Large Size Black Steel Threaded Flange is higher than casting flange. Forging than the casting can withstand a higher shear and tensile force. The advantage of casting is that it can produce complex shape and low cost. The advantage of forgings is that the internal structure is homogeneous and there are no harmful defects such as porosity and inclusions in the castings. Different from the different casting and forging flanges, For example centrifugal flange is a kind of casting flange.