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Elbows

Elbows can be used where it is impractical to make long radius curves with deflected straight or bevel pipe. Dimensions for elbows of standard laying length and radius are found in the Price Brothers Concrete Pressure Pipe Engineering Manual. However, as standard practice, Price Brothers Company can fabricate elbows to other dimensions. Joint openings and bevel pipe or bevel adapters (see "Bevels and Deflection") may be used in conjunction with the elbows to adjust the specified angle.

The approximate laying lengths for elbows of intermediate deflection can be obtained by interpolation of the standard elbow laying length tables found in the Engineering Manual.

Prefabricated, large diameter elbows can be supplied but may be limited by shipping dimensions or weight. When these limitations occur, the required deflection may be obtained by the use of two or three elbows with smaller deflections.

Rotation of Elbows and Combined Bends
By rotating an elbow, it is possible to obtain a simultaneous horizontal and vertical deflection known as a combined bend.

Formulas are given in the Engineering Manual for computing the manufactured angle of elbows in terms of their combined horizontal and vertical deflections, and for determining their degree of rotation required in order to obtain required deflections. The latter formula can also be applied to the location of lugs on elbow joints.