Specifies the coefficient of thermal expansion of the plate material of the tank. Values are listed in engineering handbooks or the appropriate section of the API 650, App P. If this value is left blank, the software assumes a value of zero.
Typical units (depending on your unit system):
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in/in/ºF x 1.0E6
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mm/mm/ºC x 1.0E6
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cm/cm/ºC x 1.0E6