Geo-Tech Industries has proven and perfected a new continuous submerged Arc Overlay Process with approved A.S.M.E registered procedures.
In-situ application of weld overlay to the internal surface can be used to:
Build up corroded areas to the original thickness or to increase the corrosion allowance;
Apply a corrosion-resistant material to the internal surface.
Weld Overlay is applied using a submerged arc procedure, utilizing two weld heads simultaneously. Components for this equipment are sized to pass through a 20" manway, after which they are assembled in the vessel. A Digester, (13'-3" diameter by 53'-11" high) was recently completed on Vancouver Island, however, there are no diameter or height limitations.
Third party inspection is engaged for continuous monitoring during the welding process. Metallurgical quality is verified by using a nuclear analyzer (Texas Instruments).