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You proudly drive home your new CNG powered Obamacar, with a 200 atmosphere pressure bomb compressed methane tank. Over the next few years, you repeatedly cycle the pressure, filling and emptying the and temperature, with temperatures ranging between -30F and 120F.
Good thing that this sort of mechanical stress doesn’t affect the integrity of the metal tank, because you certainly wouldn’t want the neighborhood to explode when you get in an accident.
A number of people here are conflating CNG and LPG. Obama is talking about CNG, which requires 100X as much pressure as LPG.
LPG is safe, CNG isn’t – unless you have a tank with extremely thick walls – which is prohibitively expensive and heavy.
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