4.  Typical Size

Size	Outside Diameter mm	Permissible Variations in Outside Diameter mm	Wall Thickness mm	Average Wall Permissible Variations in Wall Thickness
89×6	89	±0.75	6	±7.5%S

Note:Standard requirements control range:OD：±0.75mm，WT：±7.5%S

5. Typical Application Environment

     The duplex stainless steel seamless tube is mainly used in pressure vessel, pressure tanks, high pressure pipe, heat exchanger (chemical processing industry), oil and gas pipelines, heat exchanger pipes, sewage treatment system, pulp and paper industry classifier, bleaching equipment, storage processing system, high strength and corrosion resistance of rotating shaft, squeezing roller, blades, impeller, ship or cargo tank trucks, food processing equipment, the water environmental equipment, etc.