Laying of chilled water pipeline

SIT&C of under ground MS (Mild steel) chilled water pipe along with THERMOCOLE insulation, (chilled water pipe Nominal Dia -600mm, Thickness 9.5mm). For this item separate General & Specific specification, specification for thermocole are provided that needs to be considered as scope of work.

SIT&C of "Resilient Seated Soft Sealing" Gate Valves (Sluice Valves) of 600 mm NB with Body and Bonnet of Ductile Iron and Wedge fully Rubber Lined with food grade quality grade EPDM, The Valves should be Vacuum tight and 100% leak proof with face to face dimensions as BS:5163 Type A/IS:14846. All the valves should be with fusion bonded Electrostatic Powder coating both inside and outside (Min 250 Microns). Pressure rating should be min PN 1.6 (MPa). suitable shaft extention with geared arrangement for operation of buried valve should be provided from over ground side. TF quality thermocole insulation with mortar lining shall be provided

SIT&C of 150mm size kinematic air valve with flange end. Ductile iron body. PN16 pressure rating

Providing and laying design mix reinforced cement concrete of M30 Grade by weigh batching using graded stone aggregate of 20mm max. size and coarse river sand/ crushed stone sand of approved quality including admixtures of approved Brand and quality, including handling & transportation, scaffolding, mechanical mixing, placing to required location by hoisting and / or pumping & mechanical vibration, consolidation, finishing, curing, hacking of concrete surfaces wherever required etc. complete at all levels in substructure/superstructure, roads, etc as per specifications & also including dewatering, if any, complete all as per drawings and technical specifications and as directed by the Engineer-in-Charge but excluding formwork, shuttering and steel reinforcement.

Providing and laying in position cement concrete of 1:3:6 (1 cement, 3 river Coarse river sand/ crushed stone sand, 6 graded stone aggregate of maximum size 20 mm) at all elevations including consolidation, finishing curing etc. complete all as per approved drawings and technical specifications and as directed by the Engineer-in-Charge but excluding the cost of form work shuttering, centering all as directed by Engineer-in-charge.

Providing Reinforcement steel of all diameters for reinforced cement concrete at all levels. including supplying, preparation of bar bending schedules, cutting, bending, transporting to all elevations, placing and keeping in positions, all leads, fixing, tieing with 1.2 mm dia annealed GI coated binding wire including all labour charges, cost of cover blocks (in same grade of concrete) of various thicknesses and sizes etc. all as per drawings and technical specifications and as directed by the Engineer-in-Charge.

Providing Structural steel work using angles,plates, channels,joists, tubular and other sections,welded and/or bolted inbuilt up sections for trusses,structural steel floors, frameworks, monorails and other structures including supplying, cutting, welding, fabricating, hoisting, fixing in position,applying two coats of priming coat of approved steel primer followed by 2 coats of epoxy coating etc.complete all as per specifications,drawings and as directed by the Engineer in charge

Providing, centering ,shuttering Form work using Film faced plywood to get a neat form finish surface for all types of structures including necessary strutting, steel/timber framework, steel proping, staging, supports etc and deshuttering the same after the specified time all as per drawings and technical specifications and as directed by the Engineer-in-Charge

Earth work Excavation for trenches/pedestals of required width not more than 1.5 m and depth up to 2 m from average gound level for RCC/MS/other pipes, RCC trenches, etc. in all types of soils / murrum etc. (except soft and hard rock) by mechanical/mannual means including dressing the sides of trenches, ramming of bottoms, including shoring, strutting and dewatering and refilling after installation of pipes, arround RCC trenches with selected excavated earth in layers of not more than 250 mm thick, each layer well rammed and consolidated including disposing the surplus earth within a distance of 200 m all as per specifications and as directed by the Engineer-in-charge.

Filling of areas with gravel/Murrum brought from outside BARC sources, for embankment, below pipelines, pedestals, around building etc., including loading, transporting, unloading, removal of organic matter/roots/plastic/ all kinds of vegetation/small shrubs, etc., breaking of lumps and spreading in layers maximum compacted thickness of 250mm thick with suitable Earth rammers/vibro roller to achieve a minimum of 90% proctor density at optimum moisture content with all lifts, bailing/ pumping out of water to keep the site dry while backfilling, etc. complete all as per drawings and Technical specifications and as directed by the Engineer-in-Charge. Notes: 1. All necessary tests shall be conducted as per QAP and rate quoted shall include all tests. 2. The rates are applicable for the net quantities arrived as per the actual difference in levels jointly taken by the department and the contractor after compaction of the earth as mentioned in the item description. . 3. The rates quoted shall include all senorage, mining charges etc. 4. The gravel shall be procured from approved sources.