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
Current Stage
9093 - International Standard confirmed
Completion Date
06-Jun-2024
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ISO 21159:2018 - Ships and marine technology -- Butterfly valves for use in low temperature applications -- Design and testing requirements
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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

---------------------- Page: 1 ----------------------
ISO 21159:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
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 .
...

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