REPAIR/ REPLACEMENT OF UNSERVICEABLE CI/ GI PIPE LINES, VALVES, VALVE CHAMBERS AND ALLIED WORKS AND CLEANING OF OH RESERVOIR/ SUMP/ STATIC TANKS OF WATER SUPPLY AND MAINTENANCE TO FILTERS AT ARAKKONAM

Amount

Excavation in trenches not exc 1.5m wide and not exc 1.5m deep getting out in soft /loose soil for taking up /laying CI /DI/ GI pipe complete all as specified and as directed by Engr-in-charge.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cms for soft/loose soil complete all as specified and as directed by Engr-in-charge.

Removing surplus excavated soil to a distance not exc 50m and depositing where directed at a level not exc 1.5m above from the starting point complete all as specified and as directed by Engr-in-charge.

Material and labour for opening the top of the sluice valve of the following sizes carefully and taking out the gate including spindle and checknuts, scrapping /cleaning, replacing, regrinding of gate of sluice valve and spindle, refixing the spindle, gate check nut and top of sluice valve including repacking stuffing box of sluice valve spindle by replacement of gland packing rope of suitable size and reassembling including replacement of rubber gasket, bolts, nuts etc., and making the sluice valve serviceable complete all as specified and as directed by Engr-in-charge. Note: Rate quoted deemed to include M&L cost for repair to sluice valve.

100mm dia

150mm dia

200mm dia

300mm dia

Taking down existing unserviceable sluice valve from the existing pipe line and supply and fix for sluice valve CI body ISI marked class PN 1.6 heavy duty flanged ends cast iron wheel with SS spindle (ISI marked) conforming to IS:14786-2000, short body including nuts, bolts, washers and gasket complete all as specified and as directed by Engr-in-charge. Note: Quoted rate deemed to include making good the damaged valve chamber.

100mm dia

150mm dia

200mm dia

300mm dia

Material and labour for cutting bituminous road /PCC floor /plinth protection for laying pipe not exc wide 1.5m and 1.5m depth including refiling with excavated material and watering well ramming /compacting including earth work and making good with PCC complete all as specified and as directed by Engr-in-charge. Note: PCC shall be measured and paid separately.

Material and labour for PCC 1:2:4 type B-1 (Using 20mm graded stone aggregate) as in filling and making good distrubed surface complete all as specified and as directed by Engr-in-charge.

Taking down the existing unserviceable gate valve of following sizes and supply and fix new gun metal globe valve with iron wheel, screwed both ends for iron pipes complete all as specified and as directed by Engr-in-charge.

15mm bore

20mm bore

25mm bore

50mm bore

80mm bore

Taking up or down steel tubing of following sizes from roof/ ceiling /wall /trenches complete all as specified and as directed by Engr-in-charge. Note: Excavation and earth work shall be measured and paid separately under relevant items.

15mm bore of pipe

20mm bore of pipe

25mm bore of pipe

40mm bore of pipe

50mm bore of pipe

80mm bore of pipe

Supply and lay tubing, medium grade galvanised with all fittings specials such as bends, elbows, tees, short pieces connection, back nuts, diminishing pieces, caps, plugs and unions etc., laid in trenches of following sizes complete all as specified and as directed by Engr-in-charge. Note: Excavation and earth work will be measured and paid seperately under relevant items of schedule.

15mm bore of pipe

20mm bore of pipe

25mm bore of pipe

40mm bore of pipe

50mm bore of pipe

80mm bore of pipe

Supply and lay tubing, medium grade galvanised with all fittings such as bends, elbows, tees, short pieces connection, back nuts, diminishing pieces, caps, plugs and unions etc., laid in walls, ceiling and laid in floor of following sizes complete all as specified and as directed by Engr-in-charge. Note: Quoted Rate includes supply and fixing suitable MS clamps with painting and wooden plug along with screws in specified intervals.

15mm bore of pipe

20mm bore of pipe

25mm bore of pipe

40mm bore of pipe

50mm bore of pipe

80mm bore of pipe

Refixing steel tubings the serviceable portion of following size pipes retrived vide item No.09 here-in-before and fixed and connection in new or old position on wall /ceiling /floor etc., complete all as specified and as directed by Engr-in-charge.

15mm bore of pipe

20mm bore of pipe

25mm bore of pipe

50mm bore of pipe

80mm bore of pipe

Taking up cast iron water mains (including all fittings) with spigot and socket ends and lead joints for size 100mm dia bore including burning out joints and recovering lead complete all as specified and as directed by Engr-in-charge.

Supply and lay in trenches DI pipe K-7 with spigot ends, centrifugally cast suitable for rubber/ tyton joint for 100mm bore size complete all as specified and as directed by Engr-in-charge. Note: Earth work/ excavation, tyton joint, rubber joint etc., shall be measured under releavent items.

Material and labour for bends (any radius and angle) tappers any type (straight, bend, increasing, decreasing or double socket) Tee, pieces, single branch, 'Y' junction, double branch, cross (all socket or socket spigot) collars, caps, caps and plugs suitable for DI pipe upto 150mm bore complete all as specified and as directed by Engr-in-charge.

Taking out the unserviceable lead joints including spun yarn and Material and labour for run lead joint for spigot and socket pipes and fittings of the following sizes complete all as specified and as directed by Engr-in-charge.

80mm dia bore

100mm dia bore

150mm dia bore

200mm dia bore

300mm dia bore

Material and labour for taking down and removing detoriated valve chamber cover, including fabricate and fix new valve chamber cover for chamber size 1.2x1.2m made out of 3mm thick MS sheet over MS frame work made of 40x40x5mm angle iron and duly hinged with frame including grouting/ fixing into wall of chamber and painting the entire steel work with two coats of synthetic enamel paint over a coat of red oxide and provision of locking arrangement, lifting hook etc., complete all as specified and as directed by Engr-in-charge.

All as per item No.17 here-in-before but valve chamber cover for chamber size 0.90x0.90m.

All as per item No.17 here-in-before but valve chamber cover for chamber size 0.75x0.75m.

Material and labour for repair to plaster of valve chambers by preparation of bricks surface including rendering 1:4, 10mm thick of fair face of brick work including removing old damaged plaster complete all as specified and as directed by Engr-in-charge.

Material and labour for brick masonry valve chamber of size 1.2x1.2x0.9m (internal size) by providing PCC 1:2:4 type B-2 foundation 100mm thick and brick work in CM 1:4 plastering 10mm thick in CM 1:4 internal surfaces and external surfaces completely and at external surfaces upto 150mm below GL, 75mm thick PCC 1:2:4 type B-2 as in coping for valve chamber cover made up of 40x40x5mm thick angle iron frame and 3mm thick MS sheet cover complete with locking arrangements and handle including painting all steel surfaces with two coats of synthetic enamel paint over a coat of red oxide primer including dismantling and demolition of existing damaged valve chamber and removing debris away from the premises including necessary earth work complete all as specified and as directed by Engr-in-charge.

All as per item No.21 here-in-before but valve chamber of size 0.75x0.75x0.75m (internal size).

Material and labour for rubber gasket tyton joint for the following sizes including taking out old unserviceable damaged joint complete all as specified and as directed by Engr-in-charge.

100mm dia bore

150mm dia bore

200mm dia bore

300mm dia bore

Material and labour for cleaning the underground sumps of following capacities by de-watering the sump using submersible pumps, removing the silt/ sludge deposited at bottom, walls complete, cleaning the sump internally using high pressure water jet upto 120 bar pressure then by vaccum cleaning followed by anti-bacterial (non toxic) spray and UV radiation for suspended bacteria killing complete all as specified and as directed by Engr-in-charge.

Underground sump of 1021500 Ltrs capacity (MRS) including one coat of white wash to the internal surface and external surface of the sump.

Underground sump of capacity 1 Lakh Ltrs capacity (Thiruparkadal and thirumalpur) including one coat of white wash to the internal surface and external surface of the sump.

Static water tank of capacity 1 lakh ltrs including one coat of white wash to the internal surface of the tank and remove green vegitatation around the tank upto 1m radius including painting with two coats of synthetic enamel paint to MS grill guard of static tank over a coat of red oxide complete all as specified and as directed by Engr-in-charge. Location: Near Sub station 'C', NORA Sub station, WTS, LRMR (BSF), ATH, Rajalika, Magzine area - 2 Nos, ATC, P8I Maint Hanger, 4 PEB Hangar - 2 Nos and NAD area - 02 Nos.

Material and labour for cleaning the over head reservoirs of 454000 ltrs capacity 24.3m height at NORA by de-watering the tank, removing the silt/ sludge deposited at bottom, walls complete, cleaning the sump internally using high pressure water jets upto 120 bar pressure then by vaccum cleaning followed by anti-bacterial (non toxic) spray and UV radiation for suspended bacteria killing complete all as specified and as directed by Engr-in-charge.

All as per item No.25 here-in-before but capacity of 454000 ltrs 18.3m height capacity at MT area.

All as per item No.25 here-in-before but capacity of 227000 ltrs capacity at MRS and sailors area.

Taking down the inspection cover from pressure filtration plant and taking out existing filter media (Pebbles /sand) of various sizes from the pressure feed filtration plant (Made up of MS) and removal to a distance not exc 20m and dopositing where directed complete all as specified and as directed by Engr-in-charge. Note: The rate quoted by the tenderer shall be deemed to include for segregating the filter media (Pebbles/ sand) of various size for measurement purposes.

Refilling the serviceable media (i.e., pebbles) of various sizes obtained form item No.28 here-in-before in the pressure filtration plant after cleaning with acid and pure water etc., complete all as specified and as directed by Engr-in-charge.

Supply and fill granite pebbles of size 1 1/2'' to 1'' as filter media in the pressure filtration plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Supply and fill granite pebbles of size 3/4'' to 1/2'' as filter media in the pressure filtration plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Supply and fill granite pebbles of size 1/2'' to 1/4'' as filter media in the pressure filtration plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Supply and fill gravel of size 1/4'' to 1/10'' as filter media in the pressure filtration plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Supply and fill coarse sand of size 8x16m as filter media in the pressure filtration plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Supply and fill fine sand of size 16x32m as filter media in the pressure filter plant complete all as specified and as directed by Engr-in-charge. Notes: (i) The source of pebbles, coarse and fine aggregate shall be from river bed and as approved by GE. (ii) Grading and size of filter media shall be tested in the approved laboratory and test results shall be submitted and the rate quoated shall be deemed to include the above provision.

Material and labour for preparation of old painted internal steel surfaces of filtration plant of size 2600mm dia and 2300mm length and applying two coats of anti-corrosive bituminous epoxy paint including complete removal of existing treatment by scrapping the surfaces with wire brush, de-scaling etc., complete all as specified and as directed by Engr-in-charge.

Material and labour for preparation of old painted external steel surfaces of filtration plant of size 2600mm dia and 2300mm length and applying a coat of synthetic enamel paint as per the existing colour and scheme including scrapping out of old fadded paint and writing the plant capacity, SM/ MES.No, etc., complete all as specified and as directed by Engr-in-charge.

Taking down the existing corroded/ damaged MS pipe of size 150mm top and bottom header (inlet and outlet) and laterals by gas/ electric welding cutting from pressure filtration plant of size 2600mm dia and 2300mm length maximum operating pressure 3.5kg/cm2 and supply and fix 150mm dia MS Pipe 3m long medium grade 6mm thick duly closed at one end with MS plate 6mm thick and including provision of holes of suitable size for fixing 50mm bore socket for branch pipe 22 Nos including welding of socket to main pipe including provision of specials replacement of branch connection of tee, elbow, bend, flanges, bolts, nuts with washers and gasket etc., complete all as specified and as directed by Engr-in-charge. Notes: (i) The work shall be carried out inside the filtration plant and rate quoted shall deemed to include for necessary gas cutting and welding etc., (ii) MS branch pipe 50mm dia one end threaded shall be measured and paid under separately.

Supply and fix for 50mm dia MS pipe medium grade 600mm long in pressure filteration plant of size 2600mm dia and 2300mm length, duly perforated with threaded one end inserted to sockets and closed the other end with MS plate 4mm thick etc., complete all as specified and as directed by Engr-in-charge. Note: The rate quoted shall be deemed to include for making holes of 6mm dia as perforation on 50mm dia MS pipe and necessary gas cutting, weldings, etc., and the welding work shall be carried out inside the filtration plant.

Material and labour for taking down existing corroded MS stair case from OHT and replace with new MS stair case with MS railing complete fabricated from structural steel angle not less than 75x75x6mm and structural steel plate not less than 6mm including nuts, bolts, washers, welding, bending cold or hot drilling holes for bolts in any shape or size as indicated or directed and inclusive of two coats of anti corrosive paint over a coat of red oxide primer including preparing the surface and necessary civil works, PCC required for fixing staircase complete all as specified and as directed by Engr-in-charge.

Material and labour for taking down existing damaged RCC cover from UG sump and replace with new precast RCC 1:2:4 type B-1 (Using 20mm graded stone aggregate) as in cover slab for water sump set in CM 1:6 complete all as specified and as directed by Engr-in-charge.

Supply and fixing for TMT bar not less than 10mm dia and over, cut to length, bent to shape require, including cranking, bending spirally for hooping for slab and including binding with MS wire not less than 0.9mm dia or securing with clips complete all as specified and as directed by Engr-in-charge.

Material and labour for taking down existing corroded MS staircase from sump and replace with new MS staircase with MS railing complete fabricated from structural steel angle not less than 75x75x6mm and structural steel plate not less than 6mm including nuts, bolts, washers, welding, bending cold or hot drilling holes for bolts in any shape or size as indicated or directed and inclusive of two coats of anti corrosive paint over a coat of red oxide primer including preparing the surface and necessary civil works, PCC required for fixing staircase complete all as specified and as directed by Engr-in-charge.

Material and labour for preparation of old surfaces and applying two coats of weather proof exterior grade acrylic emulsion paint of tint as per existing pattern over a coat of primer on wall of RCC OHTs of upto 25m height including necessary scafolding and safety measures, staging etc., complete all as specified and as directed by Engr-in-charge.

Material and labour for preparation of old surfaces and applying two coats of weather proof exterior grade acrylic emulsion paint of tint as per existing patern over a coat of primer on wall of RCC OHTs of upto 19m height including necessary scafolding and safety measures, staging etc., complete all as specified and as directed by Engr-in-charge.

m/s SRI VALLI ENTERPRISES

SREE BALAJI ENTERPRISES

Raju Builders

RD ENTERPRISES

D.KUMAR

RK CONSTRUCTION

N SRINIVASAN