Help ensure compliance with critical requirements for safeguarding potentially dangerous exhaust systems from fires and explosions.

For well over a century, NFPA codes and standards have been addressing the inherent dangers that blower and exhaust systems can present to public safety. NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids, represents the most comprehensive requirements for designing, constructing, installing, testing, operating, and maintaining these systems.

This standard is a must-have resource to help improve safety and mitigate risks from fires and explosions in exhaust systems where vapors, gases, mists, and particulate solids are present in the airflow. The standard incorporates provisions on the application of exhaust systems to specific industries or operations from NFPA 1, Fire Code, NFPA 30, Flammable and Combustible Liquids Code, and many other codes and standards.

It is critical for design and fire protection engineers, safety and health professionals, industrial hygienists, and fire and building officials to know ignition risks of materials pneumatically conveyed through duct systems.