电力设施钢制输配电结构的埋地或地下部分经常受到腐蚀性环境的影响，不容易进行目视检查。在本标准发布之前，没有任何行业惯例可帮助电力公司确定待检查结构的优先列表，或描述评估等级以下腐蚀问题的检查和评估程序。本NACE/IEEE联合标准适用于电力公司人员、承包商、检查员以及对输电、配电和变电站钢结构地下部分腐蚀影响感兴趣的人员。 它提供了以下要求:（1）帮助公用事业公司识别可能存在低等级腐蚀高风险的结构；（2） 挖掘并检查选定的结构；（3） 根据腐蚀退化对结构状况进行分类；（4） 根据这些调查结果，优先考虑需要额外检查的结构；（5）根据需要帮助确定下一步的步骤。本标准仅限于耐候钢输电塔、杆塔、变电站结构和其他类似结构的检查和评估。

The buried or below-grade sections of electric utility steel transmission and distribution structures are often subject to corrosive environments and are not easily accessible for visual inspection. Prior to the publication of this standard, no industry practice existed to help electric utilities determine a prioritized listing of structures to be inspected or that described an inspection and assessment procedure to evaluate below-grade corrosion problems.This joint NACE/IEEE standard is intended for use by electric utility personnel, contractors, inspectors, and those interested in the impact of corrosion on the below-grade sections of transmission, distribution, and substation steel structures. It provides requirements to:(1) help utilities identify structures that may be at a high risk for below-grade corrosion;(2) excavate and inspect the selected structures;(3) categorize the condition of structures based on corrosion degradation;(4) prioritize structures requiring additional inspection based on those findings; and(5) help identify next steps as required.This standard is limited to the inspection and assessment of weathering steel transmission towers, poles, substation structures, and other similar structures.