ISO 12499 pdf download

ISO 12499 pdf download.Industrial fans — Mechanical safety of fans — Guarding 1 Scope This International Standard specifies requirements for the mechanical guarding of industrial fans. The circumstances under which safety measures shall be taken are described and information on how hazards can be reduced or eliminated is given, along with guidance on safety practices and information for use. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3864:1 984 1 ) , Safety colours and safety signs. ISO 1 3349: — 2) , Industrial fans — Vocabulary and definitions of categories . ISO 1 3852:1 996, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs. ISO 1 41 20: — 2) , Safety of machinery — General requirements for the design and construction of guards (fixed, movable). 3 Definitions For the purposes of this International Standard, the definitions given in ISO 1 3349 and the following definitions apply. 3.1 industrial fan any fan used for industrial purposes, including the ventilation of buildings and mines but excluding ceiling, pedestal and similar circulation type fans such as those commonly used for non- industrial purposes 3.2 normal operation operation when the fan impeller is rotating and the fan is fulfilling its designed function of moving air 3.3 ancillary operation operation when the fan impeller is stationary and all power to the fan has been disconnected to allow such activities as maintenance, cleaning, adjustment or troubleshooting to take place 3.4 windmilling rotation of a fan impeller induced by flow across the impeller 3.5 hazard source of possible injury or damage to health 3.6 hazardous situation any situation in which a person is exposed to a hazard or to hazards 3.7 personal injury hurt caused to or sustained by a person as a result of mechanical hazard 3.8 risk combination of the probability and the degree of the possible injury or damage to health in a hazardous situation 3.9 danger zone danger point any zone or point at or near the...