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Posted By Roger Button
Can anyone come up with a definition of the word 'effective' as applied to isolations and especilly when used in the context - "ensuring the isolations are effective"
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Posted By fats van den raad
Roger
As far as I am concerned isolations ahould be "effective in two ways, i.e.
1. Completely isolating the area/equipment to be worked on from any source of energy
and
2. Isolating it in such a way that the energy can not (inadvertently or otherwise)be restored while there is a danger to people working on the equipment
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Posted By Roger Button
fats
Many thanks for your response. That is my interpretation of being 'effective'. By using your definition it is easy to demonstrate that the isolations are effective.
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Posted By Merv Newman
"ensuring effective isolation" is represented by the word "Try" in "Lock, Tag, Clear and Try"
ie having effectively isolated all energy sources an attempt should be made to start the installation in the normal manner (pushing the start button for example)If the installation does not start then you have ensured the effectiveness of your isolation.
You will of course have "cleared" the danger zone before your try, just in case your isolation is not effective
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Posted By David A Jones
There are many ways of describing effective isolation - but I would agree with that provided by Fats
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Posted By P. C.
Take a look at this Isolation Policy/Procedure.
https://www.cfbean.com:42701/Policies/Policies/Safety%20and%20Env%20Policies/Bean%20Isolation%20Policy.doc
Note: MS Word document. If link broken due to wrap, paste full URL to browser.
Regards,
...PC
www.hazmat101.com
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Posted By Peter Batty
Hi, a point to rememeber if the isolation is for something like a motor driving an impellor within a vessel, and the vessel is to be entered (Possible confined space). Please note that unless the shaft is mechanically prevented from movement, the impellor may be pushed within the vessel and the inertia from the free movement of the impellor can cause trapping injuries.
Isolation should include mechanical locks capable of preventing movement, on rotating or similar plant.
Peter
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Posted By neil poyznts-powell
Roger,
Your procedure would also ned to take account of the possibility that their may be residual energy e.g. energy stored within a capcitor and this would need to be made safe!
If it will help I can send you a copy of the Lockout, Tag & try procedure I use and associated TI.
Regards,
Neil
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