This Standard specifies materials, design, construction, installation, testing and maintenance requirements for steel piping systems and shall be used in conjunction with AS/NZS 4645.1, for the distribution of fuel gas suitable for domestic, commercial or industrial uses, where - (a) the pressure of the gas is not greater than 1050 kPa and the operating temperature range of the materials is from (30°C to 120°C; operating pressures above 1050 kPa are covered by AS 2885; and(b) where the hoop stress level is not greater than 20% of the Specified Minimum Yield Stress (SMYS) of the pipe used in that system.NOTE: The relevant statutory authority may regard this standard as appropriate for other than fuel gas.The requirements apply to the life cycle of new assets in new or existing systems, but the Sections on materials and components, welding, pressure testing and maintenance are suitable for application to existing assets in existing systems.