What is done to facilitate tube removal on water tube boilers?

Facilitating tube removal in water tube boilers primarily involves making some tubes removable. This design choice allows for easier maintenance, repairs, and replacement of tubes without requiring a complete shutdown of the boiler or extensive disassembly. By utilizing removable tubes, operators can efficiently access and service individual components, which enhances the overall reliability and longevity of the boiler system.

Welding every tube in place would significantly complicate maintenance, as it would require more extensive procedures to remove and replace any tube that may become damaged or fouled. The use of flexible materials for tubes is not common, as they need to be rigid and capable of withstanding high pressure and temperature. Coating tubes to prevent sticking might be beneficial in certain contexts, but it does not directly address the need for tube removal in water tube boilers, which is fundamentally about the design and accessibility of the components.