Re drilling and installation and development of 1 one no of hdtw of size 350 mm x 200 mm nb with ms erw pipes up to a depth of 156 mtrs at madanpur krishnapur dtw center of wbsmicl under barasat ii block of north 24 pgs for fy 2025 26

Supply of hand pump spare parts i.s.i. mark and conforming to is/5500 part (1) ball bearing 20 bc opp (2) hexagonal bolt m-12 x1.75 x40 (3) hexagonal nut m-12 x 1.75 (4) hexagonal coupler m 12 x 1.75 (5) reducer cap (6) cylinder with brass line

Supply of ms erw pipes 350 nb thickness 9.5mm standard length of 10 m with single end flanged as per is 3589 1991 grade fe410

Development of road length approx. 2.30 km from innao tiniali to well no. kmc 01 via kumchai eps by providing and laying 80 mm thick interlocking concrete paver block grade m30 with preparation of base course by 100 mm gsb and 150 mm wbm including supply of all materials except cement.

Supply of 200 nos of nos percolating hose pipes of length 15 meter x 63 mm conforming to is 636 with male female gunmetal coupling (63x63mm) conforming to is 930 file no. 68/22x4/11, 2nd call

Drilling of 275 mtr (07 nos.) boreholes including supply and lowering of 200 mm dia. (ms erw black pipes is 3589 with tc, 6.5 mm thick) for stabilization of underground workings near unstable area zone-a, zone-d and zone-f of handidhua colliery.

For complete deion and other details, please refer to tender

For complete deion and other details, please refer to tender

Providing and laying 300mm dia ms pipe nominal bore conforming to is 3589 of 1991 having 4.85mm wall thickness with 0.75 tolerance with weight of 32 08kg per mtr and length of 6 mtr each for cross drainage embedded in teach by excavating earth and

Supply of galvalume sheets of thickness not less than 0.8mm conforming to is14246 for coverage in 32 mtr elevation above hot air duct and 52mtr elevation above walk way in unit i ii and iii boiler