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BS ISO 4437-4:2022

BS ISO 4437-4:2022

$142.49

Plastics piping systems for the supply of gaseous fuels. Polyethylene (PE) – Valves

Published By Publication Date Number of Pages
BSI 2022 30
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
3.1 General
11 3.2 Terms relating to design
4 Symbols and abbreviations
5 Material
5.1 Material for polyethylene parts
12 5.2 Material for non-polyethylene parts
5.2.1 General
5.2.2 Metal parts
5.2.3 Sealing materials
5.2.4 Greases and lubricants
5.2.5 Assembly
13 6 General characteristics
6.1 Appearance of the valve
6.2 Colour
6.3 Design
6.3.1 General
6.3.2 Valve body
6.3.3 Valve ends
6.3.4 Operating device
6.3.5 Seals
7 Geometrical characteristics
7.1 General
14 7.2 Measurement of dimensions
7.3 Dimensions of spigot ends for valves
7.4 Dimensions of valves with electrofusion sockets
7.5 Dimensions of the operating device
8 Mechanical characteristics of assembled valves
8.1 General
8.2 Requirements
8.2.1 General
21 8.2.2 Air flow rate
9 Physical characteristics
9.1 Conditioning
22 9.2 Requirements
10 Performance requirements
11 Technical file
23 12 Marking
12.1 General
12.2 Minimum required marking
12.3 Additional marking
24 13 Delivery conditions
25 Annex A (normative) Determination of the leaktightness of seat(s) and packing
27 Annex B (normative) Test method for leaktightness and ease of operation after tensile loading
29 Bibliography

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BS ISO 4437-4:2022
$142.49