... AND PROCESSING ALL SIZE Sainless Steel Perforated Tube The mostly used stainless steel perforated tube filter 304, 304L, 316, 316L. ... Open area: It will determine the strength of the support tube and the filter flow.Hole size and thickness: Various ... diameter: 0.2mm to 100mmProcesses involved in making of perforated tube filter perforating, flattening, rolling, cutting, bending, edging, welding and ...