IGEM - TD/1
Steel pipelines and associated installations for high pressure gas transmission
|Publication Date:||1 July 2016|
This Standard covers the design, construction, inspection, testing, operation and maintenance of steel pipelines and certain associated installations (see Figure 1), for the transmission of dry Natural Gas (predominantly methane), with or without odorisation, at MOP exceeding 16 bar and not exceeding 100 bar. The scope may be extended beyond MOP of 100 bar but specific areas will require further justification and documentation which embraces a safety evaluation.
While the Standard may be appropriate for use with other gases, the characteristics of the gas and the consequential effect upon design, material, operations and maintenance of the pipeline have to be taken into account. In this context, other gases are those described by 1st family, other 2nd family and 3rd family gases as defined in BS EN 437.
Note 1: Requirements for steel pipelines of MOP not exceeding 16 bar are contained in IGE/TD/3, and on steel services in IGE/TD/4. Those Standards do not address associated installations so reference may also need to be made to IGE/TD/13 whose principles may be applied. Equally, it may be deemed appropriate to use the principles of this Standard for such installations.
Note 2: A safety evaluation involves a systematic study of the major hazard potential of a pipeline and its associated installation (see Sub-Section 6.8).
This Standard covers operating temperatures between - 25°C and + 120°C inclusive.
This Standard applies to pipelines laid between points on land, including water crossings. For pipelines of which any part is offshore, additional or alternative guidance may be required for the offshore section. However, many of these requirements will remain valid.
Note: Offshore pipelines are those that are on the seaward side of the low water mark or special boundaries drawn at bays and estuaries.
The Standard equally applies to pipework design for certain associated installations, including above-ground valves, pig trap installations, manifolds, multi-junction stations, the main pipework at compressor stations, metering installations, connections and other off takes but does not apply for PRIs (when IGE/TD/13 applies).
Note: This Standard is not intended to cover detailed planning and siting requirements for these associated installations.
All references to gas pressure are gauge pressure, unless otherwise stated.
Details of all legislation, standards and other publications referenced 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".