标准编号：ISO 28921-2:2015
中文名称：工业阀门 低温用隔离阀 第2部分：型式试验
英文名称：Industrial valves — Isolating valves for low-temperature applications — Part 2: Type testing
发布日期：2015-11
标准范围
This part of ISO 28921 specifies requirements for the type testing of isolating valves for low-temperatureapplications 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 inISO 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 effectof cold gas vapours during testing is taken into consideration in particular if the actuator is mounteddirectly 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 withISO 21011, used with cryogenic vessels.
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