REPAIR / MAINT / IMPV OF WATER SUPPLY INSTALLATIONS / DISTRIBUTION MAINS AND ALLIED WORKS AT LEBONG UNDER AGE(I) DARJEELING

Amount

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, under groung cables etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft/loose soil, complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cm. in soft/loose soil, complete all as specified and as directed.

Removal of surplus excavated soils to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.50m above the starting point, complete all as specified and as directed.

Taking up or down old steel tubing and connections, including cleaning for refixing or removal to store or removal unserviceable pipe from site, complete all as specified and directed of the following sizes:-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Refixing of old steel tubing 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 on wall etc and testing for leakages, complete all as specified and directed for the following sizes:-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Supply and laying steel water tubing GI medium grade as in old/new position or in place of PVC/PPR pipe as per site requirement including all fittings such as elbow, union, reducer, tees, bends etc and short length, laid in trenches or fixed on wall etc. and testing for leakages, complete all as specified and directed for the following sizes:-

20 mm bore

25 mm bore

40 mm bore

50 mm bore

80 mm bore

Supply and fix in repairs of stop valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed screwed both ends for iron pipes or fixed in new position as per site requirement, complete all as specified and directed for the following sizes:-

20mm dia bore

25mm dia bore

40mm dia bore

50mm dia bore

Supply and fix in repairs of 80mm dia gun-metal, globe or gate valves, with iron wheel head, screwed both ends for iron pipe and fixed for iron pipes or fixed in new position as per site requirement, complete all as specified and directed.

S&F in replacement of unserviceable ball brass valves / float valves, high pressure with polythene float and flynut alongwith socket/reducer of suitable size, screwed for iron pipe or brass ferrule and fixed, complete all as specified and directed for the following sizes:-

20mm dia bore

25mm dia bore

M&L for arresting leakages of sluice valves by replacing Gland packing, gland bush, gland falange, nutbolts, gasket, packing material as required after dismantling in existing position including testing on completion, complete all as specified and directed for the following sizes:- (Note: Quoted rates inclusive of the materials mentioned above like Gland packing, gland bush, gland falange, nutbolts, gasket, packing materia etc as required to arrest the leakages.)

80 mm bore

100 mm bore

M&L for replacement or in new position of structural steel sections any shape and size made with cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including welding, bending cold or hot, drilling holes for hinged, in any shape or size as indicated for valve chamber top cover or as & where required, thickness of sheet 2-3mm for MS sheet cover fixed on 40 mm X 40 mm X 6 mm thick angle iron frame with locking arrangement, mild steel handle/hash bolt, and painting to steel surfaces with two coats of synthetic enamel paint over one coat of primer including disposal of surplus soil to a distance not exceeding 50m etc., complete all as specified and directed.

M&L for providing cement concrete (1:3:6), type C-1, (using 20 mm graded aggregate) as in coping /parepet wall/bed plate /Kerb stone etc with plain fair faces including chamfers, weathering, slightly rounded or chamfered angles and throating, including necessary form work, complete all as specified and directed.

M&L for plain cement concrete (1:2:4), type B-1 (using 20 mm graded stone aggregates) as in foundation filling and mass concrete, path, foothpath, road etc., complete all as specified and as directed.

S&F of jointing and testing of cast iron Sluice Valve ISI mark (PN-1.6) of size 80 mm bore confirming to IS 14846-2000, flanged ends drilled having stainless steel spindle with cast iron wheel at top complete with nuts, bolts, washers and gaskets, complete all as specified and as directed.

Providing & applying two coats of Aqua Arm Top Guard inside of the wall & floor of the tank, a two components ready to use polymer modified cementatious coating . First Coat should be applied horizontzlly and second coat should be applied verticallyThe thickness of coating shall not be less than 1.5mm, complete all as specified and directed. Note: Work to be executed by the authorized applicator of manufacturer only.

Providing & applying two coats Sikagard 67 or Aqu Arm Tank Coat, a water based epoxy coating certified for portable water on all over the concrete surface from inside.Apply the first coat by brush allow it to dry for 6-8 hrs and then apply 2nd coat and allow it to cure complete 24 hrs The coating shall be applied using brush application. The Thickness after two coating should not be less than 500 microns complete all as specified and directed. Note: Work to be executed by the authorized applicator of manufacturer only.

Repairing of 80 mm Dia sluice valves 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 directed. 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 80 mm Dia.

M&L for two coat painting of sluice valve 80mm or above by using black synthetic enamelled painting after scrapping /cleaning, complete all as specified and directed.

M&L for two coat painting of pipeline 80mm by using red/yellow/sky blue synthetic enamelled painting after scrapping /cleaning, complete all as specified and directed.

Supply only GI fittings any type as required at site suitable for 20-25 mm bore pipe, medium grade, ISI marked, smooth finished and make embossed on fittings, complete all as specified and directed.

Supply only GI fittings any type as required at site suitable for 40-50 mm bore pipe, medium grade, ISI marked, smooth finished and make embossed on fittings, complete all as specified and directed.

Supply only GI fittings any type as required at site suitable for 80-100 mm bore pipe, medium grade, ISI marked, smooth finished and make embossed on fittings, complete all as specified and directed.

Repair / rectification of leakages to water supply distribution lines 20mm / 25mm bore GI/PPR 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 directed.

Repair / rectification of leakages to water supply distribution lines 40mm to 50mm bore GI/PPR 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 directed.

Repair / rectification of leakages to water supply distribution lines 80mm bore GI/PPR 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 directed.

Collection Bacteriological and Chemical Testing of warer samples from Govt/Authorised Lab, complete all as specified and directed.

M&L for painting of water distribution header including all control valves and all exposed pipe of any size by using synthetic enamelled painting after scrapping /cleaning, complete all as specified and directed.

Note 1:- (Applicable for all parts/items) : The bidders/contractors are advised to read tender document, all drawings & all corrigendum / amendments and general condition of contracts before entry / quoting the rates. Note 2:-The contract sum shall be arrived at after deducting amount of schedule of credit from the total quoted amount.

TSHERING WANGYAL BHUTIA (BID ID -3088858)

JALAPAHAR HARDWARE (BID ID -3088310)

Damdoo Bhutia (BID ID -3089043)