Field-Applied Underground Wax Coating Systems for Underground Metallic Pipes: Application, Performance, and Quality Control

This standard describes the proper application and material characteristics of wax coatings for underground pipeline external corrosion protection. The scope of this standard is to establish minimum requirements to ensure proper application, inspection, and performance of field-applied wax coating systems for field repair, rehabilitation, or girth weld joints on buried, external steel substrates.

Included are guidelines for proper application and inspection to ensure the long-term performance of wax coating systems. The coating systems in the standard can be applied to girth weld joints during the construction of buried pipelines and their appurtenances that are used for conveying liquids or gases.

Changes were made within the document to increase its clarity and specificity where necessary. The technical changes made in this revision include the addition of profiling mastic to the standard, the addition of a definitions section, and the inclusion of requirements for an application procedure specification to be prepared by the application contractor.