Pipeline Pitting due to MIC
Boiler Tube Rupture
Internal Corrosion of Regen Cooler Header
Creep Rupture of a Studded Tube Pipeline Rupture
Failure Analysis Determining why and how components fail DNV provides metallurgical and root cause failure analyses to a wide variety of industries. Experience and Knowledge DNV provides the expertise and experience you need when components fail. Our expert staff consists of metallurgical engineers, material scientists, and other engineering disciplines. We utilize cutting edge laboratory and modeling tools for determining the mechanism/mode and root cause of failures. Some of the facilities, equipment, and methods we provide include: • • • • • • • • • •
State-of-the-art metallographic laboratory Optical microscopy Scanning Electron Microscopy (SEM) Energy Dispersive Spectroscopy (EDS) X-Ray Diffraction (XRD) Fourier Transform Infrared (FTIR) spectroscopy Differential Scanning Calorimetry (DSC) Tensile testing Charpy V-notch testing Burst pressure calculations (CorLAS™, RSTRENG™)
Our extensive experience includes numerous high-profile failure analyses involving state and federal officials. DNV Columbus 5777 Frantz Road Dublin, OH 43017 USA 614.761.1214 dnvcolumbus@dnv.com www.dnvcolumbus.com
DNV Houston 1400 Ravello Katy, TX 77449 USA &KULV 3ROODUG@dnv.com
Timely Results When failures happen, it is important to obtain results in a timely manner to help get your operations back on track. The results of a failure analysis can often prevent repeat failures, increase safety, optimize day-to-day operations, and provide needed information for materials selection. In the event of a failure, DNV can provide on-site supervision and provide results verbally or via report within one month of commencement of a project. Our reports are of the highest quality in both description and documentation. Factors of Materials Failures Typical failure mechanisms/modes and contributing factors encountered include: • Fatigue / Corrosion fatigue • Creep • Mechanical damage • Environmentally Assisted Cracking (SCC, HIC, and, SSC) • Oxygen concentration cell corrosion • Microbial Influenced Corrosion (MIC) • Erosion corrosion • Weld defects
DNV Calgary 2340 Pegasus Way, NE, Suite 123 Calgary, AB T2E8M5 Canada 403.250.9041 dnvcalgary@dnv.com www.dnvcalgary.com
Failure Analysis Determining why and how components fail
• Creep voids and void coalescence in a Fe-Ni-Cr alloy
• Stress corrosion cracking of carbon steel
• Fatigue striations on the fracture surface of a carbon steel
• Crevice corrosion and SCC of an austenitic stainless steel
INDUSTRIES SERVED
• Pipelines • Oil and Gas Production Facilities • Refineries • Chemical Processing Industry • Reformer Furnaces • Utilities • Aerospace • Automotive
DNV Columbus 5777 Frantz Road Dublin, OH 43017 USA 614.761.1214 dnvcolumbus@dnv.com www.dnvcolumbus.com
DNV Houston 1400 Ravello Katy, TX 77449 USA Chris.Pollard@dnv.com
MATERIALS EVALUATED • Carbon Steel • Stainless Steel • Corrosion Resistant Alloys • Copper • Composites • Polymers • Coatings • Electrical Components
DNV Calgary 2340 Pegasus Way, NE, Suite 123 Calgary, AB T2E8M5 Canada 403.250.9041 dnvcalgary@dnv.com www.dnvcalgary.com