SPECIAL REPAIR / REPLACEMENT OF RUSTED COLUMN PIPES, REDEVELOPEMENT OF BOREWELLS AND OTHER CONNECTED WORK AT ZONE A UNDER GE (ARMY) AHMEDABAD

M&L for disconnecting the electric and water pipe connections and taking out the column pipe of any dia from the bore well upto a depth of 140 metres including submersible cable, submersible pump and motor of any capacity and size in a controlled manner without damage to casing, cable or column pipe for carrying out the necessary repair work and re-lowering, re-align, re-couple and re-install the pumpset motor alongwith column pipe, submersible cable, SWR rope,coneecting back electric and water pipe connection etc complete all as specified and directed. Note :- (i) Old unserviceable submersible motor retrieved from bore well deposit in AGE E/M store yard. (ii) Necessary T & P i.e Chain pully block / tripods / Hiring Crane Machine etc will be in the scope of contractor / own arrangement of the contractor. (iii) New Rope, submersible cable, submersible pump shall be measured and paid for separately under respective item of this schedule.

M & L for lowering of Down-hole colour video inspection camera,with integral LED illumination and camera cable rated for the full working depth, water-proof (min. IP68) for survey of borewell. Camera will lowered centrally through the casing pipe and survey to visually record the condition of bore well (i.e.corrosion, cracks, deformation, joint condition) of casing pipe, obstructions, silting/collapse and static water level. A recorded video (soft copy) and a written inspection report shall be furnished and submitted to the AGE E/M office complete all as specified and directed.

Repair of cracks/damage identified in the M.S casing pipe of the bore well of any dia (as located and recorded during down-hole CCTV survey under Item No.1) by supply and providing, cutting to required length and longitudinally slitting a UPVC pipe of matching/approved diameter and class 3/4, and lowering and fixing the same centrally over the exact location of the crack with the help of a purpose-built pipe lowering-cum-expanding machine/tool, so that the UPVC sleeve/patch grips and firmly covers the cracked/damaged portion of the casing pipe from inside over its full circumference, including confirmation of correct placement by pre-and post-repair down-hole CCTV survey, and furnishing of video record (soft copy) and written report to the AGE (E/M) office complete all as specified and directed.

M & L for lowering of sounding tape to measure initial depth of silt level and setup a tripod rig / Machanical winch / Hiring to Crane and lowering the Boogie (Bailer) assembly and cleaning and desilting of borewell by Boogie method, including lifting of accumalated sand, clay, slush, silt, rock cutting, drill cuttings and foreign matter from depth of bore well and achieving full possible bottom and safe disposal of removed silt / slurry / waste water clear of the work area complete all as specified and directed.

Supply, fabrication and installation of M.S. Column pipe of size 4" (100 mm Nominal Bore), Mild Steel (MS), Electric Resistance welded (ERW) pipe conforming to IS:1239 (Part-1) class C ( Heavy duty) 3 Mtr long, complete with heavy-duty M.S. flanges of 16mm thick, 215mm outer dia welded at every joint with column pipe seamless and bolted with 06 Nos M.S./G.I. nut-bolts M16 x 60mm wth high-tensile grade spring washer and rubber gasket to form a leak-proof joint capable of carrying the full column weight and pump thrust load and welded 100 mm x 40 mm x 5 mm thick flat iron strip between flang and MS pipe to increase load bearing capacity of the column pipe including making suitable size of cable slot in flange for protection copper flat cable upto 16 sqmm 3 core complete all as specified and directed.

Fabricating, supplying, and fixing heavy-duty split-type Mild Steel (MS) flat iron borewell head clamp assembly, suspend and hold a 100 mm (4") Nominal Bore MS column pipe to a depth of 150 metres along with a 4-inch diameter submersible pump set, resting securely on top of the borewell casing pipe.​The clamp assembly shall be fabricated from high-yield MS flat minimum section size of 75 mm (width) and 12 mm (thickness). The clamp shall be precision hot-bent/machined into two symmetrical halves to fit snugly under the socket/flange of the 100 mm column pipe, complete with 4 Nos. pre-drilled bolt holes including clamped firmly using 4 Nos. High-Tensile M16 / M20 Hexagonal Bolts of requisite length, and 4 Nos. matching heavy-duty Hex Nuts and 8 Nos. thick spring/flat washers and painted with two coats of red-oxide zinc-chromate primer followed by two coats of heavy-duty anti-corrosive epoxy paint complete all as specified and directed

M&L for carry out Yield test for the borewell by continously pumping for 12 hours to determine safe yield and testing of water from AMC/Govt approved test Lab/PHED state deptt for its portability and other parameter as desired for safe drinking of water complete all as specified and directed. (Note : Cost/Charges of water test report from AMC/Govt approved test Lab/PHED state deptt shall be deemed to be included in the quoted unit rate of this item)

Supply, installation, testing, and commissioning of heavy-duty Grey Cast Iron Ball Type Foot Valve of size 150mm, complete with integral cast iron strainer, flanged end connection conforming upto PN 6 working pressure ratings, floating nitrile rubber coated reinforced ball mechanism, including all required gaskets, high-tensile fasteners, nut, bolt & washer including T&P and labor for structural alignments for complete suction-end pump fitment complete all as specified and directed.

Supply, laying, jointing, alignment, welding, testing, and commissioning of 150 mm Nominal Bore (NB) Mild Steel (MS) Electric Resistance Welded (ERW) pipes Heavy duty - Class C including supply and installation of all required MS specials and fittings (bends, equal/unequal tees, reducers), MS slip-on flanges, 3 mm thick compressed fiber gaskets, High Tensile fasteners, complete edge preparation, multi-pass field welding with approved electrodes, surface preparation, and applying anti-corrosive painting over the surface of MS pipe, and connected with existing suction / discharge side of pump properly complete in all respects and as specified and directed.

Supplying, lowering, erecting, testing, and commissioning of heavy-duty water-filled 3-phase submersible pump set of having a 41 HP (30 kW) motor power rating operating on 415V (±10%), 3-Phase, 50 Hz , with 10 stage pump suitable for installation in a 300 mm (12 inch) nominal diameter borewell casing, designed to deliver a water discharge of 550 LPM to 1330 LPM against a total dynamic head operating head range 140 mtr to 210 mtr including connecting with 3 core copper flat submersible cable with waterproof resin cable jointing kits complete in all respects as specified and directed. Make : KSB (PUMP Model: UPHA 293/10 coupled with Motor Model: HBCN 413) or equivalent model in Kirloskar / CRI / Texmo