The theory was proven snow falling from the top of

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Unformatted text preview: ion of the valve. The theory was proven! - Snow falling from the top of the tank can open a ¾”, “straight handle” ball valve. In a similar situation at another facility, a mass of ice broke away from a structure and landed on a similar ¼ turn straight handle condenser drain valve. Again, release of material followed. ACTIONS TAKEN These incidents prompted a review of the plant’s piping and valve installation practices. Modifications were made, drain valves were installed in the vertical position, lever-style (straight) handles must be installed such that the valve is opened by pulling up on...
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