Safety Integrity Level (SIL) Course

No Date Location Register
1 17 - 18 Jun 2021 Please call us Register
2 11 - 12 Oct 2021 Please call us Register


An assignment of SIL is an exercise in risk analysis where the risk associated with a specific hazard, that is calculated to be protected against by a SIF, is determined without the beneficial risk devaluation effect of the SIF. The risk come up and unmitigated risk is then compared against a tolerable risk target. The difference between the unmitigated risk and the tolerable risk, if the unmitigated risk is higher than tolerable, must be addressed through risk reduction of the SIF. This amount of required risk reduction is correlated with the SIL target. In essence, each order of magnitude of risk reduction that is required correlates with an increase in one of the required SIL numbers.

The International Electro technical Commission (IEC) provides an IEC61508 & IEC 61511 standard. These codes are established rules of the design, and selection of safety instrumented systems (SIS), they are the statistical representations of the reliability on the particular functions when a process demand occurs. The objective of the rules is to provide a margin for SILs in service, such as; SIL 1, 2, 3, and 4. This course will centres on the on the practical aspects of SIL and the methodologies used for determining SILs that are include but are not limited to; LOPA, Safety layer, FTA and also discuss an overview various steps for assignment of target SIL



·         Learn the core concepts of fundamental SIL & application in industry

·         Understand how to modify & improve the existing control system without avoid the safety and business aspects.

·         Learn the importance of good maintenance procedures for the integrity of your systems

·         Gain an understanding of the regulatory requirements for safety instrumented systems

·         Learn how implement the tools of SIL based upon the IEC and the other standard a basic to control production program

·         Be able to measure the reliability of SIS outcomes




·         Introduction

o    OSHA and EPA regulations

    • CCPS guideline documents
    • The Safety Life Cycle – IEC61508
  • Developing the System Requirements
    Layers of protection and LOPA
    • Inherently safer design
  • Safe Instrumented Function (SIF) Performance Calculations
    • Probability of failure on demand (PFD)
    • Spurious trip rate
  • ANSI/ISA-84.00.01-2004 (IEC 61511 Mod) Overview
    • Safety integrity levels (SIL)
    • Hardware fault tolerance of SIF architectures
    • Proven in use and certified devices and logic solvers
    • Safety requirements specification (SRS)
  • Introduction to Devices and Failures
    • Device failure modes
    • Common cause failure
    • Diagnostics

·         Process Hazard Analysis

·         Layer of Protection Analysis

·         Safety Integrity Level selection

·         Probability of Failure Demand

·         Hardware Fault Tolerance

·         .Case Study