scope:

This European Standard specifies requirements which enable a Transmission System Operator (TSO) to develop and implement a safety management system. The Standard describes the resources, information systems and technical and organisational activities, for which the TSO is responsible and which are needed to prevent incidents and mitigate their consequences. These resources and activities are implemented according to the technical and economic requirements specific to each TSO. Through this SMS the TSO and its stakeholders are ensured of a safe gas transmission infrastructure. The SMS enables the transmission system operator to comply with its policy and objectives to manage safety aspects. The policy and the objectives take into account legal requirements and other requirements to which TSO subscribes. The purpose of SMS is to ensure: ? the safety of the public ? the protection of urban, natural or industrial environment ? the service life and reliability of natural gas infrastructure Occupational health and safety is excluded from this European standard because it is covered by national legislation and other European and/or international standards, e.g. OHSAS 18001. Gas infrastructures in this standard are the assets needed for transmission of natural gas; gas distribution is excluded. Assets for transmission of natural gas are: ? pipelines onshore including valve stations; ? compressor stations; ? metering and pressure reduction stations. All infrastructure covered by the Seveso II Directive (e.g. LNG plants, Under Ground Storages etc.) are excluded from the scope of this standard. Also gas pipelines as integral parts of industrial processes are excluded from the scope. The SMS is applicable to gas infrastructure for the transmission of processed, non-toxic and noncorrosive natural gas according to EN ISO 13686 where: ? the pipeline elements are made of unalloyed or low-alloyed carbon steel; ? the pipeline elements are joined by welds, flanges or mechanical joints. This European standard specifies requirements on a general level. The referenced documents given in clause 2 "Normative references" give more detailed requirements for some of the assets listed above.