AS/NZS 4998:2009
Bolted unrestrained mechanical couplings for waterworks purposes
Specifies requirements for unrestrained mechanical couplings for joining above or below ground water mains and wastewater mains, other than polyethylene (PE) piping, with pressure classifications of PN 16 and PN 35 and nominal sizes DN 80 to DN 750 and for a maximum working temperature of 40ºC.
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AS/NZS 4998:2009 BOLTED UNRESTRAINED MECHANICAL COUPLINGS FOR WATERWORKS PURPOSES
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 REFERENCED DOCUMENTS
1.3 DEFINITIONS
1.3.1 Allowable operating pressure (AOP)
1.3.2 Allowable site test pressure (ASTP)
1.3.3 Coating
1.3.4 Coating defect
1.3.5 Maximum allowable operating pressure (MAOP)
1.3.6 Mechanical coupling-Unrestrained
1.3.7 Mechanical coupling-Unrestrained flanged adaptor
1.3.8 Nominal pipe setting gap
1.3.9 Nominal size (DN)
1.3.10 Pressure classification (PN)
1.3.11 Reach
1.4 DESIGNATION OF SIZE
1.5 CLASSIFICATION
1.6 ALLOWABLE PRESSURES
SECTION 2 MATERIALS
2.1 MATERIAL REQUIREMENTS
2.2 DEZINCIFICATION-RESISTANT COPPER ALLOYS
2.3 POLYMERIC SYSTEMS
2.3.1 General
2.3.2 Polymeric coatings
2.4 ELASTOMERIC SEALS
2.5 EFFECT ON WATER
SECTION 3 DESIGN, MANUFACTURE AND OPERATIONAL LIMITATIONS
3.1 DESIGN
3.2 DIMENSIONS
3.3 FREEDOM FROM DEFECTS
3.4 NOMINAL JOINT DEFLECTION
3.5 NOMINAL PIPE SETTING GAP
3.6 COMPONENT JOINTING
3.6.1 Leaktightness
3.6.2 Fasteners
3.7 WELDING
3.7.1 Carbon steel
3.7.2 Stainless steel
SECTION 4 TESTING
4.1 TYPE TESTS
4.1.1 General
4.1.2 Hydrostatic leaktightness test
4.1.3 Joint infiltration test
4.1.4 Assembly test
4.2 POLYMERIC COATING TESTS
SECTION 5 MARKING AND PACKAGING
5.1 MARKING
5.2 PACKAGING
5.3 INSTALLATION INSTRUCTIONS
APPENDIX A - COMPLIANCE REQUIREMENTS
A1 SCOPE
A2 PRODUCT CERTIFICATION
A3 MINIMUM SAMPLING AND TESTING FREQUENCY PLAN
A3.1 General
A3.2 Retesting
A3.3 Rejection after retest
A4 DEFINITIONS
A4.1 Coupling batch
A4.2 Material batch
A4.3 Lot
A4.4 Sample
A4.5 Sampling plan
A4.6 Batch release test (BRT)
A4.7 Type test (TT)
APPENDIX B - TYPICAL COUPLING CONFIGURATIONS
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References
Cup head bolts with ISO metric coarse pitch threads
Testing of products for use in contact with drinking water
Thermal-bonded polymeric coatings on valves and fittings for water industry purposes
Mechanical properties of fasteners - Nuts with specified proof load values - Coarse thread
Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
Related Information
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AS/NZS 4793:2009
Mechanical tapping bands for waterworks purposes
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BS EN 14801:2006
Conditions for pressure classification of products for water and wastewater pipelines
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BS EN 14802:2005
Plastics piping systems. Thermoplastics shafts or risers for inspection chambers and manholes. Determination of resistance against surface and traffic loading
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BS EN 14830:2006
Thermoplastics inspection chamber and manhole bases. Test methods for buckling resistance
AS/NZS 4998:2009 BOLTED UNRESTRAINED MECHANICAL COUPLINGS FOR WATERWORKS PURPOSES
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 REFERENCED DOCUMENTS
1.3 DEFINITIONS
1.3.1 Allowable operating pressure (AOP)
1.3.2 Allowable site test pressure (ASTP)
1.3.3 Coating
1.3.4 Coating defect
1.3.5 Maximum allowable operating pressure (MAOP)
1.3.6 Mechanical coupling-Unrestrained
1.3.7 Mechanical coupling-Unrestrained flanged adaptor
1.3.8 Nominal pipe setting gap
1.3.9 Nominal size (DN)
1.3.10 Pressure classification (PN)
1.3.11 Reach
1.4 DESIGNATION OF SIZE
1.5 CLASSIFICATION
1.6 ALLOWABLE PRESSURES
SECTION 2 MATERIALS
2.1 MATERIAL REQUIREMENTS
2.2 DEZINCIFICATION-RESISTANT COPPER ALLOYS
2.3 POLYMERIC SYSTEMS
2.3.1 General
2.3.2 Polymeric coatings
2.4 ELASTOMERIC SEALS
2.5 EFFECT ON WATER
SECTION 3 DESIGN, MANUFACTURE AND OPERATIONAL LIMITATIONS
3.1 DESIGN
3.2 DIMENSIONS
3.3 FREEDOM FROM DEFECTS
3.4 NOMINAL JOINT DEFLECTION
3.5 NOMINAL PIPE SETTING GAP
3.6 COMPONENT JOINTING
3.6.1 Leaktightness
3.6.2 Fasteners
3.7 WELDING
3.7.1 Carbon steel
3.7.2 Stainless steel
SECTION 4 TESTING
4.1 TYPE TESTS
4.1.1 General
4.1.2 Hydrostatic leaktightness test
4.1.3 Joint infiltration test
4.1.4 Assembly test
4.2 POLYMERIC COATING TESTS
SECTION 5 MARKING AND PACKAGING
5.1 MARKING
5.2 PACKAGING
5.3 INSTALLATION INSTRUCTIONS
APPENDIX A - COMPLIANCE REQUIREMENTS
A1 SCOPE
A2 PRODUCT CERTIFICATION
A3 MINIMUM SAMPLING AND TESTING FREQUENCY PLAN
A3.1 General
A3.2 Retesting
A3.3 Rejection after retest
A4 DEFINITIONS
A4.1 Coupling batch
A4.2 Material batch
A4.3 Lot
A4.4 Sample
A4.5 Sampling plan
A4.6 Batch release test (BRT)
A4.7 Type test (TT)
APPENDIX B - TYPICAL COUPLING CONFIGURATIONS
AS/NZS 4998:2009
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.