header photo

What is RBI?

Risk Based Inspection (RBI) is an inspection program based on the risk-based methodology for pressurized fixed equipment, including pressure vessel, piping, tankage, pressure relief devices, and heat exchanger tube bundles in the refining, petrochemical and chemical process plants. The Risk-Based Inspection methodology may be used to manage the overall risk of a plant by focusing inspection efforts on the process equipment with the highest risk. RBI provides the basis for making informed decisions on inspection frequency, the extent of inspection, and the most suitable type of NDE (Non destructive evaluation). In most processing plants, a large percent of the total unit risk will be concentrated in a relatively small percent of the equipment items. These potential high-risk components may require greater attention, perhaps through a revised inspection plan. The cost of the increased inspection effort may sometimes be offset by reducing excessive inspection efforts in the areas identified as having lower risk.

The essential element in all these situations is a Risk Analysis: the combination of an assessment of the likelihood of failure due to damage, deterioration or  degradation, and the consequences of any such failure. The information gained from this process is used to identify the type and rate of damage that could potentially occur and the equipment or locations where failure would give rise to danger of different degrees.

Risk-based inspection can be done in a qualitative, semi-quantitative or  quantitative manner, using guidance from standards applicable to different situations such as API 581 for oil and gas and petro-chemical scenarios, and DNV-RP F116 for subsea pipeline. Other assets for which RBIs are valuable are storage tanks, onshore pipelines and structures, and power generation components such as steam turbines, gas turbines, heat recovery steam  generators and balance-of- plant systems.

RBI is used to identify and understand risk drivers to prioritize inspection-related activities, usually by means of Non-destructive examination (NDE) to reduce the uncertainties around the true damage state of the equipment and the dynamics leading to such. The resulting inspection plan outlines the type and scheduling of inspection for an asset. In addition to NDE, additional risk mitigation activities identified by a RBI assessment might include a change in material of construction, installation of corrosion resistant liners, operating condition changes, injection of corrosion inhibition chemicals, etc.

Unplanned shutdowns of oil or chemical plants can be minimized or avoided using Risk-Based Inspection (RBI) expertise. Risk-Based Inspections (RBI) is an approach that minimizes downtime and ensures equipment longevity for oil and chemical plants. Analysis of fixed equipment, piping, pipelines, and pressure relief devices at your facility using an RBI approach can increase the effectiveness of your Mechanical Integrity Inspection Program while minimizing risk to Health, Safety and the Environment (HS&E) and maximizing resource utilization.

Key Benefits of Risk-Based Inspections (RBI)

  • Risk-based inspection is a means of using inspection resources more cost-effectively, optimizes inspection time with confidence
  • Identification of the operational risks associated with equipment via material degradation. Manage risk by identifying the probability and consequences of failure or malfunction at an early stage, minimizing costly rework. The entire process results in focusing resources on specific assets that are most likely to pose a risk to the facility.
  • Maximize plant life and availability by avoiding unscheduled downtime due to unidentified risks and by reducing intrusive inspections, more reliable equipment and plant operation.
  • Risk-based inspection principles offer an established methodology for efficient plant maintenance, Optimize inspection, repair and maintenance time and cost
  • Reduce operating costs– with an approach that differentiates high-risk systems and critical components, thus ensuring cost-efficient allocation of resources during operation and maintenance.
  • Extend your plant’s lifetime– with risk-oriented lifetime management of systems and components, using Fitness for Service techniques.
  • Adherence to codes of compliance resulting in increased safety

Companies Participated in Past Events