Services and tools.
The initial step of a RAM analysis typically includes workshops with customer participation to identify system boundaries, critical components and failure modes.
To calculate component reliability TGS takes advantage of TGS own database and industry specific reliability databases combined with vendor or costumer reliability data.
For the purpose of performing production availability calculations of Oil & Gas facilities, TGS uses AMprover® 3.0 next generation. The tool is based on SQL Visual Basic model approach where the system being analyzed is represented in terms of multilevel dependencies between systems and sub-systems and system redundancies. The tool offers a variety of features, which have proven to add value in the design and operation of Oil & Gas facilities:
✓ Calculation and visualization of availability results at multiple levels of system decomposition (overall system, subsystems, and system components)
✓ Calculation of the availability of partial system production modes
✓ Excellent possibilities for pinpointing subsystems contributing significantly to the overall system unavailability
✓ Outstanding visualization possibilities of system dependencies and traceability of availability results
Based on the results of the RAM analysis, we recommend design modifications which are tailored to the needs of our customer.
Deliverables The output requirements are as follows:
✓ Reliability R and Availability A for each unit with a mission time of 1 year
✓ Top 10/20/30 Unreliability items
✓ Top 10/20/30 Unavailability Items
✓ Top 10/20/30 Highest Risk items
✓ Risk vs Unreliability plot
✓ Risk vs Unavailability plot
✓ Weak Link Analysis pointing to the weakest element in the RBD and options (including spare strategy) to enhance Reliability and Availability (R and A before and after enhancement)
✓ Maintenance strategy for each component (i.e. Run To Failure, Preventive Maintenance, Predictive Maintenance)
✓ The analysis must include the following:
• RBD based on the latest PFD/P&ID/Single line etc.
• All pressure vessels
• Key instruments and control systems (any that can trip/shutdown a unit)
• All electrical motors
• All substations, incoming and distribution power lines etc.
• All other drivers (i.e. turbines)
• All rotating equipment (including Pumps, Compressors, Gears, Fans)
• All piping circuits
• RBI data
• Maintenance equipment repair/service history
• Ability to run Weibull and Exponential distributions. All electrical system as
Ex ponential and all others as Weibull
• Annul maintenance budget and the risk associated with under budgeting
• The current state of the two units as far as percent reactive vs planned
maintenance and against industry benchmarking