Studding


Tube wall covered with chromium enhanced studs


Close-up of above


Typical in-house studding operation


Chromized studded wall panel - smelt spout opening


Close-up of chromized studs


Typical wear pattern after 2 to 3 years of operation
(note conical shape of studs)


Typical restudded wall - chromized studs


Chrome Seal Studs after 5 years exposure (note that studs are still cylindrical
)

ATC invented and is the sole supplier of chromium-enhanced studs. The process involves the diffusion controlled enrichment of component surfaces with chromium to impart superior levels of corrosion and/or erosion resistance. ATC pioneered the development of the process for use in both the Pulp and Paper and Utility industries. The Chrome Seal "R" Stud has been installed in a number of Chemical Recovery Boilers in the U.S. and Canada.

Because all of the chromium-enhanced studs which have been installed to date have been produced by ATC, ATC is willing to honor the warranty on any chromium-enhanced studs installed by another vendor. Confident that the quality of the studs produced using ATC's Chrome-Seal process is superior to anything that can be offered by other vendors, ATC is willing to offer a Five Year Warranty on Chrome-Seal stud performance.

In addition to the original chromium-enhanced stud which has found wide application in many recovery boilers, ATC has developed a new and more versatile stud that offers protection from both corrosion and erosion. This is the Chrome-Seal "C" Stud.

ATC's Chrome-Seal studs have been installed and are performing successfully in the following chemical recovery boilers.

-Appleton Paper
-Boise Cascade
-Bowater-3 units
-Crown Vantage
-Georgia Pacific-2 units

-International Paper-3 units
-Interstate Paper
-ITT Rayonier
-Smurfit Stone Container Corp.
-Pope & Talbot
-Simpson Paper
-Skeena Celulose, Prince Rupert, B.C.
-Stone Container-3 units
- Weyerhaeuser
-Willamette Industries
-Fort James Corp.