AS 3688-2005

1 - AS 3688-2005 WATER SUPPLY-METALLIC FITTINGS AND END CONNECTORS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
8 - 1.4 DEFINITIONS
8 - 1.4.1 Fabricated joint or fitting
8 - 1.4.2 Fastening pipe thread
8 - 1.4.3 Sealing pipe thread
8 - 1.4.4 Threaded-end connector
8 - 1.4.5 Union end connector
8 - 1.5 DESIGNATION OF SIZE
8 - 1.6 MARKING
8 - 1.6.1 Space for mark of certifying body
8 - 1.6.2 Components
8 - 1.6.3 Marking requirements
9 - 1.7 PRODUCT DOCUMENTATION
9 - 1.7.1 Product data
10 - SECTION 2 MATERIALS
10 - 2.1 SCOPE OF SECTION
10 - 2.2 MATERIALS IN CONTACT WITH DRINKING WATER
10 - 2.3 METALLIC MATERIALS
10 - 2.3.1 CORROSION-RESISTANT METALLIC MATERIALS
10 - 2.3.2 COPPER
10 - 2.3.3 COPPER ALLOY
10 - 2.3.4 DEZINCIFICATION-RESISTANT (DR) COPPER ALLOY
10 - 2.3.5 STAINLESS STEEL
11 - 2.4 PLASTIC COMPONENT MATERIALS
11 - 2.4.1 General
11 - 2.4.2 Acetal
11 - 2.4.3 'Not applicable'
11 - 2.5 OTHER COMPONENT MATERIALS
12 - SECTION 3 DESIGN AND DIMENSIONS
12 - 3.1 SCOPE OF SECTION
12 - 3.2 TUBE STOPS
12 - 3.3 SLIP FITTINGS
13 - 3.4 SPIGOTS
13 - 3.5 FIXING DEVICE
13 - 3.6 WATERWAYS
13 - 3.6.1 Copper and copper alloy
13 - 3.6.2 Stainless steel
13 - 3.7 THICKNESS OF METAL PARTS OF FITTINGS SPECIFIED BY DIMENSION
13 - 3.7.1 General
13 - 3.7.2 Minimum thickness of unspecified metal parts
15 - 3.8 SCREW THREADS
15 - 3.8.1 Screw-threaded sealing connections
15 - 3.8.2 Screw-threaded fastening connections
15 - 3.8.3 Thread engagement-Assembled joints
15 - 3.8.4 Other screw threads
16 - 3.9 FABRICATED FITTINGS
16 - 3.10 GEOMETRY OF FITTINGS
16 - 3.11 PLATING AND OTHER SURFACE FINISHES
16 - 3.12 FINISH AND WORKMANSHIP
17 - SECTION 4 PERFORMANCE REQUIREMENTS
17 - 4.1 SCOPE OF SECTION
17 - 4.2 WATERTIGHTNESS PRESSURE TEST
17 - 4.3 STRENGTH OF FABRICATED JOINT (TORQUE TEST)
17 - 4.4 STRENGTH OF JOINT ASSEMBLY (PRESSURE CYCLING TEST)
17 - 4.5 RESISTANCE TO PULL-OUT OF ASSEMBLED JOINTS
17 - 4.6 STRENGTH OF NUT AND ASSEMBLY (TORQUE TEST)
17 - 4.7 THERMAL CYCLING TEST FOR JOINTS CONTAINING NON-METALLIC COMPONENTS
17 - 4.8 WATERTIGHTNESS UNDER INTERNAL HYDROSTATIC PRESSURE WHILST SUBJECTED TO BENDING
18 - 4.9 METHOD FOR DETERMINING COMPATIBILITY OF FITTINGS WITH PIPE
18 - 4.10 ROLL-GROOVED ASSEMBLY (JOINT PRESSURE RESISTANCE TEST)
19 - SECTION 5 CAPILLARY FITTINGS-COPPER AND COPPER ALLOY
19 - 5.1 SCOPE OF SECTION
19 - 5.2 DESIGN AND DIMENSIONS
19 - 5.2.1 General
19 - 5.2.2 Internal diameter of socket
19 - 5.2.3 Length of socket
19 - 5.2.4 Wall thickness
20 - 5.2.5 Branches of different nominal size
20 - 5.2.6 Waterway diameter
21 - 5.3 PERFORMANCE REQUIREMENTS
22 - SECTION 6 COMPRESSION FITTINGS
22 - 6.1 SCOPE OF SECTION
22 - 6.2 DESIGN
22 - 6.2.1 Copper alloy compression fittings manufactured to dimensions
22 - 6.2.2 Compression fittings complying with performance requirements
22 - 6.3 PERFORMANCE REQUIREMENTS
22 - 6.3.1 Compression fittings complying with Clause 6.2.1
22 - 6.3.2 Compression fittings complying with Clause 6.2.2
25 - SECTION 7 THREADED-END CONNECTORS
25 - 7.1 SCOPE OF SECTION
25 - 7.2 DIMENSIONS
25 - 7.3 DESIGN
25 - 7.3.1 Thread stop
25 - 7.3.2 Wrenching flats
25 - 7.3.3 Thickness of threaded-end connectors
25 - 7.3.4 Thread sealing
25 - 7.4 PERFORMANCE REQUIREMENTS
28 - SECTION 8 UNION END CONNECTORS AND COUPLINGS
28 - 8.1 SCOPE OF SECTION
28 - 8.2 DESIGN
28 - 8.2.1 Minimum wall thickness
28 - 8.2.2 Screw threads
28 - 8.2.3 Provision for tightening
28 - 8.2.4 Performance requirements
29 - SECTION 9 ROLL-GROOVED JOINTING END CONNECTORS AND COUPLING BODY
29 - 9.1 SCOPE OF SECTION
29 - 9.2 MATERIALS
29 - 9.2.1 Coupling
29 - 9.3 DESIGN
29 - 9.3.1 Fittings
30 - 9.3.2 Coupling
31 - 9.4 PERFORMANCE REQUIREMENTS AND TEST METHODS
31 - 9.5 INSTALLATION INSTRUCTIONS
32 - SECTION 10 MECHANICAL JOINTING END CONNECTORS
32 - 10.1 SCOPE OF SECTION
32 - 10.2 DESIGN
32 - 10.2.1 General
32 - 10.2.2 Joint assembly-Mechanical-friction locked-end connectors
32 - 10.2.3 Joint assembly-Press-fit end connectors
32 - 10.3 PERFORMANCE
32 - 10.4 INSTALLATION INSTRUCTIONS
33 - SECTION 11 OTHER COPPER ALLOY FITTINGS
33 - 11.1 SCOPE OF SECTION
33 - 11.2 THREADED SOCKETS
33 - 11.3 REDUCING BUSHES WITH OVERLAPPING INTERNAL AND EXTERNAL THREADS
34 - 11.4 CONTINUOUSLY THREADED FITTINGS
34 - 11.5 PERFORMANCE REQUIREMENTS
35 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
35 - A1 SCOPE
35 - A2 RELEVANCE
35 - A3 PRODUCT CERTIFICATION
35 - A4 DEFINITIONS
35 - A4.1 Batch release test
35 - A4.2 Production batch
35 - A4.3 Sample
35 - A4.4 Sampling plan
35 - A4.5 Type test batch
35 - A4.6 Type testing (TT)
36 - A5 TESTING
36 - A5.1 Type testing
36 - A5.2 Batch release testing
36 - A5.3 Retesting
36 - A6 TYPE TESTS
38 - A7 BATCH TESTS
39 - APPENDIX B - LIST OF REFERENCED DOCUMENTS
41 - APPENDIX C - SIZES AND TYPES OF FITTINGS
41 - C1 GENERAL
41 - C2 END CONNECTIONS
41 - C2.1 Screw-threaded sealing connections
41 - C2.2 Screw-threaded fastening connections
41 - C2.3 Capillary fittings
41 - C2.4 Compression fittings
42 - C3 EXAMPLES
44 - APPENDIX D - WATERTIGHTNESS PRESSURE TEST
44 - D1 SCOPE
44 - D2 PRINCIPLE
44 - D3 APPARATUS
45 - D4 TEST CONDITIONS
45 - D5 PROCEDURE
45 - D5.1 Hydrostatic test (all fittings)
45 - D5.2 Pneumatic test (in conjunction with hydrostatic test for cast fittings only)
45 - D6 TEST REPORT
46 - APPENDIX E - STRENGTH OF FABRICATED JOINT-TORQUE TEST
46 - E1 SCOPE
46 - E2 PRINCIPLE
46 - E3 APPARATUS
46 - E4 PROCEDURE
46 - E5 TEST REPORT
48 - APPENDIX F - STRENGTH OF JOINT ASSEMBLY-PRESSURE CYCLING TEST
48 - F1 SCOPE
48 - F2 PRINCIPLE
48 - F3 APPARATUS
48 - F4 PROCEDURE
49 - F5 TEST REPORT
50 - APPENDIX G - RESISTANCE TO PULL-OUT OF ASSEMBLED JOINTS
50 - G1 SCOPE
50 - G2 PRINCIPLE
50 - G3 APPARATUS
50 - G4 TEST ENVIRONMENT
50 - G4.1 Metal joints
50 - G4.2 Composite joints
51 - G5 PROCEDURE
52 - G6 TEST REPORT
53 - APPENDIX H - STRENGTH OF NUT AND ASSEMBLY-TORQUE TEST
53 - H1 SCOPE
53 - H2 PRINCIPLE
53 - H3 APPARATUS
53 - H4 PROCEDURE
54 - H5 TEST REPORT
55 - APPENDIX I - THERMAL CYCLING TEST
55 - I1 SCOPE
55 - I2 PRINCIPLE
55 - I3 APPARATUS
55 - I4 ASSEMBLY
55 - I5 PROCEDURE
56 - I6 TEST REPORT
57 - APPENDIX J - METHOD FOR DETERMINING WATERTIGHTNESS UNDER INTERNAL HYDROSTATIC PRESSURE WHILST SUBJECTED TO BENDING
57 - J1 SCOPE
57 - J2 APPARATUS
57 - J3 PREPARATION OF JOINT ASSEMBLIES
58 - J4 PROCEDURE
58 - J5 TEST REPORT
59 - APPENDIX K - METHOD FOR DETERMINING COMPATIBILITY OF FITTINGS WITH PIPE
59 - K1 SCOPE
59 - K2 PRINCIPLE
59 - K3 APPARATUS
60 - K4 PREPARATION OF TEST SPECIMENS
60 - K5 CONDITIONING OF TEST SPECIMENS
60 - K6 PROCEDURE
61 - K7 TEST REPORT
62 - APPENDIX L - ROLL-GROOVED ASSEMBLY JOINT PRESSURE RESISTANCE TEST
62 - L1 SCOPE
62 - L2 PRINCIPLE
62 - L3 APPARATUS
62 - L4 TEST CONDITIONS
63 - L5 PROCEDURE
63 - L6 TEST REPORT
64 - APPENDIX M - SIMULATED SAMPLES
64 - M1 SCOPE
64 - M2 GENERAL
64 - M3 TYPICAL EXAMPLES OF SIMULATED SAMPLES
64 - M4 SPECIAL ISSUES
65 - M5 COMPONENT DOCUMENTATION
65 - M6 ACCEPTANCE

Specifies requirements for metallic body pipe fittings and connectors for use with copper tubes and stainless steel pipes and tubes and adaptor fittings for connection to other pipe materials in water supply and gas systems where the normal working temperature does not exceed 95 degrees Celsius, and where the maximum operating pressure does not exceed 1.4MPa.

This Standard specifies requirements for metallic body pipe fittings and connectors for use with copper tubes and stainless steel pipes and tubes and adaptor fittings for connection to other pipe materials in water supply and gas systems where the normal working temperature does not exceed 95°C, and where the maximum operating pressure does not exceed 1.4 MPa.Products designed for a temperature in excess of 95°C are included where tested to the appropriate temperature criteria.NOTES:1 For fittings used for gas applications, see AS5601.2 Illustrations used in this Standard are diagrammatic only and have been chosen without prejudice.

Originated as AS 3688-1994.
Third Edition AS 3688-2005.
Reissued incorporating Amendment No. 1 (October 2006).