Acceptance criteria for clustered pore for ASME B 31.3 piping? where to refer?

[Srinivas Engr]

Dear Gents,

Please advise me the acceptance criteria for cluster porosity, as per B31.3 process piping.
pl explain me with reference.

Thanks & Best Regards
Srinivas

[sathishkumar R]

Dear srinivas.!

 You may need two things : 1) Fluid category 2) Type of weld..

   Internal porosity - Examination method RT 

   surface porosity ( Evaluated only for weld nominal thickness less than 5mm ) - Examination Visual and RT - Acceptance criteria - Zero ( No evidence of imperfection ), But take care of Foot NOTE 5  

    Refer B31.3- table 341.3.2.. This table will help you.!

Regards

SATHISHKUMAR R

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