U-Tube Heat Exchanger: Tube Preparation, Projection, and Expansion
Taceana Zelaya2026-04-16T07:54:27-05:00Learn how to install tubes in a U-tube heat exchanger. Manage tube projection, avoid over-rolling, and protect your bundle long-term.
Using Condenser Tube Flaring to Enhance Flow and Reliability
Taceana Zelaya2026-03-17T16:02:23-05:00Sharp tube inlets cause turbulence and erosion. Condenser tube flaring creates smoother flow, protects inlets, and extends the life of your heat transfer system.
Tube Expander Heat Management: Protecting Your Expander Tools
Taceana Zelaya2026-03-19T08:07:00-05:00Proper tube expander heat management starts with the right lubricant. Learn how to protect tooling, reduce wear, and avoid expensive replacements.
Precision In Practice: When To Roll To Torque Vs. Size In Mechanical Joining
Taceana Zelaya2025-08-07T13:02:54-05:00Mechanical joining is a fundamental manufacturing process used to create a tight seal between tubular products and their corresponding a fittings or flanges. This method relies on compressing the tube’s outer diameter against a fixed container, forming a secure and leak-tight seal. A key decision in this process revolves around whether to roll to size or roll to torque, each of which offers advantages in certain applications.
Parallel vs. Tapered Roll Expansion: Impact on Stress Corrosion Risk
Taceana Zelaya2025-08-07T13:04:09-05:00Stress corrosion cracking is a common tube failure mode in corrosive environments, which can lead to significant downtime and cost. While there are many different factors that can influence the occurrence of stress corrosion, it’s largely related to the amount of stress the tube material is under during fabrication and operation. Optimizing the manufacturing process to minimize residual stress can help reduce the likelihood of stress corrosion cracking from occurring.
The Critical Role of Torque in Tube Expansion: Why the Right Motor Matters
Erica Dzomba2025-05-06T14:56:48-05:00For years, tube expansion relied heavily on the subjectivity of "rolling to size or feel". The issue is that what one operator "sees, hears, or feels" could drastically differ from another, leading to variability and a high potential for error. The advent of torque control revolutionized this process, significantly reducing operator error and ensuring consistent, repeatable results across the board. While torque control is essential for consistency, the success often hinges on one critical factor: selecting the right motor for the job. Understanding why torque matters and the potential pitfalls of choosing the wrong motor is crucial for achieving reliable and lasting tube to tube sheet joints.
Why Won’t This Tube Expand
Erica Dzomba2025-04-18T13:12:05-05:00When expanding heat exchanger tubes, achieving the proper wall reduction is crucial for a secure and leak-free seal. Sometimes, however, tubes fail to expand sufficiently, hindering the integrity of the vessel. This article outlines common causes and troubleshooting steps for incomplete tube expansion.
Tube Sheet Grooves and How They Impact Expansion
Erica Dzomba2025-02-10T10:44:01-05:00Grooved tube sheets are the standard in most shell and tube heat exchanger applications. Providing both leak protection and improving the tube-to-tube sheet joints, grooves play an important role in prolonging the life of a tube and the efficiency of a vessel. However, in few applications where grooves are not required, there can be challenges during the tube expansion process.
Do I Need Torque Control?
Erica Dzomba2024-04-15T10:25:03-05:00With the amount of rolling motors on the market, there are a lot of variables to consider. However, one of the most common questions is around torque control, setting torque, and when it’s not needed for a job.
Fabrication Company Reduces Expansion Cycle Times by 80% With Parallel Pin Expansion
Erica Dzomba2024-08-23T14:04:07-05:00Dunn Heat Exchanger, Inc., a fabrication company located in Texas City, Texas, offers heat exchanger cleaning, decontamination, repair, and fabrication services in the highly competitive shell and tube market.