1.1.1 Minimum safety requirements
This Standard sets out minimum safety requirements and makes recommendations for the design, construction, installation, inspection, testing, operation, maintenance and corrosion control of gas distribution systems.
1.1.2 Application
Gas distribution systems within the scope of this Standard are as defined in the Gas Act, which states in part: "all fittings, whether above or below ground, under the control of a gas distributor and used to distribute gas from:
(a) The boundary of the gasworks or gate station outlet flange supplying gas for distribution; or
(b) The outlet of the container in which gas for distribution is stored;
to the outlet of the gas measurement system of the place at which gas is supplied to a consumer or gas refueller (or where no such gas measurement system is provided, to the custody transfer point of the place at which the gas is supplied to a consumer or gas refueller)."
1.1.3 Systems not covered
The Standard does not apply to the following:
(a) Design and fabrication of pressure vessels used in the distribution system;
(b) Any system that may operate at a pressure greater than 2000 kPa.
NZS 5258:1995 history
2003NZS 5258:2003 Gas Distribution Networks (Amendment 1: 04/2005)