Welded Miter elbows are not standard fittings because are fabricated from pipes. High skill pipe fitter is required to manufacture this type of Miter Type Elbow. Long Radius Miter Elbow preferred size is min 10” & above as large size elbow price is very high compare to other steel buttweld elbows. All types of ASME B31.3 Miter Elbow such as Round Duct Miter Elbow, Rectangular Miter Elbow, Miter Round Elbow, Miter Reducing Elbow & Miter Joint Elbow can be fabricated in 2, 3, & 5 pieces.
A Miter Bend or Elbow is a joint made by beveling each of two pieces to be joined, usually at a 45° angle, to form a corner, usually a 90° angle. There are two types of mitre joint, one Non-perpendicular joints & another is Three-dimensional joints. AWWA C208-96 Miter Elbow are produced from miter cut pieces of pipe. The Miter pieces also called gores which used to make Mitered Elbow. You will found two end gores and three middle gores in a 5-piece Miter Pipe Elbow. As per the AWWA specification the radius of a 60" elbow is 90". The “center-to-face” is 92.065".