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Selection
and design of safety systems is not trivial, and it never has been.
Operating companies in the process industries must
face compliance with new safety standards such as IEC61508 and IEC61511,
while implementing safeguards that provide asset protection, all without
disrupting asset utilization or compromising production targets. What
are the fundamental selection criteria for safety and critical control
equipment? What key principles must be clarified in order to ensure successful
selection and implementation of the system?
By learning the 10 truths of safety instrumented
systems (SISs), you can improve your ability to engineer a system that
complies with IEC and ANSI/ISA standards, increases uptime, and ensures
optimal asset utilization.
Truths 1-3 are highlighted below. Click on the
underlined topics for more information. Control
Engineering will send you Truths 4-6 in July, and Truths 7-10 in
September. Or, view
all 10 Truths to ensure the success of your safety
systems today.
Truth
1
SIL
is a measure of safety, but has no impact on plant uptime.
SIL rating is a measure of the risk reduction capability and probability
of failure-on-demand. It measures only the 'Fail Safe' nature
of the device, and should not be the primary or sole measurement considered
when selecting a safety system.
Truth
2
Quality
of an SIS has a direct impact on plant performance.
Quality isn't always implemented the same way by every company. Quality
Assurance procedures differ between vendors, regardless of product compliance
with safety standards and certifications. Nevertheless, a vendor must
make sure that their SIS performs to the intended specification. Receive
a FREE DVD “An Inside look at Triconex
processes.”
Truth
3
Many
companies will sell you a safety system, but few are able to address your
specific needs. Operating companies in the process
industries that are pursuing regulatory compliance represent tremendous
potential for any manufacturer that offers some form of process control
technology or automation. Many such manufacturers are scrambling to ensure
their products offer some level of compliance for use in safety applications.
Unfortunately, while most of these 'new' products offer solutions
for the fail safe side, only a few of them can address the need for safety
and process uptime simultaneously.
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