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IS 10658:1999 is the Indian Standard (BIS) for higher capacity dry powder fire extinguisher (trolley mounted). This standard specifies the requirements for material, construction, performance, and testing of higher capacity (25 kg to 150 kg) dry chemical powder (DCP) fire extinguishers mounted on trolleys. It covers aspects like cylinder construction, paint finish, expellant charge, discharge fittings, and fire performance ratings for Class A, B, and C fires.
Specification for Higher Capacity Dry Powder Fire Extinguisher (Trolley Mounted)
! These extinguishers are intended for large-scale fire risks in industrial and commercial settings and require trained personnel for effective operation.
! During inspection, verify compliance with the 'Marking' clause (Clause 10), which requires the BIS certification mark, fire rating, and manufacturing details.
! Periodic maintenance, especially checking the weight of the CO2 expellant cartridge, must be performed as per IS 2190 to ensure readiness.
EN 1866-1:2007CEN - European Committee for Standardization, Europe
HighCurrent
Mobile fire extinguishers - Part 1: Characteristics, performance and test methods
Covers wheeled fire extinguishers with similar capacity ranges and performance test methodologies.
NFPA 10, 2022 EditionNational Fire Protection Association, USA
MediumCurrent
Standard for Portable Fire Extinguishers
Includes a chapter on 'Wheeled Fire Extinguishers' covering their selection, installation, and maintenance.
ISO 7165:2017International Organization for Standardization, International
HighCurrent
Fire fighting — Portable and wheeled fire extinguishers
Specifies characteristics, performance requirements, and test methods for both portable and wheeled fire extinguishers.
AS/NZS 1850:2009Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Portable fire extinguishers - Classification, rating and performance - General requirements
Provides requirements for wheeled extinguishers, referencing the AS/NZS 1841 series for specific agent types.
Key Differences
≠The fire rating system is fundamentally different. IS 10658 specifies performance by extinguishing defined test fires (e.g., 21A, 233B), whereas the US system (NFPA 10/UL) uses a numerical rating (e.g., 160-B:C) that indicates the relative extinguishing capacity.
≠IS 10658 specifies a standard operating temperature range of 0°C to +55°C. European standard EN 1866-1 typically requires a wider range, such as -20°C to +60°C, to accommodate colder climates.
≠Hydrostatic test pressure requirements differ. IS 10658 mandates a test at 30 kgf/cm² (~29.4 bar) or 2.5 times the maximum working pressure. EN 1866-1 uses a formula based on maximum allowable pressure (PS), typically PT = 1.43 x PS.
≠IS 10658 specifies exact capacities of 25 kg, 50 kg, and 75 kg. International standards like EN 1866-1 are more general, applying to mobile extinguishers with a mass of extinguishing agent greater than 20 kg.
Key Similarities
≈All standards cover the same type of equipment: large-capacity dry powder fire extinguishers mounted on a wheeled chassis for mobility.
≈A minimum effective discharge of 85% of the total powder content is a common performance requirement across IS 10658, EN 1866-1, and ISO 7165.
≈All standards mandate the inclusion of critical safety features, such as a safety valve or rupture disc, to prevent cylinder failure from over-pressurization.
≈The basic construction principles are consistent, requiring a durable steel cylinder, a hose and nozzle assembly, a control valve, and a trolley with robust wheels for transport.
≈All standards require clear and durable marking on the extinguisher body, including operating instructions, type of agent, capacity, and fire classes it is suitable for.
Parameter Comparison
Parameter
IS Value
International
Source
Standard Capacities
25 kg, 50 kg, 75 kg
Generally defined as ≥ 20 kg of extinguishing agent
EN 1866-1:2007
Minimum Effective Discharge
85%
85%
EN 1866-1:2007
Minimum Discharge Time (for 50 kg unit)
30 seconds
20 seconds (minimum for all sizes ≥ 20 kg)
EN 1866-1:2007
Operating Temperature Range
0°C to +55°C
-20°C to +60°C (Standard class)
EN 1866-1:2007
Hydrostatic Test Pressure
30 kgf/cm² (~29.4 bar) or 2.5 x working pressure
PT = 1.43 x PS (Max. allowable pressure), but not less than 20 bar
EN 1866-1:2007
Minimum Hose Length (for 50 kg unit)
5 metres
Hose shall be at least 15 ft (4.57 m) long for units >100 lb (45kg)
NFPA 10, 2022 Edition
Body Material Specification
Mild Steel sheet conforming to IS 513 or IS 1079
Specifies material properties (e.g., tensile strength, elongation) and corrosion resistance, without mandating a specific steel grade.
EN 1866-1:2007
⚠ Verify details from original standards before use
Key Values7
Quick Reference Values
Minimum Dry Powder Capacity25 kg
Hydrostatic Pressure Test (Body)3.5 MPa
Minimum Effective Discharge (25 kg model)25 s
Minimum Throw Range (25 kg model)6 m
Minimum Fire Rating (25 kg model)20A & 233B
Body Sheet Thickness (welded, 50 kg)3.15 mm
Burst Pressure Test (Body)5.5 MPa
Tables & Referenced Sections
Key Tables
Table 1: Performance Requirements for Higher Capacity DCP Fire Extinguishers