There are two main drivers for partial stroking of valves in safety systems: the desire to extend manual test intervals to as long as possible; and to reduce the amount of redundant hardware required for higher safety integrity levels. Like most things in life, it all boils down to one thing: trying to save money.
Understanding the purpose of control and safety systems helps users ensure each is appropriately optimized. The duties of the SIS are to protect the people, environment and assets against unsafe conditions.
Author: Angela Summers, PhD, PE, founder of SIS-TECH Solutions
You may not be aware, but a new bus war is being waged in your plant the battle of the motion networks. Control Global's Senior Tech Editor Dan Hebert, PE, provides analysis and commentary on the newest battle over fieldbus.
Industry faces the threat of draconian demands from Congress as chemical plants remain an attractive targets for terrorism attacks, according to Mark Rosenzweig, editor in chief of Chemical Processing.
The proper hand protection plays a tremendous role in keeping plant workers safe. This article answers questions often posed by workers and managers about hand protection products, their applications and limitations.
British Petroleum's tragic March 2005 explosion has been well-documented through the press. Read here to find out how that tragedy spurred the development of a new program addressing management issues at BP.
Author: Foster Finley and Karl Roberts, AlixPartners