本标准提供了现场测定金属结构或制造物上保护涂层系统或其部件涂层厚度范围和平均干膜厚度的实用试验方法。可采用该方法的涂层制品包括储罐或储罐、桥梁、用于加工化学品或石油的设备、管道以及诸如车辆、白色家电和其他工业生产物品等物品，这些物品的基底厚度、金相特征、表面状况和保护涂层的薄膜缺乏一致性。

This Standard provides practical test methods for the on-site determination of the range of thicknesses and the mean dry film thickness of a protective coating system, or its component coats, upon a metallic structure or fabrication. The coated fabrications to which the methods may be applied include tanks or reservoirs, bridge girders, equipment used in processing chemicals or petroleum, pipelines, and articles such as vehicles, white goods and other items of industrial production, where there is lack of uniformity of substrate thickness, metallographic character, surface condition and the film of the protective coating.