What is the coefficient of expansion for steel conduit/EMT/IMC and why is this significant?

The coefficient of expansion for steel conduit/EMT is 6.5×10-6 in./in./°F. This is significant as it relates to whether or not expansion fittings would be required in a particular application. Expansion fittings are installed where significant temperature differentials are anticipated

The Table also shows the length changes for steel conduit at each temperature differential. This will help determine the need for expansion fittings. For information about the use of expansion fittings, contact your fittings supplier.

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