BS EN ISO 28921-2:2017

BS EN ISO 28921-2:2017 specifies requirements for the type testing of isolating valves for low-temperature applications to verify the performance of valves at a low temperature from - 50 °C down to - 196 °C.

NOTE Nominal sizes (DN), nominal pipe sizes (NPS), nominal pressure (PN) and Classes are covered in ISO 28921-1.

This part of ISO 28921 does not evaluate valve actuators unless they are integral part of the valve.

Valves during testing can be operated manually or an actuator can be used 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 part of ISO 28921 does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.


Cross References:
ISO 5208
ISO 28921-1
ASME B31.3
EN 13480-2
ISO 6002
ISO 6708
ISO 7121
ISO 7268
ISO 10434
ISO 10497
ISO 10631
ISO 12149
ISO 14313
ISO 15761
ISO 17292
ISO 21011
ISO 23208
ASME B16.34


Incorporates the following:
Corrigendum, March 2017 See more