item name:cast steel flanges(pipe flange,fitting) Material: Carbon Steel:ASTM A105,20#Q23516Mn ASTM A350 LF1, ... CL1/CL2, LF3 item name: cast steel flanges(pipe flange,fitting)Seal Cover:FFRFMFMTGRJMaterial: Carbon Steel:ASTM A105,20#Q23516Mn ASTM ... CL1/CL2, LF3 CL1/CL2ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70Stainess Steel: ASTM A182 F304304L F316316L1Cr18Ni9Ti0Cr18Ni9Ti32118-8Alloy ...