tender for materials , supply and delivery of socket / spigot pipes for ductile iron pipes of standard length conforming to is 8329/2000 with inside lining with cement mortar of standard thickness and specifications and outside coating of metallic zinc as per is specifications of the following sizes. the rate including of loading transportation etc., complete and as directed by twad board officers at stockyard , ductle iron s/s k7 pipes , 450 mm di k9 s/s pipe , supply and delivery of di specials to the site of work (such as bends, tees & tapers etc., along the alignment of feeder mains) conforming to is 9523/2000 and as amended from time to time including loading, freight, unloading, stocking at site, transit insurance charges, all taxes, etc. complete and as directed by the twad board officers. (with out ed) required for the following pipes. , 450mm dia di specials (22.5 bend 4 nos) , supply and delivery of following sizes of mechanical joint collar including loading, transportation, insurance, unloading at site of work etc. complete and as directed by twad board officers. , 450 mm , supply and delivery of di d/f gate sluice valves (soft seated) resilient seated soft sealing gate valves(sluice valves) with body bonnet of ductile cast iron of grade ggg 40 or equivalent grade, wedge fully rubber lined with epdm replaceable spindle nut without gland packing and with 3 o - ring protection on the shaft and seals of nbr and the valves should be of vacuum tight and 100% leak proof with face to face dimensions as per bs 5163-89/isi 4846-2000/din 3202 f4. all the valves should be with electrostatic powder coating both inside and out side with pocket less straight through body passage. all the valves are to be compatible for buried application with pressure rating pn 10/16 , 250mm scour valve , supply and delivery of di specials to the site of work (such as bends, tees & tapers etc., along the alignment of feeder mains) conforming to is 9523/2000 and as amended from time to