I have been inspecting the structural steel for a co-generation plant, and the work expanded to include the feedwater and high pressure steam lines. This was no problem as I have a copy of ASME B31.1, but today I was asked about the turbine lube oil cooler lines. The job specifications call for NFPA Fuel Gas Code 54, and there is no copy available onsite. Before I beat the bushes trying to find one, can anyone out there tell me if they have worked with this code, and does it contain anything specific to pipe welding, or does it just refer you to ASME B31.1? The contractor on this job has never seen this requirement before, and I would hate to purchase yet another code book if it isn't going to apply to welding.