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ANSI B16.9 ASTM A234wpb Butt Welding Smls Pipe Fitting Tee Product Description Size 1/2"-72" Wall Thickness SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH140, SCH160,XXS, DIN, JIS ...