Are integrated SIS/DCS systems better than standalone SIS DCS systems?

Lately, there have been many launches of new “integrated” control systems, that have both DCS and SIS systems in the same package. For those of you are not familiar with these terms, an SIS is short for “Safety Instrumented System“, which is a special kind of control system that is used for the safety critical … Read more

Cost of NOT preventing corrosion in a gas pipeline – $ 4 billion!

On June 3, 2008, there was a large explosion in a natural gas processing station on Varanus island near Western Australia. The investigation report that was released last week, points to poor maintenance as being the leading cause of the accident. It seems that the company that maintained the pipeline and associated infrastructure neglected maintenance … Read more

Can using Gas detectors simplify hazardous area classification?

Is it possible that if we use gas detectors to continuosly monitor the explosive limits in a classified (hazardous) location, we could manage it better? Of course! If you recall, the area classification concept itself is based on the amount of time in a year, an explosive gas mixture (or a combustible dust-air mixture) is … Read more

Gas Detector calibration & testing-ideal frequency

In a typical large chemical manufacturing plant or facility, typically there may be hundreds of gas detectors and gas monitors that warn operators about lurking hazards related to leaking chemicals and vapors. These detectors are installed during the plant startup or possibly are added after a few incidents or as the result of HAZOP or … Read more