The blind flange is a solid plate used to block the pipeline equipment at the connection of the two flanges, or a commonly used steel plate. The purpose is to pressure test, leak test and block the pipeline of pipeline equipment.
Forged flanges generally have lower carbon content than cast flanges and are not easy to rust. The forged parts are streamlined and have a denser structure. The mechanical properties are better than cast flanges. Improper forging process can also cause large or uneven grains, hardening cracks, and the cost of forging Higher than cast flange.
Forgings can withstand higher shear and tensile forces than castings.
The advantage of forgings is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in the castings;
Let's understand the production process of forged flanges:
The forging process is generally composed of the following procedures, that is, selecting high-quality steel blanks, heating, forming, and cooling after forging. The forging process methods include free forging, die forging and tire forging. During production, different forging methods are selected according to the quality of forgings and the number of production batches.
Free forging has low productivity and large machining allowance, but the tool is simple and versatile, so it is widely used for forging single-piece and small-batch forgings with relatively simple shapes. Free forging equipment includes air hammer, steam-air hammer and hydraulic press, etc., which are suitable for the production of small, medium and large forgings respectively. The productivity of die forging is high, the operation is simple, and it is easy to realize mechanization and automation. The die forgings have high dimensional accuracy, small machining allowance, and the fiber structure distribution of the forgings is more reasonable, which can further improve the service life of the parts.
