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), height of the lower neck, stiffness of the flange, the carrying capacity increased. Compared with welded flange, welding workload, electrode consumption is high 20 # flanges, can not withstand high temperature and pressure, and repeated bending and temperature fluctuations, but the on-site installation more convenient, you can omit the step of weld beat rub injury, more popular. Cangzhou Bohai Pipe Fittings Co., Ltd. Wholesale 20 # flange diameter flange is a flange 20 # forged flanges, widespread use and promotion in the machinery industry, users get the praise and favor. Extensive use of large-diameter flange, range determined in accordance with different characteristics, and more for 20 # flange welded under conditions of relatively mild case of media, such as the low-pressure non-compressed air purification, low circulating water with neck flat welding method 20 # Portland, which has the advantage of cheaper prices. Large-diameter flange for nominal pressure of not more than 2.5MPa of pipe connections, large-diameter flange sealing surface can be made smooth style, bump-type three-song set and tenon slot 20 # flanges, Cangzhou Bohai (Certified ), 20 # flanges provided by Pipe Co., Ltd. Cangzhou Bohai. Cangzhou Bohai Pipe Fittings Co., Ltd. (www.czbh628.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 customer needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.