... in manufacturing. We own many advanced production line, equipment and introduce the latest technique to manufacture pipe fitting. Our ... A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91, and WP92 A420WPL6Stainless steel: A403/WP304/WP304L/WP304H/WP316/WP316L/WP317L ... /WP321TypeBW, SW, Seamless and weldedWall thicknessSch5 to Sch160 and STD,XS,XXSStandardANSI/ASME, DIN, ISO, JIS ...