1) Flanges Material: ASTM A105 ASTM A350 LF2 ASTM A694 F52 F60 F65 F70 Forged Steel Flanges,forged fitting,forged flangeFeatures:1) Material: ASTM A105 ASTM A350 LF2ASTM A694 F52, F60, F65, F70, ASTM A182 F304, F304L, F316, F316LASTM A182 F51, F53ASTM A182 F11, F22AISI 4130, AISI 8630, AISI 4140, AISI 8630Mod,API 6A, API 6B, API 17DNACE MR 0175 HIC TM0284, SSC TM0177 API 17D Flange