![]() ![]() With these points in place, the pipe will grow toward the expansion joint from each anchor, compressing the joint. An anchored piece of equipment is considered a fixed point. The polyvinyl chloride (PVC) pipe thermal expansion coefficient is more than three times that of stainless steel.Įven pipe runs of only 30 to 40 feet can be a problem if an expansion joint is not used.įor expansion joints to perform properly-compress when the pipe grows-they must be located between two fixed points or anchors. Carbon steel pipe, with a coefficient of thermal expansion of 6.4 x10-6 inches per inches-Fahrenheit (in/in-F), grows almost 2 inches per hundred feet for a 260 F temperature rise, and T-304 stainless steel grows about one-and-a-half times this rate. ![]() Thermal growth of pipe materials will cause serious problems if ignored or disregarded. ![]()
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