WATER SERVICES ASSOCIATION OF AUSTRALIA WATER SUPPLY CODE OF AUSTRALIA

Transcription

1 WATER SERVICES ASSOCIATION OF AUSTRALIA WATER SUPPLY CODE OF AUSTRALIA WSA

2 Water Supply Code of Australia WSA Third Edition Version 3.1 Previous edition WSA 03:

3 CONTENTS PREFACE 6 INTRODUCTION 9 PART 0: GLOSSARY OF TERMS AND ABBREVIATIONS I Glossary of Terms 12 II Abbreviations 26 III Referenced Documents 30 PART 1: PLANNING AND DESIGN Contents 36 1 General 48 2 System Planning 55 3 Hydraulic Design 75 4 Products and Materials 83 5 General Design 97 6 System Pressure Management Structural Design Appurtenances Design Review and Drawings 228 PART 2: CONSTRUCTION Contents General General Construction Products and Materials Excavation Bedding for Pipes Pipe Laying, Jointing and Connecting Pipe Embedment and Support Fill Swabbing Acceptance Testing Disinfection Tolerances on As-Constructed Work Connections to Existing Water Mains Restoration Work As Constructed Details 295

4 WATER SUPPLY CODE OF AUSTRALIA VERSION 3.1 APPENDICES Appendix A Appendix B Generic Infrastructure Protection Guidance Equivalent Pipe Sizes for Commonly Used Materials Appendix C Under Pressure Cut-In Connection to Pressure Pipes DN 80 Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K Booster Configurations Selection of Pressure Accumulator Tanks Water Mains in Slip and Potentially Unstable Areas Soil Classification Guidelines and Allowable Bearing Pressures for Anchors and Thrust Blocks Hydrant Spacings Disinfection of Water Mains Safety Assurance Plan and Job Safety Analysis Connectivity Inspection of Dual Water Supply Systems

5 Water Supply Code of Australia Part 1: Planning and Design Third Edition Version 3.1

6 WSA CONTENTS 1 GENERAL 1.1 SCOPE 1.2 PLANNING AND DESIGN Objectives Scope and requirements Concept plan format Critical infrastructure protection Asset categorisation All hazards Infrastructure protection Detailed design Designer s needs and responsibilities Requirements to be addressed Design outputs Design life Instrumentation and control systems 1.3 CONSULTATION WITH OTHER PARTIES 2 SYSTEM PLANNING 2.1 GENERAL 2.2 SYSTEM PLANNING PROCESS General Extending / upgrading an existing water supply system Providing a new water supply Non-drinking water as drinking water substitution 2.3 DEMANDS General Dual water supply systems General Rainwater tanks Demand assessment General Residential Non-residential Peak demands General Peak day demand Peak hour demand 2.4 SYSTEM CONFIGURATION 2.5 SYSTEM HYDRAULICS General Network analysis Operating pressures Service pressure Maximum allowable service pressure Minimum service pressure Average service pressure Pressure variation analysis Determining supply zones General Use of minimum allowable or desirable minimum service pressures Use of desirable minimum static pressure

7 37 WSA WATER QUALITY General Prevention of back siphonage Water age Disinfection 2.7 SEPARATION OF DRINKING AND NON-DRINKING WATER SUPPLY SYSTEMS Permanent cross links and cross connections Temporary cross links 2.8 PUMPING STATIONS General Design factors System related factors Site related factors Service related factors Concept design 2.9 SERVICE RESERVOIRS Storage capacity Location 2.10 TRENCHLESS TECHNIQUES FOR PIPELAYING 2.11 FUTURE SYSTEM EXPANSION 2.12 SYSTEM REVIEW 3 HYDRAULIC DESIGN 3.1 SIZING General Minimum pipe sizes Empirical sizing of reticulation mains Dual water supply systems Fire flows Sizing by analysis General Head losses Hydraulic roughness values Flow velocities 3.2 DESIGN PRESSURES General Gravity systems Systems subjected to dynamic pressures 3.3 PRESSURE CLASS OF SYSTEM COMPONENTS Gravity systems Systems subjected to dynamic pressures 3.4 THRUST AND ANCHOR BLOCK DESIGN 3.5 SYSTEM TEST PRESSURE 3.6 DESIGN FOR DYNAMIC STRESSES General Surge Fatigue Fatigue de-rating of plastics pipes and fittings 3.7 TEMPERATURE DE-RATING OF PLASTICS PIPES AND FITTINGS 3.8 PIPELINE COMPONENTS MINIMUM PRESSURE CLASS

8 WSA PRODUCTS AND MATERIALS 4.1 GENERAL 4.2 DIFFERENTIATION OF DRINKING AND NON-DRINKING PIPE SYSTEMS Principles Water supply mains drinking water Water supply mains non-drinking water Property services drinking water Property services non-drinking water Marking tapes 4.3 DUCTILE IRON PIPELINE SYSTEMS Product Specifications Sizes and configurations Seal coating of lining Sleeving Screw-on flanges for DI pipes Flanged joints 4.4 PVC PIPELINE SYSTEMS 4.5 PE PIPELINE SYSTEMS 4.6 STEEL PIPELINE SYSTEMS Product Specifications Sizes and configurations Joints Field welding Flanged joints 4.7 GRP PIPELINE SYSTEMS 4.8 PROTECTION AGAINST DEGRADATION Application Protection against aggressive environments Protection against damage to coatings Stainless steels Grade selection Welding Threaded components Cathodic protection Stray current corrosion Protection against contaminated ground Bolted connections 5 GENERAL DESIGN 5.1 GENERAL REQUIREMENTS Design tolerances Levels Water main renewals electrical safety and earthing to water services Environmental considerations General Urban salinity 5.2 RETICULATION DESIGN FOR WATER QUALITY Layout of water mains Looped mains Link mains Reduced size mains 5.3 WATER MAIN ACCESS 5.4 LOCATION OF WATER MAINS

9 39 WSA General Water mains in road reserves General Location in footway Location in carriageway Location in roundabouts and bus bays Location in other than dedicated public road reserves Water mains in easements Dual water supply systems Effect on vegetation Water mains near trees Contaminated sites Crossings General Requirements for encased pipe installations Railway reserves Crossings of creeks or drainage reserves Overhead power lines and transmission towers Water mains in conjunction with landscaping and/or other development Water mains on curved alignments Location markers Marking tape General Mains Property services 5.5 TRENCHLESS TECHNOLOGY 5.6 SHARED TRENCHING 5.7 DUPLICATE MAINS 5.8 RIDER MAINS 5.9 CONNECTION OF NEW MAINS TO EXISTING MAINS 5.10 TERMINATION POINTS Permanent ends of water mains Temporary ends of water mains Chlorination assemblies Flushing points 5.11 PROPERTY SERVICES General Connections to water mains Services, outlets and meters 5.12 OBSTRUCTIONS AND CLEARANCES General Surface obstructions Clearance from transmission towers Clearance from structures and property boundaries Underground obstructions and services General Clearance requirements Deviation of water mains General Horizontal deviation of water mains Vertical deviation of water mains Curving of pipes to avoid obstructions 5.13 DISUSED OR REDUNDANT PIPELINES

10 WSA SYSTEM PRESSURE MANAGEMENT 6.1 GENERAL 6.2 IN-LINE PRESSURE BOOSTER PUMPING STATIONS Planning criteria Concept design General Life cycle considerations Functionality Due diligence requirements Reliability Maintainability Materials design Location Site selection Noise control Services Access Site drainage Landscaping Security Signage Supporting systems Health and safety Commissioning plan General Pre-commissioning Commissioning System planning and modelling Modelling Minimum pressure affecting the area Number of affected properties within the low pressure zone Booster design General Connection to the network Maximum flow and pressure requirements Design for minimum pressure boost conditions Design for minimum flow conditions Booster configuration design Booster set and pump selection Booster pipework and manifold design Booster equipment and devices Site specific requirements Booster pipework General design parameters Manifolds, off-takes, suction and delivery pipework Pressure gauges and tappings Pressure accumulator tank Power system and supply General Security of supply Primary supply Duplicate supply Emergency power On-site generator Mobile generator Power factor correction Lighting

11 41 WSA Control and telemetry system General Instrumentation System requirements Fire flow operation Alarms and controls General Control switches manual and emergency operation Telemetry General Software Communications 6.3 PRESSURE REDUCING VALVE INSTALLATIONS Planning criteria Design requirements 6.4 PRESSURE SUSTAINING VALVE INSTALLATIONS Planning criteria Design requirements 7 STRUCTURAL DESIGN 7.1 GENERAL 7.2 STRUCTURAL CONSIDERATIONS 7.3 INTERNAL FORCES 7.4 EXTERNAL FORCES General Pipe cover Embedment zone dimensions Pipe embedment Buoyancy 7.5 GEOTECHNICAL CONSIDERATIONS General Water mains in engineered or controlled fill Water mains in non-engineered fill Construction of an embankment 7.6 CONCRETE ENCASEMENT General Requirements Encased steel pipelines General Existing steel pipelines 7.7 WATER MAINS IN UNSTABLE GROUND General Mine subsidence areas Slip areas 7.8 ABOVE-GROUND WATER MAINS 7.9 PIPELINE ANCHORAGE General Thrust blocks General Concrete thrust blocks Use of puddle flanges to transfer thrust Timber and recycled plastics thrust blocks Anchor blocks

12 WSA Thrust and anchor blocks for dual water supply systems Restrained elastomeric seal joint water mains Restraint requirements for special situations Above-ground mains with unrestrained flexible joints Buried steel mains with welded joints Above-ground steel mains with welded joints Ductile iron and steel mains with flanged joints PE mains 7.10 BULKHEADS AND TRENCHSTOPS 7.11 UNFORESEEN GROUND CONDITIONS 8 APPURTENANCES 8.1 VALVES GENERAL Valving design Valve siting principles Selection considerations Local in-line booster pumping stations Plastics identification covers 8.2 STOP VALVES Product Specifications Installation design and selection criteria General Gate valves Butterfly valves Stop valves for transfer/distribution mains Stop valves for reticulation mains Stop valves for local in-line booster pumping stations Bypass of stop valve Stop valves location and arrangements General Arrangement Arrangement Arrangement Arrangement Arrangement Arrangement Arrangement Stop valve special arrangements Rider mains and network configurations Crossing mains interconnection 8.3 CONTROL VALVES Product Specifications Automatic inlet control valves (AICV) Pressure reducing valves (PRV) Pressure relief valves (PRelV) Pump control valves Pressure sustaining valves (PSV) 8.4 AIR VALVES (AV) Product Specifications Installation design criteria Air valves type Air valves size Air valves location Use of hydrants as an alternative to air valves Water sampling via air valves

13 43 WSA NON-RETURN VALVES Product Specifications Installation design criteria Non-return valves for local in-line booster pumping stations and boosted zones 8.6 SCOURS AND PUMP-OUT BRANCHES Location and arrangements Design Scour application Scour size Scour location 8.7 SWABBING POINTS 8.8 HYDRANTS ERROR! BOOKMARK NOT DEFINED Product Specifications Purposes Hydrant siting principles Hydrant types Hydrant installation Hydrant outlet connections Hydrant size Hydrant spacing Hydrant location Hydrants for reticulation system operational requirements Hydrants at ends of mains 8.9 DISINFECTION FACILITIES General Reticulation mains Transfer and distribution mains Discharge 8.10 SURFACE FITTINGS Product Specifications General Marking of surface fittings Installation requirements 8.11 APPURTENANCE LOCATION MARKING General Marker posts and plates Pavement markers Kerb markings 9 DESIGN REVIEW AND DRAWINGS 9.1 DESIGN REVIEW 9.2 DESIGN DRAWINGS General Composition of Design Drawings Scale Contents of Design Drawings Pipeline system acronyms Water mains >DN SPECIFICATIONS 9.4 RECORDING OF WORK AS CONSTRUCTED INFORMATION

14 WSA TABLES Table 1.1 Table 1.2 Table 2.1 Table 2.2 Table 2.3 Table 3.1 Table 3.2 Table 3.3 Table 3.4 Table 4.1 Table 5.1 Table 5.2 Table 5.3 Table 5.4 Table 5.5 Table 6.1 Table 7.1 Table 7.2 Table 7.3 Table 7.4 Table 7.5 Table 8.1 Table 8.2 Table 8.3 Table 8.4 FIGURES Figure 1.1 Figure 2.1(a) Figure 2.1(b) Figure 2.1(c) Figure 2.2 Figure 4.1 Asset Categories Typical Asset Design Lives Guide to Demand Allocation Within Dual Water Systems Typical Peak Hour Demand Work Sheet for Dual Water Supply Systems Service Pressure Limits for Drinking Water Single Supply Minimum Pipe Sizes for Particular Developments Empirical Guide for Pipe Sizing Methods for Design of Plastics Pipes and Fittings for Dynamic Stresses Temperature De-Rating Factors for Plastics Pipes Operating at Elevated Temperatures Colour Differentiation of Drinking Water and Non-Drinking Water Components in Dual Water Reticulation Systems Design Requirements for Reduced Sized Drinking Water Mains in Court Bowls, Cul-de-Sacs and Dead-Ends Default Easement Guidelines Trench Details for Two Parallel Mains/Services Residential Property Service Pipe/Connection Sizes Clearances Between Water Mains and Underground Services Flow Velocities PVC Pipe Material Characteristics Minimum Depths of Pipe Cover Minimum Thrust Area for Concrete Blocks at 1000 kpa System Test Pressure Allowable Applications for Timber and Recycled Plastics Thrust Blocks Requirements for Bulkheads and Trenchstops Colour Coding of Spindle Cap Plastics Covers Stop Valve Spacing Criteria Maximum Water Main Drainage Times Minimum Scour Size Typical Water Supply System Single Transfer/Distribution Main, Minor Network and Dead-End Branch Mains Single Transfer/Distribution Main, Network With Multiple Distribution Mains and Branch Mains With Reduced Diameter Dead-Ends Twin Transfer/Distribution Mains, Network With Multiple Distribution Mains, Looped Mains and Link Mains to Minimise Dead-Ends, Some Reduced Diameter Dead-End Mains and Staging of Provision of Mains Typical Water Supply Pumping Station Arrangements Flange Fastener Tightening Sequence

15 45 WSA Figure 4.2 Figure 4.3 Typical Insulated Flanged Joint for Cathodically Protected Steel Mains Typical Bolted Connection Detail for Fusion Bonded Coated Ductile Iron Flanges With Stainless Steel Fasteners Figure 4.4 Typical Bolted Connection Detail and Corrosion Protection Procedure for Buried Ductile Iron Flanges With Galvanised Steel Fasteners Figure 4.5 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 5.6 Figure 5.7 Figure 5.8 Figure 5.9 Figure 5.10 Figure 5.11 Figure 5.12 Figure 5.13 Figure 5.14 Figure 5.15 Figure 5.16 Figure 5.17 Figure 5.18 Figure 5.19 Figure 6.1 Figure 6.2 Figure 7.1 Figure 7.2 Figure 7.3 Figure 7.4 Figure 7.5 Figure 7.6 Typical Bolted Connection Detail for PE Stub Flange and Raised Ductile Iron Flange With Stainless Steel Fasteners and Backing Plate Looped and Link Mains Design Requirements for Reduced Sized Mains in Court Bowls, Culde-Sacs and Dead-Ends Typical Dual Water Installation in Common Trench Typical Shared/Combined Trench Installation Typical Shared/Combined Trench Installation Off-take Typical Under Pressure Cut-In Connection Method Using a Split SS Clamp With Flanged Off-take Plan View Typical Inserted Tee Method Using Mechanical Couplings Plan View Typical Flushing Assembly Details for Ends of Reduced Sized Mains Typical Split Service Main to Meter Across Road Carriageway Typical Property Service Layouts in Dual Water Supply Networks Typical Duct and Service Marker Details Horizontal Deviation by Deflection at Pipe Joints Plan View Horizontal Deflection Using a DI SOC-SOC Connector and Permitted Joint Deflections for DI Pipes and Other Applicable Pipe Types Plan View Deflection Using DI Bends with DI and Other Permitted Pipe Types Plan View Vertical Deviation by Deflection at Pipe Joints Section View Vertical Deviation Using DI Bends Section View Typical Anchor Block Detail for Vertical Bends Vertical Deflections Using Fabricated Pipe and Flanges Section View Vertical Deflections Using Double Offset Fabricated Pipe and Flanges Section View Typical Pre-Commissioning and Commissioning Process Typical Handover to Water Agency Typical Arrangement of Buried Pipe Type A Embedment Support Type B Embedment Support Type C and D Embedment Support Type E Embedment Support Type F Embedment Support

16 WSA Figure 7.7 Figure 7.8 Figure 7.9 Figure 7.10 Figure 7.11 Figure 7.12 Figure 7.13 Figure 7.14 Figure 7.15 Figure 7.16 Figure 7.17 Figure 7.18 Figure 7.19 Figure 7.20 Figure 7.21 Figure 7.22 Figure 7.23 Figure 7.24 Figure 7.25 Figure 7.26 Figure 8.1 Figure 8.2 Figure 8.3 Type G Embedment Support Type H Embedment Support Type J and K Concrete Encasement Embedment Support Alternative End Treatment for Concrete Encased Steel Pipelines Thrust Block for Tees (for Horizontal Thrust) Thrust Block for Bends (for Horizontal Thrust) Taper Thrust Block (for Horizontal Thrust) Flushing/Washout Bend Thrust Block (for Horizontal Thrust) (Minimum Required Thrust Area as Per Dead-End) Typical Concrete Thrust Block for Flanged Valves Typical Concrete Thrust Block for Socketed Valves Typical Timber and Recycled Plastics Thrust Block Configurations Typical Valve Restraint Mechanism Typical Concrete Thrust Blocks for Adjacent Dual Water Mains Typical Concrete Bulkhead Detail Typical Road Crossing Bulkhead Typical Trench Stop Detail Typical Trench Drainage Detail at Bulkhead Typical Trench Drainage Detail at Low Point in Trench Typical Trench Drainage Detail at Concrete Encased Sections Typical Trench Drainage Discharge Plastics Identification Cover Typical Gate Valve and Hydrant Installation at Standard Depth Typical Gate Valve Installation at Deeper Than Standard Depth Figure 8.4 Typical Valve Chamber Arrangement for DN 500 and DN 600 Mains Plan View Figure 8.5 Figure 8.6 Figure 8.7 Figure 8.8 Figure 8.9 Figure 8.10 Figure 8.11 Figure 8.12 Figure 8.13 Figure 8.14 Figure 8.15 Figure 8.16 Figure 8.17 Figure 8.18 Figure 8.19 Typical Valve Chamber Arrangement for a DN 750 Main Plan View Typical Valve Chamber Arrangement Cross Section Bypass Arrangement With L-Type Ball Hydrant Branch Valve Adjacent to Main Branch Valve Adjacent to Inner Splay Corner Valve and Hydrant Combinations Valve Adjacent to a Taper Valves in Main Cross-Links Valves in Conjunction With Control Valves Two Direction Supply Off-take Arrangement for Rider Mains Interconnection of DN 200 and DN 225 Crossing Mains Interconnection of Reticulation and Distribution Mains Interconnection of Distribution Mains Interconnection of a Continuing Reticulation Main and Larger Main

17 47 WSA Figure 8.20 Figure 8.21 Figure 8.22 Figure 8.23 Figure 8.24 Figure 8.25 Figure 8.26 Figure 8.27 Figure 8.28 Figure 8.29 Figure 8.30 Figure 8.31 Figure 8.32 Figure 8.33 Figure 8.34 Figure 8.35 Figure 8.36 Figure 8.37 Figure 8.38 Figure 8.39 Typical Pressure Reducing Valve Installation Sectional Elevation Alternative Above-Ground Installation PRV on Bypass Side Elevation PRV on Main Line With Bypass Plan View Typical Air Valve Orientation Typical Air Valve Installation Scour Detail Scour Discharge to Approved Drainage System Scour Discharge Collection/Pump-Out Sump Scour Discharge to Storage Lagoon Spring Hydrant Typical Direct Connection Isolating Valve Assembly With Spring Hydrant Typical Hydrant Installation in Non-Trafficable Location Typical Hydrant Installation in Trafficable Asphaltic Concrete Pavement Typical Hydrant With Isolating Valve Installation With Spring Hydrant Option in Non-Trafficable Location Typical Offsetting of Hydrants in Footway Non-Trafficable Stop Valve Surface Box Typical Trafficable Stop Valve Surface Boxes Typical Trafficable Hydrant Surface Boxes Retro-Reflective Pavement Markers Kerb Markings

18 Water Supply Code of Australia Part 2: Construction Third Edition Version 3.1

19 WSA GENERAL 10.1 SCOPE 10.2 INTERPRETATION CONTENTS 11 GENERAL CONSTRUCTION 11.1 GENERAL 11.2 ORDER OF CONSTRUCTION, TESTING AND COMMISSIONING 11.3 CONTRACT INTERFACES 11.4 CUSTOMER FOCUS General Resolution of complaints 11.5 PROTECTION OF PROPERTY AND ENVIRONMENT Protection of other services Disused / Redundant water mains Road reserves or other thoroughfares Road opening permits Treatment of pavements and other surfaces Cleanliness of roads, paths, accesses and drainage paths Storage of products, materials and equipment Obstruction of street drainage Private and public properties Protection of the environment and heritage areas General Collection and disposal of wastes Protection of adjacent lands and vegetation Control of water pollution Contaminated soils Fire ant areas Control of noise and atmospheric pollution Equipment and machinery use in bush fire prone areas 11.6 OPERATION OF WATER SUPPLY NETWORK 11.7 ALTERATION OF EXISTING SERVICES 11.8 CONNECTION TO AND WORK ON EXISTING ASBESTOS WATER MAINS 11.9 CUT-IN CONNECTION EQUIPMENT SURVEY MARKS CONSTRUCTION TOLERANCES LATENT CONDITIONS 12 PRODUCTS AND MATERIALS 12.1 AUTHORISED PRODUCTS AND MATERIALS General 12.2 DELIVERY INSPECTION OF PRODUCTS AND MATERIALS 12.3 TRANSPORTATION, HANDLING AND STORAGE OF PRODUCTS AND MATERIALS General Transportation Unloading and handling On-site storage 12.4 REJECTED PRODUCTS AND MATERIALS 12.5 CONCRETE WORKS 12.6 SUPPLY OF WATER TO THE WORKS 12.7 SUPPLY OF WATER TO EXISTING PROPERTIES 12.8 UNDER PRESSURE CUT-IN CONNECTION TO PRESSURE PIPES DN Flanged off-takes Valves Flange holes Gaskets

20 235 WSA Bolting system General Carbon or alloy steel bolt assemblies Stainless steel bolt assemblies Insulation sleeves Plastics inserts for metallic pipes 13 EXCAVATION 13.1 PRECAUTIONS 13.2 LIMITS OF CLEARING AND EXCAVATION 13.3 PROTECTION OF TREES General precautions Protection of roots 13.4 BLASTING 13.5 SUPPORT OF EXCAVATIONS 13.6 DRAINAGE AND DEWATERING 13.7 UNDER PRESSURE CUT-IN CONNECTION TO PRESSURE PIPES DN Excavation requirements Extent of excavation 13.8 EXCAVATION ACROSS IMPROVED SURFACES 13.9 TRENCH EXCAVATION General Construction of embankment Clearances for on-site works REFILL OF EXCESSIVE EXCAVATION FOUNDATIONS AND FOUNDATION STABILISATION SURPLUS EXCAVATED MATERIAL TUNNELLING 14 BEDDING FOR PIPES 14.1 TRENCH FLOOR PREPARATION 14.2 BEDDING AND PIPE SUPPORT 14.3 SPECIAL PIPE SUPPORT FOR NON-SUPPORTIVE SOILS 15 PIPE LAYING, JOINTING AND CONNECTING 15.1 INSTALLATION OF PIPES General Dual water supply areas Cleaning, inspection and joint preparation Laying Lift and re-lay construction 15.2 HORIZONTAL AND VERTICAL DEFLECTIONS OF PIPES General Deflection at a pipe joint Curving of pipe 15.3 HORIZONTAL AND VERTICAL SEPARATION OF CROSSING PIPELINES 15.4 VALVES, HYDRANTS AND OTHER APPURTENANCES 15.5 UNDER PRESSURE CUT-IN CONNECTION TO PRESSURE PIPES DN Inspection of host pipe Inspection of valve to be installed Disinfection of fittings and equipment Installation of off-take clamp Installation of the valve Cut-in operation Recording and reporting 15.6 FLOTATION CONTROL 15.7 THRUST AND ANCHOR BLOCKS AND RESTRAINED JOINTS 15.8 TAPPING OF MAINS, PROPERTY SERVICES AND WATER METERS 15.9 TRENCH STOPS

21 WSA BULKHEADS CORROSION PROTECTION OF DUCTILE IRON MARKING TAPES Non-detectable marking tape Detectable marking tape Tracer wire VALVES, HYDRANTS AND SURFACE BOXES AND FITTINGS Installation Valve chambers for large diameter mains SCOURS BORED PIPES UNDER ROADS, DRIVEWAYS AND ELSEWHERE AQUEDUCTS BRIDGE CROSSINGS APPURTENANCE LOCATION MARKING FLANGED JOINTS WELDING OF STEEL PIPELINES General Field welding of flanges Reinstatement of cement mortar lining Reinstatement of external corrosion protection at joints using a tape system Surface preparation Priming surfaces Mastic filler Tape application Reinstatement of external corrosion protection at joints using a heat-shrinkable sleeve system Surface preparation Preheat pipe Priming surfaces Mastic filler Heat-shrinkable sleeve preparation Heat-shrinkable sleeve application WELDING OF PE PIPELINES 16 PIPE EMBEDMENT AND SUPPORT 16.1 GENERAL 16.2 EMBEDMENT MATERIALS 16.3 COMPACTION OF EMBEDMENT Methods 16.4 SPECIAL BEDDING AND EMBEDMENTS / GEOTEXTILE SURROUND AND PILLOW 16.5 REMOVAL OF TRENCH SUPPORTS 16.6 CONCRETE EMBEDMENT AND ENCASEMENT 17 FILL 17.1 TRENCH FILL Material requirements Trafficable Areas Non-Trafficable Areas Placement Compaction of trench fill 17.2 EMBANKMENT FILL 17.3 DRIVES AND TUNNEL FILL 18 SWABBING 18.1 GENERAL 18.2 SWABS 18.3 SWABBING PROCEDURE 19 ACCEPTANCE TESTING 19.1 GENERAL

22 237 WSA VISUAL INSPECTION 19.3 COMPACTION TESTING General Compaction testing requirements General Trafficable areas test zone Non-trafficable areas test zone Frequency and location of tests Retesting 19.4 HYDROSTATIC PRESSURE TESTING General Mains Property services Under pressure cut-in connections 19.5 BLOCK TESTING DUAL WATER SUPPLY SYSTEMS FOR CONNECTIVITY 19.6 INSULATED JOINT RESISTANCE TEST 19.7 WATER QUALITY TESTING General Test procedure Satisfactory water quality test Failure of test 20 DISINFECTION 20.1 APPLICATION 20.2 FLUSHING OF DISINFECTION WATER 21 TOLERANCES ON AS-CONSTRUCTED WORK 21.1 GENERAL 21.2 HORIZONTAL TOLERANCES Water mains and in-line structures Property services and meters 21.3 VERTICAL TOLERANCES Water mains, property connections and structures Verticality ( plumb ) 21.4 TOLERANCES ON FINISHED SURFACE STRUCTURES AND FITTINGS 21.5 CAST IN-SITU CONCRETE STRUCTURES AND SLABS 22 CONNECTIONS TO EXISTING WATER MAINS 22.1 GENERAL 22.2 UNDER PRESSURE CONNECTIONS 22.3 INSERTED TEE CONNECTIONS Shutdown of existing water mains Making the connection to existing water main Re-charging the shutdown water main 22.4 CONNECTION AND/OR CHARGING THE NEW WATER MAINS 22.5 RECONNECTION OF PROPERTIES SUPPLIED BY TEMPORARY PRIVATE SERVICES 23 RESTORATION 23.1 GENERAL 23.2 PAVEMENTS 23.3 LAWNS 23.4 GRASSED AREAS 23.5 BUSHLAND 23.6 PROVISION FOR AND RECTIFICATION OF SETTLEMENT 23.7 MAINTENANCE OF RESTORED SURFACES 24 WORK AS CONSTRUCTED DETAILS

23 WSA TABLES Table 18.1 Table 19.1 Dimensions of Swabs and Discharge Units Minimum Compaction of Embedment, Trench Fill and Embankments FIGURES Figure 13.1 Figure 15.1 Figure 15.2 Figure 15.3 Figure 15.4 Typical Excavation Dimensions Ball and Socket Joint Slip-In Welded Joint Plain End Welded Collar Joint Plain End Butt Welded Joint