COURSE OVERVIEW

 

This practical and highly-interactive course includes various practical sessions and exercises. Theory learnt will be applied using our state-of-the-art simulators. 

 

The course will help the participants to improve compliance and reduce costs by guiding them through the development of the safety system including safety system layout, product selection and safety analysis to help them meet machinery safety performance level (PL) requirements as outlined by global standard (EN) ISO 13849-1. 

 

The operation of many industrial processes, especially those in the chemical or oil & gas industries, involve inherent risk due to the presence of dangerous chemicals or gases. Safety Instrumented Systems (SIS) are specifically designed to protect personnel, equipment, and the environment by reducing the likelihood or the impact severity of an identified emergency event. Explosions and fires account for millions of dollars of losses in the ch emical or oil & gas industries each year. Since a great potential for loss exists, it is common for industry to employ Safety Instrumented Systems (SIS) to provide safe isolation of flammable or potentially toxic material in the event of a fire or accidental release of fluids. 

 

IEC 61511 has been developed as a Process Sector implementation of the international standard IEC 61508: “Functional safety of electrical / electronic / programmable electronic safety-related systems.” The standard has two concepts, which are fundamental to its application; the safety lifecycle and safety integrity levels (SIL). The safety lifecycle forms the central framework which links together most of the concepts in this international standard. 

 

It is a good engineering procedure for safety instrumented system (SIS) design. In the safety lifecycle, process risks are evaluated and SIS Performance requirements are established (availability and risk reduction). Layers of protection are designed and analyzed. Finally, a SIS (if needed) is optimally designed to meet the particular process risk. Safety integrity levels are order of magnitude levels of risk reduction. There are four SIL’s defined in this standard, just as in IEC 61508. SIL1 has the lowest level of risk reduction. SIL4 has the highest level of risk reduction.  The standard suggests that applications which require the use of a single safety instrumented function of SIL 4 are rare in the process industry and that they shall be avoided where reasonably practicable. The standard is primarily concerned with safety-instrumented systems for the process industry sector (sensors, logic solvers and final elements are included as part of the safety instrumented system). It also deals with the interface between safety-instrumented systems and other safety systems in requiring that a process hazard and risk assessment be carried out. 

 

This course will explain the basic concepts, definitions and commonly used terms in Safety Instrumented Systems and provide a basic understanding of SIS related concepts. 

 

Further, the course discusses the fundamentals of ANSI/ISA 84.00.01-2004 Parts 1-3 (IEC 61511 modified). The course content is designed to provide the participant with an understanding of how to implement the requirements of the safety instrumented system (SIS) standards, to perform layers of protection analysis, to create a design to meet the safety integrity level (SIL), and to verify that the SIL has been achieved. It will also introduce the participant to the guidance contained in draft technical report, ISA TR84.00.04, which concerns implementation of ANSI/ISA 84.00.01-2004.