Fire-tube / smoke-tube boilers
(incl. Scotch marine boilers)
Fire-tube boilers, also known as smoke-tube boilers, are among the most common marine boiler designs. In these boilers, hot flue gases pass through tubes surrounded by water, transferring heat efficiently to generate steam.
One of the most well-known marine variants is the Scotch marine boiler, which has been widely used for decades due to its compact design and robust construction.
Advantages of fire-tube boilers
Fire-tube boilers are valued in marine applications for several reasons:
- Robust and simple construction
- High operational reliability
- Compact design suitable for engine room installation
- Stable steam production for auxiliary systems
However, due to the harsh operating environment at sea, these boilers require regular inspection and maintenance to ensure safe operation.
Typical maintenance issues
Common issues found in fire-tube boilers include:
- Tube corrosion and thinning
- Soot deposits reducing heat transfer efficiency
- Refractory wear inside the furnace
- Burner misalignment or poor combustion control
Even small deposits on heating surfaces can significantly reduce heat transfer efficiency and increase fuel consumption.
Service and repair support
Global Boiler Services provides specialised maintenance and repair services for fire-tube and Scotch marine boilers, including:
- Tube inspections and retubing
- Mechanical and chemical cleaning
- Furnace and refractory repairs
- Burner service and optimisation
Our riding crews can perform repairs both during port stays and while the vessel remains in operation.
