Corrosion loop(s) are systematized analysis "loops" used during Risk-based inspection analysis.Both terms “RBI Corrosion loops” or “RBI corrosion circuits” are generic terms used to indicate the systematization of piping systems into usable and understandable parts associated with corrosion. Systematized piping loops or circuits are systems used in Risk Based Inspection analysis to assess the likelihood and consequence of failure. Other systematization may also prove useful, such as, i.e. inspection, consequence, materials of construction and chemistry. The system (or sub systems)maybe used to identify, pressure / temperature, subsequent failure mechanism and possible failure rate.They may be based upon Construction drawings, Process Flow diagrams or Piping & Instrument diagrams as require