Ed - Correct, my interpretation is that the pipe should be Charpy impact tested to 32 F.
George - This is Y-grade so ~40% C2, ~30% C3, and the remainder is C4+. Our drain lines where we de-pressure are good for -50F to account for JT.
Steve - On our pump suction/discharge lines we keep the...
I'm working on NGL pipelines and pump stations (B31.4) and have had several discussions on the interpretation of the Charpy impact test requirements in section 423.2.3. The code states "Steel pipe designed to be operated at a hoop stress of more than 20% SMYS shall be impact tested in...
