessary.

"Vanchinath S.A." ---10/10/2013 09:33:55---dear Purvin, your material and weld procedure tested at minus 100 degC holds good for

[hany alfy]

Yes it is pipe 610x19 but it fabricated as mooring pipes

Finally the Blasting should be done in case the materials have painting on surface 

If you have any references please email to me

Regards,

Hani Alfe

[pgoswami]

Please check with the following companies on welding resources for 3.5% Ni steel:-

• Bohler Thyssen
• Oerlikon
• Lincoln weld -Metrode

Some  samples are as attached. 3.5% Ni steel consumables are "easily" guaranteed for impact down up to -101 Deg C as a standard. Consumable manufacturers routinely include this data in their catalogue .If you require anything specific , bets would be to communicate with the manufacturers.

 

Few members of the above 3 companies do participate in this forum on regular basis and may be of help.

 

Thanks.

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Specialist

Ontario, Canada

pgos...@quickclic.net

pgos...@sympatico.ca

 

 

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of purvin...@Linde-LE.com
Sent: Thursday, October 10, 2013 3:54 AM
To: material...@googlegroups.com
Subject: Re: [MW:18912] 3.5 % Nickel Steel ( A 203 Gr E)

[Vanchinath S.A.]

dear Purvin,

pl note UG 84a for impact test includes  weldment and material. hence electrode tested at minus 100degc and welding procedure tested at minus 100degC can be used for application requiring minus 104 degC without any further testing. if you are particular you use the material and weld consumable tested at minus 100 degC and carryout impact at minus 104 degC.

regards

vanchinath

[rishikesh shahi]

Depend up on customer... can do acid pickling..

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