Functional Safety

SAFE, SECURE & COMPLIANT SOLUTIONS

FUNCTIONAL SAFETY WITH TRIPLE I

At Triple i, our Engineering and Technology team has extensive experience with Functional Safety and Safety Systems across a diverse range of projects and industries.

Our personnel hold qualifications in Functional Safety Engineering, including TÜV Functional Safety Engineer (TÜV Rheinland) allowing us to engage in various stages of the functional safety design, maintenance, and operations lifecycle.

Using the hazard identification and risk assessment tools at the core of our business (i.e., HAZOP/CHAZOP), we can facilitate the early stages of risk assessment and identification of SIF’s (Safety Instrumented Functions) in your process and functional safety design. Our team has experience in the practical application of the following tools across a range of industries:

  • Layer of Protection Analysis (LOPA)
  • Hazard and Operability Study (HAZOP)
  • SIF Identification & Safety Integrity Level (SIL) Determination
  • System and Safety Requirements
  • Specification (SRS/SSRS) (including software applications)
  • Safety Dossier Development
  • Safety Software Design & Integration
  • Maintenance and Operation
  • Functional Safety Management
  • SIL Verification
  • Functional Safety Audit

We ensure your system complies with industry standards including:

  • IEC61508 – Functional safety of electrical/electronic/programmable electronic safety-related systems
  • IEC61511 – Functional safety – Safety instrumented systems for the process industry sector

We can also provide audit and SIL verification services to ensure your system provides the risk reduction and compliance you need.

For more information about any of our Functional Safety services or to find out more about our alternate technical safety and risk management services, please contact us.

What is Functional Safety?

Comply with Standards, Reduce Risk & Optimize Production

At its simplest a functional safety system detects abnormal operation of a system and automatically places or maintains a process in a safe state.

Functional safety is the part of the overall safety of a system or piece of equipment that requires automatic detection of a fault and prevention to occur an unsafe event. Typically, this is achieved through a Safety Instrumented System (SIS). A SIS is designed to handle likely human errors, systematic errors, hardware failures, and operational or environmental stress to ensure it operates as expected when demanded.

THE PROCESS OF FUNCTIONAL  SAFETY

ACHIEVING FUNCTIONAL SAFETY

Functional safety is achieved when every specified safety function is carried out and the level of performance required of each safety function is met. This is normally achieved by a process that includes:

STEP 1 - RISK OR HAZARD ASSESSMENT

Identifying what the required safety functions are. This means the hazards and safety functions must be known. A process of function reviews, formal Hazard Identifications (HAZIDs), HAZOPs and accident reviews are applied to identify these.

STEP 2 - SAFETY SYSTEM FUNCTION REQUIREMENTS

Assessment of the risk-reduction required by the safety function, which will involve a SIL or performance level or other quantification assessment. A SIL applies to an end-to-end safety function of the safety-related system, not just to a component or a part of the system.

STEP 3 - SAFETY SYSTEM DESIGN & VERIFICATION

Identifying what the required safety functions are. This means the hazards and safety functions must be known. A process of function reviews, formal Hazard Identifications (HAZIDs), HAZOPs and accident reviews are applied to identify these.

STEP 4 - SAFETY SYSTEM INSTALLATION & VALIDATION

Verification that the system meets the assigned SIL by determining the probability of dangerous failure, checking minimum levels of redundancy, and reviewing Systematic Capability (SC). Failure modes of a device are typically determined by Failure Mode and Effects Analysis of the system (FMEA) – often provided on the equipment manufacturer datasheets. Failure probabilities for each failure mode are typically determined using Failure Mode, Effects, and Diagnostic Analysis (FMEDA).

STEP 5 - MAINTAIN & IMPROVE SAFETY SYSTEM

Conduct functional safety audits to examine and assess the evidence that the appropriate safety lifecycle management techniques were applied consistently and thoroughly in the relevant lifecycle stages of product.

Neither safety nor functional safety can be determined without considering the system as a whole and the environment with which it interacts. Functional safety is inherently end-to-end in scope. Modern systems often have software intensively commanding and controlling safety-critical functions. Therefore, software functionality and correct software behaviour must be part of the Functional safety engineering effort to ensure acceptable safety risk at the system level.

Get Started

To learn more about Functional Safety with Triple i and our alternate technical safety and risk management services contact us today!  

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