Re: [MW:31991] ASME B31.3_2018- Table 331.1.1-PHWT minimumn Holding Time for base material thk-75mm

2 hours for 50 mm additional 15 minutes for 15~20 mm.

On Fri, Feb 5, 2021, 1:33 PM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

based on toughness requirement

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Fri, Feb 5, 2021 at 8:36 AM Chandru Sekar <chandruyou25@gmail.com> wrote:

Why they segregated as group and in which basis ?

On Thu, 4 Feb 2021, 08:31 Anban, <gane2478@hotmail.sg> wrote:

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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