GL - Noble Denton
Risk Based Inspection (RBI)

Risk Based Inspection (RBI)

Adapting to client's needs

Customer knows better about their requirements and they have evolved on their methodology for risk based inspection over years. Though GL Noble Denton has expertise in setting the whole risk based inspection process and guideline for customer, GL Noble Denton adapts to what is required by the customer. For doing this GL Noble Denton designed GALIOM's Risk Based Inspection Modules.

GALIOM's Risk Based Inspection Modules is a configurable solution where any existing model of the customer can be configured to do the RBI or consider modifying the GL Noble Denton's proposed models. GALIOM comes with its own RBI approach based on the experience in various customers and also contains API 580/581 RBI Qualitative and semi quantitative model inside GALIOM.

The semi quantitative risk assessment provides a great level of analytical detail on the damage mechanisms that may be noted and defines the consequence of failure in terms of affected areas combined with an assessment of the generic failure frequency that may be observed. Like the qualitative assessment the semi quantitative Overall Risk Rating Summary (Risk Category) is derived by the system from the combination of the Overall Probability of Failure (POF Category) and the Overall Consequence of Failure (COF Category).

Consequence of Failure
The Consequence of an Equipment Failure shall be assessed in four Categories:

  • Consequence to People - Safety
  • Consequence to Environment
  • Consequence to Asset - Damage Cost/Production Loss
  • Consequence to Reputation
  • Assessment of Consequence of Failure will require the assistance from Customer's Operations, Maintenance and other personnel

Probability of Failure
Equipment Historical Inspection data and, where available, Repair History will be entered into the application. Evaluation of the data will be carried out by the Reliability Engineer and RBI Specialist. The application will, based on available data, determine the Component Corrosion Rate and Remaining Life for insertion into the Probability of Failure screen. The Failure Mechanisms associated with the equipment will be reviewed and displayed on the POF screen. Probability of Failure is by the factor of failure mechanism, factor by current inspection effectiveness, remaining life and other parameters depending on the type of equipments used.

Risk Ranking
Based on the Consequence and Probability of Failure the resultant Risk shall be identified and displayed on a 5x5 Risk Matrix. At the same time the Asset Hierarchy will also be color coded to display the level of Risk for each piece of equipment.


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