Kerala Water Authority Tender

Providing Interconnection between newly laid line with existing pipe line using necessary specials for interconnection works including cost of all specials all labour charges etc;complete as per direction of departmental oficers.

Supply,installation and commissioning of a pre-engineered, pre-fabricated, factorybrmanufactured steel storage Water Tank having a capacity of 20000 L(1Nos.)thichness of 0.6 mm, in multiple layersbras required for the capacity and height of the tank and multiple-layered PE sheet/membrane for the innerbrcontainment liner.The Tank Shell / Body & the Liner material shall be manufactured in a facility certified andbrcompliant to ISO 9001 ? 2000 standards. The Tank shall be supplied with access points, penetrations for inlets,broutlets, drains and fittings, overflow andbrdrain, high and low water level indicators.All connections to the tanksbrshall be with flanged or threadedbrnozzles, placed to the KWA water mainsbrTANK ROOFbrThe roof of thebrtank shall be of corrugated Galvalume sheet steel and shall be domed, with heavy- dutybrHot-dip Galvanized trussbrframe for support, and capable of supporting 4-5 persons for maintenance andbrcleaning and tank shall have anbraccess hatch with cover, on the roof, for operation and Maintenance.brTANK COVERbrTank covers shall be ofbrapproved galvanized vermin proof construction. Roof ends shall be fitted withbrsuitable vermin-proofing tape orbrother material, to prevent ingress of dust and foreign objects. Coversbrshall be firmly fixed to the top edge of thebrtank with galvanized bolts and nuts.brLADDERSbrTanks shall be provided with Hot-dip Galvanized laddersbrinternally or externally. External roof supportsbrshall be of an appropriately designed Hot-dip galvanized steelbrconstruction. Tanks shall comply withbrrelevant spill level, air gap and overflow requirements relative to EffectivebrCapacity. All nuts and boltsbrused for the panels shall be a minimum of 12mm size and hot-dip galvanized/Casebrhardened. The tankbrshall have a circular angle fixed around the total circumference of the tanks, at the top, ofbrminimum 2 mmbrthickness.Tanks shall be properly flushed out with clean water prior to being brought intobrservice.brTANK DIMENSIONSbrThe dimensions of the Tank shall be of 4.85m in diameter and 5.70m inbrheightDESIGN LIFEbrThe tanks shall have a design life of 50 years.brTANK CONNECTIONSbrStandardbrdesign valve outlet connection : One No. 200mm CI Flanged valve.brii) Overflow connection including an internalbrapproved bell-mouth shaped bends to maximize the overflowbrcapacity. ? One no. 100 mm.briii) One (1) scourbrdrain outlet from the floor of the tank with isolation valve. One No. 100 mmbrTANK LINERSbrTank liners shallbrbe purpose-designed and manufactured and shall comply to AS/NZS 4020 (Appendix A)brof 2005 and ANSI/NSFbr61 ? 2008, Section 5 Certificates of compliance to above standards shall bebrfurnished by the manufacturer of thebrtanks.brTank liners shall: i) Be factory manufactured to one- piece construction, fabricated from multi-layer PEbrsheet, certified for potable drinking water, to ANSI NSF 61 and duly UV Stabilized.brii) Be of PE (polyethylene)brin multi-layer construction for strength, reinforced with woven scrim industrial fabric to prevent elongation andbrenhance tensile strength.The contact surface shall be of Metallocene layer.briii) The total liner material thickness shall be no less than 0.8 mm thickDESIGN LIFE The tanks shall have a design life of 50bryears.TANK CONNECTIONS Standard design valve outlet connection : One No. 200mm CI Flangedbrvalve.brii) Overflow connection including an internal approved bell-mouth shaped bends to maximize theoverflowbrcapacity. ? One no. 100 mm.briii) One (1) scour drain outlet from the floor of the tank with isolationbrvalve. One No. 100 mm TANK LINERS Tank liners shall be purpose-designed and manufactured and shallbrcomply to AS/NZS 4020 (Appendix A) of 2005 and ANSI/NSF 61 ? 2008, Section 5 Certificates of compliance tobrabove standards shall bebrfurnished by the manufacturer of the tanks.brTank liners shall:bri) Be factorybrmanufactured to one- piece construction, fabricated from multi-layer PE sheet, certified forbrpotable drinkingbrwater, to ANSI NSF 61 and duly UV Stabilized.brii) Be of PE (polyethylene) in multi-layer construction for strength,brreinforced with woven scrim industrialbrfabric to prevent elongation and enhance tensile strength.brThe contactbrsurface shall be of Metallocene layer.briii) The total liner material thickness shall be no less than 0.8 mm thickiv)brThe tensile strength shall not be less than 2266 N (warp) and 2495 N (weft) and heat sealing strengthbrof 2056brN v) All the liner welded lap joints shall be strengthened with Metallocene encapsulating tape welded overbrthebroverlap. vi) The Metallocene tape shall cover and protect the exposed material at the edges of the liner jointsbrto further prevent the ingress of water into the scrim. vii) Liners shall be positively and continuously attachedbrto the top outer edge of the circumference of the tank to prevent entry of water from the runoff from the roofbrstructure. viii) All liners on tanks over 2 m in height shall have a continuous intermediate liner support designedbrout of nylon (or other material)cord, around the circumference of the tank, at vertical intervalsbrcorresponding to the level of each ring. ix) The intermediate liner support cords shall be firmly secured to thebrsteel shell at each level, to preventbrstress on the liner welded joints, and thereby eliminate possibility ofbrfailure CORROSSION PROTECTIONbrThe tank structure shall have a secondary corrosion protection systembrusing sacrificial magnesium anodes. The number of anodes, their location around the tank and the mass of eachbranode shall be designed for anode replacement frequency of five years.The anodes shall be installedbrexternal to the tank and concrete apron with their location marked with a suitably label-Cost for Tank steel with 10years guaranteebrincludes shel l,Steel wall,steel domedbrroof,Zinc Alum steel',Cost for Poly ethylenebrinfinity liner ,Geo synthetic Fibre withfoodbrgrade plastics are used for inside coating andbrSupport Arrangements,Cost for Fabricatedbritems,attachments and accessories like steelbrladder,Cost of Fabricated nozzles,over flowbrnozzles and drain arrangements, Cost forbrHDG nut and bolts,Freight Charges, ErectionbrInstallation and commissioning of Tankbrcomponentsbr

Dismantling manually / by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer -in-Charge:Bituminous road

Supply of uPVC Pipe, IS 4985: 2000 , 10kg/cm2, 63mm Dia.

Engaging Fitter ( grade 1)

Engaging Assistant Fitter or 2nd class fitter

Excavating trenches of required width for pipes, cables, etc including excavation for sockets, and dressing of sides, ramming of bottoms, depth up to 1.5 m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20 cm in depth, including consolidating each deposited layer by ramming, watering, etc. and disposing of surplus excavated soil as directed, within a lead of 50 m : All kinds of soil (Ref. Item No. 2.10.1 of DSR)

Laying UPVC pipes of class 2 to class 6 and specials, lowering to the trenches already made, placing in position aligning the pipe line to the lines and levels and jointing the pipes and specials with solvent cement and testing the pipe line with water to the required test pressure (excluding cost of pipes and specials). 63 mm nominal outer dia pipes.

Fencing one side of trenches, 1.50 m height with two rows of 10 cm plastic caution tape in vertical casuarina pole (girth 15cm to 24cm) fixed at 2 m intervals. (Data Prepared based on PWD SDB - Item No.1009)

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including disposal of excavated earth, lead up to 50 m and lift up to 1.5 m, disposed earth to be levelled and neatly dressed.All kinds of soil

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size)

Cost of supplying PVC specials @ 5% of pipe cost

Providing and fixing gun metal gate valve with C.I. wheel of approved quality (screwed end) :50 mm nominal bore

Supplying 80 mm Gi casing pipe

supplying and fixing protection tube for protecting valve

Reinforced cement concrete work in walls (any thickness), including attached pilasters, buttresses, plinth and string courses, fillets, columns, pillars, piers, abutments, posts and struts etc. up tot floor five level excluding cost of centering, shuttering, finishing and reinforcement :1:1.5:3( 1 cement : 1.5 coarse sand : 3 graded stone aggregate 20 mm nominal size)

Centering and shuttering including strutting, etc. and removal of form for:

Steel reinforcement for R.C.C work including straightening, cutting, bending, placing in position and binding all complete upto plinth levelThermo - Mechanically Treated bars of grade Fe-500D or more

Providing 20mm (3/4 inch) house connection with 20mm (3/4 inch) water meter from existing PVC / HDPE mains up to 110 mm dia., up to a length of 5m using 25mm Indian Standard Class 6 uPVC pipe and uPVC / GM / Brass specials viz. brass ferrule, GM full way wheel valve, Elbow, MTA, FTA, couplers, PVC Service Saddle of suitable size etc. and connecting with the mains, testing the joints etc. complete including trenching and refilling in all kinds of soil up to a depth of 1.50m for main line tracing and trench of average cross section 0.3m x 0.75m for laying connection pipe and service pipe, fixing water meter, lighting, watching, providing caution boards, traffic control etc. complete including cost of materials, hire for tools, cost of consumables and labour charges but excluding cost of water meter and meter box and excluding charges for cutting the concrete / tarred / bituminous roads etc, and as per the direction of the departmental officers.

Providing 15mm PVC Tap in the water meter assembly for 15mm connection, using 20mm Indian Standard Class 6 uPVC pipes and specials including cost of materials, consumables, hire charges for tools and labour charges etc. complete and as per the direction of departmental officers.

Providing additional length of house connection pipe using 20mm Indian Standard Class 6 uPVC pipe and specials and testing the joints etc., by trenching and refilling in all kinds of soil with trench of average cross section 0.3m x 0.75m for laying of connection pipe and service pipe, lighting, watching, providing caution boards, traffic control etc., including cost of materials, hire for tools, cost of consumables and labour charges etc. complete, but excluding the cost of cutting of concrete / tarred / bituminous roads etc., and as per the directions of the department officers.

Charges for Application fees and connection fees for house connections (Mandatory fees details)

Mandatory fee for water supply connection having length above 30 m upto the meter point

Geotagging of the FHTC and preparing as laid drawings as per the direction of departmental officers.

Mace cost of pumps and line