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NFPA 68 Standard on explosion protection by deflagration venting

RegSenseEnforcement and Audits - OSHAEnforcement and Audits - OSHASafety & HealthVentilationGeneral Industry SafetyIndustrial HygieneConsensus StandardsIndustry Consensus StandardNational Fire Protection Association (NFPA)EnglishFocus AreaUSA

This standard provides information for the design and utilization of vents to limit pressures developed by explosions of dusts, gases, or vapors. The standard applies to buildings, rooms, bins, and equipment and attempts to help prevent or reduce structural or mechanical damage. OSHA references this standard in 1910.94 by requiring that where flammable or explosive dust mixtures may be present, the abrasive blasting enclosure, the ducts, and the dust collector shall be constructed with loose panels or explosion venting areas, located on sides away from any occupied area, to provide for pressure relief in case of explosion.

Current edition

  • NFPA 68-2023 Standard on Explosion Protection by Deflagration Venting, 2023 Edition

Incorporation by reference

The following editions have been incorporated by reference (IBR) into the Code of Federal Regulations (CFR):

IBR approved forOverview of requirementsIBR approved edition
29 CFR 1910.94(a)(2)(iii)Employers must ensure that where flammable or explosive dust mixtures may be present, the construction of the equipment, including the exhaust system and all electric wiring, conforms to the requirements of American National Standard Installation of Blower and Exhaust Systems for Dust, Stock, and Vapor Removal or Conveying, Z33.1-1961 (NFPA 91-1961) and 1910 Subpart S. In addition, employers must ensure that where flammable or explosive dust mixtures may be present, the abrasive blasting enclosure, the ducts, and the dust collector are constructed with loose panels or explosion venting areas, located on sides away from any occupied area, to provide for pressure relief in case of explosion, following the principles set forth in the National Fire Protection Association Explosion Venting Guide, NFPA 68-1954.NFPA 68-1954 Guide for Explosion Venting.

How to purchase

Standards are available for purchase from the American National Standards Institute (ANSI), see webstore.ansi.org, and from the National Fire Protection Association (NFPA), see catalog.nfpa.org.

['Enforcement and Audits - OSHA', 'Industrial Hygiene']
['Enforcement and Audits - OSHA', 'Ventilation']
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