I.P.S. Pressure/Irrigation (P.I.P) Installation Guide - JM Eagle

PIPE SIZE
(inches)
SDR 51 SDR 41 SDR 35 SDR 32.5
6 14.87 18.70 21.36 22.92
8 35.53 43.24 49.80 53.46
10 68.64 85.21 98.36 105.51
12 119.80 145.81 168.96 181.31
Table 2B (Irrigation Pipe)
NOTICE: Mechanical means should not be employed to accomplish these
radii. It is the intent that the workers should accomplish this manually in
the trench. ON 1.5-inch to 12-inch PIPE, THE CURVE SHOULD BE AC-
COMPLISHED BY BENDING THE PIPE RATHER THAN BY DEFLECTING
THE JOINTS. THERE SHALL BE NO DEFLECTION IN THE JOINTS UPON
COMPLETION TO AVOID OVER-STRESSING THE BELL AND PREVENT
POSSIBLE BREAKAGE AND/OR LEAKS.
To avoid deflecting the joints while achieving curvature, it is recommended
that the joints be sufficiently braced or backfilled and compacted to
keep them stationary. Abrupt changes in direction may be accomplished
with fittings.
2.2.2 14-inch and Larger Pipe
Since the moment of inertia of Pressure and Irrigation Pipe is high, attempting
to curve the pipe is extremely difficult. JM Eagle’s recommendation for
14-inch and larger pipe is that the angular deflection at the joint is a maximum
of 1.5 degrees. This will produce an offset in a 20 foot section of approximately
6.25 inches. Joint deflection is achieved after the joint is assembled
in straight alignment and to the reference mark. The bell should be braced
in order to allow the free end to move laterally under steady pressure using
a pry bar or other suitable means. Care should be taken not to exceed the
maximum deflection allowed or damage the pipe with the machinery used.
The line may be assembled above ground, in a straight line then offset when
laid in the trench, if necessary. Abrupt changes in direction shall be accomplished
with fittings.
IRRIGATION & I.P.S. PRESSURE INSTALLATION GUIDE
15