Which characteristic is true for immersion boiler tube bundles?

Immersion boiler tube bundles are designed to provide efficient heat transfer while being integrated within a boiler system. Being able to easily remove these tube bundles for maintenance is crucial for ensuring the longevity and operation efficiency of the system. Routine maintenance can include cleaning, inspection, and replacement of tubes that may be damaged or degraded over time. This accessibility directly contributes to minimizing downtime and maintaining performance, making this characteristic particularly valuable in practical applications.

In contrast, other options might imply characteristics that are not inherent to immersion boiler tube bundles. For instance, the ability to withstand extremely high temperatures and pressures is relevant but does not specifically highlight the ease of maintenance integral to the design of these bundles. Similarly, having negligible electrical resistance and conducting current through the boiler water relate more to operational principles than to structural aspects of the tube bundles. Therefore, the aspect of maintenance accessibility is the defining feature in understanding the functionality of immersion boiler tube bundles.