ISO 21013-4:2012 PDF

Scope: This part of ISO 21013 specifies the reduirements for the design, manufacture and testing of pilot operated pressure-relief valves for cryogenic service, ij.e. for operation with cryogenic fluids in addition to operation at temperatures from ambient to cryogenic. This part of ISO 21013 is restricted to valves not exceeding a Size of DN 300 designed to relieve single phase vapours, gases, or mixtures of gases and/or vapours， This part of ISO 21013 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.

ISO 21013-4:2012 Referenced Document

ASME B16.34 Valves Flanged, Threaded and Welding End
EN 12516-2:2004 Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells
EN 12516-3:2002 Valves - Shell design strength - Part 3: Experimental method*， 2024-04-19 Update
EN 12516-4:2008 Industrial valves - Shell design strength - Part 4: Calculation method for valve shells manufactured in metallic materials other than steel
ISO 21028-1 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 1: Temperatures below -80 degrees C*， 2016-09-01 Update
ISO 21028-2 Cryogenic vessels - Toughness requirements for materials at cryogenic temperature - Part 2: Temperatures between -80 degrees C and -20 degrees C*， 2018-03-01 Update
ISO 4126-4:2004 Safety devices for protection against excessive pressure - Part 4: Pilot-operated safety valves

2019 ISO 21013-4:2012/Amd 1:2019 Cryogenic vessels — Pilot operated pressure relief devices — Part 4: Pressure-relief accessories for cryogenic service — Amendment 1
2012 ISO 21013-4:2012 Cryogenic vessels - Pilot operated pressure relief devices - Part 4: Pressure-relief accessories for cryogenic service