Báo Cáo Development of Third-Party Damage Monitoring System for Natural Gas Pipeline Using Acoustic Wave Det

Abstract
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This paper presents a real time monitoring system for third-party damage on natural gas pipeline.
When the damage due to third-party incidents causes an immediate rupture, on-line monitoring can
help reduce the consequences of the event. However, because many third-party incidents cause
damage that does not lead to immediate rupture but can grow with time, on-line monitoring can play a
significant role in reducing the number of third-party damage incidents. When a damage is given at a
point on natural gas pipeline, the acoustic wave is propagated very fast about 421.3m/s. The data
processing time must be very short. Usually, the pipeline is laid under ground or sea and the length is
very long. So a LAN data communication method is recommendable and the sensing positions are
limited by laid circumstance and setting cost of sensors. The calculation and monitoring software for
detecting the third-party damage is developed by an algorithm using the propagation speed of acoustic
wave and data base system. This paper provides the field testing being done to demonstrate its utility
for reactive detection of third-party contact with pipelines. Furthermore, the development system is set
at practical offshore pipeline of Young-jong-Do, Korea and it is being operated in real time.