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
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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
AS/NZS 4998:2009
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.