Application of displacement monitoring system on high temperature steam pipe

4th International Conference on Mechanical Engineering Research

Ghaffar, M.H.A.^1 ; Husin, S.^1 ; Baek, J.E.^2

Materials Engineering Group, TNB Research Sdn. Bhd., Kawasan Institusi Penyelidikan Dan Latihan Bangi, No.1, Lorong Ayer Itam, Kajang, Selangor

43000, Malaysia^1

Korea Leading Engineering System, 40, Techno 3-ro, Yuseong-gu, Daejeon, Korea, Republic of^2

关键词: Coal-fired power plant;    Displacement measuring;    Displacement monitoring;    High temperature and high pressure;    High-energy piping systems;    Movement behaviour;    Periodic monitoring;    Transient conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/257/1/012026/pdf
DOI  :  10.1088/1757-899X/257/1/012026

来源: IOP

【 摘 要 】

High-energy piping systems of power plants such as Main Steam (MS) pipe or Hot Reheat (HR) pipe are operating at high temperature and high pressure at base and cyclic loads. In the event of transient condition, a pipe can be deflected dramatically and caused high stress in the pipe, yielding to failure of the piping system. Periodic monitoring and walk down can identify abnormalities but limitations exist in the standard walk down practice. This paper provides a study of pipe displacement monitoring on MS pipe of coal-fired power plant to continuously capture the pipe movement behaviour at different load using 3-Dimensional Displacement Measuring System (3DDMS). The displacement trending at Location 5 and 6 (north and south) demonstrated pipes displace less than 25% to that of design movement. It was determined from synchronisation analysis that Location 7 (north) and Location 8 (south) pipe actual movement difference has exceeded the design movement difference. Visual survey at specified locations with significant displacement trending reveals issues of hydraulic snubber and piping interferences. The study demonstrated that the displacement monitoring is able to capture pipe movement at all time and allows engineer to monitor pipe movement behaviour, AIDS in identifying issue early for remedy action.