supply and delivery of different type of pvc pipe with fittings, gravel, surge pipe etc. for maintenance and repair works of different m.i. schemes under lalgola (a-i) sub-division within berhampore-ii(a-i) division under non-plan , supply and delivery of materials , supplying of upvc pipes (class-i) is: 4985/2000 certification marked with latest amendments lvorycoloured end plane, along with one matching coupler / socket (class-ii ) duly is: 10124/ 1988 marked and required solvent cement duly is: 14182/1994 marked for each pipe. length of eatch straight pipes 6 meters with tolerance (+) 10 mm upto the destination point inclusive of all charges. 140 mm dia (class-i) , supplying for reducer comprising of two straight reducer is: 10124 (part-8) / 1988 with latest amendments upto the destination point inclusive of all charges. 160 x 140 mm dia upvc reducer , supplying upvc fittings isi marked- is 10124 160 mm ftp , supplying of upvc coupler (class-i) is: 10124 ( part i&ii) / 1988 withlatest amendments upto the destination point inclusive of all charges. 160 mm coupler , supplying of upvc coupler (class-i) is: 10124 ( part i&ii) / 1988 withlatest amendments upto the destination point inclusive of all charges. 140 mm coupler , supply of solvent cement (havy bodied) , supply of gravel for use as pack in tube well of 2 mm to 4 mm size (as per is: 4097) and gravel treatment of tubewell including screening, washing, cleaning etc. of the gravels at the site, all complete as per direction of the engineer-in-charge. i) for sites within 4 km. from all weather metal road b) for south bengal district , 80 mm dia m.s. surge pipe of 3 metre long made of 80 mm n.b. erw pipe conforming to is:1234(pt-1) 2004, medium quality one end 80 mm flange welded of 10 mm thickness conforming to is:6392/71, table-17