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

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

What Is Parallel Pin Expansion?

2024-08-14T15:11:22-05:00

With parallel pin expansion, the rolls are set parallel with the mandrel with zero feed angle. This means that the mandrel will not self-feed as a traditional expander would. Instead, the mandrel is pushed through the expander by force, in most cases hydraulic, allowing the tube to expand.

What Is Parallel Pin Expansion?2024-08-14T15:11:22-05:00
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