Maintenance of Water Supply System Repairs Painting of MS Pipeline Rising Main to MBR and Sump Cleaning at Gogal Pumping Station

Clearing jungle including up rooting of rank vegetation grass bush wood trees and sapling of girth upto 30 cm. measured at a height of 1 m above ground level & removal of rubbish upto a distance of 50 mt. outside the periphery of the area cleared. (if however only grass is met with the area will be measured and paid for under item 4001).

Clearing grass and removal of rubbish upto a distance of 50 m outside the periphery of the area

Providing and laying three coat of anticorrosive and anti-toxic surface coating for MS pipeline. The paint shall be applied after removing the scales and rust over the pipe by wire brush. Paint shall be applied uniformly to achieve uniform coating of average DFT of 60 microns per coat with the brush. 2nd coat shall be applied over the 1st coat after 8 hrs. the process shall be repeated for the 3rd coat. DFT for the final coat shall be 35 microns . Final surface shall be uniform and shall have total thickness of about 150 microns . The rate is inclusive of material transportation up to the site of work including labour machinery as required etc. complete . All three coats shall be of distinctive colour as approved be Engineer-in- charge.

Removing of existing defective 200 mm C.I. Double Orifice type Air Valve.

Supplying at store or site of work including railway freight carting loading unloading stacking etc. C. I. Double orifice type air valve confirming to IS1 4845/2000 with inbuilt isolating valve smallwith SS spindle and CI protective cap .Low pressure large orifice chamber with vulcanite coated timber ball resting on moulded rubber seating and chamber having CI cowl protection.High pressure chamber shall have rubber coated timber ball as floathaving Float guides ;and LTB or SS orifice nipple The body seat ring shall be of LTB as per IS 318 LTB2 or of SS. All nuts /bolts shall be of carbon steel of SS. The flange shall be drilled and faced as per IS1538(part 4 &6) suitable to working pressure of 16 kg /cm2 TYPE P.N. 1.6 (ClassB); Dia in mm;200

Fixing C.I. Double orifice / Kinetic type air valve of following sizes with bronze ferrule at inlet screwed on isolating valve small orifice elastic ball resting valve small orifice elastic ball resting on small bronze orifice nipple and large orifice vulcanite ball resting on moulded seat ring inlet faced and drilled to BST "D"" suitable to working pressure of 10 kg /sq. cm.;Nominal diamter in mm.;200"

Cleaning of 1500 Cu.m. capacity water storage sump ( 32.00 x 15.50 x 4.4 mtr. ) at Gogal Pumping Station by using Jet Spray machine, dewatering, Scraping o wall and columns using disinfectants, bleaching powder etc. Removing of mud/silt, sludge, debries from the sump including transportation / disposal of mud/ silt /Sludge/debries away from the sump and flushing out all the unwanted material complete as directed by Eng ineer-in-Charge

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