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Status : Active
Standard Type : Main
Document No : ISO 21013-1:2021
Document Year : 2021
Pages : 11
Edition : 2
Section Volume : Cryogenic vessels (ISO/TC 220.)
This document is applicable to valves not exceeding a size of DN 150 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 This document does not provide methods for determining the capacity of relief valve(s) for a particular cryogenic vessel. Such methods are provided in ISO 21013-3.