UL 80079-37 Ed. 1-2021

Explosive Atmospheres - Part 37: Non-Electrical Equipment for Explosive Atmospheres - Non Electrical Type of Protection Constructional Safety - Published Date: September 10, 2025

1 Scope This  standard  part of ISO/IEC 80079  specifies the requirements for the design and construction of non-electrical equipment, intended for use in explosive atmospheres, protected by the types of protection constructional safety “c”, control of ignition source “b” and liquid immersion “k”. This  standard  part of ISO/IEC 80079  supplements and modifies the requirements in ISO  UL  80079-36. Where a requirement of this standard conflicts with the requirement of ISO  UL  80079-36 the requirement of this standard takes precedence. Types of Protection “c”, “k” and “b” are not applicable for Group I, EPL Ma  without additional protective precautions  . The types of ignition protection described in the standard can be used either on their own or in combination with each other to meet the requirements for equipment of  Group I,  Group II, and Group III depending on the ignition hazard assessment in ISO  UL  80079-36. Where references are made to IEC and ISO standards, the referenced requirements found in these standards shall apply as modified by any applicable US National Differences for that standard (see clause 2).  NOTE In the US, the authority having jurisdiction for underground mines is the Mine Safety and Health Administration (MSHA) of the federal government. There are additional regulations beyond the requirements detailed here that will also apply.