An Introduction to the Selection, Corrosion Protection, and Removal and Installation of G‑Type Finned Tubes

About G-type finned tube An introduction to selection, corrosion prevention, and disassembly/installation issues.

Points to consider when selecting G-type finned tubes:

　　1. The working pressure of the finned-tube radiator shall meet the system’s operating pressure and comply with the applicable requirements specified in the relevant product documentation.

　　2. For residential buildings, finned-tube radiators with an aesthetically pleasing appearance and easy-to-clean surfaces should be selected.

　　3. For industrial buildings with high dust emissions or stringent dust-control requirements, finned-tube radiators that are easy to clean should be selected.

　　4. Industrial buildings containing corrosive gases or rooms with relatively high humidity shall use corrosion-resistant finned-tube radiators.

　　5. When selecting steel finned-tube radiators, a closed-loop system should be used, and the product’s water-quality requirements must be met. During the non-heating season, the heating system should remain filled with water for proper maintenance.

6. When selecting aluminum finned-tube radiators, choose models with internally corrosion-resistant fins and ensure they meet the product’s requirements for water quality.

　　 G-type finned tube Anti-corrosion measures:

　　1. The design of the finned-tube heating system should, as far as possible, minimize the circulation of oxygen‑rich fluids and maintain a closed-loop configuration, such as by using vent lines or circulating water pumps. Furthermore, throughout the operation of the finned-tube system, it is essential to prevent low‑pressure conditions, which can lead to water shortages.

　　2. When replenishing or adding water to finned tubes, this is the most effective way to address deoxygenation.

　　3. The heating water in G-type embedded finned tubes should be appropriately treated with a buffering agent.

　　4. When finned-tube heating is interrupted, thorough maintenance should be performed using dry water or deoxygenated water.

5. For the G‑type finned tubes of new equipment, whether conducting a pressure test or introducing organic solvents, rust‑preventive oil shall be applied at the commencement of the hydrostatic test.

　　Precautions for the removal and installation of G-type finned tubes:

　　1. Before dismantling the G‑type finned tubes, measure the standard length of the plate bundle and record the measurement. Use this reference value when selecting replacement parts next time. Inspect the sealing gaskets; if they are stuck between the grooves, gently pry them apart with a small screwdriver, inserting it at an easy point to facilitate separation. Do not damage the components. G-type finned tube the gasket; otherwise, it will compromise the daily sealing performance.

　　Secondly, inspect the G‑type finned tubes for perforation defects. A magnifying glass or an illuminated inspection method may be used. If foreign matter is found between the inlet/outlet stubs and the flow channels during inspection, the surface filter will lose its effectiveness entirely and must be cleaned immediately. Common cleaning methods include chemical cleaning and manual direct cleaning.

　　3. If scale forms on the heat-transfer plates of G‑type finned tubes, do not use a wire brush under any circumstances, as this may compromise the corrosion‑resistant properties of the plates. If dirt and rust are particularly noticeable, clean the surfaces with a specialized descaling powder. The cleaning solution must be free of corrosive substances such as sulfur, acids, or salts. Perform a visual inspection to check whether the G‑type finned tube plates are deformed; if the degree of deformation exceeds the permissible limit, the plates must be replaced.

4. Sealing gaskets play a crucial role in G‑type finned tube heat exchangers; the grooves must be free of solid particles such as iron filings and sand. During disassembly, titanium plates should not come into contact with any open flame to prevent undesirable oxidation. The surface appearance of the finned tubes should be neat, with scratches minimized.