CAPEX26: INTEGRATION OF HC/H2S DETECTORS WITH HVAC

Supply of Air Conveyance Duct — Supply of air conveyance ducting materials including frame and 40mm MS angle — GI sheet conforming to IS 277 / IS 655, galvanization as per IS 2629 / IS 4759, minimum zinc coating 120 GSM. GI sheet thickness as per IS 655:2006 Table 4 — by duct largest dimension: up to 750mm: 24G (0.63mm); 751–1500mm: 22G (0.80mm); 1501–2200mm: 20G (1.0mm); above 2200mm: 18G (1.25mm). Flanged joints with minimum 5mm felt lining / neoprene rubber gasket, associated hardware, GI rod (8mm dia.) with anchor fasteners. Acceptable makes: Tata / Jindal / Essar / Ispat / Bhushan / Kamdhenu / SAIL from authorised dealers only.

Fabrication & Installation of Air — Fabrication and installation of GI sheet air conveyance ducts as per site requirement. Flanged joints with minimum 5mm thick felt lining / neoprene rubber gasket. Angle supports not inferior to ISA 40×40×5mm at maximum 1.5m intervals. All joints airtight. Bends with radius not less than half the duct width or with properly designed interior curved vanes. Rates all-inclusive of fabrication, installation, labour and hardware.

Removal of Existing Defunct Duct 6000-Mumbai Refinery — Dismantling and removal of existing damaged / defunct duct portions and accessories (filters, dampers, bird screens etc.) as directed by HPCL Engineer-In-Charge. Scrap to be shifted to designated scrap yard within MR.

Painting of GI Duct — Cleaning and painting of existing and newly fabricated GI ducts — 1 coat red oxide primer and 2 coats synthetic enamel paint of HPCL approved shade. Rates all- inclusive of surface preparation, paint materials and labour.

FRP Coating Min 1mm Thick on — Providing FRP coating minimum 1mm thick on GI duct — applicable to external (open to sky) duct portions only, as per instruction of HPCL Engineer-In-Charge. Rates all-inclusive of materials and labour.

Wall Cutting & Reconstrct for — Civil work — breaking / cutting wall for duct entry and reconstruction of same as per original, inclusive of all materials and manpower.

Supply of Panel Filters — Supply of panel filters (any size as per site requirement). Filter type: HDPE non-woven synthetic media between 2 layers of high-density polyethylene mesh. Casing: GI flange type 1mm thick (IS 277). Efficiency: 95% down to 10 microns. Capacity: 1070 CFM.

Installation of Panel Filters — Installation of panel filters (any size as per site requirement) including removal of existing damaged / defunct filters with necessary hardware.

Servicing of Existing Air Grill — Removal, cleaning, repairing, painting (1 coat red oxide primer + 2 coats synthetic enamel, HPCL approved shade) and reinstallation of existing air grill body.

Supply of Fan Outlet Damper — Supply of fan outlet damper with fire-resistant flexible canvas connection and flanges as per existing size — flange: 40×4mm GI plate/flat-bar, fire-retardant cloth, GI hardware. GI sheet gauge as per IS 655:2006 Table 4.