A jacketed fuel injection pipe (also known as double walled, twin walled or sheathed fuel injection pipe) is a special type of
fuel injection
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines.
All c ...
pipe fitted to
diesel engine
The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
s.
The pipe incorporates an outer jacket that shrouds the inner high pressure pipe. This jacket is usually metallic in construction and can either be a thin walled tube or convoluted hose. In the event of a burst in the injection pipe the leaking fuel will be collected by the jacket and piped away safely to an alarm device to notify operators of a potential problem.
Jacket fuel lines are found predominantly in marine applications. Adoption in power generation is becoming more common.
Legislation
In 1994 the
International Maritime Organization
The International Maritime Organization (IMO; ; ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations responsible for regulating maritime transport. The IMO was established following agreement at a ...
required all ships subject to SOLAS to be fitted with jacketed fuel lines. Existing vessels and new builds constructed before 1998 were required to comply by 1 July 2003.
Dispensation was given to engines smaller than 375 kW (500 hp) providing they were fitted in a suitable enclosure. In 2006 the IMO relaxed the regulation by applying it only to ships constructed on or after 1 February 1992, but without engine power limitation.
References
{{Reflist
External links
British Marine - Fire In The Engine Room
Diesel engine components
Fuel injection systems