Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
FOREWORD
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 OBJECTIVE
1.4 NEW DESIGNS AND INNOVATIONS
1.5 APPROVAL AND LISTINGS
1.6 REFERENCED DOCUMENTS
1.7 DEFINITIONS
2 REQUIREMENTS
2.1 NOMINAL SIZES
2.2 CONNECTIONS
2.3 RATED WORKING PRESSURES
2.4 BODIES AND COVERS
2.5 STRENGTH OF BODY
2.6 MECHANICAL STRENGTH
2.7 ACCESS FOR MAINTENANCE
2.8 COMPONENTS
2.9 NON-METALLIC COMPONENTS
2.10 SEALING ASSEMBLY ELEMENTS
2.11 CLEARANCES
2.12 OPERATING TORQUE
2.13 PROVISION FOR VALVE SECURITY
2.14 SPRINGS AND DIAPHRAGMS
2.15 OPERATIONAL PERFORMANCE
2.16 BACK PRESSURE
2.17 DURABILITY
2.18 LEAKAGE
3 TEST METHODS
3.1 BODY STRENGTH TEST
3.1.1 General
3.1.2 Procedure
3.2 MECHANICAL STRENGTH TEST
3.3 NON-METALLIC COMPONENTS TEST
3.3.1 Air-oven ageing—Excluding gaskets and seals
3.3.1.1 Test duration and temperature
3.3.1.2 Procedure
3.3.2 Warm water ageing—Excluding gaskets and seals (see Clause 2.9)
3.3.3 Test for sealing assembly seals
3.4 OPERATING TORQUE TEST
3.5 SPRING AND DIAPHRAGM TEST
3.6 OPERATIONAL TESTS
3.7 LEAKAGE TEST
3.7.1 Seat leakage test
3.7.2 Body leakage test
3.7.3 One year static leakage test
3.8 DURABILITY TEST
3.9 FIRE EXPOSURE TEST FOR PRESSURE-REDUCING VALVES MADE OF METALLIC MATERIALS WITH MELTING POINTS LESS THAN 800°C OR OF NON-METALLIC MATERIALS
4 MARKING
4.1 GENERAL
4.2 BODY MARKINGS
5 MANUFACTURER’S INSTRUCTIONS
Cited references in this standard
[Current]
Methods of test for elastomers, Method 11: Tension testing of vulcanized or thermoplastic rubber
Content history
AS 4118.1.8-1999 REC:2025
AS 4118.1.8-1999 Rec:2013
DR 98457