How big is the stainless steel flange generally, how to distinguish the pressure level?

How big is the stainless steel flange generally, how to distinguish the pressure level?

The low, medium and high pressure grades of the stainless steel flange divide the pressure limit:

Low-pressure pipeline Nominal pressure not exceeding 2.5 (excluding) MPa

Medium pressure pipeline Nominal pressure 2.5 (inclusive) -6.4MPa

High pressure pipeline Nominal pressure 10-100MPa

Ultra-high pressure pipeline Nominal pressure exceeding 100MPa

Common stainless steel flanges are used in different places, so the pressure level is different to a certain extent. For example, large stainless steel stainless steel flanges are mainly used in high temperature resistant pipelines in chemical engineering, so they have a lot to do with the pressure bearing performance of their materials. high demands. Therefore, forged stainless steel flanges are often required, because the material has been forged to increase the structure density and also enhance its pressure bearing capacity. In domestic and international standards, there are clear grade requirements for the compression resistance of large stainless steel flanges. Large stainless steel flanges are generally divided into: PN25, PN6, PN10, PN16, PN25, PN40 and so on. The most commonly used ones are PN10 and PN16.