Pennsylvania Statutes Title 52 P.S. Mines and Mining § 690-262. Transportation of oxygen and gas

(a) General rule.--Transportation of oxygen and gas tanks or cylinders shall be permitted on self-propelled machinery or belt conveyors specially equipped for safe holding of the containers in transportation. In no instance shall such transportation be permitted in conjunction with any mantrip.

(b) Marking of empty tanks and cylinders.--Empty oxygen and gas tanks or cylinders shall be marked “empty” and shall be removed from the mine promptly in proper containers. The valve protection caps shall be placed on all tanks or cylinders for which caps are provided when not in use and when being transported. No oxygen and gas tanks or cylinders shall be transported with the hoses and gauges attached.

(c) Identification of tanks and cylinders.--All oxygen and gas tanks or cylinders shall be clearly identified.