AS 3578-1993

1 - AS 3578-1993 CAST IRON NON-RETURN VALVES FOR GENERAL PURPOSES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Non-return 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 (DN)
7 - 1.4 VALVE TYPE
7 - 1.5 DESIGNATION OF SIZE
7 - 1.6 CLASSIFICATION AND RATING
7 - 1.7 TEMPERATURE RATINGS
8 - SECTION 2 MATERIALS AND COMPONENTS
8 - 2.1 MATERIALS
8 - 2.2 DEZINCIFICATION-RESISTANT MATERIALS
10 - SECTION 3 DESIGN AND MANUFACTURE
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 and cover
10 - 3.2.2 Body end ports
10 - 3.2.3 Bore of valve
10 - 3.2.4 Body tappings
10 - 3.2.5 Body-to-cover connection
11 - 3.2.6 Seat closure
11 - 3.2.7 Hinge to disc connection
11 - 3.2.8 Plugs
11 - 3.3 FINISH
11 - 3.4 PROTECTIVE COATINGS FOR CLASS 16 VALVES
11 - 3.4.1 Bitumen coatings
11 - 3.4.2 Standard bitumen coatings
11 - 3.4.3 Polymeric coatings
15 - SECTION 4 TESTING
15 - 4.1 GENERAL
15 - 4.2 TEST PRESSURES
15 - 4.3 TEST DURATION
15 - 4.4 TYPE OF TEST
15 - 4.4.1 ‘Closed-end’ test (bulkhead testing condition)
15 - 4.4.2 ‘Open-end’ test (free-end testing condition)
15 - 4.5 TEST PROCEDURE
15 - 4.5.1 General
15 - 4.5.2 Body test
15 - 4.5.3 Valve seat test
17 - SECTION 5 MARKING
17 - 5.1 BODY MARKINGS
17 - 5.2 ADDITIONAL INFORMATION
17 - 5.2.1 Information to be marked
17 - 5.2.2 Valve marking plate detail
18 - APPENDIX A - PURCHASING GUIDELINES
18 - A1 GENERAL
18 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
18 - A3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
18 - A4 MATTERS FOR AGREEMENT BETWEEN PURCHASER AND THE MANUFACTURER
19 - APPENDIX B - INSTALLATION
19 - B1 INSTALLATION LIMITATIONS

Specifies requirements for valves in the general water industry in both buried and above-ground installations in a nominal size range of DN 50 to DN 600.

This Standard specifies requirements for flanged, shouldered and grooved end, cast iron non-return valves, copper alloy faced, stainless steel faced, or all-iron for general water industry purposes in both buried and above-ground installations, in nominal sizes DN 50 to DN 600. The valves can be installed in either a horizontal or vertical position.NOTE: Guidelines for purchasers on requirements that must or may need to be agreed upon at time of enquiry or order are given in Appendix A.

First published as AS 3578-1988.
Second edition 1993.