Cangzhou Bohai Tube Co. specializing in the production of 20 with a neck flange welded flange with neck flat welding flange with neck flat welding flange (HG20592-2009 (PN series) \ HG20615-2009 (calss series), GB / T9116) factory 20 # flanges, neck, lower height, stiffness of the flange, the carrying capacity increased. Compared with the butt welded flange 20 # flanges, welded heavy workload, electrode consumption is high, can not withstand high temperature and pressure, and repeated bending and temperature fluctuations, but the on-site installation more convenient, you can omit the weld beat rub injury 20 # flange forging process, the more popular. Cangzhou Bohai Tube Co. specializing in the production of 20 # flange welded flange sliding flange: sliding flange has a low hub because the pipe before entering the single flange welding. This is welded inside and outside provide sufficient strength to prevent leakage. Sliding flange 20 # flanges, all matching bored slightly larger than the outside diameter of the pipe they are welded neck flange, due to lower initial cost, a lot of users, but probably will not last more than the cost of installation, The increased because fewer weld neck flanges. Wholesale # 20 # flange _20 _ Cangzhou Bohai Flange Co. provided by Cangzhou Bohai fittings. Cangzhou Bohai Pipe Fittings Co., Ltd. (www.czbh628.com) strong, credible, and other industries in Hebei Cangzhou tee accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Cangzhou Bohai and you hand into the brilliant, for a better future!