Such a system is required o to tell people what significant risks they could

Such a system is required o to tell people what

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the Permit-to-Work system (see Appendix 2). Such a system is required:- o to tell people what significant risks they could encounter in the confined space; o to ensure that the elements of the safe system of work are in place; o if there is a need to coordinate the activities of several workers and exclude potential problems posed by the presence or activities of others; o if complex authorizations communications or procedures are required. 'Technical' strategies which are a necessary adjunct to the above, include:- Access: a safe means of entering and leaving a confined space must be provided to ensure that people can get in and out easily. Clear and conspicuous signs to BS 5378 and/or 5499 should be posted alongside openings while work is in progress; Fire Prevention: Fire prevention procedures are of even greater importance than usual when applied to work in a confined space. Keep flammable or potentially explosive materials stored in the confined space to an absolute minimum, and use in suitable containers; do not smoke; take care to eliminate the possibility of static electricity buildup. Control of the Environment: o purging: a confined space which has been used for the storage of a volatile (say, a toxic, flammable or potentially explosive) substance may need to be purged with nitrogen or other inert gas; o ventilation: forced mechanical ventilation may well be necessary to ensure a plentiful supply of breathable air; o isolation: confined spaces may need to be physically isolated to prevent the ingress of substances which could pose a risk to those inside, or electrically and/or mechanically isolated to prevent someone outside the confined space inadvertently putting those inside at risk; Equipment: any equipment for use in a confined space must be suitable for the purpose. This will include:- o testing and monitoring the atmosphere: The nature of the work or the workplace may demand that before entry the atmosphere inside the confined space is tested for oxygen level, hydrogen sulphide, hydrocarbons etc. This will inform decisions about respiratory protective equipment (RPE) and ventilation; --------------------------------------------------------------------------------------------------------------------------------------------- UNIVERSITY OF GLASGOW Safety & Environmental Protection Services 9 Telephone: 0141-330-5532 Email: [email protected] NOTE: PRINTED VERSIONS OF THIS DOCUMENT ARE UNCONTROLLED COPIES AND MAY BE OUT OF DATE. CHECK ONLINE FOR THE CURRENT REVISION.
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o electrical equipment may need to be certified as being safe for use in a flammable atmosphere, and earthed; o RPE and other personal protective equipment (PPE): The type of PPE will depend on the hazards identified, but could include safety lines, and harnesses, head and eye protection, and protective footwear. Designing and implementing an effective RPE programme is a considerable undertaking, and in such situations SEPS must be consulted; o piped gas supplies: at the end of any work period remove any such pipes and close all valves; o communication : if personnel could get into difficulties while out of sight of the main party, or if they must descend far into a confined space, or if the
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  • Spring '14
  • KevinP.Moenkhaus

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