From: Ajay Sent: Τρίτη, 29 Σεπτεμβρίου 2015 - 07:37 Reply To: material...@googlegroups.com Subject: [MW:23575] Regarding RT before or after PWHT |
For alloy steel greater than 3Cr, RTAfter PWHT.??
PWHT will relieve residual stress and can open up flaws which are otherwise closed by the residual stresses, and that is the reason why NDT for acceptance purposes is performed after PWHT.
Alan Denney
AKD Materials Consulting Ltd
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Ajay
Sent: 29 September 2015 05:03
To: material...@googlegroups.com
Subject: [MW:23575] Regarding RT before or after PWHT
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From: Ajay Sent: Τρίτη, 29 Σεπτεμβρίου 2015 - 11:18 |
Reply To: material...@googlegroups.com |
Subject: Re: [MW:23594] RE: 23575] Regarding RT before or after PWHT |
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From: Kannayeram Gnanapandithan Sent: Τρίτη, 29 Σεπτεμβρίου 2015 - 16:47 To: materials-welding Reply To: material...@googlegroups.com Subject: Re: [MW:23605] RE: 23575] Regarding RT before or after PWHT |
From: Kannayeram Gnanapandithan Sent: Τρίτη, 29 Σεπτεμβρίου 2015 - 16:47 To: materials-welding Reply To: material...@googlegroups.com |
Subject: Re: [MW:23605] RE: 23575] Regarding RT before or after PWHT |
Yes P15E very much.
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Dear ,
Pwht is most important after welding but not for the all line .
Why because we have to identify the changes occur during welding and ...so on so many reasons.
pravez Alam
TP verifier
Air Energy
indonesia
+6289503908946
Expect the Unexpected.....
The reason for pwht is to get rid of hydrogen cracking.......ask yourself.....is hydrogen cracking a planar defect or a volumner defect.....if its planar then you can do a rt before pwht but if the defects in hydrogen cracking is volumner too then you cant do a pwht.....
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