Bevel Pipe
A bevel pipe is manufactured by placing the spigot ring at an angle on the end of a full length of pipe, which permits greater pipe deflection than that possible with the standard joint. A bevel pipe has a long and a short side. A "full" bevel pipe has a difference between the long and short side of 1 inch per foot of pipe diameter. A "half" bevel pipe has a difference of 1/2 inch per foot of pipe diameter.

Deflection
Deflection tables are used to determine the recommended maximum joint opening for lined cylinder pipe (LCP) and embedded cylinder pipe (ECP) in each diameter for 20-foot laying lengths. The maximum recommended joint opening for layout purposes on unrestrained joints is shown in the deflection tables. In all cases, the joint can be opened an additional 1/2 inch beyond the recommendations in these tables without losing seal. All restrained joints, however, are limited to a maximum joint opening of 1/2 inch.

Horizontal and Vertical Curves

One common use for deflected deep joint, standard joint, and bevel pipe is to negotiate large-radius horizontal and vertical curves. Using the pipe in this way eliminates the need for elbow fittings. The project site must, in this case, have sufficient room to handle the long-radius curves. The deflection tables in the Engineering Manual indicate the curve radii and offsets possible with deep joints, standard joints and bevel joints of 20-foot or 16-foot nominal laying length.