Table of Contents

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Qualification and testing
6 Determination of the certified coefficient of
   discharge (Kdr)
7 Set pressure tolerances
8 Re-seating pressure
9 Cleanliness
10 Marking
11 Sealing
Bibliography

Abstract

Describes the requirements for the design, manufacture and testing of pilot operated pressure relief valves for cryogenic service, i.e. for operation with cryogenic fluids in addition to operation at temperatures from ambient to cryogenic.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 220
Supersedes	ISO/DIS 21013-4 : 60.00 (2012)