Difference between Metric & Imperial Flanges

They are identical in most cases!

  • This table can help you translate

    • imperial: refers to the outside flange diameter
    • metric: refers to the inside diameter

    Example: 1.33 CF flange (=DN 16 CF flange) has an outer diameter of 1.33" (= 34mm) & an inside diameter of 0.63" (= 16mm)