Pipelines have become the life-lines of many countries and industrial operations, and a major problem associated with pipeline operation is associated with pipe material corrosion of various types. A pipeline can be as simple as a product transportation from one vessel to another, or as complex as a product transfer mechanism across countries with widely varying climatic conditions. Pipelines are both surface and buried structures, and in most cases may be considered as long thin pressure vessels. There are specific problems associated with acoustic emission monitoring of pipelines; however, many of these problems have been overcome or are taken into consideration during any competent acoustic emission monitoring program. The surface or boundary conditions of the pipe are one of the more difficult parameters to cope with in such a test. While it is possible to monitor some pipelines with very large sensor spacings, these long distances frequently are reduced by a factor of ten or more and usually a hundred for buried pipelines. However, Metacoustics has developed modifications to the acoustic emission techniques which allow for realistic long-or short-term monitoring of just about any pipe configuration. These include desert situations, open landscape pipes, buried pipes and industrial piping within plants. The more sophisticated Metacoustics instrumentation allows for long-term remote monitoring, which is important as typical deformation in pipelines does not usually activate when being monitored briefly.