scope:

This procedure covers design, construction, testing, commissioning, operation and maintenance of pipe constructed from RTP material that is buried, laid between points on land, with a MOP exceeding 7 bar and not exceeding 100 bar. In general, the requirements of IGEM/TD/1 are to be followed, with additional guidance relating specifically to RTP pipe being provided by this Standard. It is noted that not all requirements of IGEM/TD/1 are appropriate to RTP pipe; however, it may be necessary to consider some aspects (e.g. cathodic protection) as part of the overall pipeline. In some cases it has been necessary to reference IGEM/TD/3 as an example Standard for the requirements of polyethylene (PE) liner materials.

The requirements of IGEM/TD/13 Edition 2 are to be followed for the design, construction, inspection, testing, operation and maintenance of pressure regulating installations connected to the RTP pipe.

Note: RTP section may include short sections of steel.

An RTP system has different operation and maintenance requirements to those of a steel system and therefore may only be installed where it is possible to decommission the RTP section without implication on the continuity of supply.

All references to pressure are gauge pressure, 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".