Rank: New forum user 
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I am a QHSE consultant working in abu Dhabi. I want to know the cases where permit to work can be applied??. i appreciate if someone can explain the difference between permit to cold work and permit to hot work.
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Rank: Super forum user 
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Rank: Super forum user
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Mohd, a permit for hot work would be used when there's a risk of fire or smoke ingress. Usually welding or something like that.
I'm not aware of a cold work activity, just an environmental hazard. Also not aware of permits that are used for thse conditions.
Hope this helps?
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Rank: Super forum user
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Mohammad
A permit to work (PTW) is simply a safe system of work that is recorded. I have worked most of my life in the power industry and PTW is a standard process.
PTW is normally (though not always) applied to control significant risk, so if we take your example of a hot work permit....this is specifically intended to control the fire risks of some form of hot works, welding, gouging, etc. It is in many ways an extension to a method statement but with specific controls, sign off, authorisations and checks that the control measures stipulated are in place and maintained.
There are numerous PTW types, hot works, work at heights, confined spaces, electrical work to name a few. As you will see, these tend to be high risk activities.
PM me with your email if you want some sample PTW's.
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Rank: Super forum user 
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I can't add too much more to what Jonty has said.
I would say that a PTW is usually used for certain high risk work, where the precautions are often more complex, where the work of several workers needs to be co-ordinated to ensure safety or to ensure that equipment has been restored to a safe condition. They are generally used to reinforce the Safe System Of Work.
I am not aware of a cold work permit (although they may be used in certain processes of which I am not aware) but hot work permits are used to control the risks from 'hot works' such as welding/brazing/grinding/paint stripping (using blow torches)/etc
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Rank: Forum user
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One caveat - PTW for high hazard work must only be given after an on-site inspection has confirmed that all specified precautions have been and will be taken.
Thus only ever signed on-site, never in an office.
Permit is good for a limited duration only, e.g. good to the end of current shift If work must continue after shift change then the PTW must be countersigned by incoming supervisor.
Merv
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Rank: Super forum user
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Agree entirely with canopener and merv!
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Rank: New forum user
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A work permit system is a formal written system to control certain types of work when these are identified as potentially hazardous. The terms "P.T.W.", "permit" or "work permit" refer to the form used in such system which is used by a company to meet its needs. These systems aim to ensure proper planning and consideration are given to the risks involved in a particular job, at a specific time and place, with designated precautions.
It is usually categorized in "hot" work permits and "cold" work permits. Hot works are those where there is a potential of generating fire or extreme heat, cold ones are all the others.
I hope that this helps
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