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Monday, March 15, 2010: 1:00 PM
214 B (Henry B. Gonzales Convention Center)
The subject of a.c. corrosion on cathodically protected pipelines, even if already known, arose in the world of corrosion engineers only in the 80ies. Up to that time, only a few countries in Europe were involved and had experience on this subject, those where a.c. traction systems were used.
Starting from the 90ies, the problem of a.c. interference due to electricity power lines has massively grown, because of the intensive use of very high electrical resistance coating of pipelines, but also due to the increasing number of parallelisms of electricity power lines and the development of high speed trains, fed with alternating current.
The problem of reducing a.c. interference on gas pipelines so that a.c. corrosion could be minimized is the origin of quite a harsh controversial debate in Europe; nonetheless, a Technical Specification has been delivered in the framework of CEN (European Committee for Standards) Works, the CEN/TC 15280, March, 2006. This Technical Specification is nowadays going to be transformed into a full validity Standard.
The paper highlights the State of the Art in the technical/scientific knowledge of this rather tricky subject. It’s mitigation, the studies and the issue of relevant Standards & Recommendations will also be dealt with.
Starting from the 90ies, the problem of a.c. interference due to electricity power lines has massively grown, because of the intensive use of very high electrical resistance coating of pipelines, but also due to the increasing number of parallelisms of electricity power lines and the development of high speed trains, fed with alternating current.
The problem of reducing a.c. interference on gas pipelines so that a.c. corrosion could be minimized is the origin of quite a harsh controversial debate in Europe; nonetheless, a Technical Specification has been delivered in the framework of CEN (European Committee for Standards) Works, the CEN/TC 15280, March, 2006. This Technical Specification is nowadays going to be transformed into a full validity Standard.
The paper highlights the State of the Art in the technical/scientific knowledge of this rather tricky subject. It’s mitigation, the studies and the issue of relevant Standards & Recommendations will also be dealt with.