flat face threaded flange

Cut flange

Directly cut out the inner and outer diameter and thickness disks of the flange on the middle plate, and then process the bolt holes and water lines. The flange produced in this way is called a cut flange. The maximum diameter of this type of flange is limited to the width of the middle plate.

rolled flange

The process of cutting strips from a medium plate and then rolling them into circles is called rolling, and is mostly used in the production of some large flanges. After successful rolling, it is welded, then flattened, and then the waterline and bolt holes are processed.


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The main production processes are mainly divided into four types: forging, casting, cutting and rolling.

The cast flange has accurate rough shape and size, small processing volume, and low cost, but it has casting defects (pores, cracks, inclusions); the internal structure of the casting has poor streamlined structure (if it is a cutting part, the streamlined shape is even worse);

Forged flanges have low carbon content and are generally less likely to rust than cast flanges. The forgings have better streamlines, denser structures, and better mechanical properties than cast flanges;flat face threaded flange flat face threaded flange

Improper forging process will also cause large or uneven grains, hardening cracks, and the forging cost is higher than that of cast flanges.

Forgings can withstand higher shear and tensile forces than castings.

The advantage of castings is that they can produce more complex shapes and the cost is relatively low;

The advantage of forgings is that the internal structure is uniform and there are no harmful defects such as pores and inclusions in castings;

The difference between cast flanges and forged flanges is distinguished from the production process. For example, centrifugal flanges are a type of cast flanges.

Centrifugal flanges are produced by precision casting. This type of casting has a much finer structure than ordinary sand casting, and its quality is much improved. It is less prone to problems such as loose tissue, pores, and trachoma.


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