Prioritization of maintenance by determining the priority number of risk, and analysis of modes and effects of failures of a high pressure polyurethane injection machine

Abstract

Prioritization of activities is very important, to know the importance of performing a maintenance activity. The Modes Analysis Methodology and Failure Effects (AMEF), is a tool that allows us to prioritize the maintenance care for equipment; currently this tool is applied to determine the risk level of the equipment, according on the study of equipment failures, their severity, occurrence probability and failure detectability. The methodology was applied to a high-pressure polyurethane injection machine; for this the work was divided into two parts. The first part was based on the Analysis and Performance Determination and its operational context within the production line, and the second part the equipment failure modes is determined, and based on them the risk of failures and failure modes was determined in a Number of Risk Priority. Giving us as result, 7 failure modes of the 16 analyzed, have a potential risk of happening, and can directly affect the performance of the equipment's operational context. Therefore maintenance activities with their respective priority are established. It was found that 7 of the 16 failure modes are potential main causes for equipment functional failure, therefore those must be prevented. The main problems of the equipment are: Partially clogged pipes, Inadequate temperature, based on the Priority Risk Number analysis, there is no electricity supply. It was determined that the tasks of Inspection and cleaning of pipe, Calibration of pressure and temperature controls, Checking the power supply and its parameters are tasks to avoid functional failures and decrease the equipment failure by 42.8%.