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INNOVATIVE TECHNOLOGY

Reduce costs while achieving the required
level of security

DCS Cabinet

According to EXIDA statistics [4], the distribution
of safety circuits (SIF) by SIL levels in the petrochemical
industry is as follows:
SIL0 - 8%; SIL1 - 51%; SIL2 - 32%; SIL3 - 8%;
SIL4 - 1%.
At the stage of hazard analysis and operability Cabinet GROOVE
(HAZOP) with subsequent ranking of risks by SIL
levels, all possibilities for the use of mechanical
protective equipment (safety valves, bursting
valves) should be considered membranes, etc.) in
order to reduce the number of circuits of the EAP
system with a high level of SIL. The implementation
of SIL4 may require a change in the technological
part of the project, since its achievement by means
of the EAP system is a costly and technically difficult
task.
Completing the SIL3 level is typically three
times more expensive than SIL1. Application
of Partial Stroke Testing (PST) technology can
reduce the difference by up to two times, since
the main cost of the circuit is shut-off equipment.
SIL-oriented approach to the implementation of
protection circuits from the sensor to the actuator allows you to:
● eliminate the formal approach of signal distribution between DCS and EAP, thereby reducing
the number of DCS and EAP cabinets;
● focus on security;
● get quantitative estimates (SIL) of the elements of the EAP system;
● reduce the cost of the process control system design.

P.N. Kiryushin, expert on emergency response systems
Emerson automatic protection.

References:
1. Fedorov Yu.N. Process Control Engineer Handbook: Design and Development. Moscow. Infraengineering, 2008.
2. Itskovich E.L. Necessary properties of emergency protection systems for industrial facilities // Automation in industry.
2016. No. 2.

24 Stanochniy park