scope:

This Standard applies to pipelines (including associated installations) intended to convey Natural Gas, a 2nd family gas as defined by BS EN 437 Test gases. Test pressures. Appliance categories.

For the purposes of this Standard, the term "pipeline" means a main or a service. Where necessary, the terms "main" and "service" are used.

This Standard applies to new pipelines, associated installations and to disconnections and service alteration involving existing services.

Note: There is no intent that the Standard be applied retrospectively.

Historically the scope of this standard applied to exit connections from existing gas networks. However, the principles of this standard may also be applied to pipelines laid for entry connections.

This Standard applies to pipelines (and associated installations) of MOP not exceeding 7 bar. 2.4 This Standard is intended to ensure that constructed pipelines and associated installations are suitable for adoption by a GT.

It addresses the following:

• adoption criteria and process

• overall design (which also involves sufficient information being available to enable subsequent assurance of integrity and safety of all the impacted GT's systems)

• detailed design review for networks (ensuring the submission is compatible with the GT's existing network)

• construction (in accordance with relevant technical standards)

• connections to live gas networks

• variation procedures

• alterations and disconnections

• fitness for purpose of materials and equipment

• PSSR.

Note: "Adoption" in this Standard means "vest in" as termed in the Gas Act 1986 (as amended) Part 1 Section 10.

All references to gas pressure are gauge pressure, unless otherwise stated.

Details of all legislation, standards and other publications referenced within this standard are provided in Appendix 2. Where Standards are quoted, equivalent national and international standards, etc. equally may be appropriate.

Italicised text is informative and does not represent formal requirements.

Appendices are informative and do not represent formal requirements unless specifically referenced in the main sections via the prescriptive terms "should", "shall" or "must".