GB 46996-2025 Superfine powder extinguishing agent
1 Scope
This document defines the terms and definitions related to superfine powder extinguishing agents, specifies the classification, models, requirements, inspection rules, as well as marking, packaging, instructions for use, transportation and storage of superfine powder extinguishing agents, and describes the corresponding test methods.
This document is applicable to the research and development, production, and inspection of BC superfine powder extinguishing agent and ABC superfine powder extinguishing agent products.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150 (all parts) Pressure vessels
GB/T 535 Fertilizer grade ammonium sulphate
GB/T 622 Chemical reagent - Hydrochloric acid
GB/T 3864 Industrial nitrogen
GB/T 4509-2010 Standard test method for penetration of bitumen
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB 14922 Laboratory animal - Microbiological and parasitical standards and monitoring
GB 14923 Laboratory animal - Genetic quality control
SH 0004 Solvent oil for rubber industry
XF 602-2013 Dry powder fire extinguishing equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
particle size D90
particle size corresponding to a mass fraction of 90% of the particles
3.2
superfine powder extinguishing agent
solid powder extinguishing agent with a particle size D90 less than or equal to 15 μm
3.3
ABC superfine powder extinguishing agent
superfine powder extinguishing agent capable of extinguishing Classes A, B, and C fires
3.4
BC superfine powder extinguishing agent
superfine powder extinguishing agent capable of extinguishing Classes B and C fires
3.5
main chemical content
basic components constituting the superfine powder extinguishing agent
Note: Additives used to improve properties such as storage, moisture resistance, and flowability of the extinguishing agent are excluded.
4 Classification
Superfine powder extinguishing agents are classified into two categories according to the type(s) of fire they are suitable for extinguishing: BC superfine powder extinguishing agent and ABC superfine powder extinguishing agent.
5 Models
The model designation method for superfine powder extinguishing agents is as follows:
Example: FCX(ABC)-II denotes an ABC superfine powder extinguishing agent that complies with both Type I and Type II extinguishing performance requirements.
6 Requirements
The main technical performance of the superfine powder extinguishing agent shall meet those specified in Tables 1 and 2.
Table 1 Physical and chemical properties
Item Technical requirements
Main chemical content (mass fraction) Any single main chemical content Published value ±(0.75+2.5×Published value)%;
Sum of all main chemical contents Sum of published values≥85%;
Primary main chemical content Published value≥75%
Bulk density
g/mL Published value (1±30%)
Moisture content (mass fraction) ≤0.25%
Moisture absorption rate (mass fraction) ≤3.00%
Water repellency No obvious water absorption or caking
Caking resistance (penetration)
mm ≥30.0
Low temperature resistance
s ≤5.0
Particle size D90
μm ≤15
Electrical insulation
kV ≥4.00
Toxicity The proportion of mice losing escape ability after the toxicity test shall not exceed 50%;
Mice possessing escape ability within 3d after the toxicity test shall not die
Table 2 Extinguishing performance
Item Technical requirements
BC superfine powder extinguishing agent ABC superfine powder extinguishing agent
Type I extinguishing performance a Class A fire 1 Wood crib fire — Extinguishing efficacy≤150 g/m3, temperature drop rate≥70%
Polypropylene fire — Extinguishing efficacy≤150 g/m3, temperature drop rate≥70%
Class B, C c fire 1 Extinguishing efficacy≤150 g/m3, temperature drop rate≥60% Extinguishing efficacy≤150 g/m3, temperature drop rate≥60%
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Models
6 Requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, instructions for use, transportation and storage
Annex A (Nominative) Test method for sodium bicarbonate content
Annex B (Normative) Test method for ammonium dihydrogen phosphate content
