Compressed Natural Gas (CNG) is natural gas that is formed from a compound which mostly methane and can be stored in high betekanan tube (200-250 bar). CNG is currently used as an alternative energy inisudah that was developed as a substitute for LPG fuel, Diesel, Kerosene and coal, which is used for boilers, ovens, burners, gas engines, and others.

CNG is natural gas properties which have a lighter weight than the air, so if there is a leak in the gas it will quickly evaporate upwards. This shows that the use of CNGlebih safer than fuel or LPG, besides the pure form of gas this gas is not derived from oil. The tubes used to store CNG in different vehicles with the tube used for vigas (LGV), karenaperbedaan pressure tubes used must be able to withstand pressures of up 200-250bar (Working Plasure). In addition, the price of CNG is more profitable than other fuels, including; combustion is more efficient, cleaner production machine that can reduce maintenance costs and reduce air pollution, in addition to the price of CNG is more competitive compared to other fuels