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| 1 | Earth work excavation and depositing on bank with initial lead of 10 m and lift of 2 M in narrow trenches having bed width 1.25m & below for laying of pipes for water supply and sewerage works in the following type of soils as directed by Departmental officers.Sand, silt or other loose soil, wet sand or silt not under water light black cotton soil, sandy loam and ordinary soil.SS20B |
| 2 | Supply and delivery of 400mm dia HDPE pipes for sewerage PE 100 PN 6 conforming to IS : 14333/1996 (amended in 2009) including cost of materials and transporting charges etc., completed as directed by departmental engineers. |
| 3 | Lowering of 400 mm dia HDPE pipes and specials to trenchand laying to proper grade and alignment and as directed by the departmental engineers |
| 4 | Supply and delivery HDPE specials for 400mm dia 90 degree bend as per IS 8360/1977/Part I(Reaffirmed 1992) Part II and III (Reaffirmed 2002) including cost of materials and transporting charges etc., completed as directed by departmental engineers |
| 5 | Refilling with excavated soil (other than sand) complying with standard speHDPEfication for filling in foundation and basement. |
| 6 | Jointing HDPE Pipes and Specials by butt fusion welding / electro fusion welding joints using fusion equipment as per ISO 21307-2011 and as per IS 7634 (part2) : 2012 including cost of hire charges for butt fusion equipment power supply arrangements etc., complete as per directed by Departmental officers . |
| 7 | Construction of Thrust block as per standared design drawing - including cost of all materials including earth work excavation, PCC, cost of reinforcement, shutering and plastering HDPE ng the same above or below ground level as directed by the Departmental officers. |
| 8 | Barricading work (Where, there is less traffic areas and broader roads etc.) for laying of pipe line using casurina poles at 1.50m center to center (8cm to 10cm dia and 1.80m height) vertical with horizontal poles in three rows including painting the vertical poles in the road facing sides with ready mix paint, tying the vertical and horizontal poles with coir rope including fixing charges and fixing 75mm dia reflectors including earth work excavation for fixing vertical posts and finally removing and stacking the materials safely for further use etc., complete and as directed by Departmental Engineers |
| 9 | Excavating of driving pit and receiving pit of size 3.00m (length) x 3.50m (breadth), depth upto 5m in all soil strata including shoring and strutting using 6mm tk MS Plate of size 3.50m x 3.50m usable for 15 operations and providing 16mm thickness MS plate of size 3.00m x 3.50m with 100mm x100mm x 12mm angles of 4m length for holding the MS plates for Thrust arrangements to receive the impacts during pushing operation of encasing pipe. Lowering the following size of MS encasing pipe by using Contractor’s crane and machineries and jointing MS pipes by welding, across the National Highways/ State Highways/ Railways/Canal crossing etc.and driving the horizontal bore by pushing / jacking method (trenchless technology method) using contractor’s machineries such as cranes, jacks, jacking materials, generator,welding machineries, compressor, jackhammer and other equipments etc. without interfering and causing any hindrance to the movement of traffic or any other vehicles,without any disturbances to the railway/ road/canal formation etc. including bailing / pumping of water where ever necessary without affecting any installation like water supply pipeline/telephone cable, electric cables etc. passing nearby area and scooping the earth inside the pipes and pit and depositing the surplus earth in a convenient place and leveling the site after completion of entire work as directed by Departmental Engineers.The rate includes the cost of driving pit,thrust bed/wall and receiving pit excluding the cost of MS pipes. |
| 10 | Supply and Delivery of MS pipes of preferred dimensions ranging from 168.30mm OD to 2540mm OD having 2.6mm to 25mm thickness as per Table- 5 of IS 3589/2001 fabricated with Fe410 grade steel conforming to IS 3589:2001 and other allied codes.Pipes shall be internally lined with plant applied cement mortar lining 1:2, The Lining thickness range from 6 mm to 12 mm for 168.3 mm OD to 2540 mm OD as per Table -8 of IS 3589:2001Pipes shall be externally coated with plant applied CM 1:3, minimum 20mm thick includingreinforcement as per clause A-9 of Annex-A of IS 3589:2001.Fabricating ,testing,supply , delivering of MS pipes spiral / longitudinal welding including transportation. |
| 11 | Supply and delivery of submersible centrifugal sewage non-clog pumps, vertical spindle type pump, wear resistance with submersible motor for the various duty conditions. Pump shall be capable of handling min 100 mm solid size with sewage specific gravity of up to 1.05. Pump shall be of robust construction, Liquid passages shall be finished smooth and 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 should be provided to protect the motor from ingress of sewage along the shaft. The critical speed of the rotor shall be at least 30% above the operating speed. Pumps should have double bearings between the pump & motor. The bearings life shall be minimum 100,000 hrs of operation with greased for life. Pump should be provided with automatic coupling device including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitate lifting and lowering into guide rails for easy maintenance. Pump shall be provided with a stainless steel lifting chain conforming to BS 970 Gr 304. Pump speed shall be of 9600 rpm for high duty pumps and 960/1450 rpm for low duty pumpsets. Casing and impeller should be of CI Gr. FG 260:IS210 more preferably with hardened impeller.Shaft should be of stainless steel AISI 410. All the fasteners and bolts shall be of AISI 410.The submersible motor shall be operated with 3ph, 415 V (+or– 10%), 50Hz (+or-5 %) dry induction type. Motor shall be capable of giving rated output without reduction in the expected life span when operated continuously. The rotating assembly shall be dynamically balanced as per standards. The starting current of the motor shall not exceed 200% of rated full load current for Star / Delta or ATS starting under any circumstances .The motor shall be suitable for full voltage star delta / ATS starting. The locked rotor 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 shall be 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 IS 4691. 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 temperature sensor 3core x 1.5 sq.mm copper conductor and for bimetallic switches 2core x 1.5 sqmm copper conductor shall be provided. Motor shall be supplied with 10m of round submersible copper cable of suitable size. The non clog submersible 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 |
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