Papers by Keyword: Third-Party Damage

Abstract: This study was carried out to assess risk assessment of Third-party damage index for a gas transmission pipeline around a suburb in Benin City, Edo State, Nigeria. A full length walk survey was carried out for the 12 km gas transmission pipeline of the Nigeria Gas Company that transcends Uteko community via Benin Auchi road through Osina town and some part of Benin Agbor road, all in Edo State of Nigeria. The 12 km pipeline facility surveyed was sectioned into a total of 60 test points (labelled P1 to P60), each test point measuring up to 200 m. The surveyors examined the third party index variable score for each of Minimum Depth of Cover, Activity Level, Aboveground Facilities, Line Locating, Public Education, Right-of-way Condition, and Patrol Frequency third-party variables. An overall third-party index score of 29.87% was obtained. This means that the surveyed 12 km pipeline is highly susceptible to failure due to third-party activities. This was perceived to be the consequence of the high level of insensitivity to, and lack of proper control of the third party activities taking place in the facility location. The study suggested measures to be employed in order to mitigate possible damages to the pipeline occasioned by third party activities, thereby bringing to the fore, the current drive to ensure pipeline safety and integrity.

Abstract: The third-party damage is the main factor of Daqing-Harbin oil pipeline failure. This paper analyzes a variety of factors causing the third-party damage, and establishes the fault tree model. By analyzing the minimal cut set and structures importance degree of fault tree, the main factors of the third-party damage that caused pipeline failure are determined. The main factors are as follows: Lack of pipeline conditions, human vandalism, the frequency of line patrol and management systems, lack of public education and the legal concept, and construction operation injury. On the basis of analyzing the factors, the precautions of the third-party interference are proposed.

Abstract: Even though an excavation is not under the direct control of the utility operators, it is the main cause of third-party damage on the underground natural gas pipelines. Since the damage due to third-party excavation may lead to horrible consequences, preventative techniques that can reduce the third-party damage are needed. The purpose of this paper is to introduce an on-line monitoring system using accelerometer to detect a propagating acoustic pressure pulse that is produced from the third-party damage. Also, in order to verify this system, the corresponding field tests were performed considering many third-party damage sources(breaker, hammer drilling, etc.) and signal transmission ratio of each source. From the tests, signals developed by the third-party damage sources were successfully detected with the digital filter, which can distinguish external noises at the distance of 13km. Therefore, it is expected that the system can be used as a useful tool for the third-party damage monitoring of underground natural gas pipelines