tender for earth work excavation in all class of soil such as hard stiff clay soil for pipe line works as per standard specification for pipe line trunch,oht tank supply , labour for cutting open road for laying water mains or sewer. a, bituminous road removal , labour for cutting open road for laying water mains or sewer,concrete roads , supply and delivery of following materials 160mm hdpe pipe pn -8 is 4984/2016 , supply and delivery of following materials 160 mm hdpe elbow , supply and delivery of following materials c.i.d joint class 20 (wd-m0423) twad sor , ductile iron class pn10 flanged pipes as per is 8329/2000 3 mtrs span 150mm (wd-m0715) twad sor , ductile iron class pn10 flanged elbow 150mm (wd-m0786) twad sor , ms bolts and nuts 16 mm dia x 65 to 90 mm length fully threaded bolts and nuts with 2 nos. (wd-m0589) , rubber sheet for flange set twad sor , laying of hdpe pipes and specials in proper alignment etc.complete 160mm hdpe pipe pn -6 is 4984/2016 , jointing hdpe pipes and specials by butt fusion welding / electro fusion welding joints using fusion equipment as per iso 21307-2011 and as per is 7634 (part-2) : 2012 including cost of hire charges for butt fusion equipment power supply arrangements etc., complete as per directed by twad board officers , refilling the excavated earth to pipe line trench including all charges etc., complete. , testing of pipes for water supply with hydraulic testing equipment by filling with water (including cost of water) and testing to recommended pressure in convenient stretches and attending the bursts if any occured during the test, excluding the cost of pipes but including other incidential and operational charges etc., complete for the following diametres of pipes.