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Advantages and Disadvantages of Forged Flanges and Cast Flanges

Mar. 10, 2020

Forged flanges and cast flanges are two common types of flanges on the market. The cost of cast flanges is low, the technical requirements are not high, the mass production cycle is fast, the price of forged flanges is slightly higher, the applicable pressure is high, and the quality it is good. The carbon steel forged flange supplier focuses on the analysis of the advantages and disadvantages of the two flanges, you can refer to the comparison, which product to choose according to actual needs.

First look at the cast flange: the cast flange, the blank shape is accurate, the processing volume is small, the cost is low, but there are casting defects (porosity, cracks, inclusions), the internal structure of the casting is poorly streamlined (if it is a cutting, streamline Worse), forged flanges generally have lower carbon content than cast flanges and are less prone to rust. The forgings are more streamlined, have a denser structure, and have better mechanical properties than cast flanges. Improper forging process will also cause large or uneven grains, hardening cracks, and the cost of forging is higher than that of cast flanges.

The advantage of casting is that it can get a more complicated shape and the cost is relatively low.  Carbon steel forged flange: The advantage of forged flange is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in the casting. The forging process generally consists of the following procedures, namely, selecting high-quality steel billets, heating, forming, and cooling after forging. The methods of forging include free forging, die forging and membrane forging. During production, different forging methods are selected according to the quality of the forgings and the number of production batches. Free forging has low productivity, large machining allowance, but simple tools and great versatility, so it is widely used to forge single-piece and small-batch forgings with simpler shapes. Free forging equipment includes air hammer, steam-air hammer and hydraulic press, which are suitable for the production of small, medium and large forgings. Die forging has high productivity, simple operation and easy mechanization and automation. Die forgings have high dimensional accuracy, small machining allowances, and more reasonable fiber organization for forgings, which can further increase the service life of parts.

Advantages and Disadvantages of Forged Flanges and Cast Flanges

Carbon Steel Forged Flange

After the flange is produced, the surface may appear uneven, burr, and not smooth enough. Therefore, after the flange is produced, we will artificially shape it to achieve the aesthetic appearance. Before the flanges are put into the warehouse, we need to grease the flanges to prevent corrosion. We also need to sand the surface with iron sand to remove the rust, so that the flanges can shine brightly.

The above is the comparison result of the two flanges. You can choose the appropriate flange pipe product according to the specific construction environment, applicable pressure and economic bearing capacity.