DIN EN 13648-1:2002-09

This European Standard specifies the requirements for the design, manufacture and testing of safety valves for cryogenic service, i.e. for operation with cryogenic fluids below -10 °C in addition to operation at ambient temperature. It is a requirement of this standard that the valves comply with prEN ISO 4126-1. In the event of different requirements, this standard takes precedence over that standard. This standard is restricted to valves not exceeding a size of DN 100 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 on e gas or with mictures of gases. Note: This standard does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in prEN 13648-3.