RBI, Risk Based Inspection

The key outcome of any RBI scheme is a prioritised and focused inspection schedule
This ensures high risk items get correct scrutiny and produces a safety focused and cost effective inspection scheme.

RBI is now recognised as a key tool in meeting legislative requirements, as detailed in the HSE's best practice guidelines,

Risk Based Inspection
Using RBI Programme, Risk is reduced to a greater degree than at the same cost using a Typical Inspection Programme

Risk Based Inspection
Using a RBI Scheme a piece of equipment is given a Risk rating based on failure Probability versus Consequence.

RBI Scheme helps avoid over-inspection of low risk equipment and puts focus on equipment that has High Probability and High Risk of failure

RBI Scheme

  1. Assessment of the credible threats to a piece of equipment.
  2. Potential failure modes and mitigation measures
  3. Resulting consequences
  4. Associating a measure of risk with each item
  5. Combine risk with inspection history to determine future inspection intervals and methodologies
  6. Carry out inspection to requirements

Implementation process - Vessels

  1. Extract historical wall thickness data
  2. Review data - estimate corrosion rates and minimum wall thickness
  3. Rank vessels according to susceptibility/remnant life
  4. Define inspection requirements
  5. Define repair/replacement requirements
  6. Carry out inspection to requirements