This standard specifies the requirements for the design, manufacture and testing of valves for cryogenic service, i.e. for operation with cryogenic fluids (as defined in prEN 1251-1:1995) below -10 ℃ as well as at ambient conditions, to allow for start-up and run-down. It specifies additional requirements for cryogenic service for the appropriate valve product standard.
It applies to sizes up to DN 150 and vacuum-jacketed cryogenic valves.
This standard is not applicable to safety valves and valves for liquefied natural gas (LNG).
It is intended that the valve be designed and tested to satisfy the generally accepted nominal pressure, e.g. PN 40. Valves may then be selected with a PN equal to or greater than the maximum allowable pressure (PS) of the equipment with which they are to be used.
BS EN 1626:1999 history
2009BS EN 1626:2008 Cryogenic vessels - Valves for cryogenic service
1999BS EN 1626:1999 Cryogenic vessels - Valves for cryogenic service