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1.Standard ASME B16.5,ASME B 16.47,DIN EN 1092-1,DIN 1759-1,MSS SP-44,API605,GB/T9112 GB/T13402 HG/T20592 HG/T20615 ,GB/T 10746,GB/T10747 2.Material :A105,Q235B,10#,20#,16Mn,45#,Q345B,304,304L316,316L ...