Journal of Failure Analysis and Prevention

, Volume 13, Issue 2, pp 202–206 | Cite as

Failure Analysis of a Copper Tube for Pneumatic System

  • L. S. Araujo
  • L. H. de Almeida
  • D. A. Pereira
Technical Article---Peer-Reviewed


Deoxidized-high-phosphorous (DHP) copper tubes are widely and successfully used in different applications as: water distribution, air-conditioning, solar heating, fuel, oil, and natural gas services and compressed air systems. In the present analysis, a failure of a copper tube composing a pneumatic system of a subway train was investigated by means of on-site examination, metallographic and fracture analyses. Results show that arcs coming from an exposed power cable lead to partial melting of a section of the tube, resulting in loss of pressure and interruption of the train.


Failure analysis Copper tube Pneumatic system 


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Copyright information

© ASM International 2013

Authors and Affiliations

  • L. S. Araujo
    • 1
  • L. H. de Almeida
    • 1
  • D. A. Pereira
    • 2
  1. 1.PEMM/COPPE-Federal University of Rio de JaneiroRio de JaneiroBrazil
  2. 2.MetroRioRio de JaneiroBrazil

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