Thursday, February 4, 2021

[MW:31983] ASME B31.3_2018- Table 331.1.1-PHWT minimumn Holding Time for base material thk-75mm

Dear Experts

Need your guidance in understanding  PWHT minimum  Holding Time base material thk.-65 ~ 75mm

P-No. 1, Group Nos. 1–3
Minimum Holding Time at Temperature for Control Thickness [Note (2)]
-Up to 50 mm (2 in.)-1 h/25 mm (1 hr/in.);15 min min.
-Over 50 mm (2 in.)-2 hr plus 15 min for each additional 25 mm (in.)


Best Regards
Ganesan

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