Cangzhou Bohai Pipe Fittings Co., Ltd. specialized manufacturer 20 # flange nominal sch5s, sch10s 20 # flanges, sch20s, sch30s, sch40s other manufacturing standards: GB offer 20 # flanges, American Standard, the Russian standard, Japanese standard and other material: 201 , 304.316.316L.0Cr18Ni9.321.202 etc. Uses: Widely used in water conservancy, electricity, power plants, pipe fittings, industrial, pressure vessels and other connection: flange nut, bolt connection. Cangzhou Bohai Pipe Fittings Co., Ltd. 20 # flange welded flange lap Flanges: in fact, is exactly the same lap sliding flange flange manufacturers 20 # flange, unless it is in the hole and flange races A radius. This is necessary to accommodate the radius of the overlapping flange stub end. Typically American Standard 20 # flange, lap and lap at the end of the stub mating flanges together to assemble the system. The socket welding flange is a similar sliding flange, unless it has a hole and anti-hole size. Counter bore little beer than match OD pipe flange so that the pipe is inserted into a similar sliding flange. In the smaller hole diameter is the same as the ID of the same matching pipe. Limitation is built into the hole, as a shoulder sleeve designed for pipe stays at the bottom. This eliminates any traffic restrictions in the use of socket welding flanges. Flange Standard: HG20592-2009 (PN series) \ HG20615-2009 (Calss series) 20 # flange | 20 # flat welding flange | Cangzhou Bohai (Certified Merchant) Ltd provided by Cangzhou Bohai fittings. Cangzhou Bohai Pipe Fittings Co., Ltd. (www.czbh628.com) is specialized in the "elbow, flanges, reducers, hangers, flanging, intubation, welded flanges, pipe wear" business, Companies adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Zhangsong Wei.