1. To maintain pipeline stationing, pipe should be
installed with the normal interior joint space of 25 mm. Minor
corrections in stationing can be made by increasing joint space to a
maximum of 50 mm or by decreasing to a minimum of 20 mm.
2. Standard joints are deflected to form curves to span
angle points or to correct alignment and grade. Joint
deflections is accomplished by increasing the interior joint space
on one side of the pipe and decreasing the interior joint space on the
opposite side. The deflection of a joint in millimeters is the
difference between the widest and narrowest interior joint space.
3. Pipe with beveled spigots are furnished for
changes in alignment or grade greater than can be accommodated with
deflected joints. Bevels are made by attaching the spigot to the
steel cylinder at the desired angle during manufacture of the pipe.