supply and laying of gi pipe with replacement of different type electro-mechanical spare, led tube at howrah subway complex area.- 1 providing, laying, testing & commissioning of b class heavy duty g.i. pipe conforming to is 1239 including welding, fittings like elbows, tees, flanges, tapers, nuts, bolts, gaskets etc. and fixing the pipe on the wall / ceiling with suitable clamp / support frame and painting with two or more coats of synthetic enamel paint of required shade complete as required : 2 100 mm 3 150 mm 4 supplying, fixing, testing & commissioning of double flanged sluice valve of rating pn 1.6 with non rising spindle, bronze / gun metal seat, isi marked complete with nuts, bolts, washers, gaskets and conforming to is 780 of following sizes as required : 5 100mm dia 6 150mm dia 7 supplying, fitting and fixing cast iron extension pipes for using in traps only ( connector ) conforming to i.s.3989 / 2009 and 1729 / 2002 including lead caulked joints complete and painting two coats to the exposed surface with approved paint complete. ( payment of painting will however be paid seperately ) .100 mm x 150 mm 8 supplying, fitting & fixing centrifugally cast ( spun ) iron ( hubless ) bend without door conforming to i.s. 15905 / 2011 including all joining materials but excluding coupling.150 mm dia.- 88 degree 9 supplying, fitting and fixing centrifugally cast ( spun ) iron ( hubless ) composite 88 degree t -y single branch conforming to i.s. 15905 / 2011 including all joining materials but excluding coupling. ( coupling to be paid seperately ) .150 mm 10 supplying & fixing rewirable switch fuse units of following size: 11 triple pole & neutral 32a / 415v- side handel version, type-shf, with less cost of old dismantled item. [ make: standard or, equivalent / cat. no-issrte4032 ] 12 triple pole & neutral 63a / 415v- side handel version, type-shf, with less cost of old dismantled item. [ make: standard or, equivalent / cat. no-isfrte4063 ] 13 supplying & fixingof tp moving contact assembly of following size: 14 63 amp. 415v ac, with less cost of old dismantled item. [ code ref.-pgh9000001, list no.- ch633 ( u ) ] . 15 100 amp. 415v ac, with less cost of old dismantled item. [ code ref.-pgh9000002, list no.- ch1003 ( u ) ] . 16 315 amp. 415v ac, with less cost of old dismantled item. [ code ref.-pgh9000004, list no.- ch3153n ( u ) ] . 17 supplying & fixingtp shrouded base assembly of following size: 18 63 amp. 415v ac, with less cost of old dismantled item. [ code ref.-pgh9000012, list no.- ch633 ( u ) ] . 19 supplying & fixingof following size: 20 mas led tube type ( pc body ) 1200mm, 18w, 865 t8 l - 2100lm, [ make:philips or, equivalent ] . 21 add gst@12% 22 add labour cess @ 1%