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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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12.4 Dimensions of Pipes:12.4.1 Mean outside diameter- The mean outside diameter, outside diameter at anypoint <strong>and</strong> tolerances shall be as given in table 1 of IS 15328 <strong>and</strong> shall bemeasured according to the method given in IS: 12235 (part-1).12.4.2 Wall thickness- The nominal wall thickness, e, shall be in accordance with table2 of IS 15328. Tolerances in outside diameters shall be those given in IS 498512.4.3 Length of pipes:12.4.3.1 Effective length (Le) of pipe with sockets is considered to be the distancebetween ends minus the socket depth. The length may be supplied as agreedto between the purchaser <strong>and</strong> the manufacturer.12.4.4 Dimensions of Integral Sockets <strong>and</strong> Spigots ends: The Basic dimensions shallbe in accordance with Tables 3 <strong>and</strong> 4.12.4.4.1 Wall Thickness of Sockets: e2 min = 0.9e <strong>and</strong> e3 min = 0.75e12.4.4.2 e3min applies only to those parts of the sealing ring zone where the fluidcontained within the pipe comes into contact with the fluid, that is beyond thedesignated ring seal point, walls thinner than e3 are permitted.12.4.4.3 If retaining caps or rings are provided, they can be made to other designs orfrom polymers other than unplasticized polyvinyl chloride, provided that thefinished joint conforms to the same functional test requirements.12.4.4.4 When a sealing ring is retained by means of a retaining ring or cap, the wallthickness of the area shall be calculated by addition of the wall thickness at thecorresponding places of the socket <strong>and</strong> the retaining ring or cap.12.5 Physical characteristic12.5.1 Colour- The colour of the pipes shall be dark (any shade of brown). The pipeshall be uniformly coloured throughout the entire wall. Slight variations in theappearance of the colour are permitted.12.6 Marking12.6.1 Each pipe shall be clearly <strong>and</strong> indelibly marked in ink/paint or hot embossed onwhite base at intervals of not more than 3 m. but at least once per pipe, in thecolour so that it differs from the basic color of the pipe.12.6.2 The marking shall be legible without magnification. The marking shall notinitiate cracks or other types of defects which adversely influence theperformance of the pipe. Marking by indentation reducing the wall thickness notmore than 0.15 mm shall be deemed to conform to this clause withoutinfringing the requirements for the wall thickness.Urban Administration & Development Department Page 138

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