Introduction to Tuff Tube Transition
An overview of Tuff Tube Transition, its products, and the problems its patented solutions are designed to solve.
Engineered & manufactured in Cisco, Texas, USA
TTT Technical Resources
Access Tuff Tube Transition product information, installation resources, technical literature and project information for TTT connection technology.
Video library
A sequenced view of the technology: product overview, shop fabrication, field execution and a real-time fit-up demonstration. Each video opens in place.
An overview of Tuff Tube Transition, its products, and the problems its patented solutions are designed to solve.
Shop fabrication of the Wise County headers as part of TTT's Header Integrity Program.
Field installation and replacement of the Wise County headers using TTT connection technology.
A real-time demonstration of the TTHC and TTPS preparation and fit-up process.
Technical resources
Tube-to-Header Connection
Recommended sequence for tube and header preparation, TTHC positioning, insertion and alignment verification, welding sequence and QC / VT hold points.
Tube-to-Tube Connection
Recommended sequence for tube preparation, TTPS positioning and fit-up verification, root welding, fillet / cap welding and QC / VT hold points.
Engineering support — available on request
Engineering drawings, dimensional drawings, calculations, Finite Element Analysis reports and project-specific engineering documentation are not publicly downloadable. Contact TTT so the appropriate information can be reviewed and supplied for the application.
Product literature

PDF · Rev. 8 · Current brochure
Overview of the TTT product family, applications and capabilities — TTHC tube-to-header connections, TTPS tube-to-tube connections and Tuff Plug, with installation context and field performance detail.
View / Download BrochureConventional vs TTT
Compare conventional welded repair with engineered TTT connection technology — including welding methodology, FEA, field evidence and comparative project economics.
Explore the comparisonCase studies

Header Integrity Program
Engineered replacement header built around the TTHC connection, fabricated, delivered and installed during the outage window.
Read case study
HP Economizer TTHC Installation
Following recurring HP economizer tube-to-header leaks, EDF Bouchain implemented TTT connection technology as part of its reliability strategy. Explore the project, installation photography, customer evidence and independent Combined Cycle Journal coverage.
View EDF Bouchain projectCustomer testimonials
Full written customer references from documented TTT projects.
Customer reference — reheat header replacement
Tyler Wensel, Maintenance Manager
“Following up from our Spring outage, I wanted to thank you and your team at Viking for engineering, constructing, and installing new reheat headers. I appreciate the attention to detail when it came to the Finite Element Analysis (FEA).
I was surprised to learn that the tube to header connection designed by Viking was 53% stronger than the OEM connection. We received proposals from competitors with conventional installation methods that averaged installation times for 6-8 weeks. The Viking team was able to install these headers in 5 days. Finding contractors that can complete work within our original outage window is paramount in the ERCOT market. I look forward to using Viking for additional repairs, and replacements in the future. To date we have over 150 starts, and a significant amount of baseload operation without a single failure since installation. We have conducted two inspections since installation, and there are no signs of premature failure, or unanticipated wear / stress.”
Customer reference — HP economizer TTHC installation
Guillaume Grognet, Maintenance Mechanical Manager
Bouchain, November 6th 2024
“Reference letter: Tuff Tube Transition solution by Viking Vessel.
As Bouchain CCGT Mechanical Manager, I am writing this letter to recommend services and TTT solution from Viking Vessel.
We are installing, with onsite Viking Vessel QA and QC support, 204 TTHC on a highly stressed HP economizer following several leaks occurring in operation last year. I can recommend Viking Vessel for their high level of commitment and professionalism in the design and on field services. They proposed to Bouchain power plant a solution tailored to the need in a very short time. Thanks to this solution, the life span of the exchanger is expected to be 8 times more, compared to the original design.”
Industry coverage
Tuff Tube Transition technology has been featured in Combined Cycle Journal through technical features, advertising and independent editorial coverage of real-world HRSG applications.
In the spotlight
Issue 75 (2023) · Page 27
Published by Combined Cycle Journal
Independent editorial
Issue 84 (2025) · EDF / European HRSG Forum article pages 48–55 · TTT advertisement pages 43–46
Published by Combined Cycle Journal
TTT campaign
Issue 85 (2026) · Pages 55–58
Published by Combined Cycle Journal

Customer case study
Combined Cycle Journal covered the EDF Bouchain project twice: in its reporting from the 2025 European HRSG Forum presentation, and in a dedicated case study on the HP economizer tube leaks at the Bouchain CCGT. Both are independent editorial articles published by Combined Cycle Journal, not TTT advertising.
Protected technology
Tuff Tube Transition technology is protected by granted patents in multiple jurisdictions, with additional international patent activity.
Contact TTT with your application or project requirements and we can help identify the appropriate technical information.