The document outlines the work permit system, which provides authorization for specific tasks while ensuring safety protocols are followed to prevent injuries and property damage. It specifies types of jobs requiring permits, such as maintenance, construction, and confined space entry, along with detailed precautions for various types of work. It also delineates the roles of personnel involved in the permit process and the requirements for its validity and surrender upon job completion.

1. WORK-PERMIT
SYSTEM

2. PERMIT TO WORK (PTW)
 A work permit is a document giving
permission for specific work to be carried
out subject to certain stated conditions and
with in a specified period of time
 Safety work permit is a written document
authorizing person to carry out work,
warning them of the concerned dangers and
spelling out the precautions needed for
carrying out the job safely

3. WHY PERMIT TO WORK?
Permit specifies the conditions and
procedure for safe execution.
Basic purpose of permit system is to
prevent injuries to personnel
Maint. Personnel are not adequately
familiar with process conditions.
Operation will determine that it is safe
to perform the designated job.

4. Protect property from damage
 Avoid fire
Ensure that all work is carried out in
safest possible manner.

5. REQUIRMENT OF
PERMIT TO WORK (PTW)
Permit is required for the following jobs :
Major & Minor Maint. work.
Inspection.
Construction.
Alteration.
Process Equip. cleaning
Entry into confined space.
Excavation.
Electrical job.
Height jobs etc.

6. WORK
PERMIT NOT REQUIRED
Routine welding / cutting and similar maintenance /
fabrication jobs carried in Central workshop
Routine sampling for the purpose of laboratory analysis.
Replacement of control card, annunciation card / lamp,
charts, and inking of charts, panel lamp etc.
Watering / gardening work relating to horticulture.
Manual sweeping with or without vacuum cleaners of
plant area etc.
Entry of stores vehicle for loading / unloading of material
/ Chemicals at safe place in the plant.

7. TYPES OF PERMITS
Hot Work
Height Work
Excavation
Vessel/Confined space Entry
Work on Electrical installation
Line Opening

8. HOT WORK PERMIT
Hot work permit is required for any jobs
involving generation of sparks
Hot work : is any work such as welding /
cutting, drilling, grinding, buffing, brazing,
chipping, wall & floor breaking by spark –
producing tools etc that is capable of causing
fire condition

9. VESSEL/ CONFINED SPACE ENTRY
 A confined space is defined as an area, which may or may
not be enclosed. It is large enough and a person can bodily
enter and perform assigned work. It is not designed for
continuous human occupancy. It has got limited or
restricted means for entry and exit.
 i) It is subjected to potential hazards, viz., accumulation of
toxic / flammable gas / vapor, inert gas, oxygen deficient
(<20% v /v ), flooding of liquid, steam or any other
hazardous substance.
 Some of the examples of confined space are oil tanks,
water tanks, condensate tanks, reactors, oil water sewer
pits, tanker trucks, vessels, floating roof decks, ducts, etc.

10. HEIGHT WORKS All types of height jobs 2 m
& above, except those jobs where working
platform with railing and Stairs /Monkey
ladder is provided.
WORK ON ELECTRICAL INSTALLATIONS
All types of electrical jobs in plants including
PCC maintenance, Transformer maintenance
& bus couplers maintenance, Electrical
equipments maintenance.

11. EXCAVATION JOBS
Excavation jobs in company premises
like digging, breaking of
floors/foundations etc.

12. LINE OPENING
The line opening jobs means opening of
any line containing or has contained
any hazardous material by removing
bolts of flanged joints, TC joints, valves
or cutting of lines.

13. WHO CAN SIGN A WORK
PERMIT
Personnel who are authorized to sign on
the Work Permit shall have knowledge
of the work to be performed, hazards
associated with the work and the
conditions under which the work will be
performed.

14. ORIGINATOR OF WORK
PERMIT
Originator is the HOD or Area Incharge of
the department in which job is to be
performed.
Originator is responsible for preparation and
handing over of the equipment/area in safe
condition to perform the work.
Authority to issue all types of work permits is
generally granted to shift incharge level
executive and above.

15. EXECUTING
DEPARTMENT:
 Department who performs the said job.
 Executing (work permit acceptor) department
representative is the engineer shift incharge from
maintenance dept. such as mechanical maintenance /
electrical / instrument /civil etc.
 Executing department representative will check that
all precautions mentioned on the work permits are
taken.
 He will assign the job to technicians/fitters/welders
etc. as per demand of work
 He will detail all hazards associated with the job to the
workers

16. SAFETY DEPARTMENT
Safety department representative will
check that the all required precautions
are taken & are adequate, work location
conditions are as per mentioned on work
permit
Then he will authorize the work permit

17. PRECAUTIONS FOR HOT
WORK PERMIT
 Surrounding area cleared of
Flammable/combustible materials
 Equipment/ Vessel free of any solvents
 Area cordoned off
 Pressure water line/Fire extinguisher available
near workplace
 Arrangement to prevent passage of
spatter/molten metal particles to surrounding
area
 Proper ventilation, illumination & Emergency
Exit is available
 Welding & Cutting equipments inspected
 All required PPEs provided
 Standby person available on site
 Fire watch available for 30 min after
completion of job

18. PRECAUTIONS FOR
HEIGHT WORK PERMIT
 Area below is cordoned off
 Safety belt (Full body harness) & safety helmet is in
use.
 Workers detailed about the hazards associated with
the job
 Suitable ladder/scaffolding provided
 Fall arrest equipments checked
 Equipments/Tools are used, protected from fall from
height
 Lighting, noise & weather conditions are satisfactory

19. PRECAUTIONS FOR
VESSEL ENTRY PERMIT
 Equipment/vessel cleaned, washed & cooled to
room temperature
 All lines connected to vessel are disconnected/
blinded, valves on welded lines are closed, locked
& tagged
 Fuse on electrical main to agitator removed, main
switch brought to OFF position, locked & tagged
 Tank/vessel made free of Toxic, flammable
gases/vapors
 Oxygen content checked by Safety Dept.
Representative, found more than 19.5%
 Combustible gases found nil
 Safety Harness with life line provided
 All required personnel protection provided

20. PRECAUTIONS FOR
VESSEL ENTRY PERMIT
 A standby observer is deputed at man hole
for continuous monitoring & holding the life
line
 Person entering in the vessel detailed about
the hazards associated with the work.
 Keep fire equipment stand-by
 Barricade the area
 A board is displayed at manhole of “Person
working inside the vessel/Tank”
 Allow minimum possible no. of persons
inside confined space

21. PRECAUTIONS FOR
VESSEL ENTRY PERMIT
To ensure positive isolation & maintain
it all through
Ensure adequate ventilation all through
Display copy of entry permit near entry
manhole

22. ELECTRICAL ISOLATION
Before issuing a Work Permit, it is
essential to ensure that the equipment /
facility to be worked on is electrically
safe and electrical power is isolated to
the extent necessary for the safe conduct
of the authorized work.
Issuing, Executing authorities and
Electrical Maintenance shall jointly
decide the extent of isolation required.

23. ‘DO NOT OPERATE’ tag shall be used
when isolation by local switch is decided
as adequate protection.
LOTO (Lock Out Tag Out) System to be
followed.

24.  Material last present in the line is completely
drained & flushed with water
 Verified that line is depressurized
 All valves properly positioned, tagged, blanked
& locked
 Line is disconnected on either end/supply
source
 Personnel assigned the job explained on the job
safe work method
 Area cordoned off, cautionary sign board
displayed
 All required PPEs are provided
 Line tested for flammable vapors by Safety
Dept. representative.
PRECAUTIONS FOR LINE
OPENING PERMIT

25. PRECAUTIONS FOR LINE
OPENING PERMIT
Under ground Service lines (Fire
Hydrant, Electrical cables, Service lines,
Drainage lines) are either isolated or
safeguarded
Cautionary sign boards displayed
Area cordoned off
Proper illumination provided
Area to be excavated is marked

26. VALIDITY OF PERMIT
Work permit will be valid only for time
& date mentioned on work permit..
A fresh permit is to be obtained for next
date
If extension required on same date,
clearance to be obtained from
Originator, Executing & Safety
department. .

27. SURRENDERING WORK
PERMIT
When Job is Completed the work permit
should be surrendered to Originator
department after handing over the
workplace/equipment.

28. DISTRIBUTION OF COPIES
OF WORK PERMIT
White Copy (Original): To be
retained with the person performing
the job
Yellow Copy: To the Safety
Department
Pink Copy: To Security Gate (For
Hot work Only)