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Primatech Training Institute

S84  / IEC 61511 Standard on Safety Instrumented Systems (SIS) and the Development of a Safety Requirements Specification (SRS)

"If you are not practicing S84 be afraid, be very afraid."
-
Brian Powell, Praxair

Course Description

Safety instrumented systems (SISs) play a key role in process control to achieve safety and productivity. Their purpose is to take a process to a safe state when predetermined set points are exceeded. SISs are also called emergency shutdown systems, safety shutdown systems, and safety interlock systems.

Several standards have been enacted to address the reliability of SISs. ANSI/ISA S84.00.01-2004, Functional Safety: Safety Instrumented Systems for the Process Industry Sector, first issued in 1996, has now been harmonized with IEC 61511 issued in 2003. In March 2000, OSHA issued a letter, reaffirmed in November, 2005, stating that the S84 standard is considered "good engineering practice" for safety instrumented system design. This effectively makes the S84 standard part of process safety management (PSM) since paragraph (d)(3)(ii) of the OSHA PSM standard specifies: "The employer shall document that equipment complies with recognized and generally accepted good engineering practices".

S84 / IEC 61511 identifies three Safety Integrity Levels (SILs) for the process industries and specifies performance requirements for each level. Different levels of risk require different levels of safety system performance.

This course teaches the important concepts and terms needed to understand the S84 / IEC 61511 standard and it describes its requirements and its relationship to PSM. The detailed requirements for a Process Hazard and Risk Assessment (PHRA) and the allocation of safety functions to protection layers are discussed. A key requirement of S84 / IEC 61511 is the development of a Safety Requirements Specification (SRS). The course explains how to prepare the SRS and attendees develop a SRS in a workshop session.

A detailed manual is provided for use as a reference after you have completed the course. Also provided is a Microsoft Word template for preparing the SRS.

Objective

Understand the overall requirements of the S84 / IEC 61511 standard for SIS. Understand the requirements for a PHRA and the allocation of safety functions and how they relate to PHA. Be able to prepare a SRS for each SIS.

Target Audience

Process safety personnel, control and instrumentation engineers, project engineers and others who need to apply the S84 / IEC 61511 standard.

Prerequisite

Experience in process safety is helpful.

Course Contents

  • SIS concepts and terms

  • Standards and regulations applicable to SIS

  • PHRA and the allocation of safety functions

  • Preparation of a Safety Requirements Specification (SRS)

Duration / CEUs / ABIH

  • One day

  • 0.7 CEUs awarded

  • 1.17 CM Points, ABIH Approval #: 10-144

Tuition

See Information on Pricing and Registration - USA for pricing and registration information.

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For more information, please contact our Manager of Training Services at 614-841-9800 or via email at training@primatech.com.

Training Discount Offers

Attend both of these courses in the same week for a total cost of $1,600 (savings of $390). Normal price would be $995 per course or $1,990. For more information and additional training discount offers, see Information on Pricing and Registration - USA and Training/Software Promotions.

Upcoming Training Courses (By Month)

June

July

Training Courses (By Title)

Process Hazard Analysis (PHA) for Team Leaders

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Process Hazard Analysis (PHA) Training Courses

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S84 / IEC 61511, Layers of Protection Analysis (LOPA) and Safety Integrity Level (SIL) Courses

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Software Courses

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Job Safety Analysis / Procedure Writing Courses

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Management of Change (MOC) and Mechanical Integrity (MI) Courses

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Cyber Security Courses

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Human Factors and Human Errors Courses

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Courses Offered for In-House Delivery Only

Process Hazard Analysis (PHA) Training

Risk Management Program (RMP) Training

Process Security Training

Other Technical Training

Courses delivered in-house can be customized to include your specific process examples and drawings. For more information about training courses, contact us at training@primatech.com, by fax at 1-614-841-9805 (any time), or call us at 1-614-841-9800. You can also click on any of the above links for additional information.

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