Work permit system According to OISD 105

 Work permit system is used in industries so that a person working in hydrocarbon processing/handling plant can work safely and do not get harm to its life and and the property. in short it is used so that a person can work safely 

Type of Work permit

Work permit are of 5 types-
  • Cold work permit
  • Hot work permit
  • Confined space entry
  • Composite permit
  • Electrical isolation and Energization permit
  1. Cold work permit- opening process machinery, blinding & deblending, tightening of flanges, hot bolting, inspection, painting etc. These are some of the work that falls under Cold work permit. It requires two copies in these two copies the original document should be yellow in colour and the copy should have Printed Yellow in colour in Copy  document.
  2. Hot Work permit- Work like grinding , welding and many such work are consider in hot work permit, entry and operation of petrol and diesel driven vehicle also comes under this permit. in this work permit three copies are made the original one is in pink colour and the remaing have written copy in pink colour and the original is issued to the receiver and the copies are given one to fire and safety section and one retained in the book.
  3. Confined space entry- This permit is required when a person is entering in the vessel, boiler or in such things. it is also applied on excavation having 1.2 m deep or entering in floating roof tank which is more than 3m down from top. it also applies three copies the original one is in different colour from hot and cold work permit.
  4. Composite work permit- Composite work permit are those which is applied on those work like entering the confined space and working hot work or cold work.


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