Wedge wire filter tube, also known as slot mesh tube, Johnson screen tube, T-shaped /V Shaped wire filter tube, fully wound welding wire tube or Johnson Screen tube, is spirally wound on the axial support rib by high-precision surface wire, and the support rib and surface wire are firmly welded with each other by resistance welding. These filter elements have the characteristics of high precision, small gap opening and excellent roundness. The gap pipe can be equipped with necessary end cover, flange, screw thread and other connectors and stiffeners.