API 580 RESOURCES
Risk-Based
Inspection
Resources supporting risk-informed
inspection planning & asset prioritization.

Inspection Beyond Compliance

Traditional inspection programs often focus on calendar-based intervals and regulatory requirements.

While compliance remains important, not all equipment presents the same level of risk.

API 580 provides a framework for Risk-Based Inspection (RBI), allowing owner-operators to prioritize inspection activities based on the likelihood and consequences of failure.

API 510 specifically recognizes RBI methodologies as a valid approach for inspection planning and interval determination.

At Advanced Inspection Solutions, RBI helps organizations move beyond routine inspections toward a more focused understanding of asset risk and integrity.

The AIS
Approach

AIS develops inspection strategies that combine:

  • API 580 Risk-Based Inspection Principles
  • API 571 Damage Mechanism Reviews
  • Mechanical Integrity Program Development
  • API 510 Pressure Vessel Programs
  • API 570 Piping Programs
  • API 653 Tank Programs
  • Integrity Operating Window (IOW) Reviews
  • Corrosion Management Strategies
  • Asset Criticality Assessments

The objective is simple:

Direct inspection resources toward equipment presenting the greatest mechanical integrity risk.

Risk Begins With Understanding Failure

Effective RBI programs start by understanding how equipment deteriorates.

AIS utilizes API 571 damage mechanism methodologies to identify credible threats affecting:

  • Pressure vessels
  • Process piping
  • Storage tanks
  • Fixed equipment systems

Understanding damage mechanisms establishes the foundation of every successful RBI assessment.

Probability
of Failure

The probability side of RBI evaluates how likely equipment is to experience degradation leading to loss of containment.

AIS evaluates factors such as:

Equipment Condition

  • Current inspection findings
  • Corrosion rates
  • Historical repairs
  • Remaining life
  • Previous damage

Damage Mechanisms

  • Active degradation processes
  • Corrosion susceptibility
  • Cracking potentia
  • Process-related damage

Inspection Effectiveness

  • Quality of previous inspections
  • NDE coverage
  • Detection capability

Simply stated:

How likely is the equipment to fail?

Consequence
of Failure

Failure likelihood is only part of the equation.

AIS also evaluates the potential impact should a failure occur.

Personnel Risk

  • Worker exposure
  • Public exposure
  • Safety impacts

Environmental Risk

  • Product release potential
  • Regulatory exposure
  • Environmental harm

Business Risk

  • Lost production
  • Facility downtime
  • Equipment replacement costs
  • Operational disruption

Simply stated:

If failure occurs, how significant are the consequences?

Asset Criticality Assessments

Not all assets contribute equally to facility risk.

AIS assists clients with evaluating asset criticality by examining:

  • Process importance
  • Safety implications
  • Reliability impact
  • Environmental sensitivity
  • Maintenance history
  • Production dependency

Criticality assessments help establish inspection priorities across pressure vessels, piping systems, storage tanks, and supporting infrastructure.

Risk-Based Inspection & Fixed Equipment Programs

Risk-Based Inspection is not intended to replace sound engineering judgment.
Instead, RBI enhances existing programs by helping prioritize:

API 510 Programs

  • Pressure vessel inspections
  • Internal inspections
  • On-stream inspections
  • Remaining life evaluationsy

API 570 Programs

  • Piping systems
  • Corrosion circuits
  • Injection points
  • Dead legs
  • Thickness monitoring programs

API 653 Programs

  • Tank bottoms
  • Shell inspections
  • Roof systems
  • Settlement monitoring
  • Corrosion management

RBI provides a framework for deciding where inspections create the greatest value.

Integrity Operating Windows
(IOWs)

Mechanical integrity risk is heavily influenced by operating conditions.

AIS encourages owner-operators to establish and monitor Integrity Operating Windows that track variables affecting equipment degradation.

Examples include:

  • Temperature
  • Pressure
  • Velocity
  • Water content
  • Chlorides
  • H₂S concentration
  • CO₂ concentration
  • Chemical composition

Changes outside established limits may increase risk and require revisions to inspection plans.

Inspection Effectiveness Matters

AIS believes one of the most overlooked components of RBI is inspection effectiveness.

A low-risk asset can become a higher-risk asset if inspection methods fail to identify active degradation. Inspection planning should conside:

  • Damage mechanisms present
  • Appropriate NDE methods
  • Inspection coverage
  • Detection capabilities
  • Data quality

The goal is not simply to perform inspections.

The goal is to obtain meaningful integrity data.

Mechanical Integrity Through Risk Management

RBI supports:

  • Better inspection planning
  • Improved resource allocation
  • Enhanced integrity decision-making
  • Reduced unexpected failures
  • Improved reliability performance
  • Long-term asset stewardship

When properly implemented, RBI helps organizations focus effort where it creates the greatest reduction in risk.

AIS
Philosophy

Many inspection programs focus on inspection intervals.
AIS focuses on:

  • Failure mechanisms
  • Probability of failure
  • Consequence of failure
  • Asset criticality
  • Inspection effectiveness
  • Risk reduction

By combining API 580 risk methodologies with API 571 damage mechanism identification and API 510, API 570, and API 653 inspection practices,.

AIS develops inspection strategies designed to support safer operations, improved reliability, and stronger mechanical integrity programs.

Stewardship Quote

"Risk cannot be managed by inspection frequency alone. Effective stewardship requires understanding failure mechanisms, evaluating consequences, and focusing resources where integrity matters most."

— Kevin B. Hudgens
Founder & Principal Inspector
Advanced Inspection Solutions
API INSPECTION RESOURCES

API 580 Resources

Technical resources supporting risk-based inspection, probability of failure analysis, consequence evaluation, inspection planning, and mechanical integrity decision-making.