Analysis of Failed and Non-Failed Tube Samples

Intertek evaluates and analyzes Boiler Tube samples for Failure Analysis, Present Condition, and Remaining Useful Life.

Engineers and technicians evaluate failed boiler tubes to determine the failure mode and root cause of failure, and provide recommendations to prevent recurrence. Non-failed water-cooled tube samples are assessed for present condition and suitability-of-continued-service. Non-failed steam-cooled samples undergo a Remaining Useful Life (RUL®) analysis.

The tube evaluation laboratory applies standard metallographic methods along with techniques developed by Intertek to produce a cost-effective program that ensures accurate and high quality results.

Tube Analysis and Evaluation includes:  

• Metallurgical Evaluation Plan with Input from Client
• Visual, Nondestructive Examinations, and As-received Photo-documentation
• Dimensional Measurements on Ring Samples
• Material Verification
• Evaluate Metallographic Specimens
• Hardness Testing
• Characterize Internal Scale and Deposits
  • Steam-cooled Tubes — Determine steamside scale thickness and morphology
  • Water-cooled Tubes — Determine the chemistry and deposit weight
• Analysis of Data and Report
• Conclusions: 
  • Cause of tube failure
  • Remaining creep life
  • Current tube condition
• Recommendations:
• Operational changes
• Water chemistry changes
• Chemical cleaning
• Tube replacement
• Design changes
• Additional analyses 

Contact Intertek for more information.