8 Years
300LB/300#/CLASS 300 weld neck flanges product specifications 1.Material:ASTM A105,Q235,20#,Q345,ST37.0,ST35.8,St37.2,St35.4/8,St42,St45,St52,St52.4,STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49 etc ...
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