Letter Re: Differences Between Combustible Gasses
HJL, The difference between CNG and piped-in gas to your home is simply pressure. The gas in my house is at 7 psi and if your thumb is big enough you can stop the flow. CNG could be as high as 3000 psi, and you find it in tanks for vehicles that burn natural gas and filling stations for natural gas burning vehicles. The difference between butane, propane, and natural gas is British Thermal Units (btu) generated by a cubic foot of each substance. From high school, a btu is the amount of energy it takes to raise one pound …