Does Your Existing SIS Get the Job Done?

An installed system now requires a formal determination of adequacy

Does Your Existing SIS Get the Job Done mn

Grandfathering of safety instrumented systems (SISs) is no longer limited to the U.S. standard. ISA has accepted the 2nd edition of IEC 61511, “Functional Safety — Safety Instrumented Systems for the Process Industry Sector,” as the replacement for the current U.S. national standard, ANSI/ISA 84.00.01-2004. Unlike the previous edition, the latest U.S. and international versions don’t differ at all. This is good news for the process industry sector, which sources so many products and services internationally.However, many U.S. processors may worry about what happened to the previous edition’s “grandfather clause” or ANSI/ISA 84.00.01-1 clause 1y:“For…

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  • Does Your Existing SIS Get the Job Done?

    By Angela E. Summers, SIS-TECH Solutions

    Grandfathering of safety instrumented systems (SISs) is no longer limited to the U.S. standard. ISA has accepted the 2nd edition of IEC 61511, “Functional Safety — Safety Instrumented Systems for the Process Industry Sector,” as the replacement for the current U.S. national standard, ANSI/ISA…

    Full Story
  • Canadian Refinery Recycles All Its Wastewater

    By John Elliott, SUEZ Water Technologies & Solutions

    Federated Co-operatives Limited’s Co-op Refinery Complex (CRC) in Regina, Sask., is one of Canada’s largest and most productive refineries. The complex originally was established in the 1930s by a group of eight farmers as a more economical way to supply fuel to a small chain of Saskatchewan…

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  • Dirty CMMS Data Thwarts Efforts

    By Steve Cyr, Emerson

    Organizational data has become an essential tool for industrial manufacturers that want to remain productive and profitable. New applications coming to organizations offer the ability to leverage critical plant data interconnected with cloud-based technologies for process improvement, greater…

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  • Deter Difficulties with Instrument Air Dryers

    By Ron Marshall, Marshall Compressed Air Consulting

    Instrument air dryers are a necessary part of the compressed air system in a typical chemical plant. These devices and their associated filters remove water and lubricant from the compressed air that goes to sensitive instrumentation and control actuators. Such dryers act to pull down the dew point…

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  • Consider Open-Rack Seawater Heat Exchangers

    By Amin Almasi, mechanical consultant

    Heat exchangers that use seawater are common worldwide because they provide a compelling benefit — seawater is a free heat-transfer medium that doesn’t produce emissions. The units exchange heat between a process fluid (cryogenic or hot) and seawater of ambient temperature. In warm sea…

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  • Powder Handling: Develop Drying Curves

    By Tom Blackwood, Contributing Editor

    When faced with a drying problem at a plant, the first thing I ask for is a drying curve. Often, people will look at me as if I have three heads —sometimes grumbling: “Why do we need that? We know that drying the material completely takes twenty minutes.” A drying curve can serve several…

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