Unfolded length of storage tank wall panels
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How is the unrolled length of the tank wall panels for large storage tanks calculated? I’ve seen the drawings from the design institute, which state that \"the unfolded length of the tank wall panels is calculated using the centroid line of the cross-section as the diameter.\" How is this centroid line of the cross-section determined?
The average of the inner diameter and outer diameter.
The unrolled length of the tank wall panels for large storage tanks is calculated based on the central diameter of each ring of wall panels, which is equal to the inner diameter of the tank plus the wall thickness; the calculation diameter varies for wall panels with different thicknesses.
Since large storage tanks usually have their inner walls aligned with one another, and the thickness of each wall panel decreases as one moves around the tank, the mean diameter of each wall panel also varies.