... stainless steel perforated tube filter 304, 304L, 316, 316L. Carbon steel can also be used.Hole pattern: Micron round, diamond and ... others.Open area: It will determine the strength of the support tube and the filter flow ... 0.2mm to 100mmProcesses involved in making of perforated tube filter perforating, flattening, rolling, cutting, bending, edging, welding and ...