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STANDARD 4437-3
Second edition
Plastics piping systems for the supply
of gaseous fuels — Polyethylene
(PE) —
Part 3:
Fittings
Systèmes de canalisations en plastique pour la distribution de
combustibles gazeux — Polyéthylène (PE) —
Partie 3: Raccords
PROOF/ÉPREUVE
Reference number
ISO 4437-3:2023(E)
© ISO 2023
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ISO 4437-3:2023(E)
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© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
PROOF/ÉPREUVE © ISO 2023 – All rights reserved
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ISO 4437-3:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
3.1 Terms related to geometry . 3
3.2 Terms related to material . 4
3.3 Terms related to material characteristics . 5
3.4 Terms related to service conditions . 5
3.5 Terms related to joints . 6
4 Symbols and abbreviated terms.7
4.1 Symbols . 7
4.2 Abbreviated terms . 8
5 Material. 9
5.1 PE compound for fittings . 9
5.2 Material for non-polyethylene parts . 9
5.2.1 General . 9
5.2.2 Metal parts . 9
5.2.3 Sealing materials .
...