Overview
ISO 7202:2018 - Fire protection - Fire extinguishing media - Powder - specifies requirements for the chemical and physical properties and minimum performance of fire extinguishing powders intended for use on fires of Classes A, B, C and D. The standard establishes test methods, manufacturer declaration requirements (a characterization statement), sampling rules and performance criteria to ensure powders sold for firefighting have a validated extinguishing capability. (Fire classification reference: ISO 3941.)
Key topics and technical requirements
ISO 7202:2018 addresses a comprehensive set of technical topics and test methods, including:
- Characterization statement and manufacturer data: information manufacturers must declare about powder composition and properties.
- Sampling procedures for acceptance and verification testing.
- Physical properties: bulk density, sieve analysis (particle size distribution), fluidity.
- Chemical content: declaration and testing of constituents, including requirements for mono ammonium phosphate (MAP) content in ABC-type powders.
- Performance tests: defined fire test methods for suitability on Class A, B, C and D fires.
- Durability and handling properties: resistance to caking and lumping, water repellence, moisture content and moisture absorption.
- Electrical properties: electrical insulation value testing to assess safety for Class C (electrical) fires.
- Test method specifications: detailed apparatus, procedures and evaluation rules (bulk density, sieve analysis, fluidity, moisture tests, MAP titration, etc.).
- Informative annexes: guidance on compatibility with foam agents, suitability and equivalence in equipment, sampling methods and alternative test methods (including a Japanese titration method for MAP in Annex E).
Notable updates in the 2018 edition include new requirements and test methods for MAP content (subclause 5.5 and 13.10) and the addition of Annex E.
Applications - who uses this standard
ISO 7202:2018 is used by:
- Manufacturers of dry chemical and powder extinguishing media for product specification, quality control and labeling.
- Testing and certification laboratories performing compliance testing and performance verification.
- Fire protection engineers and system designers selecting powders for portable extinguishers or fixed systems.
- Procurement, regulators and safety officers specifying compliant extinguishing powders for facilities and firefighting equipment.
- Equipment manufacturers (extinguishers, powder delivery systems) assessing compatibility and suitability (see Annexes A and B).
Practical uses include product development, batch acceptance testing, supplier qualification, and ensuring powders meet safety and performance expectations for specific fire classes.
Related standards
- ISO 3941 - Fire classification (referenced for fire classes)
- ISO 3310-1 - Test sieves (sieve analysis)
- ISO 4788 - Lab glassware (measuring cylinders)
- ISO 7165 - Portable fire extinguisher performance and construction
Keywords: ISO 7202:2018, fire extinguishing powder, fire protection, Class A B C D, mono ammonium phosphate (MAP), powder testing, fluidity, caking resistance, moisture content, electrical insulation.
