This standard delineates the operational and construction criteria for Water Tender Type 'X' utilized by fire services, emphasizing design, materials, and performance parameters. It particularly addresses firefighting challenges in aviation incidents and water-deficient zones, detailing specifications for tank capacity, pump efficacy, hose equipment, electrical installations, and safety mechanisms to guarantee dependable firefighting support.
Overview
This standard delineates the operational and construction criteria for Water Tender Type 'X' utilized by fire services, emphasizing design, materials, and performance parameters. It particularly addresses firefighting challenges in aviation incidents and water-deficient zones, detailing specifications for tank capacity, pump efficacy, hose equipment, electrical installations, and safety mechanisms to guarantee dependable firefighting support.
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Contents
Structure
Frequently Asked
According to the standard for Water Tender Type 'X', the water storage tank must have a capacity of 6,000 litres. For tenders with rear-mounted pumps, a single tank configuration is required, whereas those with midship-mounted pumps should have two interconnected tanks. This arrangement ensures sufficient water availability for firefighting operations.
The standard specifies that pump casings and impellers should be fabricated either from die-cast aluminium alloy conforming to IS: 617-1975 or from lead tin bronze of Grade LTB-2 as per IS: 318-1981. These materials are chosen to provide a combination of light weight, mechanical strength, and resistance to corrosion and wear.
The centrifugal pump must deliver 3,200 litres per minute at a pressure of 7 kgf/cm² with a 3-metre lift under standard conditions. An alternate operational point is 2,250 litres per minute at 8.8 kgf/cm² pressure with the same lift. The pump should sustain continuous operation for four hours at rated output without exceeding specified engine oil, cooling water, and oil sump temperature limits. Additionally, hydraulic pressure testing at 21 kgf/cm² must demonstrate the integrity of the casing and impeller.
The electrical system must incorporate individual fuses for critical circuits, all housed within a common fuse box located inside the driver's compartment, which shall include holders for spare fuses. Wiring should be of single-pole type, adequately shielded from environmental exposure, with conduit protection where necessary. The battery charger must be of a trickle type designed for in-place recharging and equipped with a red pilot lamp to signal charging status. Essential electrical accessories such as lamps, sirens, bells, and lighting for operational safety are also mandated.
Safety provisions include preferably fully enclosing the pump for protection while keeping control instruments and gauges exposed for viewing. The pump should be connected to the vehicle’s prime mover via a power take-off (PTO) system capable of transmitting full engine torque, with a locking control lever situated in the driver's cabin. Control panels must be suitably illuminated and positioned—either a single rear panel for rear-mounted pumps or dual side panels for midship mounted pumps. Pump testing mandates continuous four-hour operation at rated conditions with strict temperature thresholds. Suction inlets must incorporate internal strainers with removable blank caps to ensure operational reliability and safety.
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