Hot Spot ISO/CD 28921-2

ISO CD 28921-2 Industrial valves – Isolating valves for low-temperature applications – Part 2: Type testing

During its last plenary meeting on 27 September 2013, ISO/TC 153/SC 1 adopted resolution to submit ISO 28921-2 to CD Enquiry – comments required by 6 February 2014

This International Standard specifies requirements for the type testing of low temperature type valves to verify the performance of valves at a low temperature from – 50 °C down to – 196 °C.

Refer to ISO 28921-1.concerning the coverage as far as the DN or NPS and PN or Class

This International Standard does not evaluate valve actuators unless they are integral part of the valve. Valves during testing may be operated manually or an actuator may be utilized during the testing. The effect of cold gas vapours during testing is taken into consideration in particular if the actuator is mounted directly over the test stand with the cold gases engulfing the actuator.

This International Standard does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.

Published: 6th March 2014