AS 1718-1992

1 - AS 1718-1992 WATER SUPPLY - COPPER ALLOY SCREW-DOWN PATTERN TAPS - SPECIFIED BY DIMENSIONS
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 Isolating tap
6 - 1.3.2 Rising spindle tap
6 - 1.3.3 Tap body
6 - 1.3.4 Tap head
6 - 1.3.5 Tapset breaching piece assembly
6 - 1.3.6 Washing machine tap
6 - 1.3.7 Water supply pipework
6 - 1.3.8 Water passageway
6 - 1.3.9 Normative
6 - 1.4 DESIGNATION OF NOMINAL SIZE
6 - 1.5 MARKING
6 - 1.5.1 Space for mark of certifying body
6 - 1.5.2 Marking requirements
7 - SECTION 2 MATERIALS
7 - 2.1 SCOPE OF SECTION
7 - 2.2 COPPER
7 - 2.3 COPPER ALLOY
7 - 2.4 DEZINCIFICATION-RESISTANT COPPER ALLOY
7 - 2.5 STAINLESS STEEL
7 - 2.6 OTHER MATERIALS
7 - 2.7 CORROSION-RESISTANT METALLIC MATERIALS
7 - 2.8 USE OF MATERIALS
7 - 2.9 CONTAMINATION OF WATER
9 - SECTION 3 DESIGN AND MANUFACTURE
9 - 3.1 SCOPE OF SECTION
9 - 3.2 END CONNECTORS
9 - 3.2.1 Threaded end connectors
9 - 3.2.2 Union end connectors
9 - 3.2.3 Hose tap connection ends
9 - 3.2.4 Compression ends
9 - 3.2.5 Capillary ends
9 - 3.2.6 Tubular ends
9 - 3.3 INTERCHANGEABILITY OF PARTS
9 - 3.4 SPINDLES
9 - 3.5 FERRULE STOP TAPS AND FOOTPATH STOP TAPS
9 - 3.6 SCREW THREADS
9 - 3.6.1 General
9 - 3.6.2 Pipe threads
9 - 3.6.3 Other screw threads
9 - 3.6.4 Thread engagement
10 - 3.7 VALVE SEATING
10 - 3.7.1 General
10 - 3.7.2 Dimensions
10 - 3.7.3 Machining
10 - 3.7.4 Removable tap seats
10 - 3.8 JUMPER VALVES
10 - 3.8.1 Design
10 - 3.8.2 Construction
10 - 3.9 THICKNESS OF METAL PARTS
10 - 3.9.1 General
10 - 3.9.2 Tubular materials
10 - 3.9.3 Other sections
10 - 3.9.4 Zinc alloy die castings
10 - 3.10 FABRICATED FITTINGS
11 - 3.11 OUTLETS
11 - 3.11.1 General
11 - 3.12 HANDLES
11 - 3.12.1 General
11 - 3.12.2 Dimensions
11 - 3.12.3 Attachment
11 - 3.12.4 Taps not fitted with a handle
11 - 3.13 COVERS
11 - 3.14 BACK NUTS
11 - 3.15 TAPSET BREACHING PIECE ASSEMBLIES
11 - 3.16 METAL AND OTHER SURFACE FINISHES
11 - 3.16.1 Chromium and nickel plating
11 - 3.16.2 Other metal finishes
11 - 3.16.3 Other finishes
11 - 3.17 FINISH
11 - 3.18 DIMENSIONS
27 - SECTION 4 PERFORMANCE REQUIREMENTS
27 - 4.1 WATERTIGHTNESS
27 - 4.2 FLOW CAPABILITY
27 - 4.3 STRENGTH OF HANDLE ATTACHMENT
27 - 4.4 RESISTANCE OF HANDLE TO REMOVAL
27 - 4.5 STRENGTH OF FABRICATED JOINTS
27 - 4.6 STRENGTH OF BACK NUTS
28 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
30 - APPENDIX B - METHOD FOR TORQUE TEST ON FABRICATED FITTINGS
30 - B1 SCOPE
30 - B2 PRINCIPLE
30 - B3 APPARATUS
30 - B4 PROCEDURE
30 - B5 TEST REPORT
31 - APPENDIX C - METHOD FOR TORQUE TEST ON HANDLE AND HANDLE ATTACHMENT
31 - C1 SCOPE
31 - C2 PRINCIPLE
31 - C3 APPARATUS
31 - C4 PROCEDURE
31 - C5 TEST REPORT
32 - APPENDIX D - METHODS FOR DETERMINATION OF WATERTIGHTNESS
32 - D1 SCOPE
32 - D2 PRINCIPLE
32 - D3 APPARATUS
32 - D3.1 Pressurizing system
32 - D3.2 End connections
32 - D3.3 Pressure gauge
32 - D4 PROCEDURES
32 - D4.1 Hydrostatic test
33 - D4.2 Pneumatic test
33 - D5 TEST REPORT
34 - APPENDIX E - METHODS FOR MEASURING DIMENSIONS OF TAPS
34 - E1 SCOPE
34 - E2 PRINCIPLE
34 - E3 TEMPERATURE OF MEASUREMENT
34 - E4 APPARATUS
34 - E4.1 General
34 - E4.2 Alternative apparatus
34 - E5 TOLERANCES
34 - E6 PROCEDURES
34 - E6 TEST REPORT
35 - APPENDIX F - METHOD FOR DETERMINATION OF FLOW CAPABILITY OF TAPS
35 - F1 SCOPE
35 - F2 PRINCIPLE
35 - F3 APPARATUS
35 - F3.1 Water supply system
35 - F3.2 Pressure measurement
35 - F3.3 Flow rate measurements
35 - F4 PROCEDURE
35 - F5 TEST REPORT
37 - APPENDIX G - METHOD FOR TORQUE TEST ON BACK NUTS FOR BASIN PILLAR TAPS
37 - G1 SCOPE
37 - G2 PRINCIPLE
37 - G3 APPARATUS
37 - G4 PROCEDURE
37 - G5 TEST REPORT
38 - APPENDIX H - GENERAL INFORMATION ON FACTORS WHICH AFFECT THE RESISTANCE OF COPPER ALLOYS TO DEZINCIFICATION
38 - H1 GENERAL
38 - H2 NATURE OF DEZINCIFICATION
38 - H3 MEANS OF ACHIEVING DEZINCIFICATION RESISTANCE
38 - H3.1 General
38 - H3.2 Heat treatment of duplex copper alloys
39 - H4 THE EFFECT OF BRAZING ON DEZINCIFICATION RESISTANCE

Specifies requirements for copper alloy screw-down pattern draw-off taps and delivery taps with loose jumper valves, in a range of nominal sizes from DN 10 to DN 50 inclusive with continuous working pressures not exceeding 1.4 MPa and continuous operating temperatures not exceeding 95 degrees Celsius.

This Standard specifies requirements for copper alloy screw-down pattern taps and tapsets which incorporate loose jumper valves, in a range of nominal sizes from DN 10 to DN 50 inclusive with continuous working pressures not exceeding 1.4 MPa and continuous working temperatures not exceeding 95C.It also specifies requirements for outlets which are an integral part of a tap or mixing tap and the requirements for tapset breaching piece assemblies.Outlets which are a removable part of a tap or mixing tap are currently not covered by this Standard but are likely to become part of this Standard from 1st January 1994.

First published as AS B1-1928T.
Revised and redesignated AS B35-1931.
Second edition 1965.
Third edition 1969.
Revised and redesignated AS 1718-1975.
Revised in part and issued as AS 1718-1988.
Third edition 1992.