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The formula for calculating the 90 degree elbow is W+R*2*3.14/4*P=Meter Square . The area is computed by using the formula (W+R)_π/4_P.
(90/2tan*Dia*1.5*25.4) (45/2tan*Dia*1.5*25.4) u will obtain Ur answer in (mm)
39in.
Measure 45o
If your elbow is a short radius it is 1 times your nominal pipe diameter. If it is a long radius it is 1 1/2 times your nominal pipe diameter.show me the exact pattern of long radius