Hot Spot Publication of ISO 28921-1 Isolating Valves for Low-temperature Applications- Design Manufacture and Production Testing
What is it?
ISO 28921-1:2022 Isolating valves for low-temperature applications — Part 1: Design, manufacturing and production testing has now been published by BSI as BS EN ISO 28921-1:2022 and is available to purchase.
This document specifies the requirements for the design, manufacture and testing of gate, globe, ball / plug and butterfly valve types used as isolation and check valves for low and cryogenic temperature service between −50 °C and −196°C.
The revised standard now covers isolating valves of sizes DN:10 – 1,800 (NPS 3/8 - 72) and extended pressure designations PN16 – 400 and Class 150 – 2500. This document excludes safety valves and control valves and it does not apply to valves for cryogenic vessels which are designed in accordance with ISO 21011.
Why is it Important?
This revised standard extends the size range and pressure designations of the first edition, and now clearly excludes control valves and safety valves from its scope.
Annex A covering production testing has been updated and changes have also been made to the referenced type testing procedures covered by ISO 28921-2 which is also currently under revision by ISO TC 153.
If you are involved in the design and manufacture of cryogenic valves this standard contains requirements that may directly affect your products and business.
This second edition will cancel and replace ISO 28921-1:2013.
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Published: 17th August 2022
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