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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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5.12 Fittings:-5.12.1 Size of FittingsThe sizes of the fittings shall be designated by the diameters of their sockets.The inside diameters of the sockets of the fittings shall correspond to theoutside diameters of the pipes given in IS: 4985-1988. The general requirementof the pvc socket fittings shall conform to IS: 7834 (part-1) 1987.5.12.2 Minimum thickness:-Thickness at any place in a fitting shall not be less than 3mm.5.12.3 Socket length <strong>and</strong> diameter at Mid-point of socket Length5.12.3.1 The minimum socket length of any fittings shall be as given by the expressionL= 0.5 D + 6 mm with a minimum of 12 mm.Where:-L = socket length, <strong>and</strong>D = nominal inside diameter of fittings (corresponding to the outsidediameter of the pipe)5.12.3.1.2 The socket length is applicable to socket fittings for pipes of any diameterunder pressure. The minimum socket lengths based on the formula in 8.3.1 forsocket.5.12.3.2 The maximum <strong>and</strong> minimum dimensions of mean inside diameter at mid-pointof socket depth shall comply with those given in table 5.4.Table No. 5.4Socket dimensionsAll dimensions in millimeters.(Refer Table No. 1 IS 7834 (part-1) -1987)Nominal SizeMinimum Socket Mean socket internal diameter at Mid-LengthPoint of socket LengthMinimumMaximum(1) (2) (3) (4)90 51 90.1 90.3110 61 110.1 110.4125 69 125.1 125.4140 76 140.1 140.5160 86 160.2 160.5180 96 180.2 180.5200 106 200.3 200.65.12.4 Marking for fittings5.12.4.1 All fittings shall be clearly <strong>and</strong> indelibly marked at a prominent place visibleeven after the installation of the fittings with the following:Urban Administration & Development Department Page 59

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