PWHT For Trunnion support

[Chiranjeevi A]

Dear Raghuram Bathula,

   The main run pipe 20" is having thickness of 31.mm and being subjected to PWHT.

A dummy leg (12") is welded to the main pipe as dummy leg. pls confirm that, do we require PWHT at this joints as highlighted in below snap

[Tajuddin Mohammed]

Yes we need to do the  PWHT of these type of joints as it is directly welded to the pipe

Mohammed Tajuddin

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[Kannayeram Gnanapandithan]

Governing thickness is as per B31.1 & 31.3 is Nominal material thickness??

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[pradip kumar Sil]

If the material is CS as per B31.3, preheat temp is above 95 degree centrigrade then no need to conduct PWHT.

Only you have to qualify PQR

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[Mohd Siraj]

No need.

But if pwht is service requirement you have to do.

[MW]

what is your code of construction, and service? any project specific requirements?

[Venkadesh Lakshmanan]

No need, pls refer governing thickness specified in B31.3

Regards,