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Home / Galleries / Richard L. Hearn Generating Station / Coal Chute, Roof & Exteriors
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Keep Door Closed

 

September 1, 2004

Flagrant violation of the rules...

Filed under:

door exit Richard L. Hearn Generating Station roof sign Toronto

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4 Comments

allied
Jun 10, 2005 at 11:17 am

It must be closed at all times to protect what? I can't quite read the last two words.

kendall
Jun 10, 2005 at 5:07 pm

... 'to protect gauge glass.'

robert
Dec 01, 2005 at 8:03 am

I guess sudden changes in air pressure and temperature would shatter the glass on these gauges...

William West
Feb 01, 2006 at 9:36 pm

"To protect the gauge glass"from thermal stress. The gauge glass was used to check the level of the boiler steam drum under a pressure of 2,000 psi.The glass was 2 inches in diameter and 1 inch thick and was bolted to a
steel column. If the glass cracked and blew out a very serious accident could result to any person in the area.

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