Flange Dimension Mm May 2026

The total width of the flange from one outer edge to the other.

European standards use "PN" (Pressure Nominal) to categorize pressure ratings. PN16 is one of the most common for water and general industrial applications. Outside Diameter (mm) Pitch Circle (PCD) (mm) Bolt Hole Dia (mm) No. of Holes flange dimension mm

The distance between the centers of opposite bolt holes. This is the most critical measurement for ensuring two flanges can be bolted together. The total width of the flange from one

Japanese Industrial Standards (JIS) are prevalent in marine and Asian manufacturing. The "10K" rating roughly corresponds to a medium-pressure application. JIS Flanges - Wellgrow Industries Corp Outside Diameter (mm) Pitch Circle (PCD) (mm) Bolt

The ASME B16.5 standard is widely used in oil, gas, and petrochemical industries. While originally imperial, these are frequently converted to metric for global projects. Nominal Pipe Size (NPS) Outside Diameter (mm) Pitch Circle (PCD) (mm) Bolt Hole Dia (mm) No. of Holes 1/2" (DN15) 4" (DN100) 6" (DN150) 12" (DN300) Data sourced from ASME B16.5 Charts and Pipefitting Web.

When looking up dimensions in a table or measuring a physical flange, there are five primary metrics to identify: