ASME B31.8 Gas Transmission & Distribution Piping Systems

ASME B31.8 covers gas transmission and distribution piping systems, including gas pipelines, gas compressor stations, gas metering and regulation stations, gas mains, and service lines up to the outlet of the customer’s meter set assembly. It includes gas transmission and gathering pipelines, including appurtenances that are installed offshore for the purpose of transporting gas from production facilities to onshore locations; gas storage equipment of the closed pipe type that is fabricated or forged from pipe or fabricated from pipe and fittings; and gas storage lines.

Key changes to this revision include adding the following: a new section to address fit up requirements for bends and elbows; specific language and/or references to include non-pressurized pipe; guidelines for assembly of flanges; pig trap design safety requirements; the use of Multilayered Reinforced Thermoplastic Piping Systems (MRTPS); and requirements for general monitoring for Abnormal Operating Conditions (AOCs) and decoupling AOCs from covered task qualifications. In addition, the list of approved valve specifications has been expanded.

This Code prescribes comprehensive solutions for materials, design, fabrication, assembly, erection, testing and inspection. It also serves as a companion to ASME’s other B31 codes on piping systems. Together, they remain essential references for anyone engaged with piping.

Careful application of these B31 codes will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.

Intended for manufacturers, users, constructors, designers, pipeline operation and maintenance personnel, and regulatory personnel, plus all potential governing entities.

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