When welded tubes are specified as suitable for galvanizing to EN 10240 quality A.1 (Option 7) or galvanized to EN 10240 quality A.1 (Option 9), the internal weld bead shall have no sharp edges or porosity. The height of the internal weld seam shall not exceed 0,3 mm + 0,05 T and the internal weld seam profile shall blend smoothly into the contour of the tube.