Hot Spot EN 1626 Cryogenic Vessels – Valves for cryogenic service
By BVAA’s Technical Consultant, Peter Churm
The 2013 systematic review has been launched on the following European standard of CEN/TC 268 “Cryogenic vessels”:
EN 1626:2008 “Cryogenic vessels - Valves for cryogenic service”
It’s scope specifies the requirements for the design, manufacture and testing of valves for cryogenic service, i.e. for operation with cryogenic fluids below - 10 °C 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 including vacuum jacketed cryogenic valves.
This European 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 a pressure rating (PN or Class). Valves may then be selected with a PN or Class equal to or greater than the maximum allowable pressure (PS) of the equipment with which it is to be used.
NOTE 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).
Voting is requested on the following options:
- Standard to continue unchanged in us for a further 5 years
- Standard required revision
- Standard should be deleted
Any comments from BVAA members should be directed to BVAA for onward submission to BSI who will respond to CEN/TC 268 on behalf of UK.
Published in Valve User Magazine Issue 24
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