Technical Specification - UNDP
Technical Specification - UNDP
Technical Specification - UNDP
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20.4.1.5 Setting-Out ............................................................................................................................<br />
20.4.1.6 Excavation .............................................................................................................................<br />
20.4.1.7 Cutting Pavement and Surface Materials ...............................................................................<br />
20.4.1.8 Sheeting, Shorting and Bracing .............................................................................................<br />
20.4.1.9 Trench Excavation .................................................................................................................<br />
20.4.1.10 Depth of Trench .....................................................................................................................<br />
20.4.1.11 Width of Trench ....................................................................................................................<br />
20.4.1.12 Excavation for Valve Chambers ............................................................................................<br />
20.4.1.13 Unauthorized Excavation ......................................................................................................<br />
20.4.1.14 Elimination of Unsuitable Material .......................................................................................<br />
20.4.1.15 Disposal of Surplus Excavation Materials .............................................................................<br />
20.4.1.16 Access Across Trenches ........................................................................................................<br />
20.4.1.17 Backfilling .............................................................................................................................<br />
20.4.1.18 Fill and Backfill Under Structures .........................................................................................<br />
20.4.1.19 Backfilling around Structures ................................................................................................<br />
20.4.1.20 Backfilling Pipe Trenches .....................................................................................................<br />
20.4.1.21 Preparation of Subgrade ........................................................................................................<br />
20.4.1.22 UPVC and MDPE Pipes, Fittings and House Connections ...................................................<br />
20.4.2 Service Connections ..........................................................................................................<br />
20.4.3 Thrust Blocks, Anchors and Concrete Surrounding .........................................................<br />
20.4.4 Location of Vlaves .............................................................................................................<br />
20.4.5 Pipes Protruding from Structures, Concrete Surrounds and Anchor Blocks ...................<br />
20.4.6 Protection of Pipelines and Pipeline Components ............................................................<br />
20.4.6.1 Pipelines ................................................................................................................................<br />
20.4.7 Indicator Posts to Pressure Mains ....................................................................................<br />
20.4.7.1 Cleaning, Testing and Disinfection .......................................................................................<br />
20.4.7.2 Manholes and Chambers .......................................................................................................<br />
20.4.7.3 Abandonment ........................................................................................................................<br />
20.4.7.4 Reinstatement of Roads and Paving ......................................................................................<br />
20.4.7.5 Miscellaneous Welding .........................................................................................................<br />
20.4.7.6 Safety Procedures ..................................................................................................................<br />
20.4.8 <strong>Technical</strong> <strong>Specification</strong> for Used Materials ......................................................................<br />
20.4.9 Preliminaries .....................................................................................................................<br />
20.4.9.1 General ..................................................................................................................................<br />
20.4.9.2 Protection ..............................................................................................................................<br />
20.4.9.3 Identification .........................................................................................................................<br />
20.4.10 Handling .......................................................................................................................<br />
20.4.11 Pipes .............................................................................................................................<br />
20.4.11.1 General ..................................................................................................................................<br />
20.4.12 Unplasticised Polyvinyl Chloride ( UPVC ) Pipes .......................................................<br />
20.4.13 Medium Density Polyethylene ( MDPE ) Pipes ...........................................................<br />
20.4.14 Pipe Fittings .................................................................................................................<br />
20.4.14.1 General ..................................................................................................................................<br />
20.4.15 Materials ......................................................................................................................<br />
20.4.16 Couplings and Flange Couplings .................................................................................<br />
20.4.17 Flanged Fittings ...........................................................................................................<br />
20.4.18 Valves ...........................................................................................................................<br />
20.4.18.1 General ..................................................................................................................................<br />
20.4.19 Gate Valves ..................................................................................................................<br />
20.4.20 Air Valves .....................................................................................................................<br />
20.4.21 Fire Hydrants ...............................................................................................................<br />
20.4.22 Accessories ...................................................................................................................<br />
20.4.22.1 Surface Boxes and Chambers ................................................................................................<br />
20.4.23 Tapping Saddles ...........................................................................................................<br />
20.4.24 Ferrule Cocks ...............................................................................................................<br />
20.4.25 Repair Collars ..............................................................................................................<br />
20.4.26 Stop Taps ......................................................................................................................<br />
20.4.27 Combined Tracer and marker Tape .............................................................................<br />
20.4.28 Manuals and <strong>Technical</strong> <strong>Specification</strong>s .........................................................................<br />
20.4.29 Guarantees and Warranties .........................................................................................<br />
20.4.30 Appendix A – List of Standards ....................................................................................<br />
21 INSPECTION, TESTING AND COMMISSIONING ..................................................................<br />
21.1 INSPECTION AND TESTING OF PIPELINES .................................................................................<br />
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