... Hole:round,cross,oval Open:10%--80% DESIGN AND PROCESSING ALL SIZE Sainless Steel Perforated ... Tube The mostly used stainless steel perforated tube filter 304, 304L, 316, 316L. Carbon steel ... strength of the support tube and the filter flow.Hole size and thickness: Various to ... to 100mmProcesses involved in making of perforated tube filter perforating, flattening, rolling, cutting, bending, edging, ...