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Transmission Tower and Pole Painting - A Challenge for All Involved

Transmission Tower and Pole Painting can be a challenge for the owner, their inspection staff, and the contractor. Transmission Structure painting also requires a specialized skill set which leads to worker safety, protection of owner’s equipment, surface preparation options, material selection, quality control / quality assurance documentation and the cost effectiveness of the project. 

Product Number: 51217-047-SG
Author: Matthew McCane, Curt Hickcox
Publication Date: 2017
Industry: Coatings
$0.00
$20.00
$20.00

Transmission Tower and Pole Painting can be a challenge for the owner, their inspection staff and the contractor. Transmission Structure painting also requires a specialized skill set which leads to worker safety, protection of owner’s equipment, surface preparation options, material selection, quality control / quality assurance documentation and the cost effectiveness of the project. This lecture will discuss typical means and methods of surface preparation, coating application, recommended worker training, tower terminology and examples used in this industry. Transmission towers and poles, whether they are painted or galvanized carbon steel structures, will ultimately oxidize and corrode over time. Paint and galvanizing serve the same function; the protection of the carbon steel substrate by providing an exposure barrier to corrosion attack. Without properly planned and executed maintenance plans, utility owners may need to invest in untimely and costly structure replacement. This type of scenario is not exclusive to transmission towers in fact the much of the infrastructure in the United States are seeing the same issues.

Transmission Tower and Pole Painting can be a challenge for the owner, their inspection staff and the contractor. Transmission Structure painting also requires a specialized skill set which leads to worker safety, protection of owner’s equipment, surface preparation options, material selection, quality control / quality assurance documentation and the cost effectiveness of the project. This lecture will discuss typical means and methods of surface preparation, coating application, recommended worker training, tower terminology and examples used in this industry. Transmission towers and poles, whether they are painted or galvanized carbon steel structures, will ultimately oxidize and corrode over time. Paint and galvanizing serve the same function; the protection of the carbon steel substrate by providing an exposure barrier to corrosion attack. Without properly planned and executed maintenance plans, utility owners may need to invest in untimely and costly structure replacement. This type of scenario is not exclusive to transmission towers in fact the much of the infrastructure in the United States are seeing the same issues.

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Picture for Corrosion Risk Assessment Corrosion Mitigation Strategies and Repair For Aging Weathering Steel Transmission Pole Structures
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Corrosion Risk Assessment Corrosion Mitigation Strategies and Repair For Aging Weathering Steel Transmission Pole Structures

Product Number: 51319-13312-SG
Author: Mehrooz Zamanzadeh
Publication Date: 2019
$20.00

Accelerated corrosion of aging transmission structures in electric power transmission lines is a leading cause of in-service equipment degradation. Each year utility companies spend an increasing amount of their revenue on inspection and refurbishment of corroded structures and maintenance of the large population of aging structures has become a serious engineering and economic problem.As these assets age corrosion at the ground level is becoming a key risk to weathering steel structures as metal thickness loss leads to a reduction in structural strength potential asset failures reduced system reliability and costly repair or replacement. Preventative maintenance for steel structures has quickly become an important topic for engineers to consider both during design and in the field in order to reduce the costs of corrective maintenance many decades later.Accordingly effective and economically feasible corrosion mitigation techniques specifically designed for weathering steel transmission poles are in high demand.In this paper the principal corrosion mechanisms for weathering steel utility pole structures at and below the ground level will be discussed considering specifically; corrosion risk stress calculations FEA analysis corrosion mitigation and repairs.Coating and cathodic protection (CP) are the most effective methods for mitigating corrosion in aging transmission lines rovided that the designer considers the corrosivity of the environment the potential for and mechanisms of cathodic protection shielding characteristics for grounding and soil corrosivity. The potential to which the structure must be polarized also needs to be considered while taking into account the grounding and soil resistivity. This potential determines the degree to which the corrosion rate is reduced below grade.The case history portion of the paper will include actual projects that involved both accelerated corrosion at the ground level coating degradation coating selection and computer aided design for cathodic protection.Key Words: Weathering Steel Transmission Pole Ground-line Corrosion Protective Coatings Ground Sleeves Soil Corrosion Pack-out Corrosion Risk Assessment Cathodic Protection Welding Load Bearing Member FEA Analysis Transmission Structure Repair Protective Maintenance Corrective Maintenance