Chennai Metropolitan Water Supply And Sewerage Board Tender

Supplyig, Laying and jointing of D.I. pipes(Class K7) as per IS 8329/2000 including earthwork excavation for trenches in hard stiff clay, stiff black cotton, hard red earth, shales, murams, gravel, stoney earth and earth mixed with small size boulders and hard gravelly soil, depositing the earth on banks with initial lead of 10m and lift 2.00m carting of pipes from any of the Board’s stores to the site of work, lowering into trenches and aligning, etc., complete.

200mm dia 1.50m depth

Providing Iron Barricading of size 2.50 m width and 1.75 m height using 40x40x4 mm angle for outer frame supports, 25 x 25 x 3 mm angle for inner frame supports and 20 gauge thickness MS sheet for name board (as per drawing) including cutting, welding, fabrication charges and one coat of primer and 2 coats of enamel paint of approved quality, writing "METRO WATER" & work detail/ caution sign, providing necessary interlocking arrangements with adjoining units, fixing danger flags, danger lights, reflectors, fixing stickers etc, including watching during night and placing the barricading units as directed at the sites.

Supplying, Conveying and fixing of the following DI Specials as per IS 9523/2000

200mm dia M.J.Collar

200mm dia 90 deg bend

200mm dia 45 deg bend

200mm dia 22 1/2 deg bend

200mm dia 11.25 deg bend

Cutting D.I. mains 200mm dia

Hire charges for diesel pumpset of 5HP with fuel and operator charges including transportation

Testing of D.I.pipes with hydrulic testing equipment by fillling with water and testing to recommended pressure in convenient sretches and attending the bursts if any occurred during the test, excluding the cost of pipes, including other incidental and operational charges,etc., complete. 200mm dia

Construction of chamber for 100mm to 250mm dia. sluice valve including providing and fixing FRC cover and frame of size 60 x 60cm for size 1.35 x 1.2 x 1.55 m (sluice and meter chamber)

Providing thrust blocks with Plain Cement Concrete in 1:3:6 with 40mm HBG for the CI pumping main including the cost of shuttering, compaction, curing etc. complete.

200mm dia 90 deg bend

200mm dia 45 deg bend

200mm dia 22 1/2 deg bend

Electromagnetic Flow Meter shall be a velocity sensing Electromagnetic type, microprocessor based signal converter, sealed housing, flanged tube meter for 1.0 Mpa working pressure, manufactured to highest standard available for mag-meters, equipped with minimum six digit digital totalizers, reading in different units (Kiloliters / Cubic meter) and shall be accurate within 0.5% of Measured value, shall operate within a range of 0.3 m/sec to 4 m/sec and be constructed as follows: Meter tube (Sensor) shall be fabricated from stainless steel tube and use class PN10 flat face carbon steel flanges in accordance with IS 1538. These flanges shall be welded to the flow tube. The internal and external of the meter tube shall be blasted to near white and lined with hard rubber preferably by SBR or EPDM. Meter tube shall have a constant nominal inside diameter offering no obstruction to the flow. The accuracy should be inclusive of linearity, hysteresis, repeatability, temperature and pressure effects. Coil Housing shall be fabricated from stainless steel (SS304) for corrosion resistance and welded to the tube providing a completely sealed environment for all coils, electrode connections and wiring harness capable of submerged or buried operation with IP68 Protection. Signal Converter shall be pulsed DC coil excitation type with auto zeroing. The signal converter shall be remotely mounted away from the meter. The converter shall indicate direction of flow and provide a flow rate indication and a total of flow volume for both forward and reverse directions. The converter shall provide an isolated 4-20 mA output into minimum 500-ohm load S.O.R.2020-21 ( S.No.12, page no:161) and a frequency output of a maximum of 0-10 KHZ and a scaled pulse output, Communication interface is RS485, HART output. The microprocessor based signal converter shall have a selfdiagnostic test mode and a backlit display that continuously displays “Rate of Flow” and “Total Volume”. Converter shall be supplied with a programmable low flow drop out, higher flow and empty pipe zero return. The signal converter housing should be die-cast aluminum with glass window. The converter cum transmitter should be fully programmable form the front facia. The programming should be user friendly, self-prompting menu driven. Flow meter test calibration certificate from FCRI, flow test lab / NABL accredited lab to be furnished

Shifting of House Sewer Service Connection

Supply and Laying P.V.C. straight pipes and specials including carting, jointing, excavation and refilling

Shifting of House Water Service Connection

Supplying and laying of MDPE (PE80) Blue pipe (IS:4427) with necessary specials including earth work excavation laying jointing testing, refilling the trenches and disposal of surplus earth etc.complete.

Cement concrete 1:2:4 using Crushed stone sand (M sand) and 20mm gauge hard broken stone jelly for plain concrete works including laying ramming curing, etc., complete. (For SWD)

Supply, Conveying and fixing pipes & specials like “DI.Tee” Branches, Bends and tapers as per IS 9523/2000 including earthwork excavation

Inter Connection with Pumpset

150/100 DI DF Tapper

150mm dia D/F pipe (5 m length)

150mm dia D/F DI 90 deg bend

Non return valve 150mm dia

150mm dia sluice valve

150/200mm D/F taper

200mm dia flange spigot Di pipe

Subway portion

Ductile Iron Pipes as per IS 8329/2000 (K-9-Flanged Pipes-5M Length) PN 10

200mm dia D/F pipe

200mm dia D/F pipe 90 degree duckfoot bend

200mm dia flange spigot DI pipe

Jointing the C.I. Double flanged pipes and specials with rubber insertion to the required specifications with M.S. bolts and nuts, complete and testing the pipes to the required pressure with water (including cost of jointing materials) and labour cost etc. complete

150mm dia specials

200mm dia specials

Bill.No.2 : Submersible Pumpset

Supply, delivery, erection, testing and commissioning of non-clog submersible pumpset 1450 RPM with 20lps and 20m head driven by 3 ph, 415V- AC, 50Hz, electrical motor with suitable weather proof cable (copper) of total length of 10m, pedestal coupling, M.S (GLVD) lifting chain of length 10m, necessary level controlling probes with sufficient length of armoured copper LTUG cable to connect the probe from the junction box to the control panel, fasteners including laying of pump cable underground with suitable conduit and clamping on walls/trays and incidental civil works etc. complete.