Question about the expansion coefficient of 20# carbon steel?
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Currently, we have added a section of 20# carbon steel pipe with a length of 1000m, DN40, and dimensions of φ98*3. The lowest temperature in winter is -20 degrees, while the highest temperature of the fluid flowing through the pipe is 100 degrees. Now we need to install an expansion joint, and it is necessary to know the amount of expansion/contraction of the pipe. How should this be calculated?
The linear expansion coefficient of steel seems to be 12.1~13.5×10^-8; it is recommended to use specialized software for calculations. Because it is related to many factors.
I checked in the metal materials handbook, and the linear expansion coefficient of metals is between 10-20*10^6. The formula I found online is: length change = (t1-t2) * L * expansion coefficient. I’m not sure if this is correct
Such a long pipeline should have several U-shaped connectors installed to address the expansion issue. It’s not possible to have one expansion joint, and it’s not good either.
The initial estimate is that the expansion amount is over 1,000 millimeters; several expansion bends will be needed to address this issue
I’m sorry; I entered the wrong length. It’s a 34m pipe. The expansion amount has now been calculated, but I don’t know how to determine the appropriate length for the expansion joint. Thank you
Based on 60% of the effective working length of the expansion joint, an adjustment range of 1800 mm for the expansion joint is required.