This standard describes the materials and application of tape coating systems in coating plants at fixed sites using coating techniques and equipment as recommended by the tape coating manufacturer. For normal construction considerations, prefabricated polyolefin tapes are applied as a three-layer system consisting of liquid adhesive, corrosion-preventive tape (inner layer), and mechanical-protective tape (outer layer). This standard establishes the minimum requirements for tape coating systems used on the exterior of steel water pipelines in the potable-water supply industry. Continuous monitoring of all application procedures for the tape coating systems shall be performed by the constructor. The major revisions made to the standard in this edition include the following: changes were made in Sec. 4.4, describing the pipe surface preparation procedure using abrasive-blast-cleaning methods, along with consistent terminology for abrasive blast cleaning, abrasive mix, and visual comparative standards; a new section, Sec. 4.4.2.8, on weld height limits was added; provisions for the use of heat-applied repair patches in accordance with ANSI/AWWA C216 were added in Sec. 4.4.4; and, provisions for the use of an electronic-magnetic thickness gauge were added in Sec. 5.3.2.