Neutral axis is a measurement of distance along the midpoint in the tube wall thickness. It is different from the circumference because it is not the outside of the tube but a point in the very middle of the tube wall thickness.
The Fabricator Blog
Still Building America—The proof is in the weld - by Josh Welton The measure of your success as a welder lies in the quality of your weld. For female welder Sam Riggin, the quality of her welds also has earned her respect in a male-dominated profession.
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