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Buried Steel Pipe Radius of Curvature

Buried Steel Pipe Radius of Curvature

Buried Steel Pipe Radius of Curvature

(OP)
I am installing a 42" welded steel water main. The pipe is epoxy coated with 0.500" wall thickness. The trench will fit the terrain with 1500 meter circular vertical curves. If I dig the trench to this design, will the pipe conform to the curve when placed in the trench.
I have googled trying to find a "rule of thumb" minimum radius for this pipe to no avail. Browsing this forum I am impressed with the knowledge and expierence dislayed and would appreciate any help or comments.

Don Hayter
H&M Excavating

RE: Buried Steel Pipe Radius of Curvature

One double joint 12.8 +/- length should deflect approximately 2 degrees under its own weight when one end is held fixed, so yes, with a 1500 m radius, you only need about 1/2 degree of deflection/double joint.  BTW if it is a 1500 m Diameter circle, you will need 1 degree of deflection/double joint to conform to that profile and you will get 2, so you're OK either way.

From "BigInch's Extremely simple theory of everything."

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