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What Is Natural Gas, Png, Cng & Lng?

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  • Natural gas as its NAME indicates is a Gaseous fuel, consisting of 87-92% of Methane with a small percentage of other higher hydrocarbons. PNG, CNG & LNG are different forms of Natural gas under varied temperature & pressure.
  • Piped Natural Gas(PNG) is GENERALLY under atmospheric temperatures but the pressure can up to as high as 90 Kg/cm2 in transmission lines and limited to less than 24 Kg/cm2 in City Gas grids due to risk involved in movement of high pressure gas inside CROWDED cities/towns .
  • COMPRESSED Natural Gas (CNG) means natural gas used as fuel for vehicles, typically compressed to the pressure ranging from 200 to 250 kg/cm2 in the gaseous state It is used pre-dominantly for automotive purpose as the energy requirement for running a car (for 150-200 km) can be packed in a container of size, which can fit in to the luggage compartment or boot space when pressurized gas volume reduces by nearly 300 times.There are few instances of CNG being used for industrial purposes for shipping desired quantities through cylinder cascades .However in such cases pressure reduction at the end use is inevitable. (Refer OISD-179 for Safety Requirements for Compression, storage & refueling stations for CNG in Automotive sector)
  • LNG (Liquefied Natural Gas)is liquid FORM of Natural gas, generally intended for transportation of large volumes through ships, where cross country pipelines are not feasible. There will be high degree of economy in transportation logistics due to large scale of operations involved.


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