414.5.1 Explosion control.
BC § 414.5.1
Explosion control shall be provided in accordance with the New York City Fire Code as required by Table 414.5.1 where quantities of hazardous materials specified in that table exceed the maximum allowable quantities in Table 307.1(1) or where a structure, room or space is occupied for purposes involving explosion hazards as required by the New York City Fire Code or Section 415 of this code. Table 414.5.1Explosion Control Requirements a, h MaterialClassExplosion Control MethodsBarricade construction Explosion (deflagration) venting or explosion (deflagration) prevention systems b MaterialClassExplosion Control MethodsBarricade construction Explosion (deflagration) venting or explosion (deflagration) prevention systems b Hazard Category Combustible dusts c– Not Required Required Cryogenic flammables– Not Required Required ExplosivesDivision 1.1 Division 1.2 Division 1.3 Division 1.4 Division 1.5 Division 1.6 Required Required Not Required Not RequiredRequired Required Not Required Not Required Required Required Not Required Not Required Flammable gasGaseous Liquefied Not Required Not Required Required Required Flammable liquidIA dIB e Not Required Not Required Required Required Organic peroxides gUI Required Required Not Permitted Not Permitted Oxidizer liquids and solids4 Required Not Permitted Pyrophoric gas g– Not Required Required Unstable (reactive) g4 3 Detonable 3 Nondetonable Required Required Not Required Not Permitted Not Permitted Required Water-reactive liquids and solids32 gNot Required Not Required Required Required Special Uses Grain processing– Not Required Required Where explosion hazards exist fDetonation Deflagration Required Not Required Not Permitted Required a. See Section 414.1.3. b. See the New York City Fire Code. c. As generated during manufacturing or processing. d. Storage or use. e. In open use or dispensing. f. Rooms containing dispensing and use of hazardous materials when an explosive environment can occur because of the characteristics or nature of the hazardous materials or as a result of the dispensing or use process. g. A method of explosion control shall be provided when Class 2 water-reactive materials can form potentially explosive mixtures. h. Explosion venting is not required for Group H-5 fabrication areas complying with the New York City Fire Code and Section 415.11.1 of this code.
