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Anonymous Poster #1

3 Cycles Simulated PWHT

04/23/2012 10:17 PM

Hello everyone,

I just want to know what exactly mean on below requirement of plate that Im going to procure in the plate mill or in the market. on what process it will be made (e.i. by test sample of plate and do the PWHT 3 times?) please kindly help.

Plates for shell shall be tested with 3 cycles simulated PWHT (One as required for service, One for shop repair and one for field repair/modification by COMPANY).

Thanks

Yhing
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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#1

Re: 3 Cycles Simulated PWHT

04/23/2012 11:44 PM

This should explain...

http://materials-welding.blogspot.com/2010/06/mw5675-re-5659-simulated-pwht-for.html

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lyn
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Join Date: Oct 2008
Posts: 42355
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#2
In reply to #1

Re: 3 Cycles Simulated PWHT

04/24/2012 12:03 AM

I think the OP is not ready to specify materials.

OP, it just means that the sample must pass requirements after 3 heat treatment cycles.
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TerraMan
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Join Date: Nov 2011
Posts: 473
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#4
In reply to #2

Re: 3 Cycles Simulated PWHT

04/24/2012 10:32 PM

"...must pass requirements after 3 heat treatment cycles"...Yes but after final welding. PWHT = Post Weld Heat Treatment
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electronick
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Location: ether
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#3
In reply to #1

Re: 3 Cycles Simulated PWHT

04/24/2012 4:25 AM

Gosh girl, you have a link to every subject... I think you could be a good teacher to me ;)!!!!

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Metallica
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Join Date: Dec 2010
Posts: 7
#5

Re: 3 Cycles Simulated PWHT

04/25/2012 4:16 AM

We have a similar requirement we have to qualify all our material and welding procedures for one and three cycles of PWHT, all it means is that when you install a new piece it needs to be PWHT, and then maybe there could be repairs done on the piece which would require more PWHT. So they want prove that after 3 cycles of PWHT your piece of metal will still have the required mechanical properties for which it was designed.
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ronclarke
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Join Date: Nov 2010
Posts: 507
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#6

Re: 3 Cycles Simulated PWHT

04/25/2012 10:34 AM

For a proper simulation you need to actually weld the sample according to the approved weld procedure.

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electronick (1); lyn (1); Metallica (1); ronclarke (1); SolarEagle (1); TerraMan (1)

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