3. A metallic electrical bond is to be installed around the location of cuts in metallic gas pipes made by other than cutting torches. cutting torches, welding, or other sources of ignition are unavoidable, it must be determined that all sources of gas or gas-air mixtures have been secured and that all flammable gas or liquids have been cleared from the area. Piping is to be purged as required in NFGC/IFGC before welding or cutting with a torch is attempted.