Download PDF by Nigel Hirst, Martyn Ryder, Mike Brocklebank: Containment Systems: A Design Guide

By Nigel Hirst, Martyn Ryder, Mike Brocklebank

This is often the one ebook that covers containment, in particular for the method industries. This advisor covers the diversity of containment gear from basic air-flow regulate units to enclosures that limit exposures to good under a microgram consistent with cubic meter averaged over a operating day. the choice of a selected containment approach for a selected move operation will be tricky due to the broad selection on hand. This consultant presents a established method of the choice technique.

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A suitable and sufficient assessment comprises a detailed review of procedures and practices associated with the handling of hazardous substances, with the object of ensuring that unnecessary exposures are eliminated or controlled. Regulation 6, as outlined in Chapter 2, has covered the basic requirements of an assessment and the following provides more details on how to carry one out. An assessment of the risks to health posed by chemicals requires: 24 OCCUPATIONAL HYGIENE ASPECTS OF CONTAINMENT 9 collection of information on the: tasks; substances; existing controls; 9 observation of the activities; 9 discussions with personnel carrying out the work; The assessment provides a systematic approach for managing the risks from chemicals and identifies priorities for: 9 controls (see page 10); 9 maintenance, examination and testing of existing controls; 9 air monitoring.

22 Occupational hygiene aspects of containment Purpose The purposes of this chapter are twofold: 9 to define commonly used terms relating to hazardous materials; 9 to outline the occupational hygienist's approach to the identification and control of hazards. Contents Introduction Assessment Work activities Substances Exposure limits Controls Observations and discussions with personnel Forming conclusions and making recommendations Measurement of airborne contaminants Sampling for particulates on personnel Sampling of gases and vapours on personnel Direct-reading devices Analysis of samples Hierarchy of controls Substituting less hazardous process, equipment or material Engineering controls Administrative controls and modifications to work practices Personal protective equipment (PPE) Factors affecting proper selection of controls Properties of substances Quantities and frequency of use (exposure pattern) Installation, operation and maintenance costs Employee factors Conclusion 24 24 25 25 26 26 27 30 30 31 31 31 32 32 32 32 33 33 34 34 34 35 35 35 23 CONTAINMENT SYSTEMS Introduction An engineer designing a process plant will need to identify whatever means are appropriate to prevent or control exposure of people to hazardous materials.

Diffusive sampling relies on the natural process of diffusion for the collection of contaminants. Diffusive samplers are precisely engineered so as to ensure uniform collection. The samplers can take the form of badges or tubes, similar to those used for active samplers. In the majority of cases, the collected material must be analysed away from the sampling area. Direct-reading devices These are portable or transportable devices that can provide a direct read-out of the total amount of airborne contaminants or the amounts of specific components present.

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Containment Systems: A Design Guide by Nigel Hirst, Martyn Ryder, Mike Brocklebank

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