BS EN 13648-1 is a technical specification that specifies the requirements for the design, manufacture, and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids (as defined in EN 1251-1) below – 10 °C in addition to operation at ambient temperature. BS EN 13648-1 requires that the valves comply with EN ISO 4126-1 or EN ISO 4126-4. In the event of different requirements, the requirements for cryogenic service are applied. BS EN 13648-1 is restricted to valves not exceeding a size of DN 100 for category B. The valves of category A are limited to DN 25 and set pressures up to 40 bars. Both categories are designed to relieve single-phase vapours or gases. A valve can be specified, constructed, and tested such that it is suitable for use with more than one gas or with mixtures of gases.
Note 1: A cryogenic fluid (refrigerated liquefied gas) is a gas that is partially liquid because of its low temperature (including totally evaporated liquids and supercritical fluids).
Note 2: BS EN 13648-1 does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in EN 13648-3.
BS EN 13648-1 on safety valves for cryogenic service is useful for:
A cryogenic valve is often designed to react to high pressure by opening the valve, allowing gas or other media to flow freely through it. BS EN 13648-1 guides you with requirements and test methods for the manufacturing and assembling of safety valves for cryogenic service. The aim of BS EN 13648-1 is to keep cryogenic gases or other mediums secure and safe, cryogenic valves are kept in a naturally closed condition.
Using BS EN 13648-1 allows users to practice safety and protection as a cryogenic valve is frequently constructed to open in response to high pressure, allowing gas or other media to freely flow through it. BS EN 13648-1 guides you with test methods to assess the durability and quality management for the safety valves.
EN 13648-1:2008