Concentric Reducer Application Industrial Processes Product Waste Lines Vacuum Fitting Side A Connection Type Butt Weld Fitting Side B Connection Type Butt Weld Exterior Finish Unpolished Material Grade 316L Fitting Material Stainless Steel Fitting Side A Tube Outer Diameter 4 in Fitting Side B Tube Outer Diameter 3 in Fitting Wall Thickness 0.083 in Overall Length 4 in Specific Fitting Shape Concentric Reducer Standards 3A ASME FISA FPSA ISPE WCMA