... RJF)long welding neck flange ANSIANSI B16.5class150,300,400,600,900,1500,25001/2"-24" MSSASME B16.47SER ... ,Aclass150,300,400,600,900 12"-60" APIASME B16.47SER,B class75 ... that we have the privilege of serving you soon.MaterialForged Carbon Steel, Stainless Steel , Duplex Stainless Steel , Low Alloy ... require.Welcome to your enquiry! non-standard carbon steel pipe flange