page_title: Autogas
section_title: Hoses, pipes and fittings
hierarchical_section_title: Autogas / System components / Hoses, pipes and fittings
caption_attribution_description: Autogas lines and fittings
context_page_description: Autogas is the common name for liquefied petroleum gas when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane.
  Autogas is widely used as a "green" fuel, as its use reduces CO
  2 exhaust emissions by around 15% compared to petrol. One litre of petrol produces 2.3 kg of CO
  2 when burnt, whereas the equivalent amount of autogas produces only 1.5 * 1.33 = 2 kg of CO
  2 when burnt. CO emissions are 30% lower, compared to petrol and NO
  x by 50%. It has an octane rating that is between 90 and 110 and an energy content that is between 25.5 megajoules per litre and 28.7 megajoules per litre depending upon the actual fuel composition.
  Autogas is the third most popular automotive fuel in the world, with approximately 16 million of 600 million passenger cars powered using the fuel, representing less than 3% of the total market share. Approximately half of all autogas-fueled passenger vehicles are in the five largest markets: Turkey, South Korea, Poland, Italy, and Australia.
context_section_description: The hose between the filler and tank(s) is called the fill hose or fill line. The hose or pipe between the tank(s) and the converter is called the service line. These both carry liquid under pressure.
  The flexible hose between the converter and mixer is called the vapour hose or vapour line. This line carries vapour at low pressure and has a much larger diameter to suit.
  Where the tank valves are located inside an enclosed space such as the boot of a sedan, a plastic containment hose is used to provide a gas-tight seal between the gas components and the inside of the vehicle.
  Liquid hoses for LPG are specifically designed and rated for the pressures that exist in LPG systems, and are made from materials designed to be compatible with the fuel. Some hoses are made with crimped fittings, while others are made using re-usable fittings that are pressed or screwed onto the end of the hose.
  Rigid sections of liquid line are usually made using copper tubing, although in some applications, steel pipes are used instead. The ends of the pipes are always double-flared and fitted with flare nuts to secure them to the fittings.
  Liquid line fittings are mostly made from brass. The fittings typically adapt from a thread in a component, such as a BSP or NPT threaded hole on a tank, to an SAE flare fitting to suit the ends of pipes or hoses.
caption: Gas lines and fittings. Containment hose, liquid hose, copper pipe with flared end plus brass elbows and T fitting
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