scope:

This Standard specifies the graphical symbology that are to be used for engineering drawings and associated record systems.

This Standard covers gas infrastructure and networks including typical assets but not limited to pipelines, mains, services and associated plant and control equipment.

This Standard draws upon existing British and international Standards for graphical symbols and details those commonly used in the gas industry.

Pressures quoted are gauge pressures unless otherwise stated.

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 "must", "shall" or "should".