This standard defines various important terms within natural gas systems and provides a basic guide to the arrangement of the components required in such a system.

It provides a framework and standard approach or new gas distribution mains, services, primary meter installations and installation pipework and include:

Definitions for the end of the gas network, the primary meter installation (including any associated regulator) and installation pipework

Illustrations of a range of recommended arrangements and those which, for historical reasons, are not recommended with respect to their design or layout and are 'legacy' arrangements

Identification of boundaries and interfaces.

It is applicable to all natural gas systems and defines the boundaries and interfaces between the end of the Network, a primary meter installation and installation pipework and, in addition, provides a definition of recommended gas supply arrangements which will simplify any new arrangements that are required to ensure a safe and secure supply of gas to a consumer.