AS/NZS 2566.2:2002

AS/NZS 2566.2:2002 BURIED FLEXIBLE PIPELINES - INSTALLATION

PREFACE

CONTENTS

SECTION 1 SCOPE AND GENERAL

1.1 SCOPE

1.2 REFERENCED DOCUMENTS

1.3 APPLICATION

1.3.1 Applicable installations

1.3.2 Other installations

1.4 DEFINITIONS

1.4.1 Bedding zone

1.4.2 Bulkheads and trenchstops

1.4.3 Clegg impact tester

1.4.4 Cohesionless soils

1.4.5 Cohesive soils

1.4.6 Composite pipe

1.4.7 Controlled low strength materials (CLSM)

1.4.8 Design pressure

1.4.9 Dynamic cone penetrometer

1.4.10 Embankment fill zone

1.4.11 Embedment zone

1.4.12 Embedment materials

1.4.13 Existing surface

1.4.14 Flowable fill

1.4.15 Finished surface level

1.4.16 Flexible pipe

1.4.17 Foundation

1.4.18 Haunch support zone

1.4.19 Homogeneous pipe

1.4.20 Nominal diameter or nominal size (DN)

1.4.21 Ordinary fill

1.4.22 Overlay zone

1.4.23 Perth sand penetrometer

1.4.24 Plain wall pipe

1.4.25 Profiled wall pipe

1.4.26 Rated (or class) pressure and PN

1.4.27 Relative compaction

1.4.28 Rigid pipe

1.4.29 Selected fill

1.4.30 Side support zone

1.4.31 Soil (deformation) modulus

1.4.32 Springline

1.4.33 Static head

1.4.34 Structured wall pipe

1.4.35 Surge pressure

1.4.36 Test pressure

1.4.37 Trench fill zone

1.4.38 Zone of influence for side support

1.5 NOTATION

1.6 WORK METHOD STATEMENT

1.7 ASSET PROTECTION

SECTION 2 TRANSPORTATION, HANDLING AND STORAGE

2.1 SCOPE

2.2 TRANSPORTATION

2.3 HANDLING

2.3.1 General

2.3.2 Unloading

2.4 ON-SITE STORAGE

SECTION 3 PIPELINE COMPONENTS ACCEPTANCE CRITERIA

3.1 SCOPE

3.2 ACCEPTANCE CRITERIA

3.3 ACCEPTANCE AFTER RECTIFICATION

SECTION 4 EXCAVATION

4.1 SCOPE

4.2 PRIOR TO COMENCEMENT

4.3 EXCAVATION METHOD

4.3.1 General

4.3.2 Suitability of natural trench wall and foundation material

4.3.3 Minimum cover

4.3.4 Road surface cutting

4.3.5 Dewatering

4.3.6 Use of explosives

4.4 EMBEDMENT ZONE GEOMETRY

4.4.1 Trench width at embedment zone level

4.4.2 Trench width above embedment zone

4.4.3 Embedment zone dimensions for embankments

4.4.4 Gradient and depth

4.4.5 Over-excavation of foundation

4.4.6 Variation from specified trench or embedment zone width

4.4.7 Pockets for pipeline projections

4.4.8 Clearances for on-site works

4.4.9 Excavation for structures for pipeline restraint and component support

SECTION 5 INSTALLATION

5.1 SCOPE

5.2 LAYING

5.2.1 Inspection immediately prior to laying

5.2.2 Handling and storage

5.2.3 Positioning the pipeline

5.2.4 Joint deflections in a pipeline

5.2.5 Bending the pipeline

5.2.6 Adjacent parallel pipelines

5.2.7 Horizontal or vertical separation of crossing pipelines

5.2.8 Storage in direct sunlight or hot weather

5.2.9 Provision for expansion and contraction

5.2.10 Temporary internal struts

5.2.11 Pipe laying tolerances

5.2.12 Jointing methods

5.2.13 Removal of pegs and packing

5.3 FOUNDATION

5.4 EMBEDMENT ZONE

5.4.1 Migration of fines

5.4.2 Materials

5.4.3 Trench drainage during construction

5.4.4 Placement and compaction

5.4.5 Interface with the native soil

5.4.6 Trench Support Systems

5.5 FILL ZONE

5.5.1 Material requirements

5.5.2 Protection of pipeline

5.5.3 Prevention of flotation

5.6 COMPACTION

5.6.1 General

5.6.2 Compaction trials

5.6.3 Compaction control

5.6.4 Frequency of field relative compaction testing

5.7 DEFLECTION CRITERIA

5.8 ALTERNATIVE EMBEDMENT MATERIAL FOR PIPE RESTRAINT

5.8.1 General

5.8.2 Bulkheads and trenchstops

5.8.3 Concrete encasement and structures

5.8.4 Anchor and thrust blocks

SECTION 6 FIELD TESTING

6.1 SCOPE

6.2 PURPOSE

6.3 PRESSURE PIPELINES-HYDROSTATIC PRESSURE TESTING

6.3.1 General

6.3.2 Selection of test pressure

6.3.3 Selecting test lengths

6.3.4 Pressure test methods

6.4 NON-PRESSURE PIPELINES-LEAKAGE TESTING

6.4.1 General

6.4.2 Low pressure air test

6.4.3 Vacuum test

6.4.4 Hydrostatic test

6.4.5 Infiltration test

6.5 DEFLECTION TESTING

6.5.1 General

¿6.5.2 Pipelines ¿750 mm diameter

¿6.5.3 Pipelines ¿750 mm diameter

SECTION 7 COMMISSIONING

7.1 GENERAL

7.2 CLEANING WATER SUPPLY PIPELINES

7.3 DISINFECTION OF DRINKING WATER SUPPLY PIPELINES

7.3.1 Cleaning

7.3.2 Disinfection

APPENDIX A - LIST OF REFERENCED DOCUMENTS

APPENDIX B - INSTALLATION AND RELATED MANUFACTURING STANDARDS

APPENDIX C - GUIDE TO THE INSTALLATION PROCESS

C1 SCOPE

C2 INSTALLATION PROCESS

APPENDIX D - WORK METHOD STATEMENT

D1 SCOPE

D2 WORK METHOD STATEMENT (WMS)

D3 OTHER ACTIVITIES

D4 INSPECTION AND TEST PLANS

APPENDIX E - ASSET PROTECTION

E1 SCOPE

E2 REQUIREMENTS FOR PROTECTION OF SERVICES, STRUCTURES, PAVEMENTS AND VEGETATION

APPENDIX F - METHODS OF JOINTING

F1 SCOPE

F2 APPLICATION

F3 ELASTOMERIC SEAL JOINTS

F4 SOLVENT CEMENT JOINTS

F5 FUSION JOINTS

F5.1 Methods

F5.2 Butt fusion

F5.3 Socket fusion

F5.4 Saddle fusion

F5.5 Electrofusion

F5.6 Extrusion welding

F6 MECHANICAL JOINTS

F6.1 General

F6.2 Flanged joints

F6.3 Compression couplings

F7 WELDED STEEL JOINTS

F8 REPAIR JOINTS

APPENDIX G - EMBEDMENT MATERIALS-PARTICLE SIZE AND GRADING LIMITS

G1 SCOPE

G2 TYPICAL EMBEDMENT MATERIAL GRADINGS

APPENDIX H - EMBEDMENT AND FILL MATERIALS-COMPACTION

H1 COMPACTION METHODS

APPENDIX I - PREVENTION OF EMBEDMENT ZONE SOIL PARTICLE MIGRATION

I1 SCOPE

I2 FIELD EXPERIENCE

I3 MIGRATION CONTROL

APPENDIX J - SPECIFICATION FOR GEOTEXTILE FILTER FABRIC

J1 SCOPE

J2 GEOTEXTILE FILTER FABRIC

APPENDIX K - CONTROLLED LOW STRENGTH MATERIALS-CLSM

K1 GENERAL

K2 MIX PROPORTIONS FOR CEMETITIOUS AND GRANULAR MATERIAL

K3 MIX FLOWABILITY

K4 GRADING OF GRANULAR MATERIAL FOR USE IN CLSM

K5 HANDLING AND PLACEMENT

APPENDIX L - STABILIZED SOILS AND AGGREGATES

L1 GENERAL

L2 MIX PROPORTIONS

L3 MIXING AND PLACEMENT

L4 TESTING

APPENDIX M - FIELD HYDROSTATIC TESTING FOR PRESSURE PIPELINES

M1 SCOPE

M2 PRE-TEST PROCEDURES

M3 POST-TEST PROCEDURES

M4 CONSTANT PRESSURE TEST (WATER LOSS METHOD)

M4.1 Application

M4.2 Procedure

M4.3 Report

M5 CONSTANT PRESSURE TEST (WATER LOSS METHOD) FOR VISCO-ELASTIC PRESSURE PIPELINES

M5.1 Application

M5.2 Procedure

M5.3 Report

M6 PRESSURE DECAY TEST FOR VISCO-ELASTIC PIPELINES

M6.1 Application

M6.2 Pressurizing the pipeline

M6.3 Early prediction of problems

M6.4 Three-point analysis procedure

M6.5 Troubleshooting and retesting

M6.6 Report

M7 PRESSURE REBOUND METHOD FOR VISCO-ELASTIC PRESSURE PIPELINES

M7.1 Application

M7.2 Pressure measurement rig

M7.3 Procedure

M7.4 Preliminary phase

M7.5 Air volume assessment

M7.6 Main test phase

M7.7 Report

M8 VISUAL TEST FOR SMALL PIPELINES

M8.1 Application

M8.2 Procedure

M8.3 Report

APPENDIX N - LEAKAGE TESTING FOR NON-PRESSURE PIPELINES

N1 SCOPE

N2 LOW PRESSURE AIR TEST

N2.1 Procedure

N2.2 Report

N3 VACUUM TEST

N3.1 Procedure

N3.2 Report

N4 HYDROSTATIC TEST

N4.1 Procedure

N4.2 Report

N5 INFILTRATION TEST

N5.1 Procedure

N5.2 Report

APPENDIX O - DIAMETRAL DEFLECTION MEASUREMENT

O1 SCOPE

O2 PIPELINES 750 mm DIAMETER

O2.1 Procedure

O2.2 Report

O3 PIPELINES >750 mm DIAMETER

O3.1 Procedure

O3.2 Report