Estudo sobre sistemas instrumentados de segurança: conceitos, regulamentação e aplicações na indústria

Abstract

This study focused on process industry, presents concepts related to Safety Instrumented Systems - SIS, international regulations related and its developments. It covers relevant issues as: the different characteristics and requirements for safety systems and control systems; segregation required between control and safety systems by different industry standards and the normative references; exceptions permitted by the industry standards, both control function implemented on safety systems and Safety Instrumented Function - SIF on control systems. Briefly describe the LOPA technique for process risk analysis and selection of the Safety Integrity Level - SIL. Each stage of the life cycle of the SIS is detailed by following the steps set out in the standard IEC 61511-2003. Considerations about typical topologies for different SIL are shown, such as an example of industrial application and the most common settings of sensors and final elements. A specific application of SIS, HIPPS - High Integrity Pressure Protection System was also included among the applications. In the approach on the technology used, it must be noted the development of the Foundation Fieldbus protocol for executing Safety Instrumented Function, given the degree of innovation. Details of the project, known as FF-SIF, information on the results already achieved are brought to the reader.