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Why should a filled scuba tank never be left in a hot car for an extended period of time?
Wiki User
∙ 12y ago
Worst case scenario, the cylinder threads fail, shooting the valve off. If the cylinder was laying on its side, it would turn into a rocket. It would have enough force to EASILY go through a concrete wall, and start going through another (thank you Mythbusters!).
Keep in mind, an 80 cu ft. Scuba cylinder filled to 3,000 psi of compressed air, has 1.3 MILLION foot-pounds of kinetic energy. I, for one, do not want to be around it when it is all released at once. A: Far more likely, the Burst Disk would rupture and make a hell of a noise. Burst Disks are small copper-foil (or similar) sheets that are intended to break and vent air when and if the tank over-pressurizes. They're noisy but harmless. =====
Ah, a very good point. I was thinking worst case scenario ... old tank that didn't have the burst disk. I should mention that for this to happen, the scuba tank would be well out of certification (both annual visual inspection and five-year hydrostatic testing). Most modern scuba tanks do have these burst disks that are designed just for this purpose. In fact, it's difficult to get the parts to service the older style scuba tanks anymore.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoCharle's law relates heat to pressure. If there was a house fire and scuba tanks were in it, would there be an immediate threat to the firefighters? When scuba tanks are heated the pressure rises. Would the tanks explode if they were full? The answer is "No." In the valve of the tank there is a safety plug that is designed to split when the pressure climbs near the hydrostatic test pressure. If a 3000 psi tank were heated to the point the pressure climbed to 5000 psi (about 400 degrees F) the safety plug would split and the air would quickly leave the tank. Contrary to myth, there is no danger of tanks getting that hot in the trunk or in the interior of a car.
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