PERMIT TO WORK
Dec 17, 2015
PERMIT TO WORK
Permit to work salient featuresFOR WHOSE SAFETY ??Acceptors Person doing the Job & People around
WHY A WRITTEN DOCUMENT ??To ensure Accountability and Responsibility
NOT MERELY A PIECE OF PAPER !A check list only as good as the people following it.
WORK PERMITMAY SAVE A LIFE OR CAUSE DEATH !
Types Of PermitPermit To Work (Cold work)
Hot Work Permit
Vessel Entry Permit
Excavation Break-in Permit
Scaffolding Permit
DefinitionsISSUING AUTHORITYOwner with operating controlAuthority given after formal validation Knowledge of operating area and permit system
RECEIVING AUTHORITYResponsible for execution of specified jobAuthority given after formal validation Knowledge of operating area and permit system
ACCEPTORAny Permanent employee - Nominee of the Executor / Receiving authority
ResponsibilitiesISSUING AUTHORITY Ensure proper IsolationsMake the job safe, specify the residual hazards & precautions.Determine scope, effect - Ensure plant conditions remain unchanged.Convey residual hazards & precautionsEnsure Cross referencing of Permits
RECEIVING AUTHORITYFully understand the job, residual hazards & precautions necessary to carry out the job..Compliance of scope Scope remains unchangedEnsure compliance by his team - ensure that requirements set forth in PTW are followed by all personnel under his controlUse Correct / Inspected Tools / tackles for the job
PTW Where Required ??Permit to WorkAll Jobs Valid for 7 days (Max) Extendable upto 7 days (optional feature, as per situation)Hot Work PermitAll welding / cutting / grinding / drilling jobs Valid for 24 hrs (Max)Vessel Entry PermitAll confined spaces entry (1 meter depth, Hazardous fumes, oxygen deficiency) Not normal operating area Valid for 24 hrsExcavation PermitAll excavations, break-ins. Valid till any declared date.Scaffolding PermitAll scaffoldings. Valid till scaffolding exists
Permit To Work CharacteristicsAgreed workInformation for all concernedIdentified equipment / jobSpecified PrecautionsAll foreseeable Hazards identifiedFormal hand over of control of AuthorityDiscussion between Issuing & Receiving authorities
PTW RequirementsWork is not a modificationJoint site visit - MandatoryClear definition of the workStated precaution are complied withRevalidation within one hourPermit validity 7 days (Max)Issuance through signing-off Change of intent - New permitJob completion / Final Check - Area OperatorDe-isolation - Sequence
Lockout / Tag outControl of Hazardous EnergyElectricalMechanicalThermalPressureChemicalKinetic / Gravity
Prevention of injuries caused by release of Hazardous Energy
LockoutLock device applied to energy control point
A positive means to secure isolation point
Individual responsible for own lock & key
Preferred method
TagoutTag device applied to energy control point
Used in conjunction with Lockout
Used when Lockout not feasible
Name, date, time, purpose, etc.
Performing Lockout/TagoutPreparation Identify the energy source(s)Determine how to control the energyDissipate residual energyBlock components subject to movement
Shutdown EquipmentFollow normal stopping proceduresAllow motion to stop
Applying Lockout/TagoutClose or shut off all energy sources
Apply locks and/or tags
Verify isolation - TryTry the switchTry the start button
Contractors may need assistance or procedures to identify all energy sources
Removing Lockout/TagoutRemove tools and equipment
Replace guards and covers
Check for all clear
Remove your locks and tags
Other locks & tags may remain
Notify responsible party of completion
Hot Permit RequirementsAll combustibles to be removedSpatters to be controlledArea to be cordoned off and person to monitorFlammable atmosphere LEL testIn case of risk arrange fire watchValidated and tested welderWelding plant and cables conditionUse ELCB for grinder etc inside vesselSpecial care while working on fiberglass, cold sticker etc.
Vessel Entry Permit (Confined Space Entry)DefinitionLimited means of entry or exitNot intended for human occupancyMay / could contain a hazardous atmosphereContains engulfment or entrapment hazardsContains other hazards
Tanks, vessels, storage hoppers, pipelines, manholes, tankers, bins, excavations, etc.
Atmospheric HazardsOxygen Deficiency / Enrichment - below 19.5% or above 23.5%
Flammable / Explosive - LEL above 5%
Toxic - above PEL, unknown, or IDLH
Control with testing, ventilation, and/or PPE
Confined Space PermitsFacility issued
Contractor issued
Supervisor prepares
Sign In / Out
Atmospheric testing
Hazard controls
Renew when expired
Other HazardsHazardous Energy - Lockout / Tag out
Electrical, Thermal, Mechanical, Pressure, Chemical
Entrapment - plan for avoidance and retrieval
Engulfment - plan for avoidance and retrieval
Rescue - plan for retrieval, must have Attendant and communications
Entrants, Attendants and SupervisorsEntrantsEnter the spacePerform the workExit on Attendants ordersSupervisorPerform air monitoringControl other hazardsComplete permitAttendantsBe present continuouslyMaintain headcountMaintain contact with entrantsOrders evacuation, activates rescuePrevent unauthorized entry
Confined Space VentilationPositive - blowing air into the space, exhaust is through openings
Negative - pulling air out of the space, exhaust is through blower
Explosion-proof equipment if needed
Purging / Inserting - inert gas (nitrogen, carbon dioxide, argon) used to replace oxygen atmosphere in space for HOT work
Special Equipment - Confined Space EntryFull Body Harness often requiredLifeline (Retrieval Line)Mechanical Retrieval System - required for vertical entries exceeding five (5) feetFall Protection AnchorageTesting metersOxygenCombustible gasToxic chemicals
Scaffolding PermitErected by Competent Person
Sound, rigid footing
No overloading
Scaffold Grade Planking
Railings / toe boardsTie-Off if no railing
Access ladders
Get down from rolling scaffold to move it
No portable ladders on scaffolding
Fitness certificate in place
For further explanation regarding isolation of plant & equipment from hazardous materials refer to construction/shut down safety module