Dear Friends,
We need to check all requirements in line with code specific to the item . Certain codes do specify NDT after PWHT . Certain client specifications specify the NDT requirements after PWHT . so do not conclude requirements in general.You may refer this in BS 5500 for pressure vessels or B31.3 for piping
Regards,
----- Original Message -----
From: dlsltd@telus.net
To: materials-welding@googlegroups.com
Sent: Thu, 20 May 2010 23:41:40 +0530 (IST)
Subject: Re: [MW:5199] NDT after PWHT
I don't believe there is any requirements, but
on P5-B materials, it is a common practice as cracks have been known
to form after 24 hours on these materials. I have heard of some materials
on "Hold" pending another RT after the initial test after 7 Days.
on P5-B materials, it is a common practice as cracks have been known
to form after 24 hours on these materials. I have heard of some materials
on "Hold" pending another RT after the initial test after 7 Days.
I have just completed PWHT on ASME 1 piping and
there is no requirement on P1 material for additional RT after cool
down.
there is no requirement on P1 material for additional RT after cool
down.
----- Original Message -----
From:
Luis
Albanes
Sent: Thursday, May 20, 2010 6:30
AM
Subject: [MW:5198] NDT after PWHT
Dear friends
We just finished PWHT in an LPG sphere acording to ASME VIII
section I, and I can´t find in the code the part that obligues to Xray
after this treatment, any one has experience with this? where does
ASME VIII say it has to be done?
Thank you
Luis Albanés
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