A measure of the length will be in linear units. So make sure that the measurement is made or expressed in metres.
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It is the length, so 4 metres.
The answer depends on the cross section of the pipe and its length.
please tell me i have installed 500 square meter pipe that means how much length of pipe has been install To calculate square meters, multiply the length of the area in meters by the width in meters.
D=Diameter L=Length ={(D^2)/(162)*L}
Friction Loss in PVC fittings in Equivalent Feet of Straight PipeStraight Pipe Size (IN.)1/2"3/4"1"1 1/2"2"3"4"90 Elbow, Standard1.52.02.254.06.08.012.045 Elbow, Standard0.751.01.42.02.54.05.0Insert Coupling0.50.751.01.52.03.04.0Gate Valve.3.4.61.01.52.03.0Male/Female Adapters1.01.52.03.54.56.59.0Tee, Flow Thru Run1.01.41.72.74.36.38.3Tee, Flow Thru Branch4.05.06.08.012.016.022.0