This European Standard specifies the requirements for the design, manufacture and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids (as defined in EN 1251-1) below – 10 °C in addition to operation at ambient temperature. It is a requirement of this European Standard that the valves comply with EN ISO 4126 1 or EN ISO 4126-4. In the event of different requirements, the requirements for cryogenic service shall be applied. NOTE 1 A cryogenic fluid (refrigerated liquefied gas) is a gas which is partially liquid because of its low temperature (including totally evaporated liquids and supercritical fluids). This European Standard is restricted to valves not exceeding a size of DN 100 for category B. The valves of category A are limited to DN 25 and set pressures up to 40 bars. Both categories are designed to relieve single phase vapours or gases. A valve can be specified, constructed and tested such that it is suitable for use with more than one gas or with mixtures of gases. NOTE 2 All safety valves covered in this European Standard correspond to category IV of PED (Directive 97/23/EC) and category 3 of TPED (Directive 99/36/EC). NOTE 3 This European Standard does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in EN 13648 3.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
EN 1797:2001 Cryogenic vessels - Gas/material compatibility
EN ISO 21028-1:2016 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 1: Temperatures below -80 °C (ISO 21028-1:2016)
EN ISO 21028-2:2018 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 2: Temperatures between -80 degrees C and -20 degrees C (ISO 21028-2:2018)
EN 1797:2001 Cryogenic vessels - Gas/material compatibility
EN ISO 21028-1:2016 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 1: Temperatures below -80 °C (ISO 21028-1:2016)
EN ISO 21028-2:2018 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 2: Temperatures between -80 degrees C and -20 degrees C (ISO 21028-2:2018)
EN ISO 23208:2019 Cryogenic vessels - Cleanliness for cryogenic service (ISO 23208:2017)
EN ISO 4126-1:2004 Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2004)
EN ISO 4126-4:2004 Safety devices for protection against excessive pressure - Part 4: Pilot operated safety valves (ISO 4126-4:2004)
97/23/EC Painelaitteet 94/55/EC Vaarallisten aineiden tiekuljetuksia 96/49/EC Vaarallisten aineiden rautatiekuljetuksia 96/86/EC Vaarallisten aineiden tiekuljetuksia koskevan jäsenvaltioiden lainsäädännön lähentämisestä annetun neuvoston direktiivin 94/55/EY mukauttamisesta tekniikan kehitykseen neuvoston direktiivissä 96/86/EY annetun ilmoituksen mukaisesti 96/87/EC Vaarallisten aineiden rautatiekuljetuksia koskevan jäsenvaltioiden lainsäädännön lähentämisestä annetun neuvoston direktiivin 96/49/EY mukauttamisesta tekniikan kehitykseen 2008/68/EC Vaarallisten aineiden sisämaankuljetuksista 2014/68/EU