Which API code covers Fitness for Service?

Which API code covers Fitness for Service?

• A. API 510
• B. API 580
• C. API 579
• D. ASME Section IX

Answer: (C)

Fitness for Service evaluations determine whether a component with existing damage can continue to operate safely under current conditions. The standard that specifically governs this is API 579. It provides fracture-mechanics–based methods and damage-tolerance procedures to assess flaws such as metal loss, corrosion, and crack-like defects, and to determine acceptable defect sizes, required repairs, or safe operating limits. This makes API 579 the best fit because it focuses on evaluating the impact of damage on structural integrity and residual life, not just inspection or risk decisions. Other options cover different aspects: API 510 deals with inspection and assessment of pressure vessels and piping; API 580 addresses risk-based inspection; and ASME Section IX covers welding and material qualification. Therefore, the standard that directly addresses Fitness for Service is API 579.

Fitness for Service evaluations determine whether a component with existing damage can continue to operate safely under current conditions. The standard that specifically governs this is API 579. It provides fracture-mechanics–based methods and damage-tolerance procedures to assess flaws such as metal loss, corrosion, and crack-like defects, and to determine acceptable defect sizes, required repairs, or safe operating limits. This makes API 579 the best fit because it focuses on evaluating the impact of damage on structural integrity and residual life, not just inspection or risk decisions. Other options cover different aspects: API 510 deals with inspection and assessment of pressure vessels and piping; API 580 addresses risk-based inspection; and ASME Section IX covers welding and material qualification. Therefore, the standard that directly addresses Fitness for Service is API 579.