Inspection Division On-Stream Inspection Services On-stream inspection is performed on equipment while it is in service to establish its suitability for continued operation. Cornerstone has certified personnel that provides services that can assist with all code compliance inspections. Request Info about On-Stream Inspection Our Inspection Division services a variety of industries. Select your industry below for more information. Refining Chemical Power Terminals & Pipelines Offshore Pulp & Paper Civil Engineering Marine Aerospace & Defense Get In Touch Request Information NDT/InspectionThermal