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ČSN EN ISO 28921-2 (133045)
Industrial valves - Isolating valves for low-temperature applications - Part 2: Type testing
Translate name
STANDARD published on 1.8.2017
The information about the standard:
Designation standards: ČSN EN ISO 28921-2
Classification mark: 133045
Catalog number: 502513
Publication date standards: 1.8.2017
SKU: NS-689186
The number of pages: 32
Approximate weight : 96 g (0.21 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
The category - similar standards:
Annotation of standard text ČSN EN ISO 28921-2 (133045):
This part of ISO 28921 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
Preview of the standard ČSN EN ISO 28921-2 (133045)
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