copyright © 2005 by the sea group integrated body and respiratory protection a practical...
TRANSCRIPT
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Integrated body and respiratory protection
A practical demonstration
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Background
In this test, we want to:• Examine how to provide effective protection using various
types of PPE– Gloves
– Suits
• Compare the protection efficiency of two very different protective suits
• Explore the importance of pressurisation
• Identify the issues associated with decontamination & safe removal of contaminated PPE
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A Word on PPE
• High standard of protection expected
• Simple to use
• Recognise limitations
• Training to match hazards
• Last line of defence
• Sometimes PPE is only option
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Important:
This is not a scientific experiment — rather an informal way of exploring some basic aspects of personal protection equipment against hazardous substances
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Equipment
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Gloves Used
• Standard disposable gloves
• Best nitrile
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Safe Glove Removal
• Grasp glove below cuff• Peel down• Insert finger under other
cuff• Peel 2nd glove off
• "Dirty to Dirty - Clean to Clean"
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Suits used• Simple, off-the-rack
handyman’s suit• Tyvek® material• Welded seams• Negative pressure
respirator• Not taped• Not pressurised• Disposable
• Pressurised suit• Double hoods• Tyvek F® material• Welded seams• Positive pressure
respirator• Taped• Pressurised• Disposable• Integrated (i.e.
respirator and suit designed to be used together)
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Contamination chamber
• Simple upright tent, designed as shower tent at camping grounds
• Plastic pool for collection of waste water
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Contaminant & detection agent
• Fluoresceine — a common substance with many uses, e.g. in plumbing to detect leaks
• Glows under UV light
• Dispensed as aerosol from 4 nozzles inside the tent
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Tests
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Gloves
• Don gloves
• Clean small liquid spill using a sponge
• Remove gloves
• Test for contamination using black light
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The test begins
A white inner suit is used for easy detection of any contaminant leaking through outer suit
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Don mask & outer suit
Simple suit with negative pressure respirator
Pressurised suit with positive pressure respirator
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Taping(Pressurised suit only)
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Major differencesSingle hood Double hood
Negative pressure Positive pressure
No taping All joints taped
Not pressurised Pressurised
Loose gloves Integrated gloves
Socks & boots Integrated inner booties
Suit in bootleg Protective skirt over bootleg
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How pressurisation works
• When user does not need air (e.g. when breathing out), clean air is channelled into the suit instead of the respirator
• The suit inflates at every exhalation
• A slight positive pressure is maintained within the suit at all times
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Test procedure
The test procedure is exactly the same for both types of suit:
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Enter chamber
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Seal chamber
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Switch on contaminant
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Start exercise• Duration: 5 minutes• Movements:
squatting, straightening, twisting
• Follows part of NFPA approved exercises for protective suits
• Designed to stretch, pull, inflate, deflate suit
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End of exposure
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Decontamination
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Examination
• The protective suit is carefully removed
• Inner suit is examined in a darkened room under UV light
• Any trace of contaminant on the inner suit glows bright yellow-green
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See for yourself
Now let’s go and do some real-life, practical exercises!
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Results
(of this test only)
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ResultsSimple suit Pressurised suit
(Click on each image for larger picture)
Conclusion…
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Results
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Results
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Results
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Results
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Conclusion