Pennsylvania Code › Title 34 - LABOR AND INDUSTRY › Part I - Department of Labor and Industry › Chapter 14a - STORAGE AND USE OF FLAMMABLE AND COMBUSTIBLE LIQUIDS › Subchapter B - PARTICULAR ESTABLISHMENTS AND USES › BULK PLANTS › Section 14a.104a - Vapor processing systems

Current through Register Vol. 54, No. 28, July 13, 2024
(a)
					 Vapor processing system components consisting of hose nozzle valves, blowers or
					 vacuum pumps, flame arresters or systems for prevention of flame propagation,
					 controls, and vapors processing equipment shall be individually approved for
					 use in a specified manner.
(b)
					 Dispensing devices used with a vapor processing system shall be approved.
					 Existing listed or labeled dispensing devices may be modified for use with
					 vapor processing systems provided they are "Listed by Report" as specified in
					 §
											14a.113a(b)
					 (relating to vapor recovery system).
(c) Means shall be provided in the vapor
					 return path from each dispensing outlet to prevent the discharge of vapors when
					 the hose nozzle valve is in its normal nondispensing position.
(d) Vapor processing systems employing
					 blower-assist shall not be used unless the system is designed to prevent flame
					 propagation through system piping, processing equipment, and tanks.
(e) If a component is likely to contain a
					 flammable vapor-air mixture under operating conditions, and can fail in a
					 manner to ignite the mixture, it shall be designed to withstand an internal
					 explosion without failure to the outside.
(f) Vapor processing equipment shall be
					 located outside of buildings at least ten feet from adjacent property lines
					 which can be built upon, except as provided for in subsection (g). Vapor
					 processing equipment shall be located a minimum of 20 feet from dispensing
					 devices. Processing equipment shall be protected against physical damage by the
					 provision of guard rails, curbs, or fencing.
(g) Where the required distance to adjacent
					 property lines which can be built upon as specified in subsection (f) cannot be
					 obtained, means shall be provided to protect vapor processing equipment against
					 fire exposure. Such means may include protective enclosures which extend at
					 least 18 inches above the equipment, constructed of fire resistant or
					 noncombustible materials, installation in below-grade spaces, or protection
					 with an approved water spray system. If protective enclosures or below-grade
					 spaces are used, positive means shall be provided to ventilate the volume
					 within the enclosure to prevent pocketing of flammable vapors. In no case shall
					 vapor processing equipment so protected be located within 5 feet of adjacent
					 property lines which can be built upon.
(h) Electrical equipment shall be in
					 accordance with the National Electrical Code.
(i) Vents on vapor processing systems shall
					 be not less than 12 feet above adjacent ground level, with outlets so directed
					 and located that flammable vapors will not accumulate or travel to an unsafe
					 location or enter buildings.
(j)
					 Combustion or open flame type devices shall not be installed in a classified
					 area. See the National Electrical Code.