Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

12.6.3 The marking shall show the following:a) Identification of the source of manufacturer.b) Outside diameter,c) Stiffness class, andd) Batch or Lot number.12.6.4 BIS Certification Marking12.6.4.1 Each pipe may also be marked with the standard Mark.12.7 Solvent cement jointing12.7.1 PVC solvent cement is quick drying, therefore it shall be applied as quickly andcarefully as possibly and in consistence with good workmanship. For largersizes, it is advisable for two workers to work simultaneously on the pipe andsocket.12.7.2 Solvent cement shall conform to IS:14182.12.7.3 Dip the applicator brush in the solvent cement and apply a liberal coat ofcement to the end of the pipe up to the insertion depth.12.7.4 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 and cause the pipe to soften and weakenat that point. Hot and dry climates generally require slightly thicker coatings ofsolvent cement.12.7.5 In climates with large differences between day and 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.12.7.6 For pipe installation solvent glued spigot is inserted in the socket up to theshoulder and then after a quarter (90º) turn is given to evenly distribute thecement over the treated surface.12.7.7 Within 20 second after the last application of solvent cement, insert the pipe into socket in a single steady and every controlled but forceful action. Press it infully until it bottoms. No. hammer blows should be used. If there is any sign ofdrying of the cement coat before insertion; the surface should be re-coated,avoiding application of excess cement in the socket. Once the insertion iscomplete, hold in place for 1 min without shifting the pipe in the socket.12.7.8 Immediately after assembly, wipe the excess solvent cement from the pipe atthe end of the socket. A properly made joint will have a uniform bead around itsentire perimeter. Any gaps in this bead may be indicative of an improper jointdue to insufficient cement or the use of a lighter-bodied cement than the onerecommended.Urban Administration & Development Department Page 139