November 2000

Columns

HP Automation Safety: One size does not fit all!

When selecting safety integrity levels (SILs) many engineers like to take a one size fits all approach. This is very common when selecting SILs for fired heaters. Many times I've heard,..

Marsza, E. M., exida LLC

When selecting safety integrity levels (SILs) many engineers like to take a one size fits all approach. This is very common when selecting SILs for fired heaters. Many times I've heard, "We design our heaters for SIL 2." What does that mean? A typical heater can have from 6 to 20 safety functions depending on fuel types and combustion air arrangement. When some engineers say that their heaters are SIL 2 they are assigning SIL 2 to every safety function regardless of the actual hazard prevented by that function. This method is great for saving a nickel during design, but like most design time-saving shortcuts, it costs doll

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain IMMEDIATE ACCESS to the current issue as well as to 3 articles from the HP archives per month. $399 for an annual subscription.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain IMMEDIATE ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,695 for an annual subscription.  For information about group rates or multi-year terms, contact J'Nette Davis-Nichols at  jnette.davis-nichols@gulfpub.com or +1 713.520.4426.

Related Articles

From the Archive

Comments