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This document describes the specific functional requirements for the design, construction, operation, maintenance and disposal activities for safe and secure gas compressor stations. This document applies to new gas compressor stations with a Maximum Operating Pressure (MOP) over 16 bar and with a total shaft power over 1 MW. For existing compressor stations, this document applies to new compressor units. Where changes/modifications to existing installations or gas composition take place, due account can be taken of the requirements of this document. This document does not apply to gas compressor stations or compressor units operating prior to the publication of this document. For existing sites this document can be used as guidance. The purpose of this document is to: — ensure the health and safety of the public and all site personnel; — cover environmental issues; — avoid incidental damage to nearby property; and — open the gas infrastructure to accommodate renewable gases, including a possible design for hydrogen. This document specifies common basic principles for the gas infrastructure. Users of this document are expected to be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries. This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles. In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this document, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts). CEN/TR 13737 (all parts) gives: — clarification of all legislations/regulations applicable in a member state; — if appropriate, more restrictive national requirements; — a national contact point for the latest information. This document does not apply to: — off-shore gas compressor stations; — gas compressor stations for compressed gas filling-stations; — customer installations downstream of the point of custody transfer; — design and construction of driver packages (see Annex C); — mobile compressor equipment. For supplies to utility services such as small central heating boilers reference is made to EN 1775. Figure 1 shows a schematic representation of compressor stations in a gas infrastructure. For further information refer to Annexes A, B, C, D, E and F. [Figure 1]
This document gives guidance on how to assess the feasibility of extending the service life of a pipeline system, as defined in ISO 13623, beyond its specified design life. Pump stations, compressor stations, pressure-reduction stations and depots are not specifically addressed in this document, as shown in Figure 1. This document applies to both onshore and offshore rigid metallic pipelines and risers (including SCRs). It is not directly applicable to the following: — flexible pipelines; — pipelines constructed from other materials, such as glass reinforced plastics or polymers; — umbilicals (control and / or chemical conveyance service); — topsides equipment and piping (outside of pipeline system limits defined in accordance with local regulatory requirements); — pipeline protection and support structures and components. NOTE 1 The assessment process defined in clause 5.3 can be applied in the lifetime extension assessment of the above at the discretion of the user. As an example, guidance on use of the process for lifetime extension of unbonded flexible pipe is provided in Annex A. NOTE 2 Further guidance on the lifetime extension of subsea systems, including umbilicals and topsides equipment, is provided in NORSOK U-009. NOTE 3 Although the life extension of structures and structural elements is not addressed in this standard, the continued fitness-for-service of structures having a direct impact on the structural integrity of the pipeline system shall be considered throughout any period of extended operation. This shall include assessment of the implications of structural degradation on pipeline system integrity. Further guidance can be found in NORSOK N-006. This document addresses life extension, which is a change to the original design premise. It is also applicable to other changes to the design premise, such as MAOP re-ratings or a change to the conveyed fluids, at the discretion of the user. Guidance on the latter is provided in Annex B, given the potential for extension to operating life of a pipeline system being solely dependent on a change in operating fluids (such as when considering re-use of a pipeline for CCUS or for hydrogen transportation).