[MW:4825] ASME B 31.1 welded pipe in boiler external piping

Dear all,

 

As per ASME B 31.1 Anex –A Table A-1 note 1 , it seems that we could not used welded pipe A 671 , A672 for pressure retaining parts of external boiler piping .

But for the same time Plate material A515,A516 is allowed.

 

Now my query “are welded pipes are not allowed for boiler external piping   as per ASME B 31.1.

 

Kindly reply.

 

Regards,

Vinayak Nivendkar