AS/NZS 4645.1:2008

Specifies performance-based requirements for a fuel Gas Distribution Network safety, defining important principles throughout the life cycle of Gas Distribution Networks. The standard provides prescriptive, deemed to comply, means of compliance in support of some of those requirements and allow for alternative means of compliance that may be also acceptable provided the required safety outcomes can be demonstrated.

Except as provided in Appendix A, this Standard specifies requirements for safe management of a gas distribution network operating at less than or equal to 1050 kPa, throughout the life cycle of all elements of that network.The requirements apply to the life cycle of new assets in new or existing networks, whereas the Sections on operations, maintenance, repair, decommissioning, gas quality and risk assessment may be suitable for application to existing assets in existing networks.Gas distribution networks within the scope of this Standard comprise all facilities between the outlets of all city gates, supply points or equivalent, or for an LP Gas network, the point of entry to the gas distribution network, and the outlet of the consumer’s meter assemblies, as detailed in Figure 1.1.Additional requirements for steel gas distribution networks at MAOP greater than 1050 kPa under this Standard are identified in Appendix A. Appendix A is applicable in New Zealand and where explicitly adopted by legislation in Australia.

Originated as AG 603 1978.
Previous edition AS 4645 2005.
Jointly revised and redesignated as AS/NZS 4645.1:2008.