EN 1594 describes the functional requirements for pipelines for maximum operating pressure over 16 bar. It also describes the mechanical requirements for pipework in stations with a maximum operating pressure greater than 16 bar.
EN 1594 is applicable for transporting gas via onshore high-pressure steel pipeline infrastructures, where the following applies:
— onshore:
— from the point where the pipeline first crosses what is normally accepted as battery limit between onshore and offshore, and that is not located within commercial or industrial premises as an integral part of the industrial process on these premises except for any pipelines and facilities supplying such premises,
— pipeline system with a starting point onshore, also when parts of the pipeline system on the mainland subsequently cross fjords, lakes,
— high pressure: gas with a maximum operating pressure over 16 bar and a design temperature between −40 °C and 120 °C,
— steel pipeline infrastructure: infrastructure consisting of pipeline components, such as pipes, valves, couplings and other equipment, restricted to components made of unalloyed or low alloyed carbon steel and joined by welds, flanges or mechanical couplings,
— gas: non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these gases where technical evaluation has ensured that operating conditions or constituents or properties of the gas do not affect the safe operation of the pipeline.
This standard can also be applied to the repurposing of existing pipelines. EN 1594 is intended to be applied in association with national standards or codes of practice setting out the above-mentioned basic principles.
