Section R. 408.11292 - Stationary acetylene generatorsRule 1292.
(1) An acetylene generator shall be installed level and in a manner not to place a strain on the generator or its connections. A generator shall be electrically grounded.(2) A generator shall be located where water will not freeze. Heating shall be by steam, hot water, or other indirect means. Open flames, fire, or other sources of ignition shall not be permitted inside a generator house, room, or in any enclosure communicating with them. Sodium chloride or other corrosive chemicals shall not be used for protection against freezing.(3) A water supply line to an acetylene generator with a noncontinuous connection shall terminate not less than 2 inches (5.08 centimeters) above the fill opening so that the water can be observed as it enters the generator. A supply line with a continuous connection shall be used only when the generator is provided an open overflow or an automatic water shutoff which will prevent overfilling the generator.(4) An acetylene generator shall discharge only through an open connection into a vented outdoor receptacle or residue pit.(5) Each generator shall be provided with a vent pipe of galvanized iron or steel. The pipe shall be secured to the building without a trap and shall be installed so that condensation will drain back to the generator. The pipe shall carry to outside the building and shall terminate in a hood or bend not less than 12 feet from the ground and 3 feet (.91 meters) from combustible construction, away from a window or other opening in a building and any source of ignition, and shall be constructed so that rain, snow, insects, or birds cannot obstruct the opening. The vent pipes from several generators shall not be interconnected, but shall lead outside separately.Mich. Admin. Code R. 408.11292