| Summary: | In 2006 the EN 14491 was published (EN 14491, 2006). This European Standard specifies the basic requirements of design for the selection of a dust explosion venting protective system. Thepresent paper will explain the significant changes between the new revised European Standard and the previous one (EN 14491,2006) which are as follows: (1) Additional Information and requirements for pneumatic conveying of the product with axial or tangential release into vessels and silos. (2) Additional Information and requirements on free fall filling of product from e.g., rotary air locks or screw feeder into vessels and silos. (3) Additional Information and requirement on the effect of vent ducts upon the reduced explosion overpressure. (4) - Additional information of flame and pressure effects outside enclosures. (5) - Information on the influence of the filter elements on the explosion venting has been added. (6) - Information on the design of explosion venting of cyclones has been added.
The changes in this standard refers to changes regarding the previous standard, which add new or modify existing technical requirements, in a way that new options are given, but without increasing requirements for equipment that was fully compliant with the previous standard. Therefore these changes will not have to be considered for products in conformity with the preceding edition.
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