Hebei Chiho Pipe steel flange introduction; flange (Flange) also known as the flange or flanges. Tube and pipe flanges are so interconnected parts, connected to the pipe end. Flange connection or flange joint, is defined by flanges, gaskets and bolts of the three connected to each other as a group combined seal structure removable connection pipe flange means conduit means piping flanges, used in equipment means the outlet flange on the device. There are holes on the flange, so that the two flange bolts tightly connected. Between flange sealing gasket. Flange threaded connection points (wire tapping) flange and welding flange. Hebei Chiho Pipe flanges describes the technical requirements Chiho Pipe Co., Ltd. Hebei produced welded flange using certain technical parameters and requirements for production in the production and the production and use of carbon steel flanges, guaranteed to follow a certain way and the principle of the use and promotion of welded carbon steel flanges, the use of certain methods and principles of the process of production and welding, and strictly ensure the use of good quality. First, the level of technical requirements and welded flange shall comply with the requirements of JB4726-4728 of. 1, 0.25MP-1.0MPa, PN is carbon steel, austenitic stainless steel forgings allow the use of Ⅰ grade forgings. 2, except as follows, nominal pressure PN is 1.6MPa-6.3MPa forgings shall comply Ⅱ Ⅱ grade or above grade level requirements forgings. 3, in line with one of the following circumstances, should comply with Ⅲ and forgings requirements: (1) Nominal PN≥10.0MPa flange forgings; (2) Nominal pressure PN> 4.0MPa chromium molybdenum steel forgings; and (3) Nominal pressure PN> 1.6MPa and temperature ≤-20 degrees Celsius ferritic steel forgings. Second, the general use of forged or welded flange forging rolling process made. When using steel or steel manufacturing, must meet the following requirements: 1, welded flange should ultrasonic flaw detection, no delamination defects; 2, should be cut into strips carbon steel flanges along the rolling direction of the steel according to map processing, the bending welded into the ring, and to form a cylindrical surface of a steel ring. May not be directly machined into a steel plate with a neck flange; 3, the ring should butt weld with full penetration welds; 4, ring butt weld after weld heat treatment should be carried out, and for 100% ray or Ultrasonic testing flat carbon steel flanges, Class II and radiographic inspection in line with the requirements of JB4730, ultrasonic testing in line with the requirements of Class I JB4730's. Third, welded flange neck outer slope shall not exceed 7o. Butt welding flange in the production and strictly control the technical parameters, to ensure that production and use can fully play its role and value. Steel flange Sales | Hebei Chiho (certified) | carbon steel flanges provided by Chiho Pipe Co., Ltd. Hebei. 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.