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About This Item


Full Description

This International Standard specifies size designations for industrial fans and specifies dimensions for the circular and rectangular flanges of general purpose industrial fans as defined in 3.1 .1. It does not apply to cross-flow fans, or fan appliances used for household or similar applications.

For circular flanges, this International Standard provides two different flange series, one for standard casing thicknesses and a second for heavy duty fans as used on board sea-going vessels or in heavy industry.

In order not to restrict fan designs unduly, only the pitch diameter, hole numbers and hole diameters are standardized. Flange thickness as well as internal and external flange diameters can be chosen freely within the limits of good engineering practice.


Document History

  1. ISO 13351:2009

    Fans - Dimensions

    • Most Recent
  2. ISO 6580:2005

    General-purpose industrial fans - Circular flanges - Dimensions

    • Historical Version
  3. ISO 13351:1996


    Industrial fans -- Dimensions

    • Historical Version