Specifications Part 1 - Water Supply, Sewerage and Tube Well Works
Specifications Part 1 - Water Supply, Sewerage and Tube Well Works
Specifications Part 1 - Water Supply, Sewerage and Tube Well Works
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9.10.4.2 All fittings should have sufficient end length of pipe to accommodate overwrapped length of fitting <strong>and</strong> pipe.9.10.4.3 Fittings made by moulding: Moulded GRP fittings shall be made by h<strong>and</strong> layup,contact Moulding, hot or cold press moulding or tape winding.9.11 Tolerances for GRP Fitting9.11.1 Except for flanged pipe work, which may require closer tolerances, thepermissible deviations from the stated value of the angle of change of directionof a fittings such as a bend, tee or junction shall not exceed ± 1.9.11.2 Except for flanged pipe work, which may required closer tolerance, theength of a fitting,exclusive of the socket where applicable, shall be ± 25 mm taken from the pointof intersection to the end of the fitting.9.12 Jointing of PipesThe pipe shall have a jointing system that shall provide for fluid tightness forthe intended service conditions. Appropriate jointing for GRP pipe as per IS12709 shall be selected considering site <strong>and</strong> working condition, pressure <strong>and</strong>flow of liquids.9.13 . Tests to establish pot ability of water9.13.1 Pipe specimen shall be subjected to tests as per IS 12709-1994 specifiedbelow in order to establish the suitability of these pipes for use in carryingpotable water.i) Smell of the extract,ii)iii)iv)Clarity of the colour of the extract,Acidity <strong>and</strong> alkality,Global migration,v) UV absorbing material,vi)vii)viii)Heavy metals,Unreacted monomers (styrenes), <strong>and</strong>biological tests.9.14 GRP Pipes conforming to IS 14402 : 1996 for use for <strong>Sewerage</strong> Industrialwaste <strong>and</strong> water (other than potable) shall not be tested as mentioned above at9.13.1. This pipes may be used for raw water pumping also. While placingorder for procurement of pipes relevant code should be clearlymentioned according to the purpose for which pipes are to be used.9.15 Transportation, storage & lifting of pipe9.15.1 All pipes section <strong>and</strong> fittings shall be supported on timber saddles spaced at4m in centers with a maximum overhang of 2 m. Stock height should notgenerally exceed 2m. Pipes shall be strapped to the vehicle over the supportpoints using non-metallic pliable straps or ropes only. These may be canvas orUrban Administration & Development Department Page 107
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