Detailed estimate for replacement of 02 no. Rubber Expansion joint installed/fitted with 914mm rising main at different RDs at LIS Raya.

Amount

Providing of 02 nos. single bellow type R.E joint of inner dia 900mm having integral flanged end made of abrasive resistant natural / synthetic rubber compound reinforced with adequate no. of plies of having cotton duet / nylon cord impregnated within rubber compound and further reinforced with metal ring embedded in carcass. The outer and inner surface of R.E joint shall have lining of neoprene based paint. It should be suitable for working pressure of 15 Kg/cm2, design pressure 20 Kg/cm2. R.E joint shall be suitable to absorb shock and vibration. Axial compression, axial elongation of 40 mm and lateral movement of 10 mm. The R.E joint should be complete with galvanized split retaining rings, control rods / nuts and etc. accessories. Diameter of R.E joint is as under. 1. Outer diameter (O.D)=1168mm 2. Pitch circle diameter (P.C.D)=1086mm 3. Internal diameter (I.D)=900mm 4. No. of bolts=32 nos. x 2 = 64 nos. 5. Bolt hole diameter=40 mm 6. Face to face length=430 mm Replacement of 02 no. Rubber Expansion joints 914 mm dia installed / fitted with the rising main at different RD’s. job involves dismantling of protection / safety cover by way of opening / cutting of rusted nuts and bolts and there after dismantling the nuts of limit rods by gas cutter, stretcher bolts plates, steel retaining rings and rusted nuts / bolts of rubber expansion joint flanges and complete dismantling of rubber expansion joints by installing mechanical jacks on both sides of rising main near the R.E joints. The job includes cleaning of all dismantling parts / accessories with cleaning chemical to remove rust and other foreign material. Pushing of rising main on both sides with the help of crane to create space for insertion of new R.E joint. Cutting of M.S pipe on one side with gas cutter to remove pipe for installation of new R.E joint and welding of M.S pipe from where it cut after preparing the ends of pipe by grinding and leveling with existing rising main if needed. Fitting of new rubber expansion joint by replacing the completely perished rubber washers of limit rods as per sample. Replacing the rusted / deformed nuts and bolts of flanges 40 mm dia, 175 mm long as per sample in place of old / deformed / damaged one. Strengthening of M.S flanges and top cover of R.E joint by welding at the required points. Fitting of R.E joint covers by p/f of new nuts / bolts. Complete painting of the RE Joint covers and flanges with red oxide primer and two coats of black anti-corrosive paint after cleaning of M.S flanges and top cover with wire brush and emery paper. Complete job includes cost of material, labour charges, painting charges, crane charges, to and fro carriage charges and charges for gas cutter, cost of gas, tools and tackles, nuts & bolts required for installation of R.E joint. Testing of R.E joint on full load at site. Complete job.

N B Engineering and Electric Works (BID ID -2216331)

Rishabh Electricals and Mechanical Works (BID ID -2216411)

M/S FASTTRACK ENGINEERS (BID ID -2216973)