API 571 Damage Mechanisms

Use Damage software as a quick damage mechanism reference guide to proactively assess risk, refine inspection strategies, and prevent costly failures.

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Take the Guesswork Out of Damage Mechanism Identification

Understanding and predicting damage mechanisms in process units is complex, especially with a multitude of variables to consider and changing operating conditions.

Equity Software developed Damage, a cloud-based webtool, to streamline the process of pinpointing damage mechanisms and identifying potential risk areas. With a technical basis in API RP 571 and WRC 489, Damage software is designed to help you quickly classify and understand the potential damage mechanisms.

Easily Predict Future Outcomes with Damage Software

  • Reduce Equipment Failures – Identify and address potential damage mechanisms before they become costly problems.
  • Improve Inspection Strategies – Select the right inspection methods based on real-time analysis and API 571 standards.
  • Enhance Operational Safety – Ensure reliability across refineries, petrochemical plants, and other process industries.
  • Streamline Compliance – Access and apply API RP 571 and WRC 489 guidelines in a structured, easy-to-use format.

Comprehensive Damage Mechanism Database

Use the Damage software to identify the more than 67 damage mechanisms in API RP 571, 3rd edition, including:

  • Brittle fracture is the sudden unstable crack propagation that shows little-to-no ductility or plastic deformation.
  • Sulfidation occurs when sulfur is exposed to high temperatures (1290°F />700°C) and reacts with the chemical compounds in metals or alloys.
  • Corrosion under insulation (CUI) develops when there is trapped water or moisture on surfaces covered with insulation.
  • High-temperature hydrogen attack (HTHA) causes the degradation of carbon and low-alloy steels exposed to hydrogen gas and is often difficult to detect.
  • Wet hydrogen sulfide (wet H₂S) affects the load-carrying capacity of pressure retaining equipment and leads to hydrogen blistering, hydrogen-induced cracking (HIC), stress-oriented HIC, and sulfide stress cracking.

Visualize & Organize Damage Mechanisms

Process Flow Diagrams (PFDs)

See where damage is likely to occur and cross-reference with API RP 571 for additional insight.

  • Read the code! All active damage mechanisms are hyperlinked to API RP 571
  • Visualize and understand damage mechanisms with color-coded corrosion loops
  • Access corrosion loops aligned with API RP 571 standard PFDs

Custom Damage Mechanism

Drawings improve communication and understanding throughout your organization with customized PFDs by process unit or process.

  • Import your plant-specific PFDs for customized analysis
  • Organize drawings in folders by unit
  • Clearly identify different damage mechanisms using the legend and labels
  • Provide inspection, operations, and reliability teams with consistent damage data
  • Access corrosion rate and cracking susceptibility

Analyze & Solve Using Interactive Tools

Damage Mechanism Solver

Quickly identify and view critical factors affecting the applicable damage mechanisms in your process unit with the built-in solver.

  • Investigate active or potential damage mechanisms
  • Sort and filter mechanisms by process unit, material of construction, operating temperature, and more

Advanced Calculation Tools

Accurately analyze corrosion rates for multiple materials using Damage’s real-time display, interactive sliding controls, and enhanced graphics. Calculate susceptibility for high-risk mechanisms, including:

  • HTHA
  • Sulfidation
  • H2/H2S corrosion
  • API 581 compatible stress corrosion cracking calculators (amine, sulfide stress, caustic cracking)

Our Software Experts

The groundwork for Equity Software began more than 30 years ago with the initial development of SagePlus™. Over the years, Equity Software has continued to introduce industry-leading innovations, including SagePlus, API RBI, the Equity Engineering Cloud (eec), and damage mechanism software.

We’ve integrated these advancements into the PlantManager 6.0 platform, embracing the future of cloud-native solutions. Our ongoing commitment to innovation and collaboration continues to drive our mission in advancing industrial asset management and technology.

  • Pioneered development of RBI and FFS software
  • Integrated API and ASME codes and standards into all software
  • Used by Equity’s consulting engineers for FFS, RBI, damage mechanism reviews, and other asset lifecycle management projects