As with other thermoplastic materials, consideration must be given to the effects of thermal expansion and contraction during the design and installation of the system. The coefficient of linear expansion for Harvel Clear pipe is 4.1 x 10-5 in./in./°F. The rate of expansion or contraction can be calculated as follows:
ΔL = 12 yL (T) where:
ΔL = expansion or contraction in inches
y = 4.1 x 10-5 (coefficient of linear expansion)
L = length of piping run in feet
T = temperature change °F
(T max. - T@ installation)
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