1
Risk Based Inspection
March 2004 2
RBI Agenda
• RBI definition• Approaches to RBI• API RP 580 and Publication 581• API equipment scope• Risk• Risk matrix • Management of risk using RBI• RBI planning process• Database – CREDO• Current status RBI• OPQL program
March 2004 3
RBI Definition
• Risk Based Inspection (RBI) is a method for using risk as a basis for prioritizing and managing the efforts of an Inspection program
March 2004 4
Approaches to RBI
There are many different forms of RBI programs
• API RP 580, Risk Based Inspection –Integrated with other practices API Code 510, Pressure Vessels; API Code 570, Piping etc…
• API Publication 581,
March 2004 5
API RP 580 and Publ. 581
API RP 580• Outlines conceptual approaches
and necessary elements included in a quality RBI system
• Includes several approaches to RBI
API Publication 581• Outlines specific RBI
methodology• Is a step-by-step approach that
contains necessary elements to satisfy RP 580
March 2004 6
API Equipment Scope
Equipment covered• Pressure vessels• Process piping• Heat exchangers• Storage tanks• Heaters and boilers
March 2004 7
Risk
Risk is a product of the likelihood of failure (LOF) and the consequence of failure (COF).
RISK = PROBABILITY x CONSEQUENCE
March 2004 8
Management of Risk using RBI
Level of Inspection Activity
Leve
l of R
isk
Risk Using RBI Residual Risk Not Affected by RBI
Risk with Typical Inspection Program
March 2004 9
Risk Matrix
1 2 3 4 5
E
A
D
C
B
Pro
babi
lity
Cat
egor
y
Consequence Category
High Risk
Medium Risk
Low Risk
Qualitative Risk Matrix
March 2004 10
RBI Planning Process
CREDO Expert Group
CREDO Inspection Engineer
Corrosion Engineer
Data andInformationCollection
ConsequenceOf Failure
ProbabilityOf Failure
RiskRanking
InspectionPlan Mitigation
Reassessment
Risk Assessment
March 2004 11
Database - CREDO
March 2004 12
Expert Group
Problem• No single person has all the skills and experience necessary to carry
out the assessment
Solution• Use a multi-discipline team or ‘expert group’ with collective
responsibility for carrying out the risk assessment
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Expert Group Members
• Team leader• Inspection specialist• Materials and Corrosion specialist• Process specialist• Operations representative• Maintenance representative• Safety and Environmental representative
March 2004 14
Database - CREDO
March 2004 15
Current Status RBI
• OPQL applied API 510 and internal standard for Vessels• Vessels and Pipework, ICB (BV) RBI analysis
- risk ranking and inspection frequencies identified
• Subsea - independent assessment based on QP standard and five year plan identified - 2003 100% local surveys carried out around complex
• Trained personnel
March 2004 16
OPQL Program
STRATEGY - DEVELOP OPQL METHODOLOGY AND RBI SYSTEM 01-Feb-04 18-Apr-04
RBI SYSTEM TRAINING - EXTERNAL 01-Jan-04 15-Feb-04
RBI SYSTEM TRAINING - INTERNAL 01-Apr-04 30-Apr-04
DATA GATHERING - POPULATE CREDO 01-Dec-03 31-Jul-04
EXPERT GROUP ASSESSMENT - MULTI DISCIPLINE TEAM APPROACH 18-Apr-04 31-Jul-04
DOCUMENT PROCESS - RBI SOFTWARE IN CREDO 18-Apr-04 31-Jul-04
VALIDATION OF RBI METHODOLOGY AND ANALYSYS 01-May-04 31-May-04
PLANS AND PRIORITIES 01-Mar-04 31-Jul-04
REASSESSMENT OF RBI 01-Aug-04 31-Aug-04
OPQL RBI PROGRAM
May-04 Jun-04 Jul-04Jan-04 Feb-04 Mar-04 Apr-04ACTIVITY Start Finish Dec-03 Aug-04
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