C&I has a long track record of implementing safety instrumented systems (SIS) for various petroleum refineries. These systems have been designed to attain a safe environment by performing specified functions when unacceptable or dangerous process conditions are identified. 

Following are several recent C&I SIS projects: 

SIS FCCU Upgrade

SIS Crude Unit Compliance

SIS PENEX Upgrade

SIS Platformer Upgrade

SIS CO Boiler Compliance Upgrade

SIS Sulfur Recovery Unit Compliance