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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 Houston 1400 Ravello Katy, TX 77449 USA @dnv.com Creep Rupture of a Studded Tube Pipeline Rupture
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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.
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 provides metallurgical and root cause failure analyses to a wide variety of industries.
Determining why and how components fail
Failure Analysis Pipeline Rupture
Boiler Tube Rupture Internal Corrosion of Regen Cooler Header Pipeline Pitting due to MIC
Creep Rupture of a Studded Tube
DNV Columbus 5777 Frantz Road Dublin, OH 43017 USA 614.761.1214 [email protected] www.dnvcolumbus.com
DNV Houston 1400 Ravello Katy, TX 77449 USA 832.541.1084 [email protected]
DNV Calgary 2340 Pegasus Way, NE, Suite 123 Calgary, AB T2E8M5 Canada 403.250.9041 [email protected] www.dnvcalgary.com
Determining why and how components fail
Failure Analysis
MATERIALS EVALUATED • Carbon Steel • Stainless Steel • Corrosion Resistant Alloys • Copper • Composites • Polymers • Coatings • Electrical Components
INDUSTRIES SERVED • Pipelines • Oil and Gas Production Facilities • Refineries • Chemical Processing Industry • Reformer Furnaces • Utilities • Aerospace • Automotive
• Creep voids and void coalescence in a Fe-Ni-Cr alloy
• Fatigue striations on the fracture surface of a carbon steel • Crevice corrosion and SCC of an austenitic stainless steel
• Stress corrosion cracking of carbon steel
DNV Columbus 5777 Frantz Road Dublin, OH 43017 USA 614.761.1214 [email protected] www.dnvcolumbus.com
DNV Houston 1400 Ravello Katy, TX 77449 USA 832.541.1084 [email protected]
DNV Calgary 2340 Pegasus Way, NE, Suite 123 Calgary, AB T2E8M5 Canada 403.250.9041 [email protected] www.dnvcalgary.com
