石油化学プラント機器の破壊防止法に関する検討

抄録

In order to prevent the failure of petro-chemical plants, safety assessment based on fracture mechanics is required. However, the analytical condition and the material properties are not always clear or known. For an unfavorable condition, rational assumptions with empirical background are required to be introduced. In this paper, the procedure to determine the hot start temperature and the allowable crack size for actual reactors in the lack of data is explained and the analyzed results are shown.
In the case that some defects are detected during operation, the defects are usally removed and repaired with weld. However, as welding at the operating site may cause damage in some cases, repairing by grinding and smoothing is recommended in the paper. The procedure to determine the optimum shape in smoothing was proposed and is applied to an actual spherical storage tank.