Page 341 - Facility Piping Systems Handbook for Industrial, Commercial, and Healthcare Facilities
P. 341
SITE UTILITY SYSTEMS
SITE UTILITY SYSTEMS 6.63
FIGURE 6.33 Rigid pipe bedding methods. (Courtesy: ASPE Data Book.)
Note: 1 in = 25 mm.
The structural behavior of flexible pipe is not the same as for rigid pipe. Flexible pipe
does not have the structural strength and stiffness to resist traffic and backfill loads with-
out support from surrounding embedment. Being flexible, the pipe deforms (or deflects)
under load. This generally takes the form of radial elongation. This elongation structurally
stresses the surrounding embedment material. The resistance to this stress is required for
long-term support for the pipe. In order to achieve long-term resistance, proper placement
of acceptable material around the pipe is required.
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