STUDYING BOILER RELIABILITY IN A PETROLEUM REFINERY BY USING FAULT TREE ANALYSIS

Abstract

The paper deals with studying and analyzing of the affecting factors on the performance of an old steam boiler operated manually, such as operational parameters deviation and human errors that include operational, maintenance, and test staff, and the influence of those factors in the sustainability of the steam production and their impact on other boiler components.Engineering safety analysis method (front and back analysis) had been used to study those factors and to find points of failure, and to clarify the relationship between the types of failure and possible events, which facilitate reliability analysis technique.A PC program in visual basic language was designed as a tool to perform periodical evaluation of boiler reliability and its operational systems, draw boiler reliability as a function of time, and the variation of boiler failure rate with time.It is found that the maximum failure rate of the boiler under consideration is (0.000742) and it occurs when the operation time reaches about seven months. After that the boiler failure rate will be constant.