Hi,
Do you still have some doubt on replies to your query dated 03-Aug having subject "Difference between Control thickness & nominal material thickness ( Para. 331.1.3(c)" ?
Thanks
Atul Khatri
"
On Mon, Nov 4, 2019 at 8:44 AM anhtrangnghieng <anhtrangnghieng@gmail.com> wrote:
--Dear Experts,
Could you please advise me for the following questions:
Question: Preheat of > 95C (200F) is not used but the weld is made with multiple passes. Is PWHT required for a weld joining P-No.1 materials, when the control thickness is less than or equal to 25 mm (1 inch) but the nominal material thickness is greater than 25 mm (1 inch)?Could you please advise me: which thickness, Control thickness or Norminal material thickness, shall be used to determine PWHT requirements & exemptions as per ASME B31.3 ?
Thank you in advance for any help you can provide.
Regards.--PV
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