What Does Cross Sectional Area Mean?
A cross sectional area is the area of the sliced portion of a 3D object, such as a pipe. When a pipe is sliced perpendicular to its longest axis, the cross sectional area will be calculated for the top part of the sliced portion, which is a circle. Calculating a cross-sectional area is an integral part of trenchless rehabilitation methods because based on this area, the size of the lining or replacement pipe is determined.
Cured-in-place pipe lining may require lesser change in cross sectional area of the host pipe than that would be required for the purpose of pipe bursting or sliplining. It's also used for calculating the flow rate of a pipe or pressure drop.