| Summary: | 碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程研究所 === 104 === The conventional equipment management philosophy in petro-chemical plants is passive and repair-oriented, that is, maintenance is only initiated when breakdowns and/or leakages are found. Gradually, even government regulations mandate inspection on some of the pressure equipment and piping. Also, equipment related international standards move even further to suggest performance based practices. The most recent equipment codes require piping, controls and pressure equipment to all be inspected periodically.
The Risk-based inspection(RBI) technology as described in API 581 focus largely on the risk of chemical leakage from process equipment and piping. With knowledge of the potential risk, one can then plan and schedule inspections in order to reduce or mitigate risk due to leakage. In order to perform RBI quantitatively, numerous historical data from process, inspection, repair, as well as plant management are required. And it has almost become an industrial standard for a petro-chemical plant to perform RBI, which, on the other hand, makes others in chase further behind. As for most of the domestic chemical plants, plant operation and maintenance data was never well preserved and utilized. Without quality data, RBI analysis will be very difficult.
In this study, all the parameters required for RBI analysis is gathered, with which we can investigate how each parameter affects risk in calculation. An Excel-based RBI program has been created in order to demonstrate the process.
When properly implemented, the RBI is realized through a well-tuned and optimized inspection plan, which is totally PDCA-conformed. To those who seeking a permit to extend required inspection interval of pressure equipment, RBI is so far the most widely accepted methodology. Integrating RBI with plant asset management system, the whole life cycle data of plant asset should be well documented and analyzed, so that the plant can know remaining life of each critical equipment, when one should be replaced without putting the whole manufacturing in jeopardy.
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