This Practice describes guidelines for specifying requirements for examination and leak testing of metallic pipeline systems designed in accordance with ASME B31.8 Gas Transmission and Distribution Piping Systems. This Practice provides guidelines for specifying requirements for examination of piping materials, components, fabrication, assembly, installation, and associated documentation. This Practice provides guidelines for the extent of examination, criteria for acceptance, and correction of defective work. This Practice describes the types of leak tests, basis for selecting the appropriate tests, and arrangements for testing piping.