SPECIAL REPAIRS TO EXTERNAL WATER SUPPLY AT FORT SAINT GEORGE UNDER AGE(I) NAVY CHENNAI.

Amount

Excavation in trenches not exc 1.5m wide & not exc 1.5m in depth for foundation for laying of CI /GI pipe line/ Cable in trenches not exc 10sqm on plan & not exc 1.5m in depth & getting out in soft / loose soil complete all as specified.

Returning, filling in trenches including spreading, leveling watering and well ramming in layers not exceeding 25cm in soft/loose soil complete all as specified.

Removing excavated material to a distance not exc 50mtr and depositing where directed at level n exc1.5 mtr above the starting point complete all as specified.

Taking up GI pipe steel tubing from trench/walls etc including all fittings for following bore of pipe:

50 mm bore

25 mm bore

Supply and laying galvanized steel tubing medium grade 50 mm bore with all fittings such as tees, bends,elbows ,reducer , union nipples etc including all fixing accessories such as couplers hooks,nuts saddles pipe hooks laid in trenches/under floor or fixed walls complete all as specified

All as per item 5.00 above but 25 mm bore

Supply and fixing (in repairs) gun metal globe or gate valve with iron wheel head screwed both ends for iron pipe and fixed of size 50 mm bore

All as per item 6.00 above but 25 mm bore

Disconnecting and taking out existing centrifugal pump set of any capacity, electric driven 3 phase 415 volt including transporting to workshop and Re-fixing in the same position after repair complete all as specified and directed

Rewinding of submersible pump/motor after disconnecting motor from casing and dismantling from casing/ pipe , taking down burnt winding wire of field coil and rewinding of motor for suitable size of super enameled copper winding wire with necessary insulation materials including replacement of motor bearing of both NDE & DE sides with pump and necessary connection etc all as specified and directed for 5 HP motor.

Rewinding of centrifugal pump/motor after disconnecting motor from pump and dismantling the motor, taking down burnt winding wire of field coil and rewinding of field coil for suitable size of super enameled copper winding wire with necessary insulation materials including replacement of motor bearing of both NDE & DE sides with pump and necessary connection etc all as specified and directed.

Supply and fix in repair of following parts for existing centrifugal pump set electric driven 3 phase 415 volt 15/10/7.5 HP having discharge.

Pump motor MS coupling

L-190 spider.

Cover bolts & washers

CI impellar suitable for existing 7.5 HP centrifugal pump set.

CI Gland packing chaplla

SS Sleeve (Gland Sleeve)

Pump shaft with studs and nuts for pump body.

M & L for Construction of brick masonary valve pit chamber complete of size 900 mm X 900 mm X 900(internal dimension) mm with 3 mm thick sheet with m s angle iron frame of size 50x50x6mm with locking arrangement all including necessary excavation & earth work in any type of soil and two coats of anti corrosive paint over one coat of zinc chromate primer complete all as specified.

M & L for Earthing complete with galvanised steel earth plate electrode 60×60cm.× 6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less'than 1.5 metres below normal ground level, connected to galvanised iron strip 25×4mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion all as specified and directed .Note : On testing after completion if the desired earth resistance is not obtained the earthing will be redone at no extra cost

Supply & hanging in replacement stainless steel link chain of grade AISI 316/DIN/763 8 mm dia on existing chain pulley block mechanism of unit weight of chain not less than 1.11 Kg/RM complete all as specified.

Supply & hanging in replacement mild steel stranded rope 8 mm dia made out of 6(strands) X 7 (wire) + 1 Fibre core, duly tied with sewage pump of composite unit weight of rope not less than 0.237 Kg/RM complete all as specified.

M & L for replacement of weather proof flexible copper conductor cable of size 2.5 Sqmm, 3 core PVC/Rubber innersheathed, unarmoured suitable for submersible sewage pump complete all as specified.

Supply and fix in repair fully automatic electronic type star delta starter panel with voltmeter and ammeter complete of any capacity with Panel complete all as specified.

Drilling of trial bore 200 mm dia not exceeding 200 mtr depth below ground level through any kind of soil strata including hard stone / boulder by using suitable drilling method incl elect logging etc complete all as specified.

Supply and lowering 150mm, UPVC Casing pipe 6mm thick all as specified and directed by Engineer incharge incusive slotting pipe as per requirment of site

Material and labour for packing pea graval 3 to 5 mm of size as per IS of natural shape brought directly from river bed and packing around the casing pipe of UPVC / MS to entire depth upto ground level all as specified and as directed

Supply and fixing well cap suitable for 150 mm bore housing pipe made out of 6mm thick steel plate complete all as specified and directed

Development of tube well by air compressed of capacity upto 500 PSI till sand/ mud free clean water of portable quality is obtained complete as specified and directed

Development of tube well by over pumping 25% using suitable size diesel engine driven turbine pump complete all as specified.

Sanitary sealing of tube well with PCC (1:2:4) type B1 of suitable size using 20 mm graded aggregate complete all as specified.

Testing of water from approved Govt lab for potability by doing chemical analysis as per norms of WHO and submission of test reports complete all as specified.

Supply lowering jointing and testing MS black column pipe 3 mtr long heavy duty 50 mm bore, wall thickness 5.4 mm, both end flanged, ISI marked with heavy duty MS flanged not less than 16 mm screwed and welded in side and out side. The flange end making surface shall be made smooth including welding of 04 strip of 5.04 mm thick 25mm wide and 50 mm long covering pipe and flanged, both end flanged having 08 Nos predrilled hole not less then 16 mm including rubber gasket, nut bolts and washer, pipe should be duly painted with anti corrosive paint complete all as specified and directed by Engineer-in-Charge.

Banyan Engineers and Contractors

Sri Sankar Enterprises