![]() This type of bending is usually performed on a rotary draw bender for speed and precision, which requires specific tooling built for each bend. 2D = 4 inches, 3D = 6 inches, and 5D = 10 inches for a 2 inch diameter pipe. In these cases, the 2D would reference a centerline bend radius of two times the diameter. For example, on a 2 inch pipe elbow, common bend measurements may be referred to as 2D, 3D, or 5D. In some instances, a rough guide for minimum radius bending would be to use a multiple of the piece diameter. A 2” carbon steel pipe will have a different minimum radius from a thin wall 2” aluminum tube. There are many factors to take into account when determining the minimum radius such as the material composition, shape, and size. ![]() In some instances, an estimator can quickly say yes or no based on prior knowledge and bending experience. ![]() Often, in the rolling and bending industry, we field requests asking about the minimum radius to which we can roll or bend a piece.
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