1 - AS 3723-1989 INSTALLATION AND MAINTENANCE OF PLASTICS PIPE SYSTEMS FOR GAS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 REFERENCED DOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Approved and approval
6 - 1.3.2 Authority, Operating
6 - 1.3.3 Authority, Statutory
6 - 1.3.4 Backfill
6 - 1.3.5 Bedding material
6 - 1.3.6 Electrofusion fittings
7 - 1.3.7 Gas
7 - 1.3.8 Hot tap
7 - 1.3.9 Insertion
7 - 1.3.10 Main
7 - 1.3.11 Pressure.
7 - 1.3.12 Purging
7 - 1.3.13 Service
7 - 1.4 MATERIALS.
7 - 1.4.1 Pipe and fittings.
7 - 1.4.2 Rubber rings.
7 - 1.4.3 Lubricants for rubber ring and expansion joints.
7 - 1.4.4 Adhesives and cleaning or priming fluids.
8 - SECTION 2. GENERAL REQUIREMENTS FOR THE SELECTION AND USE OF PLASTICS PIPES AND GAS
8 - 2.1 SCOPE OF SECTION.
8 - 2.2 HANDLING AND STORAGE.
8 - 2.2.1 General.
8 - 2.2.2 Handling.
8 - 2.2.3 Storage.
8 - 2.2.4 Coils.
8 - 2.2.5 Pipe stacking.
8 - 2.3 SAFETY
8 - 2.4 THERMALEXPANSION.
10 - SECTION 3. JOINTING METHODS
10 - 3.1 SCOPE OF SECTION.
10 - 3.2 POLYAMIDE PIPE AND FITTINGS.
10 - 3.2.1 General.
10 - 3.2.2 Adhesive joints.
10 - 3.2.3 Mechanical joints.
11 - 3.3 POLYETHYLENE PIPE AND FITTINGS.
11 - 3.3.1 Fusion joints.
11 - 3.3.2 Butt fusion.
11 - 3.3.3 Socket fusion.
12 - 3.3.4 Saddle fusion.
14 - 3.3.5 Electrofusion jointing of PE.
14 - 3.3.6 Mechanical joints.
15 - 3.4 UPVC PIPE AND FITTINGS.
15 - 3.4.1 General.
15 - 3.4.2 Solvent joints.
15 - 3.4.3 Mechanical joints.
17 - SECTION 4. STOPPING THE GAS FLOW
17 - 4.1 GENERAL METHODS.
17 - 4.2 BAGGING-OFF.
17 - 4.3 SQUEEZING-OFF.
17 - 4.3.1 General.
17 - 4.3.2 Preliminary assessment.
17 - 4.3.3 Return to service.
17 - 4.4 BENDING-BACK.
17 - 4.5 CAPPING.
17 - 4.6 SAFETY.
20 - SECTION 5. INSTALLATION OF PLASTICS PIPES FOR GAS
20 - 5.1 INSTALLATION OF GAS PIPING.
20 - 5.1.1 Excavation and bedding.
20 - 5.1.2 Boring and conduits
20 - 5.1.3 Ploughing-in.
20 - 5.1.4 Installing pipe.
21 - 5.1.5 Tie-ins.
21 - 5.1.6 Marker tape and tracer wire.
21 - 5.1.7 Insertion.
21 - 5.1.8 Purging.
22 - SECTION 6. TESTING AFTER INSTALLATION
22 - 6.1 GENERAL.
22 - 6.2 PRESSURE TESTING.
22 - 6.3 TEST PROGRAM.
22 - 6.4 PREPARATION OF THE TESTING EQUIPMENT.
22 - 6.5 PREPARATION OF THE TEST SECTION.
22 - 6.6 PRESSURIZATION.
22 - 6.7 TEST PROCEDURE.
23 - 6.8 ASSESSMENT OF THE TEST.
23 - 6.9 DISPOSAL OF TEST FLUID.
23 - 6.10 COMMISSIONING OF TEST SECTION.
24 - SECTION 7. MAINTENANCE OF PLASTICS PIPING
24 - 7.1 GENERAL.
24 - 7.2 MAINS.
24 - 7.3 SERVICES.