PNG vs LPG

The full form of LPG is Liquefied Petroleum Gas & PNG is Piped Natural Gas. As the name itself says that LPG is supplied through cylinders & PNG through pipes. LPG is not natural gas but it is derived from natural gas processing.

PNG is better than LPG when it comes to delivery through pipes, cost and the fact that it produces slightly less CO² when burned. But when it comes to higher energy content and portability, LPG is better than PNG.

Differences between LPG and PNG

Common Properties		LPG		PNG
Supplied through		Cylinders		Pipelines
State of Matter		Liquid		Gas
Used in		Heating Appliances and vehicles		Cooking (Gas Stoves and Gas Geysers)
Cost		Expensive		Cheap
Weight with respect to air		Heavier		Lighter

Name       Properties	LPG (Propane)	Natural Gas (Methane)
Chemical Formula	C3H8	CH4
Energy Content: MJ/m3	93.2	38.7
Energy Content: MJ/kg	49.58	52.5
Boiling Temp: Cº	-42	-161.5
Flame Temp: Cº	1967	1950
Gas Volume: m3/kg	0.540	1.499
Specific Gravity	1.5219	0.5537
Density @15ºC: kg/m3	1.899	0.668
Appliances operate at   (in kilopascal)	2.75	1.1

 

 

    A 14.2kg subsidized domestic LPG cylinder costs Rs 700 (Period of 45 days). The same period required for PNG is 15 SCM (Standard Cubic Meters), which comes at a price of Rs 28/SCM, which gives a total of Rs 420 (including taxes).

Note: The above consumption analysis is based on my (family of 4 people) PNG meter reading and bills raised by MNGL. Period of analysis is 3 years.

    There is also a one time security deposit of Rs 6500 in case of PNG. In case of LPG, the deposit for 2 cylinders is around Rs 3000.

    Customers are not charged for laying of the pipeline network up to the appliance along with necessary fittings, pressure regulator, meter and conversion of LPG appliance to PNG.

Gallery

LPG Cylinders

 

PNG meter

PNG House’s main valve

Connection through window

PNG Valve near Gas Stove