Butt welding flanges are commonly used for butt welding of flanges and pipes. They have a reasonable structure, high strength and stiffness, can withstand high temperature, high pressure, repeated bending, and temperature fluctuations, and have reliable sealing performance The welding flange with a nominal pressure of 0.25-2.5MPa adopts a concave convex sealing surface.
The welding method used for connecting flanges and pipelines by butt welding is butt welding, and the weld seam is similar to the welding between pipelines. Generally, for small pipe diameters, argon arc welding is used as the base and manual welding is used for the cover, while for large pipe diameters, double-sided welding is used. Require the weld strength to reach at least the strength of the base metal. The surface of the weld seam is flat and smooth, without defects such as burn through, porosity, welding leakage, slag inclusion, undercutting, incomplete welding, etc. The remaining height is less than 2mm. When welding the flange base, J506 welding rod must be used for manual welding and low current welding should be used. Strictly follow the welding process for welding. After welding each position, use a level to gauge the deformation of the flange plane. When welding flanges, use an air hammer to strike the weld seam while welding to eliminate stress.
1. Connect the pipeline and maintain its sealing function; In industrial pipelines, butt welded flange connections are widely used. The flange connection is easy to use and can withstand high pressure.
2. Facilitating the replacement of a certain section of pipeline; Carbon steel, also known as carbon steel, refers to iron carbon alloys with a carbon content of WC less than 2%. Welding flanges are produced and manufactured using different methods and processes in actual production and development. According to the process methods and principles, they have important value and effects on different aspects. Adding certain elements in actual production increases the characteristics and value of carbon steel flanges, demonstrating good usage characteristics and value.
