I was wondering where I can find inspection and testing exemptions for
ASME B31.3 piping for O&G flow line piping. I'm not sure, but I think
PHMSA Part 192 talks about pipes operating at less than 20% of SMYS in
class 1 locations, and may be class 2 locations with proper compliance
in welding procedure and welder qualification.
I had a construction foreman ask if line pipes that don't see more
than 500psi can be exempt from some of the three (visual, NDE, and
hydro testing), basically to where they can't do all three if the
pressure is low enough and the class location is 1 or may be 2 with
good design of weld and welder qualfication...
Any advice please?
I understand that B31.3 have different applications compared to B31.4
and B31.8. But I could not find anything anywhere about B31.3, and I
think the information in PHMSA part 192 applies to the pipeline side,
and I was considering applying/adopting it as the closest thing.
Anyway,
Do you have anything that gives a clue for exemption for (B31.4 and
B31.8) inspection, examination, and testing or where one can do x-ray
and not have to worry about hydro or vise versa. Especially for low
pressure welded lines in class 1 locations, and may be some class 2
locations (if possible) as long as all fabrications and fabricators
follow qualified procedures in ASME Section IXAlso for B31.3
Thank you very much.
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