ISO 11439

With rising fuel prices, several countries are changing to alternative fuel with a lot of focus on Natural Gas.
Today there are over 4 million Natural Gas Vehicles (NGV) on the roads world-wide (while the number of Hydrogen powered vehicles remain extremely low). For both Natural Gas Vehicle, if the fuel is in gas form then the container must be able to withstand highpressure along with other safety requirements. Many countries accepts ISO 11439 approved cylinders to be used in the vehicle. You can find more information about ISO 11439 on this web site.
(some Hydrogen cylinders are also following requirements in this standard)