Abstract
Intelligent inspection is wildly used in the integrity management of transmitting pipeline in service. Recently, the intelligent inspection data of one natural gas transmitting pipeline showed that lots of the blistering was found in the pipe inner surface. In this paper, the methods of OM, SEM and EDS et al were carried out to study the reasons of the blistering failure and proposed the safety countermeasures. The results show that the blistering failure of pipeline was mainly related to the hydrogen blistering and the manufacturing technology of the pipe. The sulfide stress corrosion (SSCC) and the manufacturing damage accelerated the blistering failure of the pipe.
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