Permit To Work

• A permit to work system is designed to ensure that all necessary actions are taken before,during,and after most of task on plant.

• Permit to work are formal documents specifying the work to be done and precautions to be taken. work can only start when safe procedures have been defined and put in place.

• The permit provides a clear written record, signed by responsible person, that all foreseeable hazards have been considered and all necessary actions have been taken.

Why we need Permit to work?

• Assess risk

• Control risk

• Minimize risk

• Control work stage

• Written/legal document defining a safety

system of work

• Signed by responsible

Purpose

• All work activity, the hazard involved and

precaution to be taken are defined prior to

execution of work.

• All activity are coordinated to provide safe

working environment for all personal

working on around installation under

operation.

Do we need permit for every task on site ?

• Certain routine tasks, which do not create any potential hazard to personnel, equipment, or the Site, may not require a Permit. Such tasks shall be listed by the Commissioning Manager for all areas under his control.

• These listed tasks must be covered by detailed Procedures or Job Safety Analysis to ensure safe performance and must have written approval from the Commissioning Manager for all areas under his control.

for instance: vibration monitoring, temperature measurement, hot bolting activity, solo run test, repair and lamp replacement, transformer check, inspections and checking of air fin coolers for noise, greasing, check and calibrate control valve, check and verify alarms, burners flame scanners.

Type of main Permit

• Hot Naked Flame:

• Hot

• Cold

Complementary permit• Entry to Confined Spaces *this includes Vessel Entry.

• Radiography.

• Excavation.

• Process or Mechanical Isolation.

• High Voltage Electrical Isolation.

• Sanction for Test.

• Low Voltage Electrical Isolation.

• Limitation of Access

Main Naked Flame MF

• Any work involving equipment giving rise to a definite source of ignition.

Oxy-acetylene gas cutting

Gas welding, electric-arc welding

Electric-arc welding, Propane torch heating And burning, Grinding, use of a hot-air gun And certain stress relieving Equipment for piping(PWHT)

Main Hot MH• Any work involving, or giving rise to, a

potential source of ignition.

Using non-intrinsically safe equipment

for instance: lap top, Mobile phone, Camera with flash, drilling

machine

Opening of explosion proof fittings in hazardous

areas

All electrical work, unless the equipment is

fully isolated ,Insulation activity when is require

drilling machine

Main Cold MC

• All work that is not covered by the Main

Hot Work Permit and Main Naked Flame

Permit described Pervious pages.

Erect/dismantle scaffold (No vehicle entry),

Touch up, paint with brush ,Bolt tightening,

Blinding/De Blinding,

Complementary Permit

There are 8 Separate complementary

• Process or Mechanical Isolation.

• Entry to Confined Spaces *this includes Vessel Entry.

• Excavation.

• High Voltage Electrical Isolation.

• Low Voltage Electrical Isolation.

• Sanction for Test.

• Limitation of Access.

• Radiography.

Process or Mechanical isolationProcess Isolation: means Valve Isolation, can be

achieved using a combination of the following:

• Single valve isolation: Only for short duration when there is no

alternative ,an acceptable isolation method if the equipment to be worked

on less then 40 bar pressure and non toxic, at ambient temperatures.

• Double block: Nipples,nozzels,vents,drain,etc not used for routine

operation must be capped or blanked off. For connections need frequent

routine operation and sampling, must have double valve isolation

• Double block and bleed: A typical assembly is vented spool-

piece section of line between two block valves

• Double, double block and bleed isolations

Mechanical isolation: means Positive isolations, physical

disconnection

• Physically disconnections

• Blinding/de-blinding or spading/de-spading

Remember mechanical isolation can not be done until

adequate process isolation done completely.

Vessel entry: isolation requirement for entry Inside vessels

Or Confined spaces is by physical disconnection. if this is not practical

then spading is acceptable as an alternative.

Remember mechanical isolation is mandatory for vessel

entry and Work involving naked flame

Work involving naked flame: if welding involved, then

spading plus physical disconnection is required.

Tagging philosophy

Process Isolation, valve must labeled by Yellow tag and for Mechanical Isolation labeled Red tag these tags must filled up properly including:

• Valve/equipment No.• Description• Permit No.• Complementary No.

• Name of operator

• Date

Confined Space entryA confined space is defined as a space:• Is large enough for an employee to enter and perform

work,

• Has limited or restricted means for entry or exit,

• Is not designed for continuous human occupancy, (tanks, vessels, pipes, sumps, or pits)

• area from which escape could become difficult

REMEMBER: Mechanical isolation is mandatory for confined space entry

This complementary permit valid only for only (12hours) if work under this permit continue beyond 12 hours a new permit must be issued.

High or low voltage Isolation

This Complementary permit is required to work under safe

conditions on normally energised equipment. This can be

High voltage or Low voltage electrical isolation.

High voltage from 33 to 6kv (In this refinery)

Low voltage less then 400V

This Isolations Can be done only by authorized electrical person

This complementary are normally valid for duration of related Main

Permit.

Remember Push Button is not acceptable as Electrical

Isolation

Tag Out/Lock Out System

• A summery of all electrical energy sources and associated electrical isolation devices, these must be identified and isolated in order to achieve a zero energy state prior to the performance of any specified maintenance, inspection or construction activity.

• This padlock shall not be removed till relevant permit cancelled and completed.

• The only person could removed padlock is SAEP/AEP (Senior Authorize Electrical Person/Authorized Electrical Person).

• Each substation operator is responsible for implementing ,monitoring and auditing the lockout process

Sanction for test

This complementary Permit is required to test

individual or multi-discipline items of equipment.

it allows for temporary removal of safety

isolations and provision of temporary actions to

override or remove equipment to carry out such

tests. Sanction for test valid only for one shift

incase of extended they have to apply another

one.

This complementary valid for only one shift

Limitation Of Access

• This complementary Permit is required to work

any area close to live electrical system or

equipment. A limitation of Access is not required

where the work to be performed is already

covered by any other permits and isolations, and

shall be authorized by Senior electrical persons.

1-Task supervisor:Initiate permits.

Define scope of work.

Ensures that persons working under his all

control comply with permit condition at

time.

2- Area authority:Authorizes to work go ahead

Define plant status for work.

3- Area operator:To check ,sign and tagged isolations

4-Permit Controller:Checking of permits before issue.

Ensure no conflict of work between area authorities

5-safety Authority:Audit and inspection working practice

6-Senior authorize electrical person (SAEP):

Performs electrical isolation

7-Senior panel operator:Applied required inhibits on fire and gas

and

ESD systems for work to be proceeded.

Permit Life Cycle

INITIATION / PREPARATION

OF PERMIT TO WORK

LIST OF EXTERNAL REQUIREMENTS SUCH AS:

SAFETY EQUIPMENT, STATUS OF PLANT, NEED

FOR COMPLEMENTARY PERMITS ETC

PERMIT AUTHORISATION,

ISSUE AND ACCEPTANCE FOR

WORK TO START

PERMIT REVALIDATION,

SUSPENSION OR

CANCELLATION ON

COMPLETION OF WORK

Initiator/Task supervisor

IMPORTANT

• It is strictly prohibited for the same person to sign as

Task Supervisor/Work Organiser and as Authorizing

Authority.

• New permit application have to be at permit office

before17:00on the day before work required to start.

• Dayshift permits must be at permit office by 18:30

or they shall not be revalidated for the following day.

Safety Requirementsto be completed by Safety Authority

and checked by HSE supervisor prior commencing task

Plant Status RequirementsDefine by Area authority And Area operator Ensures any

required equipment status including isolations are in due

place.

Fire and Gas ,ESD System

RequirementsDefine by Area authority and perform safety system

override by senior panel operator

Complementary Permitsto attach required complementary by Initiator and Area

Authority to check and confirm

Authorization Area authority the work to proceed and Permit

Controller check the permit and the work may proceed.

Validation

Cancellation

• Authorized Gas Tester to perform gas test prior commencing task.

• If task suspended or incomplete with any reason Task supervisor to declare reason of suspension.

• Work party to filled by Task supervisor prior enter to restricted area.

Distribution

• White (Top) Copy, in permit office

• Green copy, with Safety Authority form checking of continuous compliance

• Pink Copy, kept at the work site, on display, for

duration of activity

• Yellow Copy, with Area Authority for checking of continuous compliance

The Main Work Permits are valid for maximum 7 consecutive days

Thank you for your

attention.