When rolling and expanding tubes, how far should they extend?

When rolling and expanding tubes in a boiler, extending the tubes by 1/4 inch is essential for ensuring a proper seal between the tubes and the tube sheets. This extension is critical because it allows for thermal expansion and any movement that may occur during operation. The correct extension length contributes to maintaining pressure integrity and preventing leaks, which are vital for the safe and efficient operation of high-pressure boilers.

In practice, if the tubes are not extended enough, they may not be properly anchored in the tube sheets, leading to potential failures or leaks. Conversely, extending them too far can create stress points that could lead to damage. Therefore, the 1/4 inch specification represents an optimal balance for both security and flexibility in the tubing system.