WBPHED/EE/BMD/NIeT-20 OF 2024-2025/2

Amount

Supply delivery of the following material :-

M.S. Plate as per IS 2062 ,size i) 96''x96''x35 mm and ii) 96''x48''x12 mm .

Nut Bolt MS

Rubber gasket

Making 800 mm x2nos and 700 mmx2 nos dia flange at workshop cutting from above supplied 35 mm thick MS plate in item no 1.1 including cutting machining charges using all tools and making 40 mm dia drilled hole 24 nos. as per IS in the PCD of each flange for making flanged joint as per direction.

800 & 700 mm dia 35 mm thick

Making 800x700mm reducer section at workshop after cutting and machining from above supplied MS plate 12 mm thick cutting the plates to exact size & shape by gas cutting device and/or by adopting any other approved type of mechanical means, bending the same in true curvature by template and rolling machine of approved design including proper marking, levelling jointsand bending with the help of hydraulic bending machine and finishing properly as per direction.

Making parmanent joint of reducer 800x700 mm with double flange using electric arc welding as per relevant IS specification & using standard electrodes including edge preparation at workshop as per direction.

Dewatering the valve chamber of 800 mm dia valve engaging labour and lowering of 5 HP dewatering pump set and electrical power line connection.

Dismantling blank flange 800 mm at the end of common header and 400 mm dia butterfly valve one no by unscrewing nut bolt at the pump house for draining out of water from pipe.

Hiring charge of earth cutting machine like JCB for dismantling top portion of Valve chmber size 2x2x3m and cutting trench (size 20mx3x2.5m ) to open 800 mm dia Gate valve and 800 mm dia pipe line as per directionof EIC.

Labor charges for dismatling bottom part of RCC wall and PCC grouting around valve and unscrewing nut bolt ,cutting pipe etc for lifting valve and tail piece.This includes hiring charges of vibrator machine, Gas cutting torch including gas cylinder and other necessary tools.

Carrying charges 700 mm dia Gate valve from head work site of Kalyaneswari w/s scheme and 2 nos 800x700mm reducer with double flange by hiring a truck from workshop at Asansole including loading unloading charges using hydra at both end as per direction.

Fitting fixing charges of double flange reducer with valve at both side with supplied nut bolt 48 nos and ruber gasket in item no 1.2 & 1.3 to make leakproof joint as per direction.

Hiring charges of Hydra for lowering 800 mm dia valve with reducer at proper place in the pipe line and holding properly to be fitted with tail piece in one end.and 2 nos 800 mm dia short piece for inserting in the pipe line for welding work.

Fixing valve with nut and bolt and gasket with tail piece at one end of pipe .Tightening nut bolt properly.

Insetting 2 nos 800 mm dia short piece in the pipe line and joining with Electric Arc Welding both inner and outer peripheri at 3 section as per relevant IS specification & using standard electrodes including edge preparation to make leakproof joint by expart plumber as per direction.

Back filling of cutting trench with shifted soil using JCB ramming dressing top portion of pipe line as per direction.

Add: 18% GST

Add: 1% Cess

Premnath Mitra (BID ID -6291922)

M/S. SWAPAN BANERJEE (BID ID -6291915)