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By certification 
The company pursues the accuracy and refinement of manufacturing, and constantly improves its own lean manufacturing equipment, including every component.
The company strictly implements ISO, GB, NB, JB, HG, AISI, ASTM, JIS, BS and other production standards to ensure the high quality of the products.According to the type of flange connection, it can be divided into: plate flat welding flange, neck flat welding flange, neck butt welding flange, socket welding flange, threaded flange, flange cover, neck butt welding ring loose flange, flat welding ring loose flange, ring groove face flange and flange cover, large diameter flat flange, large diameter high neck flange, spectacle blind plate, butt welding ring loose flange, etc.
http://www.cxflange.com/
