Safety in the Plant
SIL-level identified for critical pressure safety devices
S
afety Integrity Level (SIL) is defined as a relative level of risk-reduction provided by a safety function, or to specify a target level of risk reduction. In simple terms, SIL is a
measurement of performance required for a Safety Instrumented Function (SIF). Fike Europe’s range of Fike bursting discs (also known as rupture
discs) has an assigned equivalent SIL-level 3. The SIL 3 has been derived from comparison with published and generally accepted probability of failure on demand (PFD) values assigned to passive mechanical pressure safety devices such as pressure relief valves and safety valves. The paramount SIL-rating assigned for Fike bursting discs is in line with the generally determined failure rate, and exceeds the assigned reliability rate of safety valves as the number of critical components required for pressure/safety relief valves are in excess of the tenfold then those used for bursting discs. This new and important
information will assist in the general requirements from the global industries to fulfil the increasing need to quantify the reliability of safety systems used for high-risk installations, using generally recognised models for risk assessment and risk reduction. n
Enter 39A or ✔ at
www.engineerlive.com/epe Fike Europe Bvba is based in Herentals, Belgium.
www.fike.be
Dresser Roots is a global leader in the design and manufacture of air and gas handling solutions. Our extensive range of Positive Displacement and Centrifugal Compressors can satisfy individual flows ranging from 3 M3/hr to 430,000 M3/hr.
Uncompromised weighing in Zone 1/21 & Division 1 Hazardous Areas
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electing weighing equipment certified for Zone 1/21 or Division 1 has typically required trading-off performance (accuracy, speed and functionality) for compliance with
hazardous area requirements. This situation inspired the development of a new family of weighing terminals that offer the same functionality and capabilities regardless of the hazardous area classification. The development focused not only on manual operations, but
also semi-automatic and automatic weighing processes that call for a large and vibrant display, ergonomic operator keys, and the ability to customize operator prompts and weighing routines. Also critical in a process environment is fast processing of data for transfer to a higher level system or for direct control of peripherals. This not only translates into accuracy and repeatability, but also flexibility with the possibility to program and configure boundless applications. Finally, the installation of cabling from and to the dangerous zone is very complex and costly; often limiting what can be achieved with the process. During the development, solid state, active I/O was a priority. Active I/O permits direct control of peripherals fully within the hazardous area. n
Enter 39B or ✔ at
www.engineerlive.com/epe
Mettler Toledo AG is based in Nänikon, Switzerland.
www.mt.com/ind560x
www.dresserroots.com © 2010 Dresser, Inc. All rights reserved. Circle 39 or ✔ at
www.engineerlive.com/epe
Our industry leading PD Blowers and High Efficiency Centrifugal Compressors are employed worldwide in a variety of applications including:
Petrochemical Processing Flue Gas Desulfurization Power Generation Vapour Compression Effluent Treatment Metal Refining
Positive Displacement Roots Blowers/Exhausters
Single Stage Centrifugal Compressors
Horizontally Split Multi-Stage Compressors
Vacuum Pump Sets and High Vacuum Boosters
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