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This paper discusses the revision of SSPC-PA 9, “Measurement of Dry Coating Thickness Using Ultrasonic Gages.” This standard describes procedures to measure the thickness of dry, homogeneous coatings applied to concrete, wood, wallboard, plastic, fiber and composite material using commercially available ultrasonic coating thickness gages.
In the spring of 2014, a new SSPC-PA21 standard is scheduled to be published. Despite the fact that this is the second major revision in as many years, new technologies and techniques have been introduced since the 2014 standard was revised and sent to ballot. Some examples include a factory-calibrated coating thickness gauge with pre-defined surface profiles, as well as a scanning probe designed to be slid across a cured coating while taking readings in real time. When these new technologies are put into practice, dramatic improvements in overall inspection times and data accuracy can be seen.
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Over recent years there have been interesting developments in the way marine coatings and linings are specified that have unwittingly resulted in a situation that can make it challenging to meet a paint specification as currently written.
Conference Paper - This paper describes the requirements of the standard, additional inspection points, and several uses of the standard in the field where clear specification language was imperative to successful project completion. NACE 5/SSPC-SP 12 standard confined to water jetting - which makes use of ultra-high pressure water that is nonabrasive. Four levels of visible post-cleaning condition and three levels of non-visible condition are defined.