Process Safety Isn't Automatic

Process Safety Isn't Automatic

Automation can help, but isn't foolproof.

Several disastrous incidents over the past few years within the process industry have reinforced the importance of proper safety procedures. One factor to consider in the safety equation is automation. The technology has been around for years, and manufacturers are finding ways to increase the value of their safety systems by deploying intelligent, integrated solutions. Process manufacturers are beginning to utilize integrated safety and control systems to streamline data.

"Traditionally they were diverse and separate technology, and the big trend in the industry today is [knowing] why my safety system did this or how do I get all the information I need in one place. And to do that you have to have integration between the process control and the process safety system," says Art Pietrzyk, process safety product manager, Rockwell Automation Inc.

In recent years, automation companies have purchased safety solution providers to begin integrating the two technologies, as evidenced by the Rockwell acquisition of ICS Triplex in May 2007, notes Asish Ghosh, vice president of ARC Advisory Group. And two years ago Emerson Process Management released a safety system that interfaces with its control system.

New Zealand's Austral Pacific Energy Ltd. utilizes an integrated control system that also manages the company's safety system.
Integrating the control and safety systems can help operators assess hazardous conditions more intelligently and get production back on line more quickly, according to an ARC report on a Siemens process safety system. One integrated system also helps reduce engineering and maintenance costs inherent with two disparate controllers, the ARC report concludes.

Bringing the two systems together will have little impact on overall plant safety, though. That responsibility primarily rests with the plant personnel. "It's not just putting the safety systems in place, but it's also following the proper procedures," Ghosh says. "Safety systems are there, but human error is [typically] the cause of the problem, so the big push now is for a greater safety culture."

On The Hot Seat

"If OSHA had acted and if the industry itself had paid more attention possibly this incident would not have happened. It should not have happened. These people should not have been killed."

-- Carolyn Merritt, former head of the U.S. Chemical Safety Board, speaking on "60 Minutes" about the Imperial Sugar Refinery fire near Savannah, Ga.

Pietrzyk agrees that automation systems can only do so much to prevent disasters, such as BP's Texas City refinery fire in 2005 and the Imperial Sugar refinery explosion in Georgia in February 2008. "First off, the problem with all of those, including the historic ones, has never been technology, so is there a technology that overcomes stupidity? I don't know," Pietrzyk says. "What will overcome some of the problems is re-analysis of a safety situation by periodically testing to make sure things are still working -- and part of that lifecycle is the human element."

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