scope:

(footnote *)

This standard provides minimum requirements for the design, construction, installation, operation, testing, and maintenance of exhaust systems for air conveying of materials except as modified or amplified by other applicable NFPA standards.

This standard outlines requirements to obtain reasonable safety. Where unusual hazards are encountered, the authority having jurisdiction shall be permitted to require additional safeguards or modify the requirements of this standard, provided equivalent safety is ensured.

Purpose.

The purpose of this standard is to eliminate or reduce known fire and explosion hazards inherent in the use of exhaust systems and to prevent them from becoming a means for spreading fire.

The design and installation of exhaust systems shall be the responsibility of persons having a knowledge of these systems. Maintenance and operations shall be performed by persons having exhaust system experience.

Footnote * - NOTICE: An asterisk (*) following the number or letter designating a paragraph indicates explanatory material on that paragraph in Appendix A.

Information on referenced publications can be found in Chapter 8 and Appendix B.