What must be marked on gas supply pipes to comply with regulations?

To comply with regulations, gas supply pipes must be marked with both “Gas” and the ASTM D 2513 standard. This designation indicates that the pipes meet specific criteria for materials and construction practices established for gas transmission. ASTM D 2513 is the standard specification for poly ethylene gas pressure piping systems, ensuring that the materials used are safe and suitable for carrying gas.

This marking is crucial for safety and clarity, as it informs installers, inspectors, and maintenance personnel about the intended use of the pipe and its compliance with national safety standards. Only labeling a pipe as "Gas" or labeling it with a manufacturer name does not provide the necessary assurance regarding the standards applied to the materials used in the pipe’s construction. Hence, the combination of both the application and the standard ensures regulatory compliance and safety in gas operations.