I may be imagining things again, but I'm pretty sure I've seen welding done at ambient temps below freezing. I seem to remember steam-heated temporary tents built around the pipeline to enclose the welder and equipment.
Paul
> B31 and Section VIII require a qualified weld procedure. good
practice do
> show that its almost impossible to pass a weld done even 10degC.
gotta be
> careful with api 2201. Its an excellent guide but its still
missing some
> importatnt stuff needed to be consider prior to welding the
fitting and
> cutting the coupon. Brittle fracture can be avoided by using an
impacted
> tested material (both base and the weld matl). i wouldnt venture
striking an
> arc on a lox (liquid oxygen) line though.
Received on Fri May 25 20:01:00 2001
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