Materials Performance

MAY 2015

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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REPRINTS ARE A GREAT INVESTMENT! Professionally printed reprints and photo copied reprints of all MP ads, articles, and covers are available for purchase. Reprints can be customized with your company's logo, additional product information, or the magazine cover—with no limits on creativity! Order your reprints today; it simply makes good business sense! For reprint information and rates, call +1 281-228-6287. Need reprints of MP ads, articles, or covers? 51 NACE INTERNATIONAL: VOL. 54, NO. 5 MATERIALS PERFORMANCE MAY 2015 COATINGS & LININGS ESSENTIALS Continued f rom page 49 Developing Selection Criteria for Field-Applied Pipeline Coatings A hand wrapster is used to apply mesh- backed tape coating. Many types of feld-applied coatings have been used on pipelines around the world. Some are no longer used, while others are being developed to meet the demands of the changing environments where pipelines are installed. Coatings are exposed to conditions such as operating temperatures, soil stress, and backfll. Because environ- mental conditions exist not just during application, but throughout a coating's service life, the coating system must be properly selected for the environment. Understanding the properties and all the variables associated with a particular coating system is very important when selecting one that will provide many years of successful corrosion control for the pipeline. Ultimately, it is up to the end user to make the proper decisions about coating selection, application, and inspection processes. A thorough set of specifcations gives the guidance needed to ensure proper coating performance. Various testing programs that have been developed provide performance information on the variety of coating types available to the industry. Rigorous inspections by experienced and qualifed inspectors will help guarantee proper surface preparation and coating application are performed. In CORROSION 2015 paper no. 6116, "Developing Selection Criteria for Field Applied Pipeline Coatings," by R. Norsworthy, D. D'Ambrosio, and M. Quinn, four popular types of feld-applied coating systems are discussed: mesh-backed tape systems, shrink sleeves, two-part epoxies, and solid flm- backed tape systems. Tese four generic coating systems are some of the most popu- lar for feld application and are very good coating systems when adhered to the pipe surface. Additionally, a comprehensive table is presented that compares the basic param- eters of these generic feld-applied coating systems, such as typical in-feld use; surface preparation, primer and heat requirements; ease of application; etc. Te information is a culmination of the authors' 30-plus years of experience in the pipeline and corrosion control industry, which has involved many coating tests, feld exposures, and evaluations. Although the fnal service life and performance of these coatings will depend on many variables, these charts give information that should be considered or discussed before a system is selected for use.

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