COURSE CONTENT (in-company) · -Example of report with the exSILentia tool. Module 7 (SILcet is used) Note: Other additional exercises that are delivered resolved to the participants

Enertria / ETC-FunSafe: Content of the Course – Design of SIFs and SIL Calculation (v2) Page 1 of 6

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Design of SIFs and SIL Calculation (version v2)

Design of Safety Instrumented Functions and verification of SIL and MTTFS based on practical examples of safety functions in the process industry. Comparison of different designs and generation of reports. Most important parts of the Safety Instrumented System Life Cycle.

Who is it for?

Students, technicians, designers, system integrators and engineers related to Functional Safety and Safety Instrumented Systems (SIS) of the process industry.

It is advisable to have certain knowledge of instrumentation and control.

Course Objetive

The objective is to acquire knowledge to understand and design Safety Instrumented Functions (SIF) from a totally practical point of view. For this, all the concepts on Functional Safety are reviewed, as well as the main parameters are explained in detail. Real examples are made with the SILcet tool that allows to calculate the SIL based on the three requirements of the IEC-61511/61508 Standard, as well as compare different design alternatives.

What to expect from the Course Understand what a SIF is and what concepts and parameters are the most influencing its design.

Learn how to design a SIF and calculate the SIL and MTTFS of real Safety Functions in the process industry.

Benefit from Lessons Learned and Best Practices acquired from Major Projects.

Methodology Course in English

Duration: 16 hours Methodology "learn by doing" with many practical examples. Note: Participants with PC can perform the exercises with the SILcet tool included in the course.

Documentation and Tools

Slides of the course modules and Video on Functional Safety.

Excel files (SILcet) with the actual calculations of the practical examples of the course.

License1 SILcet Pro Plus included (6 months).

SILcet User Manual and detailed document on the formulas for calculating PFDavg and MTTFS.

(1) One 6-month SILcet license per student (1 PC per license,

Windows and Excel 2010 or later required).

COURSE CONTENT (in-company)

http://safetyandsis.com/



Contents Module 1

-Concepts about SIS, SIF, SIL and the life cycle. International Standards Relationship between IEC-61508 and IEC-61511.

-Risk concepts and how to reduce them with the different layers of protection. Requirements and examples of the IPL.

-Interpretation of the principle of independence of the SIS according to IEC Standards. Examples

-Basic concepts about Process Hazards Analysis techniques. Qualitative method exercise for the determination of SIL.

-The Matrix “Cause-Effect”.

Module 2

-Detailed analysis of the SIF. Sensor, logic solver and actuator subsystems.

-Types of failures, practical examples in the 3 subsystems and their impact (safe, dangerous, detected & not detected, common cause, etc.)

-Transmitter: Configuration of faults (over range / under range). How to interpret the manufacturer's data rates

-Types of diagnostics (product and application) and real examples in the three subsystems (PVST, 4-20 mA signals, short circuit, line monitoring, use of the Hart, etc.)

-PLC: "fail-safe" versus standard.

-Most used architectures and examples.

-Principles of design of safe systems. "Fail Close" and "Fail Open" valve cases.

Module 3

-Requirements of IEC 61508/61511 Standards to design the SIF and calculate the SIL. Examples.

-The 9 key parameters in detail to calculate PFDavg and MTTFS. The sources of data. How to calculate the beta factor.

-Equations to calculate PFDavg and MTTFS.

-How to improve SIL / RRF.

-Simple examples.

Module 4 (SILcet is used)

-Safety Requirements Specification (SRS). Assumptions for the examples (configuration of the transmitter according to the architecture, online / offline tests, etc.)

-Practical exercises using the SILcet tool:

1. Tank Level (several cases)

2. Vessel under pressure (several cases): i) undefined sensor type, ii) transmitter vs switch, iii) diversity of elements, iv) credit by comparison, v) bypass impact.

3. Calculate the SIL achieved by the Logic Solver.

-21 general considerations to design the SIS.

-Two Excel files are included: "SILcet without the exercises solved" and "SILcet with the exercises solved".


-Design considerations of the actuator subsystem. Partial Stroke Test. How to calculate the value of Cpt.

-Safety Requirements Specification (SRS). Assumptions for the examples.

-Real practical exercises using the SILcet tool (in each case there are several possible configurations):

1. Low combustion air flow in Incinerator or Furnace.

2. Stop of high pressure pumps by partial closure of the suction.

3. Gas valve closure due to flame loss.

4. Emergency depressurization in a reactor: action on several lines when the temperature is excessive (Reactor Bed Temperature).

5. How to solve a SIF with two Logic Solvers (Safety PLCs).

6. SIF with shared elements (Control System and SIS).





Module 6

-How to prepare a SIL Verification Report.

-Main document with MS-Word Template.

-Annex of parameters, graphs and results (PFDavg, PFH, MTTFS) generated by SILcet.

-Example of report with the exSILentia tool.


Note: Other additional exercises that are delivered resolved to the participants at the end of the course.

-Safety Requirements Specification (SRS). Assumptions for the exercises.

-Real practical exercises using the SILcet tool (in each case there are several possible configurations):

• Turbine Trip Valve Hydraulic System.

• High Integrity Pressure Protection System

• Pressure vessels (different cases).

• Others: Solutions with high availability, Fire & Gas System, Protection of a Silo.


Instructor

José Bielza. Master in Industrial Engineering with specialization in Electronics and Automation at the Polytechnic University of Madrid. More than 30 years of experience in the area of Instrumentation and Control in several multinational companies such as Foster Wheeler, Rockwell Automation and Siemens. Currently Technical Director of Enertria and member of the Commission of ISA-Spain.

He has designed and developed the tool “SILcet” for the SIL verification.

Many years dedicated to the training, engineering and design of Safety Instrumented Systems (SIS) for end customers such as BP-OIL, REPSOL, CEPSA, GAS NATURAL-U.F., ENDESA-ENEL, EDP, IBERDROLA, FORD, GENERAL MOTORS, BASF, SOLVAY, SAICA, C.F.E., AIR LIQUIDE, GE, TUPRAS, SAMIR, EXXON MOBIL, ENAGAS, etc.

The course includes the following tools in Excel for free:

SILcet 5.0 Pro Plus: SIL calculation Excel tool (6 months license) (Windows 7/8/10, Excel 2010/13/16/19/365)

Beta factor for the calculation of beta factors according to the methodology recommended by IEC-61508.

Calculator for “Proof Test Coverage” of actuator subsystem. Heat dissipation: Calculation of the heat dissipation in the PLC cabinet and calculation of the required ventilation.




Some diagrams, tables and graphs used in the course are shown below.








Documents

COURSE CONTENT (in-company) · -Example of report with the exSILentia tool. Module 7 (SILcet is used) Note: Other additional exercises that are delivered resolved to the participants