Cangzhou Bohai Pipe Fittings Co., Ltd. 20 # various flange ring groove flange and flange cover large-diameter flat flange large diameter high-neck flange blind character loose flange welded ring rotation anchor flange welding flange / cover welding flange welded steel flanges take marine Standard: Q / CSG 75-019-2008 This standard applies to ships products, marine engineering products. The main materials are: carbon steel, alloy steel, cold steel, stainless steel. Cangzhou Bohai Pipe Fittings Co., Ltd. 20 # 20 # 法兰法兰盖法兰盖法兰盖 large diameter carbon steel flanges plant, also known as large diameter blind flange 20 # carbon steel flanges price, is in the middle without holes flange, sealed pipe plug for use. Species form large sealing surface, with a flat, convex, concave and convex surfaces, tongue and groove, ring joint face. Sealing surface: flat (FF), raised face (RF), convex surface (MFM), tongue and groove (TG), ring joint face (RJ) 20 # carbon steel flange manufacturers _ National Low (certified) _20 # carbon steel flanges provided by Tube Co., Ltd. Cangzhou Bohai. Cangzhou Bohai Pipe Fittings Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is an industry leader in Cangzhou, Hebei, three, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.