A106B in 900#/1500# Service
A106B in 900#/1500# Service
(OP)
I have been reviewing some pipe specifications recently for 900# and 1500# natural gas service in sizes up to and including 12" and I am getting confused about minimum temperature requirements for A106B pipe.
From the way I read B31.3, A106B is a curve B material and therefore should not be used for conditions below the curve unless you can apply stress reductions or the service is non-corrosive, non-flammable etc etc where-by you are limited to -20F (-29C) at any thickness.
Is this the correct interpretation? Is there a nominal thickness (below Curve B) where the pipe material specification should change to A333-6 to maintain the low temperature suitability? In this instance I am only chasing 14F (-10C).
I look forward to your feedback.
Regards
CSGWB
From the way I read B31.3, A106B is a curve B material and therefore should not be used for conditions below the curve unless you can apply stress reductions or the service is non-corrosive, non-flammable etc etc where-by you are limited to -20F (-29C) at any thickness.
Is this the correct interpretation? Is there a nominal thickness (below Curve B) where the pipe material specification should change to A333-6 to maintain the low temperature suitability? In this instance I am only chasing 14F (-10C).
I look forward to your feedback.
Regards
CSGWB





RE: A106B in 900#/1500# Service
Was that the question?
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RE: A106B in 900#/1500# Service
Thanks. That pretty well covers it and confirms my belief. I wasn't sure if there was another clause, table or note that said otherwise.
Regards
CSGWB