RBI Risk Based Inspection | API TRAINING IN TRICHY

RBI RISK BASED INSPECTION

Chapter I

What is RBI Risk Based Inspection?

• Strategic, systematic process for identifying risk and managing risk and its associated costs
• Integrated, data-based methodology that factors risk into inspection decision making
• Includes likelihood of failure (LOF) and consequence of failure (COF)
• Includes both qualitative and quantitative analysis
• Prioritizes relative and/or absolute risk
• Identifies areas requiring risk mitigation

Approaches to RBI  Risk Based Inspection

• There are many different types of RBI analysis

Proposed API Recommended Practice 580

• Status – Currently in final balloting stage
• Focus of this Course

ASME Inspection Planning Standard

• Major focus is on nuclear and fossil power generation

Integration of API Practices

• API RP 580, Risk Based Inspection is integrated with other practices
•  API Code 510, Pressure Vessels
• API Code 570, Piping
• API Standard 653, Storage Tanks
• API RP 579 Fitness-for-Service
• API RP 750 Management of Process Hazards
• API RP 571–577, Inspection of Equipment Types
• API RP 578, Positive Materials Identification
• Proprietary commercial methods
• Owner-User methods

Purpose of RBI Risk Based Inspection

• Risk Based Inspection is a methodology of basic elements which is expected to provide a linkage of risks with appropriate inspection or other risk mitigations activities to manage the risks.

Scope of RBI Risk Based Inspection

• The risk management principles and concepts that RBI is built on are universally applicable
• RBI, as will be discussed, is targeted for the hydrocarbon industry

1. Petroleum
2. Gas
3. Chemicals
4. Petrochemicals                                                                                                                                                                                                                                RBI principles will work in any industry exposed to risk

• Other Aspects of Scope

1. Flexibility in Application
2. Mechanical Integrity Focus
3. Equipment Covered & Not Covered

Flexibility in Application of RBI Risk Based Inspection

• Flexibility addresses:

1. Diversity of Organizational Size and Culture
2. Regulatory Requirements
3. Corporate Risk Management Practices
4. Unique Local Circumstances

• Other Aspects

1. Attributes of a Quality Risk Assessment Program
2. Imposition of Undue Constraints on Users
3. Provides Consistency

Mechanical Integrity Focus of RBI Risk Based Inspection

• RBI process is focused on maintaining the mechanical integrity of pressure equipment and minimize risk of loss of containment
• RBI Complements

1. Fitness-for-Service of RBI Risk Based Inspection

• Management of acceptable risk and mitigation of risk

1. Process Hazard Analysis

• Inspection relates to deterioration mechanisms

1. Reliability Centered Maintenance

• Both focus on understanding failure modes

Scope of Equipment in RBI Risk Based Inspection

• Covered Equipment

1. Pressure Vessels
2. Process Piping
3. Heat Exchangers
4. Heaters and Boilers
5. Storage Tanks
6. Rotating Equipment

• Pressure boundary

1. Pressure Relief Devices

• Excluded Equipment

1. Instrumentation
2. Control Systems
3. Electrical Systems
4. Structural Systems
5. Machinery Components

Implementation by API

• API Code 510, Pressure Vessels
• API Code 570, Piping
• API Standard 653, Storage Tanks
• API RP 579 Fitness-for-Service
• API RP 750 Management of Process Hazards
• API RP 571–577, Inspection of Equipment Types
• API RP 578, Positive Materials Identification
• API Publ. 581, API RBI Methodology/Software

API RP 580 RBI Risk Based Inspection and Publ. 581 Differences

• API RP 580 RBI Risk Based Inspection

1. Outlines conceptual approaches and necessary elements to be included in a quality RBI effort
2. Inclusive of several approaches to RBI available for numerous sources

• API Publication 581

1. Outlines the specific RBI methodology developed by the API RBI sponsor group
2. It is one step-by-step approach to RBI that contains all the necessary elements to satisfy RP 580

Comparison of API and ASME Risk Based Inspection Practices

• No philosophical differences
• Differences in documents

1. Differences in scope and goals

• ASME project aims at developing guidelines for inspection
• API project intended to develop usable tools and methodologies for the plant level
• API project builds on ASME methods but with appropriate simplification

Process Hazard Analysis (PHA) Linkage

• PHA + RBI =Total Process and Mechanical Integrity Hazards Analysis Associated with Operating Plants

Reliability Centered Maintenance (RCM) Linkage

• RCM + RBI =Total Reliability and Pressure Integrity Analysis for Functional Breakdown and Leak/Rupture