Sweeps are gradual bends and usually described as anything less than 45deg of bend. And returns are just that, 180deg of bend; making a return to the direction from which it came. These pipe/tube fittings are generally described in one of two different ways; short radius or long radius bends.
A sweep elbow is simply an elbow made out of a bent piece of pipe. … To put this into context versus weld elbows, a short radius sweep elbow has a centerline of 3D (3 x the diameter of the elbow) whereas that is considered a long radius on a weld elbow. Sweep elbows usually have tangents on each end as well.
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