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ANSI B16.5 150LBS Weld Neck Carbon Steel Pipe Flanges Carbon Steel Flange WN Product Description: 1. Flange Material:ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH,P250GH, P280GHM 16MN...