U.S. Department of Labor Mine Safety and Health Administration Protecting Miners' Safety and Health Since 1978

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Exhaust gas cooling efficiency test.

(a) Test procedures. (1) Follow the procedures specified in § 7.101(a).

(2) Install a temperature measuring device to measure the exhaust gas temperature at discharge from the exhaust conditioner. The temperature measuring device shall be accurate to ± 4 deg.F (± 2 deg.C).

(3) Determine the exhaust gas temperature at discharge from the exhaust conditioner before the exhaust gas is diluted with air.

(b) Acceptable performance.

(1) The exhaust gas temperature at discharge from a wet exhaust conditioner before the exhaust gas is diluted with air shall not exceed 170 deg.F (76 deg.C).

(2) The exhaust gas temperature at discharge from a dry exhaust conditioner before the gas is diluted with air shall not exceed 302 deg.F (150 deg.C).