Shell International Trading and Shipping Company limited

PERMIT TO WORK SYSTEM

Objectives

• Understand the philosophy and requirement

• Know when a PTW is required

• Be aware of exemptions in place

PHILOSOPHYPHILOSOPHY

• A permit to Work system provides a systematic approach to safe working.

• Using the PTW system does not in itself make the job safe, but contributes to control measures for safe working.

We need to have a Permit to Work for the following cases:

Hot-workEnclosed space entryUnscheduled workElectrical MaintenanceAsbestosInvasive maintenance of pr. SystemsWorking AloftWorking over-sideDiving OperationsLifting Operations

Hot Work

Class 0 – Workshop – no permit required

Class 1 – Engine RoomClass 2 – Poop , Superstructure 30m abaft of cargo & bunker tanks at main deck level.Class 3 – Main Deck

Enclosed Space Entry

When entering any enclosed space on board the vessel

Any Tank or cofferdam Any void space

Enclosed Space (Machinery) – C/case, Scavenge & Exh. manifolds.Steam side of Boilers and Condensers.

Electrical Equipment

Low Voltage Applies to voltages below 450 V Gives sanction to testNot necessary for routine changing of bulbs (non- Ex)Not required for megger (insulation) testingTesting on the electrical test bench

High VoltageApplies to equipment operating on voltages higher than 450V

No Exceptions

Unscheduled Work

Required for: Any job that has not been discussed at the work planning meeting.

When the job requires the control of another permit then that permit should be issued

Unscheduled continued:

• Cannot be issued in place of another permit

• Not required when the work scope is covered by another permit within the PTW system

Pressurised Systems

Must be issued when working on pressurised systems.

The following exceptions apply:Domestic F.W. SystemsSea Water systems / equipment under 100mm nominal diameter.

Working Aloft

Whenever there is a need to work greater than two metres above deck level

AND

There are NONO Exceptions

Work Over side

• Working or painting on the ship’s hull from staging or boats

• All Diving Operations now have a separate permit. Do not use working overside for this.

It is not required when working outboard of the railings on lifeboats

Rigging or stowing accommodation or pilot ladders.

LiftingWhenever there is a need to lift using

lifting equipment

Exceptions are:Routine in-port storing ops covered by the daily work plan.Use of hose-handling crane for cargo ops.Bunker hose handlingOperations with a single chain block for a load not greater than 1 MTUsing a chain block to spring pipelines back into place

Lifting Continued

Lifting hose strings at an SBM are NOT exempted from the issue of a lifting permit.

Why ?

There may be shore labour involved in the operation.

Definitions

• Permit Issuer : Person who authorises the permit – usually the Master or the Chief engineer

• Permit holder : Person who completes the permit. Supervising Officer or the SSO

Authorising

• Both Permit Issuer and Holder sign the permit after satisfying themselves it is safe to proceed

• The permit holder holds the “Tool Box Talk” with the working party.

• No one is allowed to issue a No one is allowed to issue a permit to himself !permit to himself !

Permit Type Issuer Holder

Hot Work    

Class 1 & 2

Master Or Ch.Eng. SSO

Class 3 GM Shipping Master

Enclosed Space Master Chief Officer

Enclosed Space(Machinery)

Master Or Ch.Eng.

Responsible Officer

Unscheduled WorkMaster Or

Ch.Eng.

Responsible Officer or

Supervisor

Permit Type Issuer Holder

Electrical - High VoltageMaster Or

Ch.Eng.Responsible

Officer

Invasive MaintenanceMaster Or

Ch.Eng.Responsible

Officer

Working AloftMaster Or

Ch.Eng.

Responsible Officer or

Supervisor

Working Over side Master Chief Officer

Lifting Ops.Master Or

Ch.Eng.

Responsible Officer or

Supervisor

Monitoring the PTW System

• Minimum Two Copies Printed– Permit holder copy displayed at the

worksite for ready reference– Permit issuer copy retained by the permit

issuer until cancelled

• After work completion copy to be passed to Chief Engineer for filing

• Retention period for permits is six months

Monitoring continued:

• The permit issuer, Supervisor and/ or the SSO must monitor work including random spot checks

Is the permit displayed?Any need for further precautions?Are controls conscientiously implemented?Does every one fully understand the hazards?

Change In Conditions

• If there is any change in conditions all works MUST immediately stop and the work scope re-assessed

• Examples are:-Specified tools not availableSpecified tools not availableType of work is changing – Hot work Type of work is changing – Hot work required to remove frozen bolts?required to remove frozen bolts?Weather conditions changingWeather conditions changingProcess conditions changing – Unexpected Process conditions changing – Unexpected release of fluid from a nearby flange.release of fluid from a nearby flange.

After Completion

• Has the work been completed

– Equipment returned to “In Service” condition

– Worksite safe and tidy

– All notices and securing arrangements removed

Permit Cancelled

• Work Completed• Permit time expired• Change in circumstances• Work SuspendedCancelling a permit does not mean

that the equipment is ready to start – It may still be under the control of separate permits

Recap FAQ

1. Name the exceptions to the Lifting Permit

Single block – weight up to 1 tonHose operations in port – cargo /

bunkersNormal Storing (if included in plan)

including OPL operations.Springing pipelines in place using

blocks

Recap FAQ

Vessel is at sea

Job is : Routine changing of manifold bobbins, blanks, reducers etc:

• Is a permit required or not?

YES!

Recap FAQ

• Hose connections at an SBM

• Work Permit Required or Not?

YES!

Storing

• Operation Involves lifting from the work boat to the deck and then to the Engine Room shortly thereafter.

• Lifting permit – Yes / No

Not if included in the Daily Work plan

FAQ• Can the CPO be the Permit Holder if issuer is

the Chief Engineer?YES

• A job entails the use of grinding or abrasive tools – Is a hot work permit necessary?YES – If the job is to be done outside the workshop.

• If master is the holder should C/E be informed of unscheduled work being carried out?Yes in order to ensure safeguards are in place.

ContractorsThe normal sequence of events will be:• Met at gangway and signed on board• Escorted to meet master or Chief Engineer –

will issue work order and contractor safety letter.

• Work permit printed and explained to technician

• Responsible member to accompany technician – ensure all guards & notices are in place. Responsible officer then completes and signs the permit before taking it to the Master / Chief engineer for issuing

FAQ

• Can the C/O & 2/E administer, issue and subsequently close out permits relating to their own departments?

No! Issuer must be C/E or Master

FAQ

For an enclosed space entry permit – can someone other than the C/O check atmospheres and act as permit holder?

Unfortunately Not. It must be the Chief officer

FAQ

What permits will be required for overhauling a main engine unit?

1. Lifting2. Invasive pr. systems3. Enclosed space (machinery)

FAQ

Can a person work on live bus bars (Low Voltage) with insulated gloves?

No!

If a fitter runs out of gas in the middle of a job does he require a permit to change the bottle?

No!

FAQ

Name the permits required if an overhead Sea Water pipe 200mm in dia has to be weld patched.

Working aloft, invasive and hot work

What permit if any is required for change over and cleaning of main engine hot fuel filters?

Yes – Form 606 to be completed.

FAQ

Purifier Cleaning – Any Permit ?• If it has an integral pump no permit

required.• If external pump then yes permit

required to ensure proper isolation.

Cleaning aux boiler burner?Yes Form 606 to be filled.

Special Considerations

When in watch keeping mode permit for filter cleaning and change overs can be issued by the Senior watch keeper on duty.

During UMS the duty engineer must call the chief engineer in case a permit is required for a particular job.

FAQ

• A mainmast bulb has suddenly fused and has to be changed – what permits are required?

• Unscheduled• Electrical• Working aloft

Working aloft only – This replaces the need for an unscheduled permitElectrical permit is not required for changing bulbs on 110 / 220 v systems.

Emergency Situations

• In case of an unexpected situation such as a broken cooling water bellows on a running main engine do we need to fill out the required permits before starting work?

• No! The process of putting the required defences in place should be automatic.

THANK YOU THANK YOU

FOR YOUR TIMEFOR YOUR TIME