Steel pipe corner weld grinding, weld scar is relatively not thick, you can use angle grinder with nylon angle grinding wheel, one-time completion of the process of de-welding and polishing.
Applicable angle grinder disc size of 4~5 inches, nylon sheet in the fine grinding and polishing have a certain effect, especially such as corners, the use of soft material nylon sheet, because the cutting force is not strong, so the nylon sheet.
Because the cutting force is not strong, it will not break the mother material at the tip of the corner. In cases where a mirror effect is not required, a single pass is sufficient.