Common flanges are used in different places, so the pressure level is somewhat different. For example, large stainless steel flanges are mainly used in high temperature pipelines for chemical engineering, so there is a high requirement for the material's pressure bearing performance.
Therefore, customers often require forged flanges because the material is forged to increase the density of the tissue and also enhance its pressure bearing capacity.
There are clear grade requirements for the compression resistance of large stainless steel flanges in domestic and international standards. Type stainless steel flanges are generally divided into: PN25, PN6, PN10, PN16, PN25, PN40 and so on.