| Goble, W., exida LLC, Sellersville, Pennsylvania
[safety instrument systems]
[safety integrity level]
Many reliability engineers trained before
IEC 61508 know the acronym MTTR as mean time to
repair. I certainly learned that definition. Naturally, I
think of the time it takes to repair something.
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Engineers and designers are highly skilled individuals. Forcing them to enter design changes using tables, forms and spreadsheets is unproductive and uneconomical, and it increases the likelihood of human error—this is the way that most instrumentation software systems currently work. For too long, software vendors have denied engineers and designers the simple practicality of a graphical visual engineering interface with “drag and drop” capability and inbuilt intelligence, ensuring changes are automatically replicated into all the associated data and databases.
D. GIBSON, AVEVA
As low oil prices make naphtha cracking margins in Europe and Asia more competitive, are investments in new, ethane-based petrochemicals capacity in the US and Middle East becoming less attractive?
Yes, ethane cracking is less economical
No, ethane cracking is still the future
Too early to tell