carbon Steel elbow .Definition of long radius and short radius. Long radius elbow means the bending radius is 1.5d, there also have 3D elbows. The elbow bending radius that equal or above 3D is called bends. The short radius elbow means the bending radius is 1D.
Definition of miter elbow. Miter elbow is welded by many straight pipes that cut by a certain degrees on both end ( The end pipe only one side cut). The quantity of the pipes is depend on the customers request. The bending radius is not like the induction elbows. The bending radius of the Miter elbow is different.