Viking Vessel offers advanced welding, tanks & vessels, fabrication, process & power piping and plant maintenance to the Power, Petrochemical, Refining and General Process Industrial markets. Viking Vessel Services has developed and engineered our patent-pending Tuff Tube product line that forever eliminates open-root butt welds in HRSG and boiler tube repairs and welding. Our Tuff Tube Transition (TTT) is a new technology product that provides a far superior tube-to-header connection, while significantly reducing downtime. Our Tuff Tube Purgeless Sleeve (TTPS) eliminates butt welds, purging and RT in tube-to-tube connections. Check us out! www.tufftubetransition.com