10.2.1 Mechanical Isolation Certificate
This Certificate is shown in Appendix 3 the use of the Certificate in the isolation process is covered in 6.5.1. A brief description of its use is given below:
Application - Box 1
Box 1 is to be completed by the Permit Applicant, giving the details of the job and the covering Permit number.
The Box marked ‘Work Continuing on Permit No’ is to be used when a Permit passes its expiry date, but work will continue under a new Permit allowing the Isolation Certificate to be transferred to a new Permit.
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Reason for Isolation - Box 2
The Permit Applicant is to write here the reason why the isolation is required.
Details of Isolation - Box 3
The Responsible Supervisor is to write in Box 3 the details of all isolation points, indicating whether valves are to be open or closed, and places where spading or disconnection is required.
Isolation - Box 4
The Responsible Supervisor shall sign Box 4 to authorise the Isolation. The Area Authority shall sign Box 4 when the Isolation is complete.
De-Isolation - Box 5
The Permit Holder shall sign Box 5 to request de-isolation. The Area Authority shall then sign to authorise isolation. Once the isolation is complete, the person who did the de-isolation shall sign this box to show that de-de-isolation is complete. He should also complete the
“De-Isolated position” box to show the “as left” status of the valves.
De-Isolation For Test – Reverse of Certificate
On the reverse of the Mechanical Isolation Certificate is a sheet for use when De-isolation/Isolation for Test is required (see 7.10)
Extended Period Isolation (EPI) - Box 6
This box is to be used when isolation is still required after its associated Permit is cancelled.
The “EPI ON” Section is signed to authorise the EPI when a Permit is to be cancelled, with the Isolation remaining.
The “EPI OFF” Section is to be used when work can continue, and the Isolation Certificate is to be attached to a new Permit.
10.2.2 Confined Space Entry Certificate
The Confined Space Entry Certificate is shown in Appendix 5.
A Confined Space Entry Certificate is required whenever entry is made into vessels or other confined spaces where there may be:
Toxic or flammable gases or vapours, or
Oxygen content of the atmosphere < 20% by volume.
A Confined Space Entry Certificate is valid for no more than 12 hours. If the work takes longer than this, a new certificate is to be raised each 12 hours. The first certificate to be authorised by the Responsible Supervisor, but later ones can be authorised by the Area Authority.
If a Confined Space Entry Certificate is required for a long protracted activity, e.g. major tank repair. The CSE can be issued for the duration of the task with the following provisos:
A full physical isolation is in place before any entry takes place
The isolation remains untouched until the whole activity is complete
All the requirements of Box 2 of the CSE certificate remain in place.
A gas test of the tank atmosphere is carried out at the start of each shift before any entry takes place; full gas testing remains ongoing during the activity. The results are recorded on a gas test record, or an additional gas test record.
There are no changes to stand by personnel
If there are any changes to the above, a new CSE certificate is required.
A brief description of the use of the Confined Space Entry Certificate is given below:
Application - Box 1
Box 1 is to be completed by the Permit Applicant, giving the details of the job and the covering Permit number.
Safety Precautions Required - Box 2
This is a list of items to be checked by the Responsible Supervisor / Area Authority before anyone enters the Confined Space. The Responsible Supervisor / Area Authority sign this box to indicate that all necessary precautions are in place.
Gas Testing - Box 3
Immediately before first entry to the Confined Space each day the Area Authority is to test the space for Toxic and Explosive Gases/Vapours and for Oxygen Concentration. The results of these tests are to be written in Box 3 of the Certificate.
Further testing during the day can be done by any Authorised Gas Tester.
Authorisation - Box 4
Once he is satisfied that the Confined Space is safe to enter, the Responsible Supervisor/Area Authority is to complete Box 4 to define the period for which the Certificate is valid, and then authorise the entry to proceed.
Copies of forms in the pad are not in the same sequence as other Certificates. The top copy is Green and the second copy (worksite) is Yellow. The back of the Yellow copy has boxes to record additional gas tests, and to record the entry and exit of personnel to and from the confined space.
10.2.3 Additional Gas Test Record
The Additional Gas Test Record is shown in Appendix 5.
This Certificate is to be used as a continuation sheet when Box 8 of a Permit, or the Gas Test Record on a Confined Space Entry Certificate, is full.
10.2.4 Radiography Certificate
The Radiography Certificate is shown in Appendix 8.This is the only supplementary certificate that can use be used without being part of a PDO PTW. In this case it would normally be used in conjunction with a contractors own PTW system.
A PDO Class B PTW is required for radiography inside existing production facilities and all pipeline activities; however there may be occasions were radiography is performed in a controlled open area or fabrication yard which will require an internally managed PTW by the Contractor. The intention is that all radiography performed outside engineered enclosures shall have a valid PDO or Contractor Permit to Work in order to facilitate discussion and planning of the work.
The PTW Applicant in conjunction with the radiography Site in Charge (Radiation Protection Supervisor) is responsible for completing the Radiography Certificate (Appendix 8) prior to commencing radiography activities. The Radiography Certificate can be used with a non PDO PTW, however main contractors shall self manage radiography activities and ensure valid documentation as per Section 15.6.8.
Operational, maintenance and emergency procedures for handling, storing and transporting radioactive sources or generators shall meet HSE Specification SP-1237 – Ionising Radiation.
NDT Contractors shall have their own approved Radiation Safety Management System signed off by their Radiation Protection Advisor.
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11 Hazard Management
11.1 Objectives
The objectives of the Hazard Management System are to identify all the hazards involved with a job and then to indicate controls that must be put in place to enable the work to be done safely. Hazard assessment is accomplished using the Job HSE Plan.