ISO 21159:2018

Ships and marine technology — Butterfly valves for use in low temperature applications — Design and testing requirements

This document specifies requirements for design, manufacture, and test methods of cryogenic butterfly valves in order to have an excellent quality leakage stability in a very low temperature service (−196 °C to 80 °C). It is applicable to valves of nominal sizes: DN: 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600 corresponding to nominal pipe size (NPS): 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.

Navires et technologie maritime — Robinets à papillon destinés aux applications à basse température — Exigences de conception et d'essai

General Information

• Status: Published
• Publication Date: 28-Oct-2018
• ICS: 47.020.30 - Piping systems
• Technical Committee: ISO/TC 8/SC 3 - Piping and machinery
• Drafting Committee: ISO/TC 8/SC 3 - Piping and machinery
• Current Stage: 9060 - Close of review
• Start Date: 04-Jun-2029

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21159
First edition
2018-11
Ships and marine technology —
Butterfly valves for use in low
temperature applications — Design
and testing requirements
Navires et technologie maritime — Robinets à papillon destinés aux
applications à basse température — Exigences de conception et d'essai
Reference number
ISO 21159:2018(E)
©
ISO 2018

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ISO 21159:2018(E)

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© ISO 2018
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Published in Switzerland
ii © ISO 2018 – All rights reserved

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ISO 21159:2018(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure-temperature rating . 3
5 Structure . 3
5.1 General . 3
5.1.1 Structure . 3
5.1.2 Materials . 4
5.2 Design and materials of the body. 4
5.2.1 Design . 4
5.2.2 Materials . 4
5.2.3 Manufacturing . 4
5.3 Design and materials of the extended bonnet . 5
5.3.1 Design . 5
5.3.2 Materials . 5
5.4 Design and materials of the disc . 5
5.4.1 Design . 5
5.4.2 Materials .
...