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IS 951:2009 is the Indian Standard (BIS) for portable fire extinguishers - general requirements. This standard outlines the general specifications, performance criteria, and construction requirements for portable fire extinguishers. MEP and fire safety engineers use it to ensure that the initial fire suppression equipment procured for buildings and industrial setups is reliable, tested, and structurally sound.
Lays down general requirements for the materials, construction, performance, and testing of various types of portable fire extinguishers.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always cross-reference with IS 2190 for the actual selection, installation, and maintenance guidelines of these extinguishers.
! Ensure that the fire extinguisher medium (water, foam, DCP, CO2) is correctly matched to the anticipated fire class hazard (Class A, B, C, or D) of the designated area.
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International Equivalents
Similar International Standards
ISO 7165:2017ISO (International)
HighCurrent
Fire-fighting — Portable fire extinguishers — Performance and construction
Covers performance, construction, and testing methods for new portable fire extinguishers, very similar to IS 951's intent.
EN 3-7:2004+A1:2007CEN (European Union)
HighCurrent
Portable fire extinguishers - Part 7: Characteristics, performance requirements and test methods
Defines characteristics, performance requirements, and test methods; widely adopted and very similar in approach to IS 951/15683.
UL 711UL (US)
MediumCurrent
Standard for Rating and Fire Testing of Fire Extinguishers
Focuses specifically on the fire test and rating methodology, a key component of IS 951's performance requirements.
NFPA 10NFPA (US)
LowCurrent
Standard for Portable Fire Extinguishers
Primarily covers selection, installation, inspection, maintenance, and recharging, not manufacturing requirements like IS 951.
Key Differences
≠IS 951 mandates specific body colors for different extinguishing agents (e.g., Red for Water, Cream for Foam). In contrast, EN 3 mandates a red body with a small color-coded band indicating the agent.
≠The fire rating system in the US (UL/NFPA) uses a different nomenclature and test fire basis (e.g., 2-A:10-B:C) compared to the IS and EN/ISO systems, which are more aligned (e.g., 13A, 89B).
≠External corrosion resistance requirements differ. IS 951 specifies a 240-hour neutral salt spray test, whereas EN 3-7 requires a more stringent 480-hour test.
≠Minimum discharge time requirements can vary. For a 9L water extinguisher, IS 15683 (linked to IS 951) requires a minimum of 60 seconds, while EN 3-7 may allow for shorter times like 45 seconds depending on the fire rating achieved.
Key Similarities
≈All standards are based on a harmonized classification of fires into classes: Class A (solids), Class B (liquids), Class C (gases), and Class D (metals).
≈A fundamental requirement across all standards is the hydrostatic pressure testing of the extinguisher cylinder to a factor of its service pressure to ensure mechanical integrity.
≈All standards employ a performance-based approach, requiring extinguishers to pass standardized fire tests (e.g., wood cribs for Class A, liquid trays for Class B) to achieve a rating.
≈Core safety design features are common, including the mandatory presence of a safety pin to prevent accidental discharge, clear operating instructions, and secure component attachments.
Parameter Comparison
Parameter
IS Value
International
Source
Body Colour (Water Type)
Post Office Red (entire body)
Red body (>95%) with a Signal Red colour band
EN 3-7
External Corrosion Test (Salt Spray)
240 hours
480 hours
EN 3-7
Standard Operating Temperature Range (Water Based)
+5 °C to +55 °C
+5 °C to +60 °C
EN 3-7
Cylinder Burst Pressure Requirement
≥ 2.5 x Test Pressure (Pt)
≥ 2.7 x Max Service Pressure at 60°C (PS)
EN 3-7 / ISO 7165
Minimum Discharge Time (9L Water)
60 seconds (as per IS 15683)
45 seconds (for rating >21A)
EN 3-7
Hose Assembly Burst Pressure
≥ 3 x Test Pressure (Pt)
≥ 2.5 x Max Service Pressure at 60°C (PS)
EN 3-7
Impact Test
Drop from 1.0 m height
Drop from 1.2 m height
ISO 7165
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
discharge time8 to 13 seconds minimum (varies by capacity)
operating temperature range-20°C to +55°C (depending on extinguishing medium)
hydrostatic test pressureTypically 3.5 MPa for low-pressure cylinders
What classes of fire do these portable extinguishers cover?+
Depending on the medium, they can cover Class A (solid combustibles), Class B (flammable liquids), Class C (flammable gases), and Class D (combustible metals).
What is the standard operating temperature for portable extinguishers?+
Typically -20°C to +55°C, although water-based extinguishers must be protected from freezing conditions.
Is regular hydrostatic testing required for the cylinders?+
Yes, extinguisher cylinders must undergo periodic hydrostatic pressure testing to ensure structural integrity and prevent bursting.