reducing tee butt weld ONE SIDE WELD Specifications 1.MATERIAL:ASTM A234-WPB.A420-WPL6.A234-WP12.A234-WP11.A234-WP5, API series, A234 P5 11 22 91 2...

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butt welded reducing coupling butt weld return bend weld lap joint stub ends

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