Industrial Fabrication: AOD Vessel Repair

A local specialty steel mill that makes stainless steel contracted with The Rose Corporation to repair an AOD vessel. We originally manufactured this 50,000-lb. vessel in 1998, along with two other identical vessels. After years of using it under extreme heat conditions, the center of the main body bulged out of round by as much as 3-inches, making it impossible to fit into the trunnion ring that supports it.

What is an AOD Vessel?

AOD (Argon oxygen decarburization) is a process primarily used in stainless steel making and other high-grade alloys with oxidizable elements such as chromium and aluminum. After initial melting, the metal is then transferred to an AOD vessel where it will be subjected to three steps of refining; decarburization, reduction, and desulphurization. An AOD vessel allows for the introduction of oxygen and inert gas (argon or nitrogen) below the surface of molten metal.

The Rose Corporation was contracted to replace the center cylinder section, which is made of 1-1/2” thick steel.  The project was extremely time sensitive — the AOD vessel had to be repaired, stress-relieved, tested and delivered in five weeks. After the success of the repair project, The Rose Corporation has been contracted to build a new AOD vessel identical to the one that we repaired.

The photos below show the vessel as it was received, while in our facility under repair and then loaded back on the trailer for shipping back to the customer.

Receiving Damaged AOD Vessel
Receiving the damaged AOD Vessel at The Rose Corporation, Reading, PA
in shop
The AOD Vessel being repaired at The Rose Corporation
Repaired AOD Vessel by The Rose Corporation ready for delivery
Shipping the repaired AOD Vessel at The Rose Corporation, Reading, PA

The Rose Corporation is an industrial fabricator and contract manufacturer located in Eastern Pennsylvania that specializes in the Industrial Fabrication of custom-engineered equipment and contract manufacturing complex, large-scale industrial components and equipment including material handling systems, industrial furnaces, power generation equipment, air pollution control equipment, thermal oxidizers and more.  The Rose Corporation has over 150,000 square feet of under-crane manufacturing space, 18-feet x 18-feet overhead doors, and an overhead crane capacity of up to 80 tons. The TRC Field Services Division offers a wide range of services including repair, millwright services, on-site welding, fabrication, painting, and installation.