I have an old toyota corolla e 100 sedan. A CNG cylinder is installed in my car because here it is cheaper than octane. I was thinking about setting up a good audio system in my car, which includes a 12 inch or mayb an 18 inch sub woofer. The cng cylinder is installed in the trunk. If I install a sub then it has to be put in the trunk too. So I was wondering would it be a problem for the cylinder? Like when I use really high volume with high bass bits? Will the sub woofer vibration cause any risk for the cylinder? TIA.
Fuel needs air to burn/explode/ignite
Acoustic vibration will have no impact on a CNG tank whose integrity isn't compromised (i.e. doesn't leak).
Even if the tank leaks gas into its surroundings, there needs to be a spark or naked flame to result in an explosion. Acoustic vibration alone won't be enough to cause ignition.
If there was even a remote possibility of igniting an air-fuel mixture with acoustic vibrations it would have been explored as an alternative to (comparatively complex) spark-ignition systems.
That said, there is more than one way a CNG tank can go bang. Consider the following:
- electrical hazards from installing the subwoofer (electrical shorts, heating effect of high current)
- mechanical integrity of the tank (leaks, corrosion)
- heat in small enclosures