Saturday, July 2, 2011

[MW:11567] factors leading to PWHT of piping

Dear friends,

your kind advice is require on below issues.

  • What are the factors leading to PWHT of piping material, other than B31.3 PWHT requirement table ,

  • What kind of specific services requires PWHT mandatory. (like caustic is compulsory for certain temp., anything else).
  • Is it compulsory to PWHT of piping in chlorine service irrespective of thickness or P no. as per B31.3 table.


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