before you do second PWHT, PQR is essential to demonstrate this action is OK.
but I don't think hardness value can be used to tell PWHT have been done or not.
and pls. note, each PWHT will cause other potential risk, such as, distortion, cracks, scale, out of roundness, excessive oxidation, etc.
在 2016年7月4日星期一 UTC+8下午1:26:00，muthu barathi写道：
Hi experts,
Contractors carried out the PWHT and graphs available with correct data's. Due to urgency the contractor has painted and erected. It is CS material.
Now the owner rejected the reports and asking for PWHT again.Please send me your best answer if the PWHT is carried again , whether it will affect the welding and material properties and how to prove that PWHT has been carried out. How many times the PWHT could be carried out repeatedly.
Please send your replies.
Thanking you.
With Regards,
Muthu Barathi P.
Sent from RediffmailNG on Android
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