Standard
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AS 4793:2020
[Current]Mechanical tapping bands for waterworks purposes
This Standard specifies requirements for design, materials, and performance in service of PN 16 mechanical tapping bands used for the connection of property service pipes to reticulation water mains.
Published: 17/01/2020
Pages: 26
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
2.1 Material requirements
2.2 Dezincification-resistant materials
2.3 Stainless steel
2.4 Plastics materials long term performance
2.5 Coating
2.6 Elastomeric seals
2.7 Effect on water
3 Design
3.1 Tapping band components
3.2 Plastics tapping bands
3.3 Fitment
3.4 Tapping band types
3.4.1 Type F tapping bands
3.4.2 Type R tapping bands
3.5 Means of attachment
3.6 Fasteners
3.7 Outlets
3.8 Bi-metallic contact
3.9 Freedom from defects
4 Testing
4.1 Type tests
4.1.1 General
4.1.2 Assembly test
4.1.3 Leaktightness test during application of a bending moment to the connecting pipe
4.1.4 Joint infiltration test
4.1.5 Short-term hydrostatic leaktightness test
4.1.6 Long-term hydrostatic leaktightness test for plastics tapping bands
4.1.7 Resistance to rotation, longitudinal sliding and depressurization test
4.2 Bi-metallic couple test
4.3 Integrated assembly
4.3.1 Hydraulic performance
4.3.2 Assessment of cutter efficiency
4.4 Manufacturing process test
5 Marking and packaging
5.1 Marking
5.2 Packaging
5.3 Installation instructions
Appendix A
A.1 Scope and general
A.1.1 Scope
A.1.2 General
A.2 Testing
A.2.1 General
A.2.2 Testing
A.2.3 Retesting
Appendix B
B.1 Scope and general
B.1.1 Scope
B.1.2 General
B.2 Apparatus
B.3 Material
B.4 Procedure
B.5 Test report
Appendix C
C.1 Scope and general
C.1.1 Scope
C.1.2 General
C.2 Apparatus
C.3 Material
C.4 Procedure
C.5 Test report
Appendix D
D.1 Scope and general
D.1.1 Scope
D.1.2 General
D.2 Apparatus
D.3 Material
D.4 Procedure
D.4.1 Resistance to rotational sliding
D.4.2 Resistance to axial sliding
D.5 Test report
Appendix E
E.1 Scope and general
E.1.1 Scope
E.1.2 General
E.2 Apparatus
E.3 Materials
E.4 Procedure
E.5 Test report
Bibliography
Cited references in this standard
[Current]
Pipe threads where pressure-tight joints are made on the threads, Part 1: Dimensions, tolerances and designation
[Current]
Methods of test for plastics pipes and fittings, Method 8: Method of testing the leaktightness of assemblies
ASTM A380/A380M
Standard practice for cleaning, descaling, and passivation of stainless steel parts, equipment and systems
[Current]
Plain washers for metric bolts, screws and nuts for general purposes, Part 1: General plan
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