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IS 944:1979 is the Indian Standard (BIS) for functional requirements of 1800-1/min trailer pump for fire brigade use. This standard prescribes the functional, performance, and testing requirements for a 1800-litres per minute capacity trailer-mounted pump used by fire brigades. Engineers and fire safety professionals use this code to ensure the proper specification, design, chassis stability, and hydraulic performance of mobile pumping equipment.
Functional Requirements of 1800-1/Min Trailer Pump For Fire Brigade Use
Covers engine-driven portable pumps; a trailer pump is conceptually a large, wheeled portable pump.
Key Differences
≠IS 944:1979 specifies a single prescriptive performance point (1800 l/min at 7 kgf/cm²), whereas modern standards like EN 1028-1 and NFPA 1900 use a classification system (e.g., FPN 10-2000) or multi-point performance curves (e.g., 100% capacity at 150 psi, 70% at 200 psi).
≠The rated pressure in IS 944 is significantly lower (7 kgf/cm² or ~100 psi) compared to the standard NFPA 1900 requirement of 150 psi (~10.3 bar) for 100% rated flow.
≠Modern standards mandate advanced safety and control features like electronic pressure governors, intake relief valves, and comprehensive digital instrumentation, which are absent in the 1979 Indian Standard.
≠IS 944:1979 is focused on functional requirements, while standards like NFPA 1900 and EN 14466 include extensive safety requirements for the operator, such as noise level limits, exhaust gas direction, and guarding of hot/moving parts.
Key Similarities
≈All standards are fundamentally based on using a centrifugal pump coupled to an internal combustion engine as the core of the unit.
≈A mandatory requirement across all standards is the inclusion of a priming system to enable drafting from unpressurized water sources like rivers or lakes, with specified performance criteria for lift height and time.
≈All standards require rigorous performance testing to verify the pump's ability to meet its rated capacity, pressure, and suction lift capabilities, including a continuous endurance test.
≈The basic specified components are similar, including a prime mover (engine), pump, primer, suction and delivery connections, and essential instrumentation like pressure and vacuum gauges.
Parameter Comparison
Parameter
IS Value
International
Source
Rated Capacity
1800 l/min
Common rating of 500 gpm (1893 l/min)
NFPA 1900
Rated Pressure (at rated capacity)
7 kgf/cm² (approx. 7 bar or 100 psi)
150 psi (10.3 bar)
NFPA 1900
High Pressure Performance Point
Not defined as a standard curve; a test at 8.5 kgf/cm² is specified.
Must deliver 50% of rated capacity at 250 psi (17.2 bar)