Rail Tank Car Collapse (Must Watch)

Be careful when you design equipment for steam out. After steam out operation, obviously temperature would drop and steam would condense and vacuum could kick in if the vents are not sized for air ingress to prevent vacuum. See the video below….

This may be worth circulating to all engineers showing the folly of poor design and/or incorrect operating procedures. Apparently the rail car had been steamed out and was still hot inside when it started to rain. The tank had a vent designed to release pressure, not for a vacuum. Also the design of the tank was to operate at pressure and had no vacuum support rings on it. The collapse occurred very quickly. I hope the video works.

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