1) The thermal expansion of pipe
The below table shows the thermal expansion of pipe per 1 M and pipe
material (Aluminum, copper, steel and iron ) and thermal expansion coefficient (¥â)
When estimating the thermal growth, the flowing procedure shall be applied.
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¡â L = ¥â(T - t ) L
¡â L = pipe expending amount
L = pipe length
¥â = thermal expansion coefficient
T = max, temperature
t = min, temperature
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¡á The example of calculation
nominal diameter : 250A
pipe material : SPP
fluid : steam
service temperature : Tmax = 160 ¡É, Tmin = -10¡É
installation temperature : Ts = 20¡É
the pipe length : L = 30m (the length between main fix points on straght line) pressure : 5§¸f /§²
the thermal coefficient of pipe : 12.0 X 10 mm/m/¡É
¡â L = (Tmax - Tmin) X ¥âX L = [160-(-10)] X 12.0 X 10 X 30 = 61.2mm
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