The 1979 edition of IS 944 outlines the operational criteria for trailer-mounted fire pumps with a capacity of 1800 liters per minute for fire brigade applications in India. It details the design requirements, material standards, manufacturing processes, performance benchmarks, and necessary accessories to guarantee dependable and efficient firefighting equipment. This code is essential for manufacturers, fire service engineers, and procurement teams handling trailer pumps.
Overview
The 1979 edition of IS 944 outlines the operational criteria for trailer-mounted fire pumps with a capacity of 1800 liters per minute for fire brigade applications in India. It details the design requirements, material standards, manufacturing processes, performance benchmarks, and necessary accessories to guarantee dependable and efficient firefighting equipment. This code is essential for manufacturers, fire service engineers, and procurement teams handling trailer pumps.
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Frequently Asked
IS 944 mandates that the trailer pump should deliver a minimum flow of 1800 liters per minute at a pressure of 0.7 MN/m² (7.0 kgf/cm²). It must be capable of operating continuously for four hours with a vertical suction lift of 3 meters, maintaining specified performance without requiring engine cooling water replenishment, and ensuring engine oil temperature stays within permissible limits. This configuration supports effective fire brigade deployment.
The standard specifies that the pump should be powered by an internal combustion engine having at least four cylinders conforming to IS 1603-1960. The engine must provide sufficient brake horsepower to run the pump at its rated capacity of 1800 liters per minute at 0.7 MN/m² pressure, including a power reserve. Petrol engines are to feature dual coil ignition with automatic cutoff, and a 12-volt, 92 Ah battery supported by a generator or alternator is required to maintain electrical supply.
IS 944 requires the pump casing to be constructed from either Aluminium alloy Grade 4600 A (per IS 617-1975) or Leaded tin bronze Grade II (as per IS 318-1962). The impeller ring and neck ring must be made of Leaded tin bronze Grade II. Engine covers and pump panels are to be fabricated from ordinary grade mild steel sheets complying with IS 513-1973. The trailer chassis should use suitable mild steel sections, and the axle must be carbon or mild steel, all conforming to specified clauses. Furthermore, all parts in contact with water must be corrosion resistant or suitably treated.
The trailer pump assembly must not exceed 3.3 meters in overall length and 1.6 meters in overall height, including any mounted spotlight. The width between wheels (wheel track) should be no more than 1.4 meters. The trailer frame incorporates two semi-elliptic springs compliant with IS 1135-1973, with axles designed for cross-country terrain, and pneumatic tires sized 6.00 x 16 with 6 ply rating. Although the standard does not specify a strict maximum weight, the total mass including water, fuel, and oil should not surpass 1150 kilograms, ensuring a low center of gravity for towing stability.
The trailer pump must be equipped with an electric taillight fitted with a number plate plug at the front, a comprehensive set of maintenance tools, and a headlight with a diameter not exceeding 150 mm. Essential equipment includes suction wrenches for 100-mm suction hose couplings, a suction strainer for 100-mm hose, several 63-mm delivery hoses of 30 meters each with instantaneous couplings, a 15-meter manila rope, suction adapters converting 100-mm female to 63-mm instantaneous male connections, and branch pipes of 63 mm diameter. These accessories ensure the pump’s operational readiness and conformity with IS standards.
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