IEC 61508/11 Functional Safety
The introduction and implementation of the international safety standard IEC 61508 and the technical sector variants such as IEC 61511 for the Process Industries, is currently setting a global benchmark as ‘best practice’ in the provision of functional safety methodologies, equipment systems and safety management frameworks for all industries.
The generic IEC 61508 standard is unique in many respects in that it:- Caters to all industry sectors
- Creates a common platform for developing functional safety on all organisations currently operating within the supply-chain
- Provides guidance on technologies, methodologies and best practice approaches which can be utilised throughout the typical cradle to grave project lifecycle
- Provides a focus for regulatory authorities
- Provides a phased implementation for the development and realisation of safe processes, equipment and management / design methodologies
In addressing the requirements of the standard, Chilworth seek to assist our clients to understand and implement the execution of the required front end safety lifecycle phases for the generation of the required safety case through a cost effective delivery process. Through best practice and consistent IEC 61508 HAZOP & SIL determination products and services, Chilworth can provide project safety life cycle consultancy support for direct compliance to IEC 61508/11.
Useful Links:
For further information on Functional Safety visit
http://www.iec.ch/zone/fsafety/fsafety_entry.htm
Frequently Ask Questions on IEC 61508 visit
http://www.iec.ch/zone/fsafety/questions.htm
Publications
 | IEC 61508/11 & COMAH Safety Management
For high hazard sites, the Safety Instrumented System (SIS) is seen as a crucial layer to risk reduction and an important element of the Basis of Safety. Justification of the link between the major accident hazard and the risk reduction afforded by the Safety Integrity Level (SIL) of the intended system is an industry concern.
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|  | IEC 61508/11 Functional Safety
If you rely on an electrical, electronic or programmable electronic system for the safety of any part of your processing operation, there is a need to verify and demonstrate the performance and integrity of the system. IEC 61508 is a generic standard on which specific industry sector safety related standards are to be based. For the process sector IEC 61511 is in preparation and like IEC 61508 outlines a preferred lifecycle for any Safety Instrumented Systems. Its international adoption provides an accepted benchmark for determining the Safety Integrity Level, design requirements and test intervals for Safety Instrumented Systems.
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|  | IEC 61508/11 SIL Determination
In many applications dedicated instrumented trip and alarm systems are essential for plant safety. In order that we can identify a suitable Basis of Safety for a plant the functionality and reliability requirements of such instrumented safety systems need to be determined and recorded. This can be done most effectively by using the safety lifecycle strategy described within IEC 61508/11.
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