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ANSI B16.9, B16.28 DIN 2605-1, 2605-2 EN 10253-1 Up to 10” N.B. all schedules Carbon steel: ASTM/ASME SA234 WPB, WPC, WPL6 Alloy steel: ASTM/ASME SA234 WP5, WP9, WP11, WP12, WP22,WP91