管道的密闭检查是防止管道泄漏、确保管道安全运行的重要措施，其作业技术要求高，难度大，为了解决以往所采用的测量设备灵敏度低，不能及时、准确地发现长输管道的泄漏这一弊端，提出了新的检测泄漏方法，使得检测精度大大提高，本文对此作了较为详细的介绍。 Sealed pipeline inspection is to prevent pipeline leakage, to ensure the safe operation of pipelines an important measure of its operating technical requirements, difficult, in order to solve the previously used low sensitivity of measuring equipment, can not be timely and accurately find the long-distance pipeline leakage Disadvantages, proposed a new method of detection of leakage, making the detection accuracy greatly improved, this article made a more detailed introduction.