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Using Small-Scale Testing in Integrity Assessment of Clad Pipes

[+] Author Affiliations
Afshin Motarjemi

Det Norske Veritas (DNV) Ltd., London, UK

Paper No. PVP2008-61704, pp. 1371-1378; 8 pages
doi:10.1115/PVP2008-61704
From:
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4829-6
  • Copyright © 2008 by ASME

abstract

Utilization of clad pipes has significantly improved the performance of components used in the oil and gas industry because of their potentially higher corrosion resistance. However, a clad pipe has more complexity than a solid pipe in terms of fracture mechanics based fitness for service (FFS) assessment. To be able to properly address this issue, precise mechanical data, such as tensile properties and fracture toughness values of the both cladding and the backing materials should be known. However, as the cladding layer is normally thinner than the backing material, conventional specimens are unable to provide the required mechanical data and instead small-scale tensile and fracture toughness specimens should be used. Current paper will introduce some of the small-scale mechanical testing techniques that may be used to determine the required input data for performing a fracture-mechanics based FFS assessment of a clad pipe.

Copyright © 2008 by ASME
Topics: Pipes , Testing

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