This Practice provides requirements for designing metallic pipeline systems within facilities as defined in ASME B31.8 Gas Transmission and Distribution Piping Systems and ASME B31.4 Pipeline Transportation Systems for Liquids and Slurries [hereinafter referred to as the Code(s)]. This Practice provides requirements for pipeline systems arrangement, design conditions, components, and joints. This Practice shall be used in conjunction with the Code(s). The requirements of this Practice may be more stringent than the Code(s) for the purpose of standardization and not because the Code(s) is considered unsafe. Pipeline systems designed in accordance with other piping codes are not included in this Practice.