[MW:29968] Re: Difference between Control thickness & nominal material thickness ( Para. 331.1.3(c)

Control thickness is the thickness of weld and Nominal material thickness is the thickness of material

PWHT Requirement is based on control thickness (Table 331.1.3)

Preheat requirement is based on nominal material thickness

Hope you understand

Raneesh pk

QC Engineer

UAE 

On Saturday, August 3, 2019 at 9:06:23 AM UTC+4, anhtrang nghieng wrote:

Dear Experts, 

Could you please advise me for following question: 

Which thickness , Control thickness or Nominal material thicness as defined in Para. 331.1.3(c), shall be used to determine whether PWHT required or not in case preheat of 95 Deg C is NOT applied ? ( P-No. 1)

For case below, in accordance with ASME B31.3 2016 Ed , PWHT is required or not when preheat of 95 Deg C is NOT applied ? 

Thanks in advance.

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