REPAIR/MAINT/IMPV OF PIPE LINE, VALVES, VALVE PITS, WATER SUPPLY INSTALLATIONS, SUPPLY OF CHEMICALS AND CHLORINATION SYSTEMS ETC AT JALAPAHAR UNDER AGE (I) DARJEELING

Amount

Excavation in trenches n.exc 1.5m wide and n.exc 1.5 m in depth for foundation etc or for shafts, wells, cesspits, manholes, pier holes etc n.exc 10 sqm on plan and n.exc 1.5m in depth and getting out in soft/loose soil complete all as per specified and as directed by Engineer-in-charge.

Returning, filling in, including spreading, leveling, watering and well ramming in layers n exc 25cm complete all as per specified and as directed by Engineer-in-charge.

Removing excavated material not exc. 50 m & depositing where directed at a level not exc. 1.5 m above starting point complete all as per specified and as directed by Engineer-in-charge.

Taking out old existing galvanised iron water mains 80 mm bore or 90 mm PPR pipe (including all fittings) with spigot and socket ends and fittings for re-use in the work and removing unserviceable pipes and fittings from site complete all as per specified and as directed by Engineer-in-charge.

Refixing of 80 mm bore old steel tubing or 90 mm ppr pipe and connection in new or old position including cutting threads if required, fittings with old/new bends, elbows, socket, nipple, tapers, and reducers etc as per site requirement and laid in trenches or fixed to walls etc. and testing for leakages, complete all as per specified and as directed by Engineer-in-charge.

Supply & laying/fixing 3 layered (outer green coloured UV stabilized, middle black coloured UV stabilized and innermost layer white coloured with anti-microbial property) fusion welded PP-R (polypropylene Random Co-Polymer) pipes, ISI marked including plain PP-R fittings and brass threaded PP-R fittings such as flanges, elbow, bend, sockets, tee etc. as required at site and testing of joints of size 90mm OD (SDR – 7.4), PN-16, complete all as per specified and as directed by Engineer-in-charge.

S&F in repair gun metal globe or gate valve, with iron wheel head screwed both ends for iron pipe of 80 mm bore including dismantling unserviceable one, complete all as per specified and as directed by Engineer-in-charge.

S&F in repair 20 mm ball brass valves, high pressure, with polythene float and flynut complete, screwed for iron pipe or brass ferrule and fixed complete all as specified and as directed by Engineer-in-charge.

S&F in repair 25 mm ball brass valves, high pressure, with polythene float and flynut complete, screwed for iron pipe or brass ferrule and fixed complete all as specified and as directed by Engineer-in-charge.

S&F plastic cylindrical sealed disposable sanitiser refill containing Chlorine with arrangement for controlled release of disinfectant in water, suitable for stequa dosing refill pack AE 411 refill dosing system with following indication/ specifications- (a) Replacement indication: visual & weight variation. (b) Water contact orifice design: Sealed when dry, exposed upon immersion. (c) Operation type: Non-contact, non-inhalatory. (d) Cylinder dia: 2.5 inches ± 0.5 inches (e) Cylinder height: Minimum 10.0 inches ± 0.5 inches

M & L for repairing of Sluice valves of size 80 mm raising / non raising types after dismentling the same by replacing stem , gate/ disc , stuffing box, Seat, Gland packing, gland bush, gland falange, nutbolts, gasket, packing material, threading , welding as required for proper functioning of Sluice valves, complete all as specified and as directed by Engineer-in-charge. Note: Quoted rates inclusive of all the materials mentioned above like stem, gate/ disc, Seat stuffing box Gland packing, gland bush, gland falange, nutbolts, gasket, packing materia etc as required for proper functioning of the valves.

M&L for repair/rectification of leakages to water supply distribution lines 20mm/25mm bore GI tubing with provision of necessary excavation, cutting of hard standing, returning and filling in as required, tightening of loose joints of union, elbow, sockets etc, threading if required including replacement of GI unions / sockets / nipples as required at site, complete all as specified and as directed by Engineer-in-charge.

All as per serial item No. 12 above but for pipe of size 40-50 mm.

All as per serial item No. 12 above but for pipe of size 80 mm.

S&F in replacement of unserviceable woltman type water meter CI old or new position suitable for pipeline of size 40/50mm incl all necessary arrangements like cutting pipeline insertion of flange socket etc, complete all as per specified and as directed by Engineer-in-charge.

S&F in replacement of unserviceable woltman type water meter CI old or new position suitable for pipeline of size 80mm incl all necessary arrangements like cutting pipeline insertion of flange socket etc, complete all as per specified and as directed by Engineer-in-charge.

M&L for preparation of old painted brick / stone / plastered surfaces and applying one coat of synthetic enamel paint over a coat of priming paint plaster coat, complete all as specified and as directed by Engineer-in-charge.

Demolition of unreinforced cement concrete in ground floors and pavings nexc 15 cm thickness (below or above ground level) complete all as specified and as directed by Engineer-in-charge.

M&L for hardcore of guage not exc. 63mm deposited, spread and levelled in layers not exc. 15 cm thick, watered and rammed to a true surface of broken stone or boulders, complete all as per specified and as directed by Engineer-in-charge.

M&L for PCC (1:4:8) type D2 ( using 40mm graded crushed stone aggregate) as in foundation, filling and mass concrete complete all as per specified and as directed by Engineer-in-charge.

M&L for brick work with fly ash bricks, straight or curved on plan exc 6m mean radius, built in in CM (1:6), complete all as specified and as directed by Engineer-in-charge.

M&L for brick work with flyash bricks with honeycomb walling built in CM 1:6 complete all as specified and as directed by Engineer-in-charge.

M&L for rendering 15mm thick in CM 1:4 on fair faces of brick work or concrete surface finishing even and smooth without using extra cement, complete all as specified and as directed by Engineer-in-charge.

M&L for preparation of old decorated surfaces of ceiling and applying one coat of white wash, complete as specified and as directed by Engineer-in-charge.

M&L for preparation of old decorated wooden surfaces of any description over 10cm width or girth & applying one coat of synthetic enamel paint of any tint, complete all as specified and as directed by Engineer-in-charge.

M&L for preparing old distempared surfaces including washing, rubbing down and stopping and applying one coat of oil bound distemper on walls, complete all as per specified and as directed by Engineer-in-charge.

S&F in replacement FRP scale type conventional water level indicator including graduated FRP scale, mounting bracket, FRP coated GI float, indicator pin, counter weight, S S wire Rope, Float Guide pipe etc, complete all as per specified and as directed by Engineer-in-charge. Make- RMCO/Daclibac/Milton Ray/ Potter & watts. Note:-The contract sum shall be arrived at after deducting amount of schedule of credit from the total quoted amount.

Darjeeling Enterprises (BID ID -3436641)

THUKKEPA & PANGDOK (BID ID -3438305)

TSHERING WANGYAL BHUTIA (BID ID -3436661)