§ 13.52. Location.

 (a)  Vaporizers shall be located with respect to adjacent tanks, cylinders and buildings in accordance with safe practices developed in the industry.

 (b)  The use of vaporizers in buildings where persons are employed, other than attendants, is prohibited except in buildings used exclusively in gas manufacturing and distribution.

 (c)  Where vaporizers are installed in buildings, rooms, housings, sheds or lean-tos used exclusively for gas manufacturing or distribution, such structures shall be of noncombustible construction or equivalent and well ventilated near the floor line and roof.

 (d)  Pressure regulating and pressure reducing equipment, if located close to a direct fired vaporizer, shall be separated from the open flame by a substantially airtight noncombustible partition or partitions.