Corrosion

High Speed AC Railways & Pipelines - Corrosion and Safety Risks

This presentation was made by Ken Lax, Technical Director of Corroconsult, on behalf of the Pipeline Industries Guild (PIG) Onshore Panel as part of their ongoing free webinar series.

The aim of the presentation is to provide information to pipeline operators about the risk of accelerated corrosion and unacceptable touch potentials caused by high speed AC trains.

The presentation covers the following:

  • Corrosion risks

  • Risks to Personnel and the Public

  • Induction

  • Conduction

  • Mitigation

The presentation makes reference to the relevant sections of the following standards:

  • ISO 18086

  • BS EN 50443

  • IEC 60050-195-05-09

  • BS EN 50122-2

  • BS EN 50162

  • ISO 21857

Additional content for the presentation prepared by Richard Lindley (Corroconsult), Matthew Bamber (Corroconsult) and Charalambos Charalambous (University of Cyprus).

ISO 21857 - Evaluating DC Stray Current Voltages

ISO 21857 - Evaluating DC Stray Current Voltages

Interference from dc traction systems can result in pipe-to-soil potentials outside of the acceptable limits.

The Q method is an established procedure for evaluating the time varying potentials and empirical guidelines have been developed to allow a judgement of the corrosion risk caused by the interference.

The method can be used to evaluate current densities as well as potentials.