Calculation method for surface area of 90 ° stamped elbow

The calculation method for the surface area of a 90 ° stamped elbow is as follows:

90 ° stamping elbow surface area=bending radius x2/4x3.14 x outer diameter x3.14;

Simplification shows that the surface area of a 90 ° stamped elbow is 4.9298x bending radius x outer diameter;

Attention: The bending radius is the centerline of the elbow (not visible).