ISA 60079-31 : 2015

ANSI/ISA-60079-31 (12.10.03)-2015, Explosive Atmospheres – Part 31: Equipment Dust Ignition Protection by Enclosure "t" (Edition 2), focuses on electrical equipment designed for explosive dust atmospheres. This standard provides detailed requirements for how equipment enclosures must be constructed and tested to prevent dust ignition, including limits on surface temperatures and protection against dust ingress. It covers three levels of protection: ta, tb and tc, each with specific design, testing and marking rules depending on the risk level and type of dust environment. It also addresses aspects like joints, cable glands and protective devices inside the enclosure. This standard offers a comprehensive framework for safety-focused design and certification of electrical equipment used in dusty, potentially explosive environments.