NIT 1 Item 1

Removing of filter media and Gravels dumping out of the filter house manually near filter house up to 150 to 200 meter including soluble excavation by mechanical hydraulic excavator/ Manual earthwork for every addition lift 1.50 m and extra rate of quantities of work excavated is on under water and or liquid inlet pumping out water as required

Dismantling of RCC Tee, Header, RCC slabs and carried out site at filter bed of complete drainage system as per direction of plant in charge job includes cleaning of inner chamber of filter bed as cutting the base and desilting media from chamber to help of manual labour complete in all respect.

S/o 2 1/2" /80mm dia. 6 kg/cm2 HDPE pipe for air header line. Make:-ISI (PE-80, 2.5”)

80 mm dia end cap (Heavy Duty)

Fabrication & Supply of Rubber "O" Ring for fixing Header Tee 80 mm.

Fabrication & Supply of 80*80*80 MM size cement concrete tee as per sample

Supply & Fabrication of one side threaded J Hook as per sample. Heavy Duty

Fabrication & Supply of "U" type CI clamps for covering 80mm dia pipe. Heavy Duty.

Supply & Fabrication of one side threaded other side "U" type MS coupler with rubber.

Supply of 90 mm MS pipe make TATA/Jindal B class

Welding of flanges both side of air header pipe as per sample requirement.

Supply of hardware items like nut bolt washer, hardener etc. as per requirement. MS bend with packing sheets of CC TEE with P/f of 80 mm dia and required MS Pipe as per sample

Erection of complete system as air header pipe making group 80mm dia of header pipe (both sides) cleaning the group of RCC TEE for Fixing the rings, installation of TEE with proper alignment and levelling, welding of pipe with fitting & J Hook and clamp installation of MS pipe fitting in proper way as per filter bed design.

Provision for Pre-cast Slab as per filter bed design to cover the CC Tee & HDPE pipe with allied system

Supply of filter media sand which shall consist of hard durable grains. The filter media sand should be free from clay dust, root and other foreign impurities but it should not contain impurities. More than 5% by volume, it should contain less the 5% acid suitable matter in hydro-chloric acid in 24 hours. The specific gravity of the grains of sand should be greater than 2.50. The effective size of sand should not be less than 0.45mm. It should be uniformity co-efficient & not exceed 1.60. The filter media sand confirms to BIS8419 (Part A) 1977 as amended up to date.

Supply of gravels of filter beds of 4 sizes as per filter bed specification as per requirement of size.

Filling of gravels as per instruction of plant in charge with cleaning the gravels of different 4 sizes separation gravels by the water washing to remove the soil dust etc. each size collect in 4 group

Filling the media in bed taken from 150 Mtr away in the plastic beg by manually make proper way surfacing and maintain the level as per site in charge (job including cleaning & washing of FMS) After testing the bed again filling the media because level decrease in bed.

T & P Charges

Testing and Commissioning & Chemical Working of under drainage system at Filter Bed

AQUA GASEOUS CONTROLS (INDIA)