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03202 The use of Dedicated Simulation Software for the Design and Understanding of the Cathodic Protection of Underground Pipeline Networks under various Interference Conditions

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A simulation software for the cathodic protection (CP) of underground pipeline networks is presented.  In this paper, the software will be applied to two different cases. The first concerns the design of the cathodic protection of a 55 km pipeline section. The second is the evaluation of an existing pipeline network in the north-west of The Netherlands.

Product Number: 51300-03202-SG
ISBN: 03202 2003 CP
Author: Leslie Bortels
Publication Date: 2006
Industries: Cathodic Protection , Pipelines, Tanks, and Underground Systems
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A simulation software for the cathodic protection (CP) of underground pipeline networks is presented. This software uses an advanced model for the coating quality, taking into account the local soil resistivity, holiday ratio, average holiday size, coating thickness and coating resistance. The model considers the ohmic voltage drop in the pipes and integrates aboveground structures like rail bars, sub-stations, electric trains or trams and overhead wires. As a result, the model calculates both the “on” and “off” pipe-to-soil potentials along a pipe, the axial currents flowing through the pipes as well as the radial current densities leaving or entering the pipe walls. In this paper, the software will be applied to two different cases. The first one concerns the design of the cathodic protection of a 55 km pipeline section. The second one is the evaluation of an existing pipeline network in the north-west of The Netherlands. Keywords: simulation software, cathodic protection, pipeline networks, interference, “off” potential, “on” potential.

A simulation software for the cathodic protection (CP) of underground pipeline networks is presented. This software uses an advanced model for the coating quality, taking into account the local soil resistivity, holiday ratio, average holiday size, coating thickness and coating resistance. The model considers the ohmic voltage drop in the pipes and integrates aboveground structures like rail bars, sub-stations, electric trains or trams and overhead wires. As a result, the model calculates both the “on” and “off” pipe-to-soil potentials along a pipe, the axial currents flowing through the pipes as well as the radial current densities leaving or entering the pipe walls. In this paper, the software will be applied to two different cases. The first one concerns the design of the cathodic protection of a 55 km pipeline section. The second one is the evaluation of an existing pipeline network in the north-west of The Netherlands. Keywords: simulation software, cathodic protection, pipeline networks, interference, “off” potential, “on” potential.

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03710 INTERFERENCE TESTING AND CASE HISTORIES

Product Number: 51300-03710-SG
ISBN: 03710 2003 CP
Author: Jeffrey L. Didas
Publication Date: 2003
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Interference Testing is a task learned through education and experience and is one of the basic skills of Cathodic Protection Personnel. This paper will discuss interference testing and present some case histories, of basic static interference situations and the mitigation methods used.
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02111 NEW CP CRITERIA FOR ELIMINATION OF THE RISKS OF AC CORROSION AND OVERPROTECTION ON CATHODICALLY PROTECTED PIPELINES

Product Number: 51300-02111-SG
ISBN: 02111 2002 CP
Author: Yuji Hosokawa, Fumio Kajiyama, and Yasuo Nakamura
Publication Date: 2002
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New cathodic protection (CP) criteria were developed based on AC and DC current densities measured using coupons. Using these criteria, the design of CP systems for newly constructed pipelines, paralleling high voltage AC power lines, and  DC rail transit systems, was successfully performed.
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04192 Integrity Assessment of Pipeline Networks Through Close-Interval Potential Survey

Product Number: 51300-04192-SG
ISBN: 04192 2004 CP
Author: Jeremiah Emeka Mbamalu and Frederick Oba Edeko, University of Benin
Publication Date: 2004
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A close-interval potential (CIP) data survey on ~154 km of Crude Oil/Gas pipeline networks. This aim was to generate corrosion data to determine weak sections of the pipelines/flowlines and, to ascertain the effectiveness of the CP system and integrity of the Crude Oil/Gas pipeline networks. The pipeline networks were found safe for continued operation under its present condition.
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