Issue 15 and Volume 61.

QUESTIONS AND ANSWERS Readers of FIRE AND WATER ENGINEERING are invited to send in questions which will be answered in the order in which they are received. Refrigerator Plant Explosions. To the Editor: In a recent issue of your journal I read of an “explosion” of a refrigerating plant in Brooklyn. Is ammonia gas explosive? If not, why did the explosion occur? What precautions would you suggest for preventing such occurrences in refrigerating plants? Respectfully’ yours, W. A. Philadelphia, Pa., March 30, 1917. (Answer: Ammonia gas charged with vapor- ized oil usually employed in ammonia compressors is explosive when mixed with air. Refrigerating plants should, therefore, be located in rooms cut of! in a standard manner fiom boiler rooms, electric generating plants, etc., or rooms in which any open fires or lights may be present. No lighting, other than incandescent electric lamps, and no stoves, forges, torches, nor other open…

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