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. 528 4.0 PROCUREMENT OF D.I. PIPES, D.I. SPECIALS, SLUICE VALVE, 4.1 D.I. Pipes : BUTTERFLY VALVE ETC. 4.2 D.I. Specials Ductile iron pipes of K7/K9 class conforming to IS 8329 – 2000 (Latest version) with cement mortar lining from inside as per ISO 4179 and with Styrene Butadiene Rubber Rings (SBR) for joints. D.I./C.I. specials shall confirm to IS 9523 and shall be of K-12, K-14 Type. Specials shall have mortar lining from inside as per ISO 4179. Specials shall be jointed by push on joint by SBR ring on all sides and cost of specials shall be inclusive of SBR ring. However, if due the lead joint shall be made and shall be paid separately. The Contractor will have to procure D.I. Pipes with cement mortar lining of appropriate thickness as per I.S. to prevent corrosion from inside as well as to maintain minimum “C” valve of 130, rubber rings, specials and different types of valves as stated in Schedule “A”. Cracked pipes, butterfly valves and specials will be rejected. While loading and unloading pipes etc. shall not be thrown down from the trucks but must be unloaded to timber skids slowly without allowing the pipes to bmp against one another. In order to avoid damage to the pipes specially spigot and pipes shall not be dragged along the concrete and similar hard surface. The pipes and specials shall be stacked near to the contractors work chowki / site in a manner so that under no circumstances inconvenience is caused to any other agency or to the traffic or cause injury to the pedestrians. Butterfly valve shall be of relevant I.S. Mark.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 529 5.0 MORTAR LINING The Contractor shall procure mortar lined D.I. Pipes from inside to prevent corrosion from inside as well as to maintain minimum “C” valve of 130. the rate for D.I. pipes also includes labour, material, machinery, cost of SBR ring etc. in carrying out all operation of mortar lining the pipes. The mortar lining shall conform to ISO 4179. The maximum size of sand shall be 2.5 mm and clay content should be kept less than 2%. The proportion of cement and mortar shall be 1:1. 5.1 The pipes and specials before laying shall be brushed internally through out the length to remove any soil or stones that may have accumulated therein. Inside of socket and outside of the spigot shall be thoroughly cleaned. 5.2 The pipes shall be lowered in trenches carefully, in straight and in full length as far as possible in accordance with IS 12888-1987. Maximum deviation allowed will be 2 ½ % degree. Where site condition demand D.I. Pipes and specials shall be allowed to be cut to the required dimensions with the help of pipe cutting machineries or by hand as may be directed by the Engineer. 5.3 (A) On lowering the pipe in trenches, they will have to be jointed by means of styrene butadiene rings (SBR) conforming to relevant I.S. Code. (B) Jointing : Before assembling the joint, the spigot of pipe and the interior of the socket of the adjacent pipe should be thoroughly cleaned. Insertion of the SBR i.e. (rubber ring) conforming to IS 5382 & IS 12820 can be facilitated by the bulb eating inside the socket.
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