operation and maintenance of 15 mld wtp at chandel in pernem taluka- procurement of pvc and c.i. fittings for maintenance works. ( 2nd call ) operation and maintenance of 15 mld wtp at chandel in pernem taluka- procurement of pvc and c.i. fittings for maintenance works. ( 2nd call ) , supplying at store or site of work rigid pvc ( sel fit ) pipes for public water supply including railway freight, carting, loading and unloading, stacking, transit insurance etc. complete, conforming to is: 4985-2000, and bearing isi mark, class 6 kg / cm2. , outer dia in mm , 63 mm , 75 mm , 90 mm , 110 mm , 160 mm , supplying at store or site of work including railway freight, carting, loading and unloading, stacking, transit insurance etc., cast iron detachable joints conforming to is: 8794-1978 suitable for pvc pipes including cost of rubber rings, nuts, bolts etc.class 6. , dia in mm , 63 mm , 90 mm , 110 mm , supply of rigid pvc fittings conforming to is: 7834- 1975 designed for precision and accuracy so as to join pvc pipes and other specials including railway freight, carting, loading and unloading and stacking etc. complete. , elbow pn 6 ( 6 kg / cm2 ) , dia in mm , 63 mm , 75 mm , 90 mm , 110 mm , 160 mm , tee pn 6 ( 6 kg / cm2 ) , dia in mm , 63 mm , 75 mm , 90 mm , 110 mm , 160 mm , coupler plain pn 6 ( 6 kg / cm2 ) , dia in mm , 63 mm , 75 mm , 90mm , 110mm , 160mm , supply of pvc cement solvent suitable for jointing of pvc pipes , supplying cast iron fittings as per is : 1538 -1993 including sealing rubber gasket ( nr ) ci compression glands and coated ms nuts bolts. , flanged socket tail piece ( flanged adaptors ) , nominal dia in mm , 100 mm , 150 mm , long sleeve collar coupling ( cut & repair coupling ) , nominal dia in mm , 100 mm , 150 mm , supplying at store or site of work including railway freight, carting, loading, unloading, stacking etc. c. i. sluice valve conforming to is:14846-2000 and bearing isi mark double flanged / plain ended with cap. type p.n. 1.6 ( class b ) , dia in mm , 100 mm , 150 mm , supplying at store or site of work including railway freight, carting, loading, unloading, stacking etc. c. i. single large orifice air valve similar to glen field fig h4 or similar with steel ferrule at inlet screwed suitable to working pressure of 10kg / sq.cm. ( class b ) , dia in mm , 25 mm , supplying at store or site of work including railway freight, carting, loading, unloading, stacking etc. c. i. double orifice type air valve similar to glenfield fig. h 7, or is14845 / 2000 screwed on isolating valve small orifice, elastic ball resting on a bronze orifice nipple, large orifice vulcanite ball resting on a moulded seating, inlet faced and drilled bst d suitable to working pressure of 10 kg / cm2 type p.n. 1.0 ( class b ) , dia in mm , 50 mm