Supply and fixing of DI pipeline carrying Bridge work at Nanmangalam main pumping line near keelkattalai in ward no.22

Supply and delivery of submersible centrifugal sewage non-clog pumps, vertical spindle type pump , wear resistancewith submersible motor for the various duty conditions. Pump shall be capable of handling min 100 mm solid size withsewage specific gravity of up to 1.05. Pump shall be of robust construction, Liquid passages shall be finished smoothand designed as to allow free passage to solids. Pump Impeller should be of Non-clog semi open type , single vane /multi vane preferably contra bloc or vortex impeller design. Double mechanical seal with silicon carbide faces shoulde provided to protect the motor from ingress of sewage along the shaft. The critical speed of the rotor shall be atleast 30% above the operating speed. Pumps should have double bearings between the pump & motor. The bearingslife shall be minimum 100,000 hrs of operation with greased for life. Pump should be provided with automatic couplingdevice including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitatelifting and lowering into guide rails for easy aintenance. Pump shall be provided with a stainless steel lifting chainconforming to BS 970 Gr 304. Pump speed shall be of 9600 rpm for high duty pumps and 960/1450 rpm for low dutypumpsets. Casing and impeller should be of CI Gr. FG 260:IS210 more preferably with hardened mpeller.Shaft shouldbe of stainless steel AISI 410. All the fasteners and bolts shall be of AISI 410.The submersible motor shall be operatedwith 3ph, 415 V(+or– 10%), 50Hz(+or-5 %) dry induction type. Motor shall be capable of giving rated output withoutreduction in the expected life span when operated continuously. The rotating assembly shall be dynamically balancedas per standards. The starting current of the motor shall not exceed 200% of rated full load current for Star / Delta orATS starting under any circumstances .The motor shall be suitable for full voltage star delta / ATS starting. The lockedrotor current of the motor shall not exceed 600% of full load current unless otherwise specified. Motor shall be designed to withstand 120% of rated speed for two minutes without any mechanical damage, in either direction of rotation. The motor vibration shall be within the limit specified in applicable standards . Motor should be of IE2, explosion proof compatible for VFD operation together with star-Delta /ATS starter, protection against increase in stator winding temperature (15 deg Celsius), bearing temperature, leakage in the stator housing and terminal box shallbe provided and to be suitably interlocked with the control panel for tripping the pump in case of increase in temperature beyond set limit. Insulation class shall be of “Class H” and degree of protection shall be of IP 68 as per IS4691. Motor shall be suitable for continuous operation in fully submerged or partially submerged condition.The pumpset shall be supplied with power cable of PVC insulated and PVC sheathed, copper, flexible, round type with required conductor size and number of cores as per starting method and of specified length for continuous use under water and air. The control cable of PVC insulated, PVC sheathed, flexible for stator winding temperaturesensor 3core x 1.5 sq.mm copper conductor and for bimetallic switches 2core x 1.5 sqmm copper conductor shall beprovided. Motor shall be supplied with 10m of round submersible copper cable of suitable size. The non clogsubmersible pumpset shall be provided with suitable starter control panel having all protections as mentioned above.(upto 5 HP - DOL Starter, above 5 HP to 25 HP -Star Delta Panel and beyond 25 HP shall be ATS)

10HP Discharge 20 to 100 M3/hour Head 10m to 15m

Labour charges for the erection of submersible pumpsetin borewell/openwell including fixing and jointingsubmersible cable with proper clamps upto the starter torequired depth and also fixing of riser pipes to therequired depth valves erection clamps, pressure gaugesupto the exterior wall of pump room and erection ofpanel board consisting of TPICN switches starter,Voltmeter, Ammeter, three pilot (indicating) lampscapacitor single phasing preventor, water level guard andlaying and jointing the cables and twin earthing as per IErules etc., complete and testing the pumpset and trail run for 10 days

Earth work excavation and depositing on bank initial lead of 1.00mand lift of 2m in narrow trenches for laying of pipes for water supply in the following type of soils of sand,silt or othe loose soil ,wey sand or silt not under water light black cotton soil ,sandy loam and ordinary soil etc complete as per standard specification.

Supplying and filling the foundation and basement with stone dust in layers of not more than 15cm thick well rammed watered and compacted etc., complete complying with standard specification.

Plain Cement Concrete 1:4:8 (one part of cement, four part of Crushed Stone Sand (M- Sand) and eight part of coarse aggregates) using 40mm size ISS HBG metal including cost and conveyance of all materials to site and including for the mixing, laying and labour charges and all incidential charges such as water providing etc., complete as per standard specification

Centering for soffits of RCC slabs of plane surface like lintels, beams ,etc.,including strutting 3m high using mild steel sheets of size 90cm X 60cm X and B.G 10 stiffened with M.S angles of size 25mm X 25mm X 3mm laid over silver Oak (C.W) joists of size 10cm X 6.5cm (spaced at about 90cm c/c )and supported dy casurina props of 10cm to 13cm dia (spaced of 75cm C/C) complying with standard specification and directed - 10 m 2 (P & D)Data 38

Providing and laying in position Standardised Concrete Mix M-20 Grade in accordance with IS 456 - 2000 using 20mm and down graded hard broken granite stone jelly for all RCC items of works with minimum cement contenet of 325Kg/ cum and maximum water cement ratio of 0.55 including admixture (Plasticiser / super plasticiser) in recommended proportions as per IS 9103 to accelerate, related setting of concrete, improve workability without imparing strength and durability with about (5.0cum), 7730Kg of 20mm machine crushed stone jelly and with about (3.3 cum), 5156kg of 10 - 12mm machine crushed stone jelly and with about (4.79cum) 7670 kg of Crushed Stone Sand (M- Sand), but excluding cost of reinforcement grill and fabricating charges centering and shuttering but including laying, vibrating with mechanical vibrators, finishing, curing, etc and providing fixtures like fan clamps in the RCC floor / roof slabs wherever necessary without claiming extra cost etc., complete complying with standard specification and as directed by the departmental officers -

Suppling and fabricating and placing in position MS (or) R.T.S. bar for reinforcement to all RCC works as per the design given including cost of steel and binding wire also in all floors.

Dewatering using diesel Engine 10HP pumpset including Hire charges,cost of Diesel,Engine oil,pump operator,labour charges,conveyance of pumpset and fuel to site and back,loading,unloading and any other incidental charges etc complete

Hire charges for deploying earth moving machinery (JCB/Poclain) for earthwork including diesel, oil and labour charges etc complete

Crane

Poclain( Drilling Breaker)

Supply and Delivery of DUCTILE IRON SOCKET/SPIGOT PIPES FOR CLASS K7 AS PER IS 8329/2000 450mm DI Pipes etc complete as per Standard specifications

Lowering of D.I Pipes and specials in the trenches and laying to proper grade and alignment and as directed by the TWAD officers

Jointing C.I/ D.I-S/S pipes and specials with rubber gaskets (tyton joint) including cost of lubricants. (including cost of jointing materials)