How to calculate the thermal compensation (Π-shaped) elongation of pipes
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How is the thermal compensation (Π-shaped) elongation of pipes calculated? ?
If a few sentences aren’t clear, it’s better to read books – the Chemical Process Design Manual, Pipe Thermal Stress Analysis, calculations of thermal expansion, calculations of compensation values, and thermal stress calculations – all of these need to be studied.
It’s not easy to find information; the red book provides very general details
The amount of expansion of a steel pipe when heated is calculated using the following formula: ΔL = aL(t2 – t1), where ΔL represents the amount of expansion of the pipe, in mm； a —— Linear expansion coefficient of the pipe material ； t2 —— the thermal calculation temperature used in pipeline design calculations, usually taken as the highest temperature of the fluid inside the pipe℃ ； t1 —— Design and installation temperature of the pipeline, °C. L — Length of the straight pipe section (m)