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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a)b) Size of the fitting <strong>and</strong> the appropriate class (working pressure) of IS:4985-2000 to which the pressure rating of the fitting corresponds.5.12.4.2 PVC fittings also conforming to specific requirements as prescribed in therelevant parts of the st<strong>and</strong>ard may also be marked with the st<strong>and</strong>ard Mark.5.12.5 Specific requirements for various pvc socket fittings with solvent cement jointsfor water supplies shall be as mentioned below:Table No.5.5S.No Type of fittings Relevant IS code1. 45º Elbows IS: 7834 (<strong>Part</strong>-2)-19872. 90º Elbows IS: 7834 (<strong>Part</strong>-3)-19873. 90º Tees IS: 7834 (<strong>Part</strong>-4)-19874. 45º Tees IS: 7834 (<strong>Part</strong>-5)-19875. Sockets IS: 7834 (<strong>Part</strong>-6)-19876. Unions IS: 7834 (<strong>Part</strong>-7)-19877. Caps IS: 7834 (<strong>Part</strong>-8)-19875.13 Solvent cement jointing5.13.1 PVC solvent cement is quick drying, therefore it shall be applied as quickly <strong>and</strong>carefully as possibly <strong>and</strong> in consistence with good workmanship. For largersizes, it is advisable for two workers to work simultaneously on the pipe <strong>and</strong>socket.5.13.2 Solvent cement shall conform to IS:14182.5.13.3 Dip the applicator brush in the solvent cement <strong>and</strong> apply a liberal coat ofcement to the end of the pipe up to the insertion depth.5.13.4 Apply a uniform thin coat of cement inside the socket, working axially from theinside of the socket to the outside. Do not apply any cement on the shouldersof the socket (socket-to-pipe transition area). Care should be taken not to applyexcess cement inside the socket. Excess cement in the socket will be pushedfurther into the pipe during assembly <strong>and</strong> cause the pipe to soften <strong>and</strong> weakenat that point. Hot <strong>and</strong> dry climates generally require slightly thicker coatings ofsolvent cement.5.13.5 In climates with large differences between day <strong>and</strong> night temperatures, it isadvisable to make joints early in the morning or in the evening when it is cooler.Thus, the joints are prevented from being pulled apart if the pipes contract.5.13.6 For pipe installation solvent glued spigot is inserted in the socket up to theshoulder <strong>and</strong> then after a quarter (90º) turn is given to evenly distribute thecement over the treated surface.Urban Administration & Development Department Page 60
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