What type of gas is used to propel the dry powder?

Nitrogen gas is used as the propellant, stored under high pressure in seamless steel cylinders.

What types of fires is this tender suitable for?

It is highly effective for large-scale Class B (flammable liquids) and Class C (flammable gases/electrical) fires.

What is the minimum length required for the hose reel?

The tender must be equipped with hose reels containing at least 30 meters of hose.

IS 955

: 1980

Functional Requirements for Dry Powder Tender for Fire Brigade Use

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This standard specifies the functional requirements for materials, design, construction, workmanship, and testing of dry powder fire tenders. It is used by fire equipment manufacturers and fire departments to ensure these specialized vehicles can effectively suppress severe Class B and Class C fires in high-risk zones like oil refineries, chemical plants, and airports.

Functional Requirements for Dry Powder Tender for Fire Brigade Use

Quick Reference Values

propellant gasNitrogen stored in seamless steel cylinders

hose reel lengthMinimum 30 meters

hose reel discharge rateNot less than 2.5 kg/s

monitor discharge rate15 to 40 kg/s depending on capacity

minimum road clearance230 mm

working pressure testTested to 1.5 times the maximum working pressure

Practical Notes

Ensure nitrogen cylinders are compliant with the Gas Cylinder Rules and are securely mounted to withstand vehicle movement.

The dry chemical powder used must conform to IS 4308 and must be compatible with any foam suppression systems that might be used simultaneously on site.

Regular maintenance must ensure powder has not caked or compacted inside the vessel due to vehicle vibrations or moisture ingress.