Fin Pipe | Rippenrohr | Lamellenrohr

Our Finned Tubes

Finned tubes, also known as heat exchange tubes,Lamellenrohr and finned tube.Fin pipe are heat transfer elements used to enhance heat transfer. They increase surface area and improve heat transfer efficiency. They are suitable for high-temperature, high-pressure, and corrosive environments in industries such as boilers, power generation, and metallurgy. Their core function is to reduce contact thermal resistance and provide corrosion and wear resistance. They are commonly used in waste heat recovery and heat exchange equipment.

Datang Fin Tube manufactures spiral welded finned tubes for:

OEM customers to incorporate into their own products
Industrial end-user customers for heating or cooling process liquids and gases
Specialist space heating applications such as in poultry sheds, churches, and greenhouses
Click here to view our finned tube products.

Datang Fin Tube Catalog

 

Rohr & Fin Arrangements

Tubes

Tube diameters: 16 mm – 273mm
Tube lengths: 150mm–30,000mm (per unit/module)
Tube types: A range of seamless and welded carbon steel and stainless steel tubes, the most common being the following:
Kohlenstoffstahl

ASTM A106B seamless
ASTM A179 seamless
EN 10255 welded

Edelstahl

ASTM A213 welded grade 304 und 316
ASTM A312 seamless grade 304 und 316

Design & Material Options

Flossen

Fin heights: 9.5mm to 38mm

Dicke der Lamellen: 0.6 mm to 1.2mm

Fins per inch: 2 to 8

Materials Combinations

Carbon steel tubes with carbon steel fins

Carbon steel tubes with stainless steel fins

Stainless steel tubes with carbon steel fins

Stainless steel tubes with stainless steel fins

Surface Treatment

Hot dip galvanised

Polyurethane coated

Zinc plated

Heat Exchanger Refurbishment and Repairs

 

Fin pipes are core components of heat exchangers, and their repair and replacement require appropriate types based on specific operating conditions.

Fin Tube Repair Precautions

Flange Joints: If a flanged fin tube leaks, inspect the sealing surface for damage or loose bolts. Replace the gasket or retighten the bolts if necessary.

Contact Thermal Resistance: For high-frequency welded fin tubes, if localized detachment occurs, replace the damaged section and re-weld or repair using a metallurgical bonding process.

Tube Bundle Arrangement Adjustment: If heat transfer efficiency decreases, inspect the fin shape for deformation and optimize the arrangement (staggered/sequential). Redesign the arrangement or replace the fins if necessary.

Fin Pipes Replacement Recommendations

Fin Tube Material Matching: When replacing fin tubes, ensure the base tube (e.g., Kohlenstoffstahl, Edelstahl) and flange material are consistent to prevent electrochemical corrosion. Fin Tube Process Selection: Fin tubes using the high-frequency welding process (metallurgical bonding) are preferred. They offer high tensile strength and a shedding rate of less than 0.1%, making them suitable for high-temperature and high-pressure applications.

Fin Tube Shape Compatibility: Spiral fins are suitable for most heat exchange applications. Straight fins can be used to reduce air resistance.

Fin Tube Installation and Maintenance Tips

Bracket Securing: Ensure the bracket is secure to prevent shaking during operation, which could cause uneven contact and affect heat transfer efficiency.

Fin Tube Seal Inspection: Regularly check the seals of pipe joints to prevent leaks.

Regular Fin Tube Cleaning: Clean dust from the fin surface to prevent impaired heat dissipation.

Fin Tube Repair and Replacement: The repair and replacement of fin tubes should be tailored to the specific operating conditions (such as temperature, pressure, and media characteristics). It is recommended that professional personnel perform the repair and replacement to ensure safety and efficiency.

Datang Fin Technology

Datang specializes in producing advanced finned tubes designed to optimize heat transfer performance in a variety of industrial applications. Engineered for maximum efficiency, our finned tubes provide reliable solutions for heat exchangers, cooling systems, und mehr. Leveraging decades of expertise and cutting-edge manufacturing techniques, we offer both standard and custom finned tube solutions to meet our customers’ specific needs. Discover the power of Datang finned tubes, combining precision, performance, and innovation to elevate your heat exchange systems.

Benefits

Heating coils can be accommodated in the lowest area of the hot water tank

Optimal use of the entire storage volume for heat absorption

Favorable circulation of the storage water

Low pressure loss in the tube