UL 60079-30-1
Explosive Atmospheres – Part 30-1: Electrical Resistance Trace Heating – General and Testing Requirements
standard by Underwriters Laboratories, 05/05/2017
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UL 60079-29-2
Explosive Atmospheres – Part 29-2: Gas Detectors – Selection, Installation, Use and Maintenance of Detectors for Flammable Gases and Oxygen
standard by Underwriters Laboratories, 10/15/2018
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