HRI has extensive experience servicing all areas within an oil refinery. We inspect, maintain, replace and repair units under extreme, and complete the job safely every time.

Fluid Catalytic Cracking Unit

The cat cracker is the heart of a refining facility. When flue gas lines running from the FCCU crack or rupture, they can blow catalyst out at temperatures in excess of 1,100 to 1,400 degrees, normally a cause for shutting the unit down for repairs. Our clients save millions of dollars because we prevent them from needing to bring down their units for unscheduled repairs.

With our heat-safe technology, HRI technicians can perform inspections, including NDT ultrasound testing, on lines and vessel walls and make unit repairs while the cat cracker remains operational. We have developed repair procedures that maintain the integrity of the parent material, and will design and implement the detailed repair plan that works best with your material.


We can install and remove blinds pre- and post-turnaround to reduce the amount of time needed for unit repairs and to improve the critical path for repairs. After turnarounds, when all equipment is back online and reheated, HRI can hydraulically torque flange studs if needed.

The extreme temperatures of gases running through pipes and flue gas lines to and from units such as CO boilers or PRTs can make repairs to a singular unit problematic. When gas lines don’t have shutoff features independent of the unit needing repair, HRI provides a cost-efficient alternative to shutting the unit completely down.

HRI technicians can isolate hot equipment while it is still operating by installing blinds in connecting lines. While the unit is running, HRI can cut apart the line, insert a blind, weld a flange onto the line (if needed), bolt the line back together, and then make regular online repairs to the adjoining unit. After unit repairs are complete, HRI can remove the blind. HRI has inserted and removed blinds in a variety of settings, from lines as small as 4 inches to 10-foot diameter lines with 1,000-degree materials flowing through them.

Fin Fans

When bearings become faulty, blades fall off, or other problems arise with fin fans, cooling efficiency decreases significantly. HRI technicians routinely remove fin fans and replace or repair them online, on location, in 200 to 500 degree temperature settings. HRI also performs routine maintenance and inspections on fin fans to mitigate possible problems in the future.

Skin Casings

Crude oil heaters, boilers, furnaces and similar units can develop holes or cracks in their exterior, resulting in noxious and high-temperature gases such as CO, sulfur, and H2S being emitted. This poses a considerable safety risk to workers in the immediate area. HRI technicians can repair external ruptures on these units while they are in full operation, so your workers can reenter the area as quickly as possible and experience no drop in operation during the repair period.

Other Units

HRI has also provided service to these units at facilities across North America:

  • Catalyst lines
  • Waste heat coolers
  • Expansion joints
  • Heaters
  • Burner change-outs