The forged flange is a process for producing a production flange which is developed on the basis of the cast flange. The forged flange has a higher strength than the cast flange. The quality is relatively good, the price will not increase a lot.

Generally, the low-quality pipes will be connected by casting flanges. The high-quality pipes will be purchased with forged flanges. The quality of the forged flanges is better. In the quality pipeline, it is not useful for the low-quality pipeline to be able to exert sufficient performance.

Casting flanges can only be used up to 16Kg, and are normally used in 10Kg or 6Kg pipes. Except for pressure requirements, the temperature should not be too high or too low. Generally, there is no specification, but it is recommended to use forged flanges for important pipes. For example, some places with the high-temperature difference or vibration of the pipe may cause breakage, cracking, water leakage, etc. due to poor quality of the cast flange.

The flange is cast, the shape of the blank is accurate, the processing volume is small, and the cost is low, but there are casting defects (pores, cracks, inclusions); the internal flow of the casting is poor (if it is a cutting part, the streamlined type is worse);

Forged flanges generally have lower carbon content than cast flanges and are less prone to rust. Forgings have better-streamlined shape, denser structure, and better mechanical properties than cast flanges.

If the forging process is improper, the grain will be large or uneven, and the hardening crack will occur. The forging is higher than the casting flange;

Forged flanges can withstand higher shear and tensile forces than cast flanges;

The advantage of the cast flange is that it can produce a more complicated shape and the cost is relatively low;

The advantage of the forged flange is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in the casting;

Different from the production process, the difference between the cast flange and the forged flange, such as the centrifugal flange, is one of the cast flanges.

The centrifugal flange belongs to the production flange of the precision casting method. This kind of casting is much thinner than an ordinary sand casting structure, and the quality is improved a lot. It is not easy to have problems such as loose structure, pores, and trachoma.

First of all, we need to understand how the centrifugal flange is produced and processed by centrifugal casting to make a flat welding flange. The product is characterized by the following process steps:

#1 The selected raw material steel is smelted in an intermediate frequency electric furnace to make the molten steel temperature reach 1600-1700 °C;

#2 Preheat the metal mold to 800-900 °C to maintain a constant temperature;

#3 Start the centrifuge, and inject the molten steel in step 1 into the metal mold after preheating in step 2;

#4 The casting is naturally cooled to 800-900 °C for 1-10 minutes;

#5 Cool down to near normal temperature with water and demould remove the casting.