Page 191 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook

SYSTEM DESIGN 189
Misalignment and Deflection 2 of 2
If it is desired to have both deflection and linear movement available, then the system should have sufficient flexible joints to accommodate the requirement.
Flexible couplings are also useful in laying out curved piping systems.
L
R=L
(2) (Sin—)
T
2
L = (2) (R) (Sin—) 2
N= T
R = Radius of curve L = Pipe length
Flexible Couplings (Typical)
= Deflection from centerline, in degrees, for each coupling (see table)
N = Number of flexible couplings needed T = Total deflection, in degrees, required
R