Integrated Safety and Process Controls for the Speciality Chemicals Sector

Related Vendors

DÜPERTHAL Sicherheitstechnik GmbH & Co. KG

Italvacuum, Srl

TRM Filter d.o.o.

Rockwell Media

Safety and Control Systems

Specialty chemical manufacturers employ many types of control systems that continuously manage parameters, such as temperature, flow, pressure, weight and viscosity. Plants need to keep some processes going for practical and financial reasons...

Some common types of safety systems include emergency shutdown, fire and gas monitoring, critical process control, burner management, and turbo machinery control.

Stay in Control: How to Tackle Safety Issues

Since the goal is to maintain process control, maximum availability is a core requirement of safety instrumented systems. High availability from a process controls perspective simply means the control system will be available to perform its function regardless of changing conditions or operational malfunctions. The system is designed to tolerate failures and allow changes, repairs and replacements without significantly affecting the mission. The designer must accept the fact that components and systems might fail, and hence, design the application around this assumption.

Triple Modular Redundant (TMR) technology is often employed to achieve the highest level of fault tolerance and safety. These systems are designed with three parallel systems running in a redundant design. All three systems process the input information and vote to affect a result. That is, a two-out-of-three vote is required to effect a change or stop a process.

Safety Control Challenges

Critical devices, such as exhaust fans, pumps, valves and motors, must remain on if the Basic Process Control System (BPCS) fails. Since processes can create hazardous situations when they are out of control, the BPCS may not be able to keep the process under control in the event of a failure. This is where the Safety Instrumented System (SIS) comes into play...

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