[h=1]Guidelines for Safe and Reliable Instrumented Protective Systems [Hardcover][/h] Center for Chemical Process Safety (CCPS)
http://www.amazon.com/Guidelines-Reliable-Instrumented-Protective-Systems/dp/0471979406
Safety Integrity Level Selection:
Systematic Methods Including Layer of Protection Analysis
By:Edward M. Marszal, Eric William Scharpf
http://books.google.com/books?id=4X...1&output=html&source=gbs_similarbooks_r&cad=2
http://www.amazon.com/Guidelines-Reliable-Instrumented-Protective-Systems/dp/0471979406
Safety Integrity Level Selection:
Systematic Methods Including Layer of Protection Analysis
By:Edward M. Marszal, Eric William Scharpf
http://books.google.com/books?id=4X...1&output=html&source=gbs_similarbooks_r&cad=2