In this paper there are outlined the investigation results of a technical accident that took place recently on a natural gas transmission pipeline, due to the damage of one of the pipes, caused by a third party interference. In order to determine the failure conditions of the pipeline that experienced this technical accident, the authors used more assessment procedures for defects like dent – gouge combinations, generated by third party damages upon this pipeline. The results of the research performed led to the selection and assigning of the measures that have to be taken in order to keep at an allowable level the risk for such events to occur on natural gas transmission pipelines.
