Thu Apr 30, 2020 8:45 am by WEW51L110
CB, please note that the bending method you described using sand is an effective way to make the radiused bends. However, please be aware that all bending of straight tubing requires some degree of stretching and compression of the metal to take place. The outside (longer) radius requires stretching while the inside radius (shorter) requires some degree of compression. The tubing metal will stretch more readily than compress. Therefore, the tighter the radius, the more stretch is required of the metal on the outside radius. Most commercial benders are designed to accommodate that stretching and maintain it to within acceptable, allowable limits. Bending to a tighter radius is possible, however, the risk is then such that the tubing metal may now be compromised and potentially weaker enough to rupture if higher pressures are applied. While the tubing may have a specific pressure rating, stretching the metal thins the wall thickness and reduces the acceptable working pressures.
L110 owner since 1974, finally rebuilt 2014.