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butt welded pipe tee(BW) from CANGZHOU Specifications 1.MATERIAL:ASTM A234-WPB.A420-WPL6.A234-WP12.A234-WP11.A234-WP5,304 304L 316 316L 321, API series, A234 P5 11 22 91 2.SIZE:1/2"-72" 3.WALL ...