Print-Version Published for PetroEnergy Magazine April - May 2008 Edition
--
Asset integrity nowadays is considered as one important element to improve productivity in oil and gas production facilities (production, refining, and distribution). In the development, asset integrity arise from technical issue (maintenance, inspection, engineering assessment) to a higher level of corporate management policy. Asset integrity can be defined as the ability of the asset to perform its required function effectively whilst safeguarding life and the environment. Asset Integrity Management System (AIMS) is the means of ensuring that people, systems, processes and resources, which deliver integrity, are in place, in use and fit for the purpose over the whole lifecycle of the asset.
As a management process, AIMS process shall include policy development, organizing, planning and implementation, measuring performance, and audit and review, Figure 1. Guideline to develop AIMS for offshore production facilities was developed by a joint industry project between UK Offshore Operators Association (UKOOA), Step Change in Safety, The Health and Safety Executive UK in 2006 publishing Asset Integrity Toolkit.
AIMS elements shall be in accordance to company Quality or HSE Policy. HSE based AIMS has already been implemented by several oil and gas operators in United States and Europe. Asset Integrity Toolkit is also a health and safety based AIMS which is more comprehensive and measurable by several performance indicators that already known well in oil and gas industry. Asset Integrity Toolkit can be proposed as the basis for asset integrity audit for pre-development of asset integrity management system. Asset Integrity Toolkit defines 32 elements of AIMS into 6 six groups as follows:
1.1. Assurance and Verification;
Operators shall define safety critical element (SCE) within the facility. SCE is a term in Safety Case (UK Offshore Installation Safety Regulations SI 2005 No 3117) to refer to:
- Parts of an installation and such of its plant or any part thereof , the failure of which could cause or contribute substantially to a major accident; or
- A purpose of which is to prevent or limit the effect of a major accident.
The assurance process is the duty holders responsibility to set out an assurance scheme that defines and manages the activities which ensure required performance standards of SCE are sustainable. While the verification process is the duty holders responsibility to develop verification scheme that provides the evidence to demonstrate the assurance scheme is operating effectively. Independent reports and comments shall be able to define clearly SCE list, assurance activities applied to SCE, and any failures and or anomalies are in communication with the duty holders
1.2. Assessment/Control and Monitoring;
The process of assessment/control and monitoring should include the following key elements:
- Rigorous risk assessment of potential major hazards and threats from plant equipment and operations to the personnel, the environment, and the asset;
- Identification necessary mitigation and controls in order to lower each of the risks to a level which is As Low As Reasonably Practical (ALARP);
- Recognition of which of these controls takes the form of SCE and assurance that the associated performance standards are continually maintained. Main issue in this element is engineering integrity. The duty holders should develop strategy to maintain the integrity of plant equipment against mechanical failure, fatigue, corrosion, throughout asset lifecycle. Activities ruled under this AIMS element are:
- Asset register (asset information system);
- Risk Assessment (risk based inspection);
- Mitigation Plan (repair, replace,re-engineering);
- Inspection and monitoring (NDT, vibration analysis); and
- Integrity assessment (fitness for service, defect assessment)
1.3. Competence
Personnel with the required levels of competence should be supported by commitment of senior management. Duty holders should develop competence system that should: be able to verifiable by audit of training, recruitment process, formal assessment, provides demonstrable capability within their pre-defined and agreed job description, be in accordance with national or equivalent standards, cover third party contractors.
1.4. Planning
AIMS should be comprehensively planned for successful implementation. The planning and implementation of an Integrity Management System should includes:
- Processes definition required to manage the integrity of asset;
- Resources and Responsibility Allocation;
- Identification performance against the plan;
- Identification SCE should be included;
- Identification business element should be included; and
- Effective prioritization of activities
1.5. Maintenance Management System
Maintenance Management System (MMS) provides the process for managed and control of maintenance program including set of maintenance task and their schedules. Target object of MMS include the following:
- Maintaining the condition, functionality, operability of equipments;
- Reducing failure incidence or mean time between failures, downtime after failures or mean time to repair;
- Reducing critical incidents or near miss accidents;
1.6. Quality and Audit
Quality management and audit should be integrated and aligned in every process embedded in every aspects of asset integrity management through out six lifecycle stages. Quality and audit system as to senior management framework to guide organization toward performance improvement can encompass the four C’s of control (defined roles and responsibilities), communication (clear reporting and record keeping), competence (training and supervision), and co-operation (interface management).
II. Measuring AIMS Performance
AIMS achievement can be measured by using industry key performance indicator (KPI). Setting KPIs to measure AIMS performance, to refer to RIDDOR (The Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 1995), and OGP (The International Association of Oil & Gas Producers), are as follow:
- Dangerous occurrence;
- Very High Potential Incident;
- Loss Time Injury;
- Major Injury;
- Hydrocarbon Release;
- Failure of SCE;
- Safety Critical Maintenance Backlog; and
- Overdue Inspection
Reference
1. United Kingdom Offshore Operator Association (www.ukooa.co.uk)
2. International Association of Oil and Gas Producers (www.ogp.org.uk)
3. The Health and Safety Executive UK (www.hse.gov.uk)
No comments:
Post a Comment