What are the manufacturing processes for BS4504 flanges?
he manufacturing process of BS4504 flange mainly includes forging, casting, cutting and rolling, among which forging and casting are the two most mainstream methods. Different processes directly affect the mechanical properties, applicable scenarios and cost control of the flange.
1, Forged Flange
Forging is the process of heating a metal billet to a plastic state and applying pressure through forging equipment to shape it, resulting in a denser structure and better performance.
Low carbon content, not easy to rust, especially suitable for high-pressure, high-temperature or corrosive environments
2, Casting process (Cast Flange)
Casting is the process of pouring molten metal into a mold and cooling it to form, which is suitable for complex structures and has a lower cost.
Low cost, suitable for large-scale, low-intensity demand scenarios
Centrifugal casting: Steel is formed in a high-speed rotating mold, with a denser structure and better quality than ordinary sand casting. It is commonly used in the production of flat welding flanges
3, Cutting Plate Flange
Cut the flange blank directly from the steel plate and then machine it.
Low material utilization rate, but no need for molds, suitable for temporary needs of medium and low pressure, non-standard sizes
4, Rolled Flange
Roll the steel plate into a circular shape using a plate rolling machine, weld the joints, and then process it into shape.
Suitable for large diameter flanges (such as DN1000 and above), solving the size limitations of forging or casting
The quality of the weld seam directly affects the overall strength and requires strict non-destructive testing
