This Practice provides pressure testing procedures for pipelines designed and constructed to ASME B31.8 Gas Transmission and Distribution Piping Systems, hereinafter referred to as B31.8, and in accordance with DOT CFR 49 Part 192 Subpart J and ASME B31.4 Pipeline Transportation Systems for Liquids and Slurries, hereinafter referred to as B31.4 and in accordance with DOT CFR 49 Part 195. This Practice describes the procedures, practices, and precautions to be used in pressure testing metallic pipelines in accordance with the Code, and describes requirements that are in addition to those of the Code.