||There are various pipelines with different materials and sizes in Petrochemical Plants, and they usually used to transport high temperature, high pressure and even corrosive fluid. During the service period, environments and metal material will have impact on the pipelines and thus leads to various types of corrosions. The worse cases are the pipelines break and leak toxic or flammable materials, which pollute the environment or even bring about fire explosion, and thus lead to huge economic losses. |
According to the investigation, due to the factors of the environment and the necessities of the production, the corrosion types of pipelines in Petrochemical Plants usually are Uniform Corrosion, Galvanic Corrosion and Pitting Corrosion. Therefore, this research is meant to collect cases of huge industrial accident in Petrochemical Plants all over Taiwan. By analyzing the corrosion cause, classify corrosion types. Focus on corrosion environments and corrosion impact factor. Using two types of Boundary Element Method softwares, BEASY CP and BEASY CRACK, to analyze the Corrosion Contour, to simulate the corrosive mechanisms, to calculate the corrosion rate and calculated the corrosion rate from the corroded pipeline, simulation pipeline in decrease in thickness due to corrosion, and the strees concentration cause corrosion crack problem and leading pipelines broken. The result of this research is expected to provide the Petrochemical Industry in predicting the present pipelines situation, so as to achieve FFS (Fitness for Service), for the competent authority of factories to refer. Further, by BEASY CP prediction corrosion rate can simplify the electrochemical experiments spend time. As BEASY CRACK can predict current pipelines fatigue loading in the petrochemical plant, to let the competent authority of factories to replace old pipelines by new pipelines. In addition, by operation of BEASY CP and BEASY CRACK, to let everyone have a better understanding for these two sets of softwares.