Reliability Evaluation and Risk Based Maintenance in a Process Plant - Science Assignment Help

Assignment Task:

Abstract

An effective operation of process plant depends on the maintenance practices followed and its operating reliability. In process plants having increasing demand for its product, the effective operation is very important. This must be met by increasing its production. Prior to an increase in production, reliability evaluation and maintenance planning are unavoidable. Ultimate aim is to increase the performance of the machineries without compromising safety or environmental issues. Maintenance strategies of the plant affect the performance of the machineries and hence affects production. Allocating more maintenance resources for the components having high risk of failure will improve the total availability of the system. Thus it is considered as the first step to improve reliability of components. Calculating availability of the plant will give a good measure of reliability of the components in the system. Assessment of the risk of failure is equally important as reliability evaluation and plays an important role in improving plant availability.

Introduction

In today’s competitive environment, companies are under intense pressure to sell their products in the market. Process plants having high demand for its product may have to run for more time. Without planning a preventive maintenance schedule, failures can happen in the process systems at any level. Downtime happens only when there is a replacement or repair for worn-out parts. The time for which the components work successfully between its replacements is defined as its life. Reliability, describes the ability of a system or component to function under specified conditions for a specified period of time. It is theoretically defined as the probability of failure, the frequency of failures, or in terms of availability. The use of less reliable components and the lack of perfect maintenance schedule are main concerns and will lead to plant failure eventually. Unexpected failures usually have adverse effects on the environment and may result in major accidents. Various studies have been done in this field by Khan [1] and Haijun Hu [2], shown the close relationship between maintenance practices and the occurrence of failures of the system. The main challenge is to implement a maintenance.

Proposed model

2.1. Description of the model

One of the main objectives of Risk based maintenance (RBM) is to minimize failures of the components without affecting the environment. This approach uses information obtained from the study of failures and their consequences. Risk analysis is a technique for identifying, characterizing, quantifying, and evaluating the loss due to an event. Risk analysis approach integrates probability of failure and consequence analysis. It aims to improve maintenance planning and decision making by reducing the probability and consequences of failure of equipment. This is done so that the maintenance effort is optimized to minimize the total risk of failure [1]. The proposed model to improve the availability of the system is shown in Figure 1.

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