1. flange production process flow:

According to the difference in processing technology, the key can be divided into four types of cast flanges: cast flanges, forged flanges, thick steel plate cut flanges, and rolled flanges

Casting flanges can produce complex appearance designs with very low cost; Generally, overall flanges, such as those used in gate valves or machinery, are made of cast iron, ductile iron castings, or steel castings. The flange produced by casting has a precise rough shape and small processing volume, but the internal structural structure of the cast flange has weak streamline and may have casting defects (such as cracks, sand holes, air vents, impurities, etc.).

2. Forged flange

Forged flanges have a higher compressive strength than cast steel flanges, and can withstand higher forward shear and tensile forces than cast parts. Forged flanges generally have lower carbon content than cast flanges, are less prone to rusting, and have better forged flow lines. The forging of flanges depends on the internal structure and structure being uniform, without any air holes in the castings. Its physical properties are better than those of cast flanges, and cast flanges are generally manufactured through free forging. The crystallization mechanism is delicate, the strength is high, the product cost is higher than cast flanges, and the price is also higher than cast flanges.

3. Cutting flanges

Before flanges became a commodity supply for social development, departments that used flanges for more than a decade chose to independently produce and manufacture steel flanges using cutting methods. The oxygen cutting method was used on thick steel plates to laser cut the nominal diameter, diameter, and thickness of the flange's remaining processing amount, and then mechanical processing and manufacturing of the flange surface, screw holes, and water lines were carried out.

4. Rolled flange

Roll up flanges are generally used in the production of some large-diameter flanges, and the process of using a medium plate cutting strip and rolling it into a circle is called roll up. After successful rolling, electric welding is carried out, followed by leveling, and then mechanical processing and manufacturing such as water lines and screw holes are carried out.