Calculation problem of thermal expansion in pipelines
Thread Content
I would like to ask: for high-temperature flues, in the case of circular pipes (for example, with a diameter of 3000 mm), and rectangular pipes (such as 2000*6000 or 6000*7000), how is the length increase due to thermal expansion calculated when the temperature reaches 300 degrees? Are the parameters they selected consistent (same material)? Are there any specific criteria for calculation that can be followed?
The amount of expansion for any size = linear expansion coefficient * temperature change * original size. For example, the linear expansion coefficient of carbon steel is 0.000012; for any size – whether it’s the diameter or the length or width of a rectangular tube – 3000 mm * 0.000012 * (temperature after change of 300°C – temperature before change of 25°C) = 9.9 mm. The expansion amount is calculated in this way for any size, regardless of its shape
On the second floor, everything is correct except for using the diameter for calculations; the length should be calculated as the distance between two fixed points~
The diameter calculation is also correct; sigh, I just can’t understand it
Objects of any shape expand in the same way as scaling in CAD drawing, with all dimensions being enlarged.
Is there any software for calculating hot air flues? Is the calculated stress similar to that of soda pipes?
Thermal deformation is always calculated with a fixed point as a reference. The calculation formula is: deformation amount = temperature difference × linear expansion coefficient × distance to the fixed point