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Solutions

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Fitness-for-Service

API 579 Fire Damage Assessment

ATS uses API 579 Part 11 to evaluate fire-damaged equipment integrity and support informed remediation decisions.

The Applied Technical Services Family of Companies (ATS FoC) delivers API 579 fire damage assessments to determine whether critical assets, such as pressure vessels and piping systems, are safe for continued operation following a fire event or overheating incident.

Our API inspectors, engineers, and mechanical integrity specialists apply API 579 Part 11 at various levels to evaluate the remaining structural integrity of fire-damaged assets and recommend corrective actions, helping you resume normal operations with as little downtime as possible.

​How Does API 579 Determine if Fire-Damaged Equipment is Safe for Service?

API 579 fire damage assessments require multidisciplinary expertise and accurate data to support informed return-to-service decisions. The process involves mapping heat-exposure zones, identifying material degradation, deformation, and metallurgical condition, then applying Fitness-for-Service (FFS) criteria to verify remaining asset strength. We support these assessments with NDT, metallurgical testing, forensic analysis, and FFS engineering to determine whether fire-damaged equipment is safe to continue operations or requires replacement or repair.

What is the Difference Beeen API 579 Assessment Levels?

API 579 Part 11 uses a three-tiered approach to determine the level of inspection required.

  • Level 3: Advanced analysis for complex damage, including finite element analysis (FEA), detailed metallurgical testing, and fracture mechanics assessments for critical decisions.
  • Level 1: Conservative screening using simple calculations for rapid assessment.
  • Level 2: Detailed engineering evaluation for more accurate results and requires a Fitness-for-Service engineer.

Quality Backed by Technical Expertise

Our trained, certified, and licensed professionals deliver the technical evidence to support repair, rerating, replacement, and restart strategies after fire damage. Across our expanding network of laboratories, API 579 Part 11 serves as the framework for our comprehensive approach. Our commitment to quality is backed by our A2LA ISO/IEC 17025:2017-accredited and ISO 9001:2015-certified quality management system.

Since 1967, ATS has supported TICC industry clients in making informed decisions about their critical assets. After joining SGS in 2026, we expanded our services to enhance safety and reliability worldwide.

Contact Us

​If your organization requires an API 579 fire damage assessment, submit a web request form or call ATS today at +1 (888)-287-5227 to get started.

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