Hebei Chiho Pipe flange screw connection points (wire tapping) flange and welding flange. Low pressure small diameter wire connection flange steel flange manufacturers, high-voltage and low-voltage large diameter are using welding flange thickness and bolt diameter and the number of different connection flange pressures are different. By making material can be divided: WCB (Carbon), LCB (low carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% Cr 0.5% Mo steel), Hebei Chiho tube in the pipe flange industry standard inside There should be no convex welded flange (M) steel flanges, flat welding flange only raised face (RF). Are two different names. Influenza in the pressure vessel welded flange, welded flange B in the form of convex and concave face seal. The pressure in the pipe flange is generally concave face seal ≥4.0Mpa form will be used, and in the Ministry of Chemical Industry welding flange standards (HG) and the Department of Mechanical welding flange standard (JB / T81-94) in The maximum pressure is 2.5MPA. Although there 4.0MPA flat welding flange in GB9119-2000, but its dimensions are with all the specifications of the Ministry of Chemical 2.5MPA welded flange of the same size. Hebei Steel Flanges price _ Chiho (certified) _ steel flange provided by Pipe Co., Ltd. Hebei Chiho. Hebei Chiho Pipe Co., Ltd. (www.hbqh628.com) (www.hbqh628.com) Hebei Cangzhou, forging leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Hebei Chiho leadership with the staff warmly welcome all inquiries negotiations to create the Hebei Chiho better future.