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Product Description Anti-rust Oil DN10-DN2000 ASTM A182 F22 Steel BL Flange 1. Grade: ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH, P250GH, P280GHM 16MN, 20MN ,20# ASTM A182, F304...