Low price BL Flange products are also called blind plates, and the correct name is flange covers. It is a flange without a hole in the middle, which is used to seal the pipe plug. There are many types of sealing surfaces, including flat surfaces, convex surfaces, concave-convex surfaces, tongue-and-groove surfaces, and ring connection surfaces. The production process of Low price BL Flange products is mainly divided into three types: forging, casting, and cutting.

　　Cast and Forged Flanges

　　Flanges cast by Low price BL Flange products have accurate blank shape and size, small processing volume and low cost, but have casting defects (pores, cracks, inclusions); the internal structure of the casting is poorly streamlined (if it is a cutting part, the streamlined form is even worse ); Forged flanges generally have lower carbon content than cast flanges and are not easy to rust. Forging costs are higher than casting flanges. Forgings can withstand higher shear and tensile forces than castings.

　　Low price BL Flange products The advantage of castings is that they can produce more complex shapes and the cost is relatively low; the advantage of forgings is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in castings; the difference between casting flanges and forging flanges is from the production process. The difference between flanges, such as centrifugal flanges, is a type of casting flanges. Centrifugal flange belongs to the production flange of precision casting method. Compared with ordinary sand casting, the structure of this kind of casting is much thinner, the quality is much improved, and it is not easy to have problems such as loose structure, pores, and trachoma.