本标准规定了以下要求:（1）帮助公用设施识别可能存在高风险的等级以上腐蚀的结构；（2） 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。

This standard provides requirements to:(1) help utilities identify structures that may be high risk for above-grade corrosion; (2) 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.