Load on Buried Pipe per Unit Length includes the weight of the pipe, fittings, insulation, fluid in pipe, piping components such as valves, valve operators, flanges, and so on. And is denoted by w'. Load on Buried Pipe per Unit Length is usually measured using the Kilonewton per Meter for Surface Tension. Note that the value of Load on Buried Pipe per Unit Length is always negative. Typically, the value of Load on Buried Pipe per Unit Length lies in the range from -200 to 200.