particular specifications (road works) - CIDCO Maharashtra Ltd.

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CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 532 6.2 Caulking the joint shall be done after the lead is poured. All excess lead protruding outside of the socket shall be removed with a flat chisel and joints caulked number of times (minimum three) all along the circumferential joints to make the joint watertight. The joint when completed should be flush, neat and even with the socket. Where the pipes are not laid in continuous lengths but in stretches, the open ends of the pipes shall be provided with wooden plug covered with hession cloth to prevent access to dirt etc. At certain places for jointing two faces of pipes a collar joint will have to be provided if directed by the engineer. The collar joint will be paid under the same rate as for socket and spigot, but collar joint will be treated as two joints of the spigot and socket type. This item included dewatering of trenches. 6.3 After completion of pipe laying work in whole length or in parts as decided by the Engineer, the trench shall be partially filled back except at the joints before taking up the hydraulic test. In each case the contractor has to close both ends of the section of pipe line to be tested either by providing cap, blank flange or by sluice valve as per directions of the engineer. If necessary both the ends shall be properly anchored by providing M-20 c.c. blocks of required dimensions. Payments will be made for providing these c.c. block under the respective items. Contractor shall provide required number of plug points with ferrule of required diameters to save as injection points, air relief points etc. on the completion of the test, these points shall be closed by the plugs by the contractor. No separate payment will be made for this. The contractor shall make necessary arrangement to fill the section of main to be tested by taking available size connection from existing main nearby or from any other sources. The charges for water supplied, for making and removing connection will have to be borne by the contractor only.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 533 6.4 Testing will be carried out by contractors under the guidance of Engineer. The Contractor shall disinfect the entire pipeline as directed by the Engineer before carrying out testing. Contractors shall provide the required machinery, equipments and technical staff for testing the pipeline. A section of the pipe shall be considered satisfactory only when leakage is less than 425 litres/25 mm dia km/day at 9 kg/cm 2 pressure and as per relevant IS. If the first test is not found satisfactory, repeated tests after the necessary repairs will be undertaken and procedures as mentioned above shall be followed. 6.5 When the section of the pipe line is tested successfully, the Contractor shall back fill the portion as per direction of the Engineer. The cost of testing the pipe line shall be deemed to have been included in the cost of laying the pipeline and no separate payment shall be made as referred above. 7.0 PIPES & APPURTENANCES : D.I. Pipes (S &S) type and appurtenances such as butterfly valve etc. shall be supplied by the contractor himself and they himself shall make their own arrangements to purchase it from market and transport it to the site of work. The butterfly valve shall consist of all necessary fittings. The rate includes the cost of materials, cost of rubber packing, washer, nut bolts etc. which also shall be provided by the contractors without any extra cost. 7.1 Before procurement of valves, approval shall be taken from Engineer regarding make and valves shall be tested at manufacture’s factory before dispatch to site. Before valves are fixed, they shall be cleaned and greased. It should be seen that all the parts are in perfect
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particular specifications (road works) - CIDCO Maharashtra Ltd.

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