Preliminary Risk Analysis for Execution Activity of External Natural Gas Network – Case Study

Abstract

The application of the Preliminary Risk Analysis - APR and the Hazard Rating Number-HRN, a necessary tool for risk management, in gas infrastructure works, is still neglected by the companies that perform this type of work. In this sense, the objective of this study is to carry out a risk analysis in a work of execution of a natural gas network developed in the municipality of Paulista, state of Pernambuco. The methodology consisted of identifying risks, evaluating and proposing control measures through the application of the APR and the HRN. With the application of the method, the risks, their causes and consequences were identified, which were later analyzed regarding their degrees of severity, probability of occurrence of the owner, frequency of exposure and number of people exposed. Through the results obtained, it is verified that all the mechanical and ergonomic riches were classified as "high", and among these, the ones that presented the highest values ​​are those of trampling and explosion, because they have greater numbers of exposed people and a high degree of exposure. of severity. Finally, it was noticed that this type of work is subject to work accidents that can be circumvented by adopting relatively simple measures, such as signaling work, training and using PPE. In this context, the application of such tools proved to be important in the risk management process, and if, in fact, it is applied correctly, it can contribute to reducing the number of work accidents in gas network works.