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B16.9 Carbon Steel Butt Welded 90 Degree Elbow Seamless Pipe Fittings Size 1/2"---24" Wall Thickness SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120, SCH140,SCH160,XXS, DIN, JIS standard ...