Elbow flanges are commonly used for flange connections or flange joints, referring to a detachable joint consisting of a flange, gasket, and bolt interconnected as a combined sealing assembly. Pipe flanges are those used for piping in pipeline installations, while flanges on equipment refer to the inlets and outlets of the equipment.

The production process is mainly divided into four types: forging, casting, cutting, and rolling.

Cast Flanges and Forged Flanges

Forged flanges have accurate rough shape and size, minimal machining required, and low cost; however, they may have casting defects (pores, cracks, inclusions). The internal structure of the castings has poor streamline (especially for machined parts, the streamline is even worse).

Forged flanges typically contain lower carbon than cast flanges, making them less prone to rust. The forging has better streamlining and a denser structure, resulting in superior mechanical properties compared to cast flanges.

Improper forging techniques can result in large or uneven grain structure, hardening cracks, and higher forging costs compared to casting flanges.

Forgings can withstand higher shear and tensile forces than castings.

The advantages of castings lie in their ability to produce more complex shapes at a lower cost.

Forgings offer the advantage of uniform internal structure, free from harmful defects such as voids and inclusions commonly found in castings.

Differentiating cast flanges from forged flanges in terms of the production process, for instance, centrifugal flanges fall under the category of cast flanges.

Centrifugal flanges are produced through precision casting methods, which have a finer grain structure compared to common sand mold casting, resulting in improved quality and reduced likelihood of issues such as疏松, air holes, and sand holes.

Firstly, we need to understand how centrifugal flanges are produced and manufactured, as well as the process and products of centrifugal casting for making socket weld flanges. The characteristic of this product is that it is processed through the following steps:

The selected raw material steel is melted in a medium-frequency induction furnace, raising the molten steel temperature to 1600-1700°C.

② Preheat the metal mold to a constant temperature of 800-900°C.

③ Start the centrifugal machine and pour the molten steel from Step 1 into the preheated metal mold from Step 2.

④ Allow the casting to naturally cool to 800-900°C and maintain for 1-10 minutes.

⑤ Cool with water to near room temperature, then remove and demold the casting.