By A. W. Cox, Frank P. Lees, M. L. Ang
This record gathers jointly info and data on classifying harmful locations.IChemE, the establishment of Chemical Engineers, is the heart for chemical, biochemical and strategy engineering execs around the world. we're the middle of the method group, selling competence and a dedication to sustainable improvement, advancing the self-discipline for the good thing about society and aiding the pro improvement of individuals. a number of the parts we submit in contain: -Safety within the method industries - the BP technique protection series-Consultancy for chemical engineers-Project administration within the procedure industries-Contract administration within the approach industries - overseas different types of agreement series-Communication talents for engineers
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A discussion of the outcome of these quantitative approaches is given in Section 22. 25 7. LEAK SOURCES AND SCENARIIOS The sources of leaks on process plants considered in this work are the common sources. Process plants contain a quite large number of potential leak sources, but the list given below is believed to cover those which need to be considered here. The zone distances generally used are intended to prevent ignition of typical leaks from these leak sources but they are not sufficient to ensure this for catastrophic leaks.
The comparative study of hazard distances may be used to formulate proposals for relating zone distances to the flammable fluid and its operating conditions. This provides the basis for a more rational approach to the setting of zone distances for one fluid relative to another, but it leaves open the question of whether the current absolute zone distances and definitions are the most appropriate. Work of a rather tentative nature has been done on an ignition model. The purpose of this model is to explore the different types of 24 CLASSIFICATION OF HAZARDOUS LOCATIONS: PROJECT STRATEGY ignition which together determine the overall ignition probability.
Work has also been done within the project on the effect on hazard distances of fluid properties, operating conditions and hole size. Sets of representative flammable fluids and of models for emission, vaporisation and dispersion have been defined. These have been used in conjunction with a set of arbitrarily defined hole sizes to explore hazard distances and to compare the hazard distances for different fluids given in different codes. The comparative study of hazard distances may be used to formulate proposals for relating zone distances to the flammable fluid and its operating conditions.
Classification of Hazardous Locations - IChemE by A. W. Cox, Frank P. Lees, M. L. Ang