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Section A General
Introduction
The petroleum industry handles large quantities of flammable and toxic materials, so the potential for serious accidents is elear. To prevent them it is vital that safe systems of work should be in place.
When incidents do occur, human factors, such as failure to implement procedures properly, are often a root cause. These failures may in turn be attributable to a lack of training, instruction or understanding of either the purpose or practical application of a Permit to Work (P.T.W) systems.
A P.T.W is not simply permission to carry out a dangerous job. It is an essential part of a system which determines how that job can be carried out safely. The permit should not be regarded as a statement that all hazards and risks have been eliminated from the work area. The issue of a permit does not, by itself, make a job safe. That can be achieved only by those preparing for the work and those carrying it out. In addition to the P.T.W system other precautions such as curtailing production, suspending helicopter operations, etc may need to be taken. The P.T.W system should ensure that authorised and properly trained people have thought about foreseeable risks and that these are avoided by using suitable precautions. Those carrying out the job should think about and understand what they are doing and how their work may interface with that of others. They must also take the necessary precautions which they have been trained to take and for which they have been madę responsible.
This guide is intended to give everyone involved in the E & P industry a basie understanding of what is meant by a “P.T.W” system.
The advice offered is of a generał naturę and is not intended to be exhaustive. It is essential that it is read in conjunction with the specific instructions and guidance produced by individual companies for their own particular operations or activities.
What is a Permit to Work system?
A P.T.W system is a formal written system used to control certain types of work which are identified as potentially hazardous. It is also a means of communication between site/installation management, plant supervisors and operators and those who carry out the work. Essential features of P.T.W system are:
• elear identification of who may authorise particular jobs (and any limits to their authority) and who is responsible for specifying the necessary precautions
• training and instruction in the issue and use of permits
• monitoring and auditing to ensure that the system works as intended.
The terms “P.T.W”, “permit” or “work permit” refer to the certificate or form which is used as part of an overall system of work and which has been devised by a company to meet its specific needs.
A P.T.W system aims to ensure that proper planning and consideration is given to the risks of a particular job. The permit is a written document which authorises certain people to carry out specific work, at a certain time and place, and which sets out the main precautions needed to complete the job safely.
The objectives and functions of such a system can be summarised:
• ensuring the proper authorisation of designated work. This may be work of certain types, or work of any type within certain designated areas, other than normal operations
• making elear to people carrying out the work the exact identity, naturę and extent of the job and the hazards involved, and any limitations on the extent of the work and the time during which the job may be carried out
• specifying the precautions to be taken including safe isolation from potential risks such as hazardous substances and energy sources
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