PWHT of branch connections.

[Hareesh K V]

Dear Sir,

As per ASME B31.3, for branch connections, PWHT is to be done for the entire circumference of main pipe. Is there any exceptions/code interpretations for that, in Carbon steel material or Alloy steel material (SA335 Gr P9,95)?

For example: A 3/4" branch is done on the main pipe of 60" dia. As per the code requirement, the entire 60" dia is to be wrapped with coil and PWHT is to be done.

Thanks in advance.

Regards,

Hareesh K V

+91-8547859202

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Hareesh K V
+91-9447625012

[afrozsh...@gmail.com]

Dear Harish,

Please reffer AWS D10.10 FIG 6 (PWHT Pratice for branch connection to Pipe attachment weld )

Regards,

Afroz Shaikh

[George Dilintas]

the code use the term "shall" (in other sections also).

To the best of  my knowledge no execption

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis