Plant-Applied External Coal Tar Enamel Pipe Coating Systems: Application, Performance, and Quality Control

This standard establishes minimum requirements to ensure proper application and performance of a plant-applied coal tar enamel system to the external surfaces of pipe. Included are methods for qualifying and controlling the quality of a coal tar enamel system, guidelines for its proper application, and inspection and repair techniques to ensure its long-term performance.

This standard applies to coating systems used to prevent corrosion in conjunction with cathodic protection. Rationale

This revision of SP0399 includes the following updates:

• NACE TM0115 is referenced as an alternative option to ASTM G8. The requirements for cathodic disbondment testing permit a more direct comparison of coating performance from both qualification and production testing.

• To avoid contamination or other adverse effects on the coating, this revision requires products to be shipped and stored according to manufacturer instructions.

• Coating suppliers (manufacturers) are required to conform to local VOC requirements.

• Appendix A has been identified as nonmandatory.