Parallel vs. Tapered Roll Expansion: Impact on Stress Corrosion Risk

2025-06-30T08:13:05-05:00

Stress 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.

Parallel vs. Tapered Roll Expansion: Impact on Stress Corrosion Risk2025-06-30T08:13:05-05:00

When Heat Exchangers Falter: Understanding Tube Failure Mechanisms

2025-06-30T08:13:46-05:00

Heat exchangers are workhorses in countless industrial processes, facilitating crucial heat transfer operations. However, their critical function is often jeopardized by tube failures, leading to reduced efficiency, increased operational costs, and potential safety hazards. Understanding the reason behind these failures is essential for proactive maintenance and ensuring reliable operation.

When Heat Exchangers Falter: Understanding Tube Failure Mechanisms2025-06-30T08:13:46-05:00

The Critical Role of Torque in Tube Expansion: Why the Right Motor Matters

2025-05-06T14:56:48-05:00

For 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.

The Critical Role of Torque in Tube Expansion: Why the Right Motor Matters2025-05-06T14:56:48-05:00

Why Won’t This Tube Expand

2025-04-18T13:12:05-05:00

When 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.

Why Won’t This Tube Expand2025-04-18T13:12:05-05:00

Anatomy of A Tube Expander

2025-03-20T07:20:22-05:00

Tube expanding is a technique used to create a secure connection between a tube and tube sheet, by compressing the outer diameter against a fixed surface. This process ensures a leak-proof joint that is crucial for the proper functioning of heat exchangers and other pressure vessels.

Anatomy of A Tube Expander2025-03-20T07:20:22-05:00

Increase Tool Life On Tough Materials

2024-06-27T12:17:01-05:00

As end users strive for increased heat transfer efficiency, customers are often tasked with building vessels that will withstand heavy use and the test of time. This often results in the use of more wear resistant tube sheet and tube materials, such as Inconel, Hastelloy, and Duplex Stainless Steel. While exotic materials often mean longer tube life, they can take a big toll on expander tool life.

Increase Tool Life On Tough Materials2024-06-27T12:17:01-05:00

Tube Sheet Grooves and How They Impact Expansion

2025-02-10T10:44:01-05:00

Grooved 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.

Tube Sheet Grooves and How They Impact Expansion2025-02-10T10:44:01-05:00

Fabrication Company Reduces Expansion Cycle Times by 80% With Parallel Pin Expansion

2024-08-23T14:04:07-05:00

Dunn 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.

Fabrication Company Reduces Expansion Cycle Times by 80% With Parallel Pin Expansion2024-08-23T14:04:07-05:00
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