This Practice provides requirements for fabricating and examining piping systems in accordance with ASME B31.8 Gas Transmission and Distribution Piping Systems, (hereinafter referred to as the Code).

This Practice describes the requirements for both shop and field fabricated piping and pipelines constructed in accordance with ASME B31.8. Piping fabrication requirements are provided for materials, welding, forming, and heat treatment.

Examination requirements are provided for piping materials, components, fabrication, assembly, and erection. Requirements for examination documentation are provided. Examination methods, acceptance criteria, and requirements for correction of defective work are also provided.