What does the red, white, and blue markings mean on a constant spring support?

November 23, 2021

Red, White and Blue Marks:

All constants are shipped with at least 3 color-coded rivets (red, white and blue).
Red: operating (HOT) position
White: installation (COLD) position
Blue: over travel (MAX AVAILABLE) position

Below are sketches of one direction vertical travel:

Installation maintenance rivets one direction

 

 

Below is a sketch of dual direction vertical travel:

 

Rivets two directions

What position should a variable spring be adjusted to before the pipeline is put back into service after a shutdown?

February 1, 2011

Thevariable spring should be restored to its original installed (cold) position.

Variable Spring with White Diamond Indicating Cold Position
Variable Spring with White Diamond Indicating Cold Position


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