De Dietrich Fire tube 97951037

The De Dietrich 97951037 is a fire tube designed for use in De Dietrich G 300 S and G 303-3S boilers. It has an outer diameter of 120 mm and is made from high-temperature resistant steel. This component is part of the boiler's heat exchanger, carrying hot combustion gases through the water jacket to transfer heat to the heating circuit. It is categorized as a boiler pipe fitting.

When selecting a replacement fire tube of this kind, critical factors include the tube's outer diameter, wall thickness, overall length, and material grade. These dimensions must match the original tube to ensure proper fitting into the tube sheet at both ends and to maintain correct heat transfer surface area. The material must be compatible with the operating temperature and condensate chemistry if the boiler is condensing. Always compare the code embossed on the original tube against the codes listed for the replacement part before ordering.

Fire tubes of this kind can fail due to corrosion, thermal stress, or material fatigue, leading to leaks or reduced heat transfer. Symptoms may include water leakage, decreased boiler efficiency, or restricted gas flow. Check for visible cracks, corrosion, or soot buildup on the tube, and verify that the tube is properly seated in the tube sheet.