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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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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