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IS 950:2012 is the Indian Standard (BIS) for functional requirements for water tender, type b for fire brigade use. This standard prescribes the functional requirements, materials, design, and construction specifications for Type B Water Tenders used by fire brigades. It is utilized by fire safety engineers, manufacturers, and municipal procurement officers to ensure fire fighting vehicles meet the necessary operational capacities, pump performance, and safety metrics.
Functional Requirements for Water Tender, Type B for Fire Brigade Use
! Type B water tenders are primarily distinguished by their larger 4500L water tank, making them suitable for areas with scarce water supply (compared to Type A's 2000L).
! Always verify that the commercial chassis's Gross Vehicle Weight (GVW) limits are not exceeded when fully loaded with the 4500L of water, crew, and all stowed equipment.
! Baffles must be correctly designed and installed inside the water tank to prevent dangerous water surging during transit, which can affect vehicle stability.
EN 1846-2:2009+A1:2013European Committee for Standardization (CEN), Europe
HighCurrent
Firefighting and rescue service vehicles - Part 2: Common requirements - Safety and performance of firefighting and rescue service vehicles
Defines requirements for medium-class (M) pumping appliances, which are conceptually similar to a Type B tender.
NFPA 1901:2016National Fire Protection Association (NFPA), USA
MediumCurrent
Standard for Automotive Fire Apparatus
Covers 'Pumper Fire Apparatus' which shares the same core function, but with different performance classes.
Key Differences
≠The pump capacity specified in IS 950 (1800 LPM @ 7 bar) is significantly lower than the minimum requirement in NFPA 1901 for a pumper (approx. 2840 LPM @ 10.3 bar) and common European configurations (e.g., 2000 LPM @ 10 bar).
≠IS 950 mandates a specific water tank capacity of 4500 litres for Type B, whereas international standards like NFPA 1901 and EN 1846-2 specify a much lower *minimum* capacity, allowing for more variation.
≠NFPA standards include highly detailed requirements for crew cabin safety, including crashworthiness and stability tests (tilt-table), which are more stringent than the general safety provisions in IS 950.
≠The classification methodology is different. IS 950 uses Type A/B/X based on chassis and capacity, while EN 1846 uses mass (Light, Medium, Super) and terrain capability, and NFPA 1901 uses function (Pumper, Tender, Aerial).
Key Similarities
≈All standards define the core functional requirements for a self-propelled vehicle equipped with a water tank, a pump, hoses, and equipment for firefighting operations.
≈They all accommodate the use of modified commercial truck chassis as the foundation for the apparatus, which is standard practice for this vehicle class globally.
≈The requirement for a fully enclosed crew cabin, structurally separate from the equipment bodywork, is a common safety feature across all standards to protect firefighters during transit.
≈All standards address the need for adequate stowage for ancillary equipment like hoses, nozzles, and ladders, ensuring the vehicle arrives on-scene ready for operation.
What is the primary difference between a Type A and Type B water tender?+
Type A (IS 948) has a 2000L water tank capacity, whereas Type B (IS 950) has a 4500L water tank capacity.
What is the required performance of the main fire pump?+
The centrifugal fire pump must deliver an output of 2250 liters per minute at a pressure of 0.7 MPa (7 kg/cm²).
How many personnel should the crew cabin accommodate?+
The vehicle cabin must be designed to safely seat the driver, an officer, and up to 4 to 5 additional crew members (typically a 6-man crew).
What are the stability and road performance requirements?+
The fully loaded appliance must accelerate from 0 to 64 km/h in 45 seconds, achieve a max speed of 72 km/h, and safely negotiate a minimum turning circle.