Thanks everyone. I'm not sure I see a clear answer. But it could be that they have determined that for CL600 pipe that is >=16", that it is more cost effective to use thinner walled API 5L with an impact testing program than thicker walled A333. (That appears logical to me. I just don't have...
Its a northern, cold-weather site with a -40F ambient. Its pipeline quality natural gas, so it will be dry. Thus, there is no reason to insulate it. Therefore, the pipe will be exposed to the -40F environment, which is what lead me to assume the need for low temperature carbon steel, A333 Gr...
My Client has a limitation of 14" OD for A333 pipe in their pipe spec. Pipe that is 16" or larger shall be API 5L. (Natural gas pipeline, low temperature carbon steel service.) Any ideas as to why they might limit the OD of A333 to 14"?