外腐蚀直接评价在城市燃气管道的应用

Application of External Corrosion Direct Assessment to City Gas Pipeline

管道外腐蚀直接评价(ECDA)是进行城市燃气管道完整性管理的重要手段。论述了ECDA的4个基本步骤——预评价、间接检测、直接检测、后评价。结合华南某市中压燃气管网的实际情况,将ECDA应用于城市燃气管道实际工程中,取得了良好的效果并为管道的完整性管理提供可靠依据。

The external corrosion direct assessment （ECDA） is an important method for city gas pipeline integrity management （PIM）. The four basic process steps of ECDA including pre-assessment, indirect inspection, direct inspection and post-assessment are discussed. Combined with the actual situation of medium pressure gas network in a city of South China, the ECDA is applied to the actual project of city gas pipeline, and good results are achieved, which provides a reliable basis for PIM.