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Paint and Coatings Industry Standards
G12 Standard Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel
3.1 Measurements of film thickness are an essential part of most ASTM test methods related to coatings on steel pipe. Adequate thickness is important for a coating to fulfill its function of preventing or mitigating corrosion of steel pipelines.
3.2 The accuracy of the thickness measurements may be influenced by the deformability of the coating. This test method is not applicable to coatings that would be readily deformable under the force exerted by the probe of the measuring instrument.
