NATIONAL ALUMINIUM COMPANY LIMITED - Rites

approach/maintenance platforms, handling for equipment, civil and structural works and
necessary accessories shall be provided for WT hopper top & all transfer points, etc.
16.2.2 Sump Pump
4x100% sump pumps alongwith level switches and piping up to nearest Owner's drain (max.
up to 50.0 meters from outside the building) shall be provided at all locations wherever
natural drainage is not possible. Sump pumps along with drain pits shall be provided at other
locations also, if required, during detailed engineering stage. Sealing pumps with valves,
piping fittings and other accessories for sealing of sump pumps shall be provided.
16.2.3 Service Water System
Service water distribution system complete with water supply system, valves, quick
couplings, hose pipes with nozzle, piping, pumps, drive motors with canopy, couplings with
enclosure, electricals, including supporting structures, handling for equipment’s, civil and
structural works and necessary accessories shall be provided throughout the coal handling
plant area in Contractor’s scope.
16.2.4 Pipings, Fittings, Valves and Specialities
The material to be supplied for completing the pipe work shall include but not be limited to
the following :
(1) Straight piping, bends, tees, elbows, branches, laterals, crosses, reducing unions,
couplings, caps, blank flanges, saddles etc. necessary for making reliable piping system.
(2) Gaskets, ring joints, ints, jointing material etc. as required.
(3) Instrument tapping connections, stubs.
(4) Gate, globe and check valves to start/stop, regulate and to prevent back flow.
(5) Duplex Strainers.
(6) Anchors, hangers and supports as required including secondary steel embedments etc.
(7) Bolts, nuts, fasteners as required for interconnection piping, valves and fittings as well
as for terminal points.
(8) The entire water piping of DS/SW/PW/CW shall be routed/supported on concrete
pedestal and conveyor galleries. Whereever the layout does not permit the pipes to be
routed over ground, the same shall be buried in conformity to the relevant standards &
shall be provided with necessary protective coating as per relevant standards.
(9) Painting, anti-corrosive corrosive coatings etc. inside and outside pipe pipes s as necessary.
(10) Welding electrodes and welding rods.
(11) The area around storage tanks strainers, two valves etc. (located out side pump house)
shall be paved with drains.
16.3 Terminal Points
Owner shall provide supply of water for dust suppression system, service water, potable
water at one terminal point as elaborated elsewhere. Beyond the terminal point, the
complete pipe work along with associated valves, specialities, instruments, fittings and
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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