AS 2638.1-2002

1 - AS 2638.1-2002 GATE VALVES FOR WATERWORKS PURPOSES - METAL SEATED
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
6 - 1.3 DEFINITIONS
6 - 1.3.1 Allowable operating pressure
6 - 1.3.2 Allowable test pressure
6 - 1.3.3 Bulkhead test
6 - 1.3.4 Class
7 - 1.3.5 Coating
7 - 1.3.6 Coating defect
7 - 1.3.7 Distortion
7 - 1.3.8 DN (nominal size)
7 - 1.3.9 Effective length
7 - 1.3.10 Face to face dimensions
7 - 1.3.11 Free end test
7 - 1.3.12 Maximum allowable gearbox input torque
7 - 1.3.13 Maximum allowable operating pressure
7 - 1.3.14 Maximum functional test torque
7 - 1.3.15 Maximum operator input torque
7 - 1.3.16 Maximum possible input torque
7 - 1.3.17 Maximum operating temperature
7 - 1.3.18 Minimum strength test torque
7 - 1.3.19 Non-rising spindle design
8 - 1.3.20 Rising spindle design
8 - 1.3.21 Type test
8 - 1.4 DESIGNATION OF SIZE
8 - 1.5 ALLOWABLE PRESSURES
9 - SECTION 2 MATERIALS AND COMPONENTS
9 - 2.1 MATERIALS
9 - 2.2 DEZINCIFICATION-RESISTANT MATERIALS
9 - 2.3 CONTAMINATION OF WATER
9 - 2.4 O-RINGS (ELASTOMERIC TOROIDAL SEALING RINGS)
11 - SECTION 3 DESIGN
11 - 3.1 GENERAL
11 - 3.2 DIMENSIONS
11 - 3.3 END CONNECTIONS
11 - 3.3.1 General
11 - 3.3.2 Flanged ends
11 - 3.3.3 Socket ends
11 - 3.3.4 Spigot ends
11 - 3.3.5 Shouldered or grooved ends
11 - 3.4 GATE
11 - 3.4.1 Gate guides
12 - 3.4.2 Gate travel
12 - 3.5 COMPONENT JOINTING
12 - 3.5.1 Connections
12 - 3.5.2 Fasteners
12 - 3.6 WATERWAY
12 - 3.6.1 Waterway
12 - 3.6.2 Metal rings
12 - 3.7 SPINDLE
12 - 3.7.1 Spindle diameter
12 - 3.7.2 Spindle thread
12 - 3.7.3 Spindle sealing
13 - 3.7.4 Thrust collar
13 - 3.7.5 Spindle seal retainer
13 - 3.8 OPERATION
13 - 3.8.1 General
13 - 3.8.2 Spindle cap and key
13 - 3.8.3 Extension Spindle
13 - 3.8.4 Handwheels
13 - 3.8.5 Direction of closure
13 - 3.9 LIFTING DEVICES
13 - 3.10 SUPPORT FEET
18 - SECTION 4 COATINGS
18 - 4.1 GENERAL
18 - 4.2 DESIGN
19 - SECTION 5 TESTING
19 - 5.1 TYPE TESTS
19 - 5.1.1 General
19 - 5.1.2 Strength test (spindle, nut and cap) (Test A)
19 - 5.1.3 Body pressure test (Test B)
19 - 5.1.4 Gate strength test (Test C)
19 - 5.1.5 Torque test (Test D)
20 - 5.1.6 Valve seat test (Test E)
20 - 5.1.7 Sensitivity test (Test F)
20 - 5.1.8 Functional test (Test G)
20 - 5.1.9 Spindle seal replacement or repair test (Test H)
21 - 5.1.10 Final inspection
21 - 5.1.11 Strength test (valve key) (Test 1)
21 - 5.1.12 Strength test (spindle extension) (Test J)
21 - 5.2 PRODUCTION TESTS
21 - 5.2.1 General
21 - 5.2.2 Body test (Test 1)
21 - 5.2.3 Valve seat test (Test 2)
22 - 5.2.4 Coating tests
23 - SECTION 6 GEARBOXES
23 - 6.1 DESIGN
23 - 6.1.1 Gearbox
23 - 6.1.2 Gearbox selection
23 - 6.1.3 Geared valves
23 - 6.2 COATINGS
23 - 6.3 MARKINGS
24 - SECTION 7 MARKING AND PACKAGING
24 - 7.1 BODY MARKINGS
24 - 7.2 VALVE KEY AND SPINDLE EXTENSION MARKINGS
24 - 7.3 DIRECTION OF CLOSURE FOR HANDWHEELS AND CAPS
24 - 7.4 PACKAGING
25 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
25 - A1 SCOPE
25 - A2 RELEVANCE
25 - A3 PRODUCT CERTIFICATION
25 - A4 TESTING
25 - A4.1 General
25 - A4.2 Retesting
26 - A4.3 Valve batch
26 - A4.4 Production batch
26 - A4.5 Lot
26 - A4.6 Sample
26 - A4.7 Sampling plan
26 - A4.8 Batch release test (BRT)
26 - A4.9 Type testing (TT)
29 - APPENDIX B - PURCHASING GUIDELINES
29 - B1 GENERAL
29 - B2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
31 - B3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
31 - B4 MATTERS FOR AGREEMENT BETWEEN THE PURCHASER AND THE MANUFACTURER
32 - APPENDIX C - REFERENCED DOCUMENTS
34 - APPENDIX D - ALTERNATIVE MATERIAL REQUIREMENTS
35 - APPENDIX E - GUIDELINES FOR GEARBOX SELECTION AND APPLICATION
35 - E1 GENERAL
35 - E2 INFORMATION REQUIRED FOR GEARBOX SELECTION
35 - E3 TORQUE REQUIREMENTS OF A VALVE
35 - E3.1 General
36 - E3.2 Cracking torque
36 - E3.3 Running torque
36 - E4 STANDARD GEARBOX RATIOS
36 - E5 GEARBOX RATIO SELECTION
37 - E6 FINAL CHECK

This Standard specifies requirements for Class 16 and Class 35 solid gate metal-bodied and metal-seated gate valves for waterworks purposes, with a maximum operating temperature of 40 degrees Celsius.

This Standard specifies requirements for Class 16 and Class 35 solid gate metal-bodied metal-seated gate valves for waterworks purposes, with a maximum operating temperature of 40°C. This Standard is applicable to the following versions (a) Valves of nominal sizes DN 80 to DN 900 with inside screw and non-rising spindle design, operated by a removable key, with or without a gearbox, for buried applications.(b) Valves of nominal size DN 80 to DN 900 with inside screw and non-rising spindle design, operated by a handwheel, with or without a gearbox, for above-ground applications.(c) Valves of nominal size DN 80 to DN 300 with outside screw and rising spindle design, operated by a handwheel, for above-ground applications where the position of the gate is required to be visible.The design criteria of the valve and fasteners should be based on a minimum life expectancy of 50 years.Means for demonstrating compliance with this Standard are given in Appendix ANOTE: Purchasing guidelines are given in Appendix B.

First published as AS 2638-1983.
Revised and redesignated as Int 88006-1988.
Int 88006-1988 withdrawn 1988.
AS 2638-1983 revised 1988.
Third edition 1991.
AS 2638-1991 revised and redesignated in part as AS 2638.1-1999.
Second edition 2002.