Chennai Metropolitan Water Supply And Sewerage Board Tender

Highways road

Inside campus

Supplying and laying of 100mm D.I. pipes and specials including earthwork excavation for trenches in hard stiff clay, blackcotton, 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 10 m and initial lift of 2m carting the pipes from any of the Board’s Stores to the site of work lowering into the trenches, aligning, refilling the trenches with excavated soil, watering and ramming to consolidation, etc., complete at 1.50m deep.

Making rubber joint- 100 mm dia

Supplying,Conveying and fixing of DI specials

100 mm DI D/S 22.5 deg bend

100 mm DI D/S 45 deg bend

100 mm DI D/S 90 deg bend

100 mm dia DI MJ Collar

100mm Sluice valve

100mm Socket Tail piece

100mm Spigot Tail piece

Construction of Sluice valve chamber for the size 100 to 250 mm - For 100 mm dia Sluice valve

Barrication work along one side of the trench for laying the pipe line with casuarina post at 1.52m centre to centre (8 to10 cm dia. and 1.52m height) verticals, painting the vertical posts in different colours, tieing with coir rope, fixing danger flags, danger lights, reflectors including watching during night for 1 metre

Testing of DI pipes with hydraulic testing equipment by filling with water (including cost of water @ Rs. 60/KL) and testing to recommended pressure in convenient stretches and attending the bursts if any occurred during the test excluding the cost of pipes, including other incidental and operational charges etc. complete for the following diameters of pipes.- for 100mm dia

Connection work to existing water main including cutting existing pipe, fixing branches, collars, lead jointing excluding excavation, etc complete., at Head works - 100mm

Disposal of surplus earth

Electromagnetic Flow Meter conforming to ISO 17025 Standard 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 units of kiloliters and shall be accurate within 0.5% of Measured value, shall operate within a range of 0.3m/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 street 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 /Polyurethane/PTFE 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/Die cast Aluminium/Carbon Steel with Anticorrosive paint 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. Signal Converter shall be pulsed DC coil 84 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 and a frequency output of a maximum of 0-10 KHZ and a scaled pulse output. The microprocessor based signal converter shall have a self-diagnostic 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 and empty pipe zero return. The signal converter housing should be die-cast aluminium with glass window.100 mm dia

Supplying, conveying and fixing double air valve - 80mm

Construction of chamber for water meter.

Providing thrust block with CC 1:3:6 using 12-20mm Jelly ., ete, complete.