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远场涡流（RFEC）技术利用一种电磁探测器来找出管道腐蚀和其它内部损伤。在检查类似热交换器和锅炉内的小口径铁磁性管中，RFEC是一种很有效的方法。以前，用RFEC技术断定受损管子金属损失的深度必须依赖经验和判断力，RFEC信号的相位能指出金属损失的存在，但不能直接揭示其深度。本文描述的一种改进的信号解释方法能够估计金属损失的深度和损失的周边范围。讨论了RFEC检测的优点和检测时的限制，并提供了最近一次在美国使用RFEC检测得到的现场数据。
Far-Field Eddy Current (RFEC) technology utilizes an electromagnetic detector to detect pipe corrosion and other internal damage. RFEC is a very effective method of inspecting small diameter ferromagnetic tubes in similar heat exchangers and boilers. Previously, using RFEC techniques to determine the depth of damaged tube metal loss had to rely on experience and judgment. The phase of the RFEC signal could indicate the presence of metal loss, but its depth could not be revealed directly. An improved method of signal interpretation described in this paper can estimate the depth of metal loss and the loss of the perimeter range. Discusses the advantages and limitations of RFEC testing and provides the most recent field data using RFEC testing in the United States.