of production, logic solvers are designed with
redundancy and voting logic. Should a single logic
solver channel fail, an alarm will be generated on the
human machine interface (HMI).
Certification
With regard to the certification, and to be in
accordance with IEC61508/11 and meet the SIL 3
requirements, the complete system must comply with
both the requirements and constraints. Paladon will
provide this with third party certification. Electrical
certification will be Exd 11C T6 ATEX and IECEX.
Reducing the cost of HIPPS
procurement
The traditional procurement cycle of HIPPS has
required end users and engineering, procurement and
construction (EPC) companies to source components
from multiple suppliers and then internally conduct
the safety analysis on the complete system to ensure
compliance and certification up to SIL 3. As shown in
Figure 2, the project management of numerous vendors
can be a complex and time consuming process for
procurement departments, and the SIL 3 calculations
and certification activities require end user or EPC
resources from multiple
engineering disciplines. In
an effort to save costs and
improve budget
management, over the last
20 year or so, most end
users and EPC companies
began to subcontract many
of the procurement and
engineering activities
traditionally conducted
internally. This trend
towards outsourcing has
increased demand for
suppliers to provide turnkey
solutions for many types of
systems, including HIPPS.
Figure 3 illustrates just
how much more time and
cost efficient the process is
for end users and EPC
companies procuring
turnkey HIPPS when
compared to the traditional
procurement cycle.
Conclusion
End user economic and
environmental concerns are
rapidly driving the increased
adoption of HIPPS as the
solution of choice for many
critical over pressure
protection applications.
Traditionally the
procurement of HIPPS has
been a very expensive and
time consuming process;
however, with several
companies now being able
to offer a single point of
contact for the supply of
turnkey HIPPS, it has never
been easier for end users to
enjoy the economic,
operational and
environmental benefits that
they provide.
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