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inverted siphon

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cvg

Civil/Environmental
Dec 16, 1999
6,868
We are designing a storm drain which will cross the TransCanada Pipeline right-of-way and are considering an inverted siphon under the existing natural gas transmission lines to avoid a costly relocation. There is some concern regarding possible freezing of the siphon. Anybody with experience and/or know a solution to prevent the freezing?
 
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If the storm drain and/or the siphon freezes will not the surface streams feeding them also freeze? What are the consequences of that? What is the depth of frost penetration in your area ? What are the annual surface temperature variations at your altitude ?

good luck
 
Is there a constant flow into the Siphon?
1- Place the siphon sufficiently deep to prevent freezing.
2- Make sure you size your siphon pipe is smaller than the main trunk to promote pressure flow and higher velocities.
3- Other than that you can use a DIP in a casing and connect defrosting wires to the pipes.

 
The project is in southern Saskatchewan
 
Provide catch basins at one or both ends of the siphon and have a plan to do regular cleaning of the basins as well as the pipe.
 
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