Standard
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AS 6401:2022
[Current]Knife-gate valves for waterworks purposes
AS 6401:2022 provides material requirements and performance tests for knife-gate valves in waterworks systems for drinking water, non-drinking water and wastewater and the means for demonstrating conformance to this document.
Published: 21/10/2022
Pages: 18
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Designation of size
1.5 Allowable pressures
2 Materials and components
2.1 General
2.2 Corrosion-resistant materials
2.3 Contamination of water
3 Design
3.1 General
3.2 End connections
3.2.1 General
3.2.2 Welding
3.3 Dimensions
3.4 Gate
3.4.1 General
3.4.2 Guides
3.4.3 Gate travel
3.4.4 Gland sealing
3.5 Component connections
3.6 Spindle
3.6.1 Spindle strength
3.6.2 Spindle thread
3.6.3 Spindle sealing
3.7 Lifting devices
3.8 Fasteners
3.9 Operation
3.9.1 General
3.9.2 Hand wheels
3.9.3 Direction of closure
4 Performance tests
4.1 General
4.2 Type tests
4.2.1 General
4.2.2 Body pressure test
4.2.3 Spindle, nut and gate connection strength test
4.2.4 Gate strength test
4.2.5 Valve seat test
4.2.6 Sensitivity test
4.2.7 Functional test
4.3 Production tests
4.3.1 General
4.3.2 Body test
4.3.3 Valve seat test
5 Protective coatings
5.1 General
5.2 Components
6 Marking and packaging
6.1 Body markings
6.2 Packaging
Appendix A
A.1 Scope
A.2 Relevance
A.3 Minimum sampling and testing frequency plan
A.3.1 General
A.3.2 Testing
A.3.3 Retesting
Appendix B
B.1 General
B.2 Information to be supplied by the purchaser
B.3 Information to be supplied by the manufacturer
B.4 Matters for agreement between the purchaser and the manufacturer
Bibliography
Cited references in this standard