ASTM standard flange 1.Material:carbon steel, 2.size:1/2"-24" 3.Standard:ANSI,DIN,EN1092-1 ASTM standard flange NameASTM standard flange Range½” (15 NB) to 64” (1200NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. Available with NACE MR 01-75 material stainless steel , carbon steel , nickel alloy ,cast iron ,brass , aluminum ...