What does SSPC-PA2 refer to?

SSPC-PA2 specifically addresses the procedures utilized to measure dry coating thickness to ensure compliance with specified requirements. This document provides a detailed methodology for inspectors to accurately measure the thickness of dry coatings on various substrates. Proper coating thickness is critical for achieving the desired performance characteristics, corrosion resistance, and longevity of the coating system applied. Ensuring that the coating thickness meets industry standards directly impacts the effectiveness of the protective coating.

The other options refer to different standards and procedures. Surface roughness measurement is not the focus of SSPC-PA2; rather, it is concerned with how to assess the thickness of coatings, which is distinct from roughness evaluation. While selecting protective coatings is essential in the overall coating application process, it falls outside SSPC-PA2's specific focus on measurement techniques. Additionally, standards for concrete surface preparation pertain to entirely different guidelines related to preparing a substrate prior to coating application, which is also separate from the purpose of SSPC-PA2.