Curran International offers full-length tube liners that restore thinned and aging exchanger tubes for years of continued reliable operation. Our process involves installing and hydraulically expanding a full-length tube inside an existing exchanger tube, creating an intimate contact that establishes a durable shield against further thinning and wear. We have the ability to procure any metallurgy your site specifies, including 304, 316, C276, 825, 625, and more.

Key Benefits

• Wear and Thinning Protection: The alloy liner acts as a robust barrier against thinning and future wear, significantly improving the reliability and lifespan of your exchangers.
• Selective Installation: Liners can be selectively installed where needed, based on tube NDE inspection data indicating severe thinning.
• Continued Operation: The installed liner eliminates the need to plug tubes, allowing for uninterrupted, reliable operation of your exchangers.

Installation Process

• Onsite Installation: Curran can install full-length tube liners during routine maintenance and unit turnarounds. This service is also available for air coolers, fin fan bundles, and shell and tube condensers.
• Hydraulic Expansion: Using a hydraulic pump, the alloy liner makes intimate contact with the existing tube, ensuring a full-length tube-in-tube repair. The liner is then trimmed and mechanically roller expanded to seal the ends.
• Customization: Our tube liners are made to non-standard dimensions to fit existing exchanger tubes. We work closely with clients to plan material inventory, allowing for just-in-time execution of repair strategies.

Advanced Cleaning for Optimal Performance

Curran employs a grit blast method to thoroughly clean the tube ID, removing all deposits and optimizing the installation of the full-length tube liner. This cleaning process enhances thermal performance by ensuring that surface scale and deposits do not inhibit heat transfer, achieving NDE clean tubes.

Comprehensive Turnkey Solution

Curran International provides a turnkey solution that includes:

• Tube Cleaning: Ensuring optimal conditions for liner installation and enhanced thermal performance.
• Liner Installation: Expert installation during routine maintenance or unit turnarounds with 24/7 availability.
• Cost-Effective Implementation: Specifying alloy liners as an upgrade during an in-kind exchanger replacement at a fabrication shop.

Common Applications and Repair Strategy

• Fin Fans: Full-length tube liners are commonly used in fin fan bundles, providing a great repair strategy for aging and thinning tubes.
• Versatility: Tube liners can be installed on thinned tubes at any location within the exchanger.
• Reliability: The alloy liner serves as a robust barrier against thinning and future wear, significantly enhancing exchanger reliability.
• Efficiency: Curran's comprehensive cleaning and liner installation offer a seamless, efficient process.