Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › SPECIALIZED OPERATIONS › Part U-2 - Hazardous Materials - Liquified Petroleum Gas › Section 296-307-41041 - Transferring of liquids

Current through Register Vol. 24-14, July 15, 2024
When transferring liquids, the employer must ensure
					 that:
(1) At least one attendant
				  remains close to the transfer connection from the time the connections are
				  first made until they are finally disconnected, during the transfer of the
				  product.
(2) Containers must be
				  filled or used only upon authorization of the owner.
(3) Containers manufactured according to DOT
				  specifications authorized by DOT as a "single trip" or "nonrefillable
				  container" must not be refilled or reused in LP-gas service.
(4) Gas or liquid must not be vented to the
				  atmosphere to assist in transferring contents of one container to another,
				  except as provided in WAC
				  296-307-42509(4).
				  A listed pump may use LP-gas in the vapor phase as a source of energy. The gas
				  may be vented to the atmosphere at a rate not to exceed that from a No. 31
				  drill size opening, if venting and liquid transfer are located at least fifty
				  feet from the nearest important building.
(5) Filling fuel containers for industrial
				  trucks or motor vehicles from industrial bulk storage containers must be
				  performed at least ten feet from the nearest important masonry-walled building
				  or at least twenty-five feet from the nearest important building or other
				  construction and always at least twenty-five feet from any building
				  opening.
(6) Filling portable
				  containers, containers mounted on skids, fuel containers on farm tractors, or
				  similar applications, from storage containers used in domestic or commercial
				  service, must be performed at least fifty feet from the nearest important
				  building.
(7) The filling
				  connection and the vent from the liquid level gauges in containers, filled at
				  point of installation, must be at least ten feet in any direction from air
				  openings into sealed combustion system appliances or mechanical ventilation air
				  intakes.
(8) Fuel supply containers
				  must be gauged and charged only in the open air or in buildings especially
				  provided for that purpose.
(9)
				  Marketers and users must exercise precaution to ensure that only those gases
				  for which the system is designed, examined, and listed, are employed in its
				  operation, particularly with regard to pressures.
(10) Pumps or compressors must be designed
				  for use with LP-gas. When compressors are used they must normally take suction
				  from the vapor space of the container being filled and discharge to the vapor
				  space of the container being emptied.
(11) Pumping systems, when equipped with a
				  positive displacement pump, must include a recirculating device that limits the
				  differential pressure on the pump under normal operating conditions to the
				  maximum differential pressure rating of the pump. The discharge of the pumping
				  system must be protected so that pressure is a maximum of 350 psig. If a
				  recirculation system discharges into the supply tank and contains a manual
				  shut-off valve, an adequate secondary safety recirculation system must be
				  incorporated that has no means of rendering it inoperative. Manual shut-off
				  valves in recirculation systems must be kept open except during an emergency or
				  when repairs are being made to the system.
(12) When necessary, unloading piping or
				  hoses must have suitable bleeder valves for relieving pressure before
				  disconnection.
(13) Agricultural
				  air moving equipment, including crop dryers, must be shut down when supply
				  containers are filling unless the air intakes and sources of ignition on the
				  equipment are located fifty feet or more from the container.
(14) Agricultural equipment employing open
				  flames or equipment with integral containers, such as flame cultivators, weed
				  burners, and tractors, must be shut down during refueling.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-41041,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-41041,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and[49.17.]060 .
						96-22-048, § 296-306A-41041, filed 10/31/96, effective
						12/1/96.