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Lab Natural Gas Serrated Hose Nozzle; Hazardous Zone

Question asked by j_w_hines on Aug 20, 2020
Latest reply on Aug 20, 2020 by faizal_sharin

For a lab with a serrated hoze nozzle and valve for natural gas used in heating small burners, is this a hazardous zone and if so is there a hazardous zone diagram?  NFPA 497 offers some help, but not specific to this. The lab bench has an electric outlet, so clearance is the question.