Safety Comes First when it comes to CNG Tanks! Compressed natural gas is very safe due to two important factors: the physical properties of natural gas itself and the CNG fuel system that is designed and built according to stringent quality standards. The physical properties of CNG make CNG safer to use than gasoline. For instance, CNG has a limited range of flammability compared to gasoline which can catch fire and burn easily. In order for CNG to burn, CNG needs between 5 to 15% of air in the fuel mixture or else the CNG will simply not be able to burn.
CNG Cylinders in the USA today are rated at 3,600 psi working pressure and have a life span from the date of manufacturer of 20 years. All CNG tanks and cylinders offered by CNG United are DOT certified and can also meet certification requirements in other Countries. There are currently 4 different types of CNG tanks available on the market today. A new type 5 CNG tank is also coming to market very soon as the new technology becomes available. The 4 types of CNG that are available now include:
Compressed Natural Gas Tanks
Dot Certified CNG Tanks
- Type 1 CNG Tanks – Type 1 CNG tanks are extremely durable and are made of solid steel. Type 1 CNG tanks are great to be placed under a vehicle and are the least expensive of all the types of CNG tanks. They are how every very heavy. They range from 2 to 13.5 gasoline gallon equivalent.
- Type 2 CNG Tanks – Type 2 CNG tanks are very similar to type 1 CNG tanks; they are also made of steel, but type 2 tanks are lighter as a result of the use of a thinner tank wall and are made stronger by being wrapped with carbon fiber that is then covered with a resin glaze. The typical type 2 CNG tanks range in size from 8 to 17 gasoline gallon equivalent (“gge”).
- Type 3 CNG Tanks – Type 3 CNG tanks are made of an aluminum bladder that are wrapped with a carbon fiber skin that is dipped in resin. Type 3 CNG tanks are excellent for placement inside vehicles where the overall weight of the CNG tank will matter for vehicle performance. The available sizes range from 2 gge to 30 gge (gasoline gallon equivalent).
- Type 4 CNG Tanks – Type 4 CNG tanks have a plastic bladder and are wrapped with carbon fiber and covered with a resin glaze; As a result, type 4 CNG tanks are extremely light and due to the very thin wall, type 4 CNG tanks can contain more capacity compared to other types of CNG tanks that have similar dimensions. For these reasons, and because lighter tanks translates to better overall vehicle mileage due to less load to carry in the vehicle, type 4 CNG tanks are the most expensive and are typically ranged in size from 17.5 gge to 53 gge.