Life extension by re-engineering

Industrial steam turbine


  • 8 x 5MW HP-IP turbines at a UK refinery, with 180,000 hours service


  • Rotor life assessment, prior to re-blading for 140,000 hours further operation


  • Sampling the cold ends of the three oldest rotors for chemical analysis and post-exposure creep testing to 5000h
  • Stress analysis and creep life assessment


  • Identified materials that were inferior to design specification
  • Established the actual as-built creep properties
  • Successful underwriting of 140,000h further operation

Plant Integrity