Relevant and relevant technical requirements for carbon steel flange
Flange is mainly flange material made of carbon steel metal end flange connector or flange plate, the main production process is casting, medium plate roll, forging, medium plate cutting and other different processes made of carbon steel flange process flange is not the same. Carbon steel flange in the domestic most according to the requirements of the size, tolerance range production of the flange, usually if it is inferior carbon steel flange mostly old technology or steel itself cracks appear air holes after welding will also leak, in the industry for carbon steel flange production according to the size of the flange is also known as two standard flange, carbon steel flange regulation pressure mark is divided into PN mark and Class mark. The specification of the large diameter welding flange is not fixed, according to the specific field requirements, usually the middle plate is cut first, the length of the sub according to the specification of the large flange. Then use the ring coil machine to make a circle, with welding rod to weld the interface firmly, welding joint X spectrum should be conducted test. Then press the press, and then use the lathe for processing water line, chamfer and other processes, after it is divided with the drilling machine for bolt hole drilling processing. The bolt holes should not be punched in places with large flange welding joints. Carbon steel forging high pressure mainly refers to the flange made of carbon steel, low carbon, generally not rust than casting flange, and the forging streamline is better, the organization is relatively dense, mechanical energy is better than casting flange, this is some of its advantages, but its specifications are diverse, but also hope you know more. The A350LF2 is a low-temperature steel forging of the American standard. It belongs to one of the carbon steel flanges, the chemical composition is about equivalent to 20Mn or 16Mn in China, but the upper limit of Mn content of 16Mn beyond the range needs to re-check screening raw materials, and the scope of application is low temperature environment in-29℃, and A350LF2 can be applicable to low temperature environment in-46℃, so the domestic general quality control treatment to meet the requirements.
