The 2003 edition of IS 951 outlines the essential operational criteria for crash fire tenders deployed at airfields, emphasizing design, functionality, and safety attributes critical for swift and efficient aircraft fire suppression. This standard is intended for manufacturers, designers, and users, ensuring compliance with strict guidelines on water and foam delivery, crew protection, vehicle robustness, and performance across various terrains and emergency scenarios.
Overview
The 2003 edition of IS 951 outlines the essential operational criteria for crash fire tenders deployed at airfields, emphasizing design, functionality, and safety attributes critical for swift and efficient aircraft fire suppression. This standard is intended for manufacturers, designers, and users, ensuring compliance with strict guidelines on water and foam delivery, crew protection, vehicle robustness, and performance across various terrains and emergency scenarios.
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Contents
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Frequently Asked
Per IS 951 (2003), airfield crash fire tenders must have a foam tank with a minimum capacity of 500 liters. The water tank should be sized to supply at least double the foam tank's volume, equating to a minimum of 1000 liters, supporting multiple foam refills. This configuration ensures sustained firefighting effectiveness during airfield emergencies.
IS 951 mandates the use of stainless steel or glass reinforced fiberglass (GRF) for water tanks, with optional epoxy coatings on GRF for enhanced corrosion protection. Vehicle cabins and bodies should be built from high-strength materials that provide fire resistance, thermal and acoustic insulation, and weatherproofing. Aluminium chequered sheets with drainage gutters are specified for cabin roofs to prevent water and foam accumulation.
The standard requires fire pumps to deliver a minimum of 4000 liters per minute at 8.5 kg/cm² pressure with a suction lift of 1.5 meters, and be capable of 3000 to 4000 liters per minute at pressures up to 12.5 kg/cm² for monitor operation. Foam induction ratios must be selectable at 3%, 6%, and 8% with minimal variation. Hand-lines should deliver at least 500 liters per minute with a reach of 25 meters, and the system must allow simultaneous use of the monitor and two hand-lines at rated pressure.
IS 951 specifies that cabins be constructed with fire-resistant, thermally and acoustically insulating materials, designed to withstand heat exposure and rollover incidents. Seating is provided for five occupants, including adjustable driver seats and a fixed bench for crew, with sufficient space for protective gear and breathing apparatus. Safety glass windows, wide drainage gutters, doors opening to 90°, and ergonomic provisions like heaters, seat belts, communication systems, and visibility aids contribute to crew safety and comfort.
The standard necessitates a roof-mounted siren producing 95 dB at 100 meters with 90° coverage, flashing ray lights or light bars, selective beam headlights, dual tail and stop lights, four-corner signal lights with visual and audible alerts, adjustable spotlights on the windshield ends, reflectors marking vehicle dimensions, reverse lights with audible warnings, and compartment illumination including inspection and fog lamps. All controls must be accessible from the driver's cabin to ensure operational readiness and safety.
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