ISO 19037:2019

INTERNATIONAL ISO
STANDARD 19037
First edition
2019-06
Ships and marine technology — Gate
valves for use in low temperature
applications — Design and testing
requirements
Navires et technologie maritime — Robinets vannes destinés aux
applications à basse température — Exigences de conception et d'essai
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure-temperature rating . 3
4.1 Types of fluids . 3
4.2 Working pressure and design temperature . 3
5 Design . 4
5.1 General structure of a gate valve . 4
5.2 Materials general . . 4
5.3 Types and materials of body . 4
5.3.1 Types . 4
5.3.2 Manufacturing . 4
5.4 Design and materials of extended bonnet . 5
5.4.1 Design . 5
5.4.2 Materials . 6
5.5 Design types and materials of wedge . 6
5.5.1 Design . 6
5.5.2 Materials . 6
5.6 Types and materials of stem . 7
5.6.1 Design . 7
5.6.2 Materials . 7
5.7 Stem sealing . 7
5.8 Types and materials of a seat ring . 7
5.8.1 Design . 7
5.8.2 Materials . 7
5.9 Types and materials of bolts and nuts . 7
5.9.1 Design . 7
5.9.2 Materials . 8
5.10 Requirements of driving system and operating devices . 8
5.11 Surface treatment . 8
6 Welding heat treatment . 8
6.1 Welding . 8
6.2 Heat treatment . 9
7 Test and inspection . 9
7.1 Material test . 9
7.2 Non-destructive inspection . 9
7.2.1 Radiographic testing (RT) . 9
7.2.2 Penetrant testing (PT) .10
7.2.3 Ultrasonic testing (UT) .10
7.2.4 Retest .10
7.3 Dimension check .10
7.4 Visual inspection .10
7.5 Heat treatment inspection .10
7.6 Operating tests .11
7.7 Pressure tests, back seat tests and leak tests .11
7.7.1 Pressure tests.11
7.7.2 Back seat tests .11
7.7.3 High-pressure pneumatic shell test .12
7.8 Fire safety test .12
7.9 Cryogenic tests .12
7.9.1 Scope of tests .12
7.9.2 Test procedure .12
7.9.3 Submission of test result .14
8 Marking .14
Annex A (informative) Cryogenic gate valve — Example .15
Bibliography .16
iv © ISO 2019 – All rights reserved

Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 3, Piping and machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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INTERNATIONAL STANDARD ISO 19037:2019(E)
Ships and marine technology — Gate valves for use in
low temperature applications — Design and testing
requirements
...