Liquefied Petroleum Gas
Avoid inhaling Liquefied Petroleum Gas (LPG) or occupying confined areas containing LPG. LPG (propane) is heavier than air. The heavier gas can displace or push fresh air out of an area. In large quantities, propane can displace enough oxygen to make the surrounding air unfit to breathe and possibly cause illness. If a person breathes propane gas or air that lacks oxygen due to presence of propane gas, headache, dizziness, and weakness in the extremities can occur. In severe cases, prolonged breathing of propane-fouled air can cause suffocation. In the event of illness from inhaling propane gas, move victim immediately to fresh air and contact a physician or medical emergency personnel for artificial respiration or other required treatment.
DO NOT needlessly vent propane fuel during service, and do not open the 80 percent stop-fill valve while a vehicle is inside a building. When servicing fuel system, follow recommended procedures to shut off fuel tanks and run engine out of fuel before disconnecting fuel system components. See FUEL SYSTEM PRESSURE RELEASE in REMOVAL, OVERHAUL & INSTALLATION - F150 PICKUP - BI-FUEL article. If fuel tank(s) are being serviced, have fuel evacuated by trained personnel at a local propane fuel station. LPG fuel vaporizes at normal barometric pressure at temperatures above -44°F (-42°C), and expands to 270 times its volume as a liquid. Unnecessary venting of LPG fuel can create fire and health hazards which could cause personal injury or death. Be alert for situations that may cause LPG fuel system to vent fuel. These include extremely hot days, parking near a space heater, or hoisting a vehicle up near a ceiling heater. Release of LPG fuel in a confined area through pressure relief valve could occur. Release of LPG fuel in a confined area could result in an accumulation of flammable vapors. If fuel is vented near a heat source, a fire or explosion could occur.
DO NOT use paint drying ovens for LPG fueled vehicles. Heat from paint drying ovens will increase pressure in fuel tanks and could cause venting of LPG fuel vapor into oven and result in a fire from heat or sparks in electrical equipment. If fuel is confined inside an oven, an explosion may occur. If a confined area, such as a lubrication pit, has been subjected to LPG gas, the area should be inspected for adequate oxygen levels by a local health department before being entered, or personal injury or death may occur. LPG fuel system pressure must be relieved before any component can be removed. Fuel tanks must be evacuated prior to tank removal. Removal of components without pressure relief or tank evacuation can cause LPG fuel to escape and cause injury or death.