heating and PWHT if any.
S.N.Bagchi.
<snbagchi@aol.in>
-----Original Message-----
From: Vanchinath S.A. <vanchinaths@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Fri, Dec 2, 2011 10:32 pm
Subject: Re: [MW:13127] P22 Hardness issues
Dear Mr.Bhatti,
what is the thickness of weld joint? P22 material should be stress
relieved at 710 plus minus 20 deg C for min two hours to get hardness
below 235BHN.
vanchi
On Thu, Dec 1, 2011 at 10:25 AM, N Bhatti <naveedabb@gmail.com> wrote:
Hi Experts,
I need a little favour to get some reviews/opinions about an on going
issues of P22 material regarding PHWT on my site.
Attached results show that PWHT has not been done effectively.
In the attached file here are some results of weld joint for main high
pressure steam line (approx. 33mm thick).
In weld no. 1 Each weld pass have different values i.e 172, 281 & 184
much difference among them. I need to know what are possible causes and
and now acceptance criteria.
Further for other joints what is your opinion in respect of acceptance
(ref. value is 240 or upto what value we can accept these) and at which
place it has been addressed in ASME B31.1 or in AS 4041?
What is the recommended treatment now?
Thanks all your time & attention.
Looking forward for reply please.
Kind regards,
Bhatti
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