在用埋地管道不开挖检测技术

Indirect Nondestructive Testing Technique for In-service Buried Pipelines

埋地管道在石油、天然气等液体和气体介质的输送中得到广泛使用,由于其所处环境和工况相对恶劣,因而具有泄漏污染甚至爆炸的潜在危险性。不开挖检测技术在确保埋地管道使用过程的安全运行中扮演最重要的角色之一。综述了埋地管道运行过程中分别采用的各种不开挖检测技术,包括土壤环境的腐蚀性检测、外覆盖层检测和阴极保护检测等,并论述采用这些检测技术的优缺点和使用目的。

Buried pipelines are widely used in the transportation of liquid and gas media such as crude oil and natural gas. Because of severe working environment, leakage and explosion are likely to happen. The indirect testing technique plays one of the most important roles for insuring operation safety for buried pipelines. The indirect testing techniques used by in-service testing of buried pipelines are reviewed, including in testing thc soil corrosion, coating and the cathode protect（CP） of pipelines. The advantage, disadvantage and purpose using lhese indirect testing methods are indicated.