Evaluation of the effectiveness and strength characteristics of Scotchkote® 2400 pipe coating

Issue 25(3) 2020
Pages 7-16

O.G. Primin, Moscow State University of Civil Engineering, “MosvodokanalNIIproject” JSC, Moscow, Russian Federation

Keywords: coating, pipeline, corrosion, technology, strength, calculation

The article is concerned with the current problem of restoring the required performance of water pipelines of public water supply systems. The effectiveness of using trenchless pipe rehabilitation technologies is noted. The article analyzes the results of the experiments for determining the strength characteristics of Scotchkote® 2400 protective corrosion resistant coating of pipes that were carried out in the laboratory of the Water Supply and Sanitation Department of the Moscow State University of Civil Engineering with Instron 3345 electromechanical tensile testing machine. The effectiveness of Scotchkote® 2400 protective coating relative to restoring and improving the strength and hydraulic characteristics of worn water pipelines was shown. The author comes to the conclusion that Scotchkote®2400 protective coating is a substantial alternative to cement-sand and other internal coatings, since in many respects it surpasses them owing to the ability of colmatage sealing of large diameter holes; high wear resistance; smooth surface; ability to endure high hydraulic pressures. The coating does not overlap service connections and slightly reduces the diameter of the restored pipelines. Based on the studies, comparative characteristics of Scotchkote® 2400 protective coating spraying technology with the basic methods of trenchless pipeline reconstruction are presented. Mathematical processing of the results of experimental studies of the physicomechanical characteristics of Scotchkote® 2400 coating is given. As a result of the studies, the calculated values of the protective coating thicknesses for partially worn and completely worn out pipelines are obtained and recommended.