NDT after PWHT - urgent question

[Hany Nabil]

Dear Gents

For NDT for storage Tank the NDT before or after PWHT 

If after what is the reason to do NDT after PWHT 

Please send reference code 

Thanks 

Hany Nabil 

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 Best Regards,

 Eng. Hany Nabil

 Senior QA / QC Welding Engineer

 Email: eng.han...@gmail.com

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[Vishwas Keskar]

There are no any guidelines in Codes for NDT after or before PWHT.

For Gr 91 welding , it is now after PWHT only.

In General  , industry standard is  as below

1. For Alloy steel,  NDT is after PWHT .

2.For Carbon steel , NDT is done before PWHT.

regards

Vishwas

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[Kannayeram Gnanapandithan]

Ref ASME B31.1, 136.4.1

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. 

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