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Unformatted text preview: valves? INCIDENT DESCRIPTION
A release of material occurred from a ¾” drain valve on piping connected to an atmospheric storage tank.
How the valve opened was unknown. The incident was investigated; a theory was developed that melting
snow slid from the top of the tank and landed on the straight handle of a ¼ turn ball valve - and this caused
the valve to open. There were skeptics – and more than one! So, the investigation team carried a bucket of
snow to the top of the tank and let it slide in the direct...
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This note was uploaded on 04/19/2013 for the course SAFETY BEA 101 taught by Professor Ccps during the Spring '13 term at Chemnitz University of Technology.
- Spring '13