Butt welding flange is not easy to be deformed, sealed, widely used, has corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition, the welding joint is away from the joint surface, the joint surface is protected from welding temperature deformation, it takes more complicated cough pair of compact structure, suitable for pressure or temperature fluctuations in the pipeline or high temperature, high pressure and low temperature piping, generally used for PN greater than 2.5MPa connection of pipes and valves ; also used to transport is expensive, flammable, explosive On the tubing of the media.
Production process :
Connection form : single-sided welding, double-sided nut connection.
Product features : beautiful appearance, smooth surface, acid and alkali resistance, anti-corrosion, strong texture performance.
Production process : sub-oxygen furnace cutting, integral forging or finished forging cutting.
Processing methods : high-precision CNC lathe turning, CNC rocker drilling.
Technical requirements :
Butt welding flanges are typically made using forging or forging processes. When made of steel plate or section steel, the following requirements must be met :
1. The welding flange should be ultrasonically flawed without delamination defects ;
2. It should be cut into strips along the rolling direction of the steel, and welded into a ring by bending. And the surface of the steel is formed into a cylindrical cylinder. The steel plate shall not be directly machined into a neck butt weld flange ;
3 , the butt weld of the ring shall be full penetration weld.
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