CSN EN ISO 28921-1

CSN EN ISO 28921-1 This part of ISO 28921 specifies requirements for design, dimensions, material, fabrication and production testing of isolation valves for low-temperature applications. It applies to gate, globe, check, butterfly and ball valves and can be used for other valve types used in low-temperature services. This part of ISO 28921 covers isolation valves for use in cryogenic temperature service where the design low-temperature service is -50 °C down to -196 °C. This part of ISO 28921 does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.