NFPA 77-2019 PDF Download

NFPA 77-2019 is a recommended practice that aims to mitigate static electricity hazards and prevent the ignition of flammable vapors, dust, and particulates. It provides important information on evaluating and controlling static electric hazards in various industries such as chemical processing, petroleum refining, printing, and calendaring.

The standard offers guidance on eliminating static electric charges through bonding and grounding. It also provides instructions on how to manage static electricity in the presence of ignitable dusts or vapors, as well as controlling the flow rates and velocities of liquids during transfer.

The 2019 edition of NFPA 77 has been updated to reflect current editions of referenced documents and the latest safety knowledge. Changes have been made to the definitions of terms like "combustible dust" and "grounding," aligning them with the specific terminology used in NFPA 77. Additionally, the characterization of low, medium, and high resistivity powders in Chapter 15 has been revised to align with international standards.