AS 3579-1993

1 - AS 3579-1993 CAST IRON WEDGE GATE VALVES FOR GENERAL PURPOSES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AN D GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Gate valve
7 - 1.3.2 Class
7 - 1.3.3 Maximum working pressure
7 - 1.3.4 Maximum working temperature
7 - 1.3.5 Face-to-face dimensions
7 - 1.3.6 Nominal size
7 - 1.4 DESIGNATION OF SIZE
7 - 1.5 PRESSURE CLASSIFICATION
8 - SECTI ON 2 MATERIALS AND COMPONENTS
8 - 2.1 MATERIALS
8 - 2.2 DEZINCIFICATION-RESISTANT MATERIALS
10 - SECTION 3 DESIGN, MANUFACTURE AND OPERATION
10 - 3.1 END CONNECTIONS
10 - 3.1.1 Flanged ends
10 - 3.1.2 Face-to-face dimensions
10 - 3.1.3 Shouldered ends
10 - 3.1.4 Grooved ends
10 - 3.2 COMPONENT DESIGN
10 - 3.2.1 Body-end ports
10 - 3.2.2 Body guides and wedge guides
10 - 3.2.3 Wedge travel
10 - 3.2.4 Body-to-bonnet connection
10 - 3.2.5 Stems (spindles)
10 - 3.2.6 Valve seats
10 - 3.2.7 Jointing material
10 - 3.2.8 Stem sealing
11 - 3.2.9 Dimensions
11 - 3.2.10 Stem and thrust collar
11 - 3.2.11 Wedge nut
11 - 3.2.12 Yokes
11 - 3.3 OPERATION
11 - 3.3.1 General
11 - 3.3.2 Direction
11 - 3.4 FINISH
16 - SECTION 4 TESTING
16 - 4.1 GENERAL
16 - 4.2 TEST PRESSURES
16 - 4.3 TEST DURATION
16 - 4.4 TYPES OF TEST
16 - 4.4.1 ‘Closed end’ test (bulkhead testing condition)
16 - 4.5 TEST PROCEDURE
16 - 4.5.1 General
16 - 4.5.2 Body test
16 - 4.5.3 Valve seat test
17 - SECTION 5 MARKING
17 - 5.1 BODY MARKINGS
17 - 5.2 DIRECTION OF CLOSURE
18 - APPENDIX A - PURCHASING GUIDE
18 - A1 GENERAL
18 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
18 - A3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
19 - A4 MATTERS FOR AGREEMENT BETWEEN PURCHASER AND THE MANUFACTURER