Welded Longitudinal Finned Tubes — Stainless Steel Heat Exchanger Tubes for Oil

Material Overview

Welded longitudinal finned tubes are advanced heat transfer components consisting of a stainless steel base tube with fins welded axially along its external surface, significantly increasing the effective heat exchange area compared to a smooth tube. This design enhances thermal performance and is especially suited for demanding environments such as oil heat exchange systems, petrochemical processing, and industrial utilities. Stainless steel materials are selected for this product due to their corrosion resistance, high temperature tolerance, mechanical robustness, and longevity in aggressive media.

Specifications

• Tube Type: Welded longitudinal finned tubes

• Material Grades: Stainless Steel (e.g., SS304/304L, SS316/316L, SS321, Duplex grades)

• Outer Diameter (OD): Typically 16 mm – 273 mm or customized depending on application requirements

• Wall Thickness: 0.5 mm – 5 mm (typical range, application dependent)

• Fin Height: Customizable per thermal design

• Fin Attachment: Resistance (high‑frequency) welded longitudinal fins

• Surface Finish: Annealed, pickled, or passivated for corrosion protection

Key Features

• Enhanced Heat Transfer: Fins dramatically increase surface area, boosting heat exchange efficiency over plain tubes.

• Superior Corrosion Resistance: Stainless steel resists oxidation and corrosion even in harsh oil and chemical environments.

• High Mechanical Strength: Suitable for high pressure and temperature service.

• Wide Material Compatibility: Compatible with different heat exchanger designs and fluids, including oils, steam, and gases.

• Long Service Life & Lower Maintenance: Robust design reduces fouling and extends operational life.

Our Competitive Advantages

1. Optimized Heat Transfer Efficiency: Designed with fins engineered for maximum surface area, ensuring rapid and efficient heat exchange even with viscous oil media, improving thermal throughput compared to bare tubes.

2. Industrial‑Grade Material Supply: We source high‑quality stainless steel compliant with international standards (ASTM, EN, JIS) to ensure corrosion resistance and mechanical integrity in oil processing applications.

3. Precision Welding Technology: Our advanced resistance welding process yields consistent fin attachment with minimal defects, ensuring strong metallurgical bonds and long‑term reliability.

4. Customized Solutions & Technical Support: We work with customers on fin dimensions, tube sizing, and material grade selection based on specific oil heat exchanger requirements, reducing energy costs and optimizing system design.

5. Proven Performance in Harsh Environments: Stainless steel finned tubes are widely validated in petrochemical, power generation, and oil & gas heat exchanger systems for long‑term performance and reduced downtimes.

Chemical Composition Comparison

Mechanical Properties Comparison

Applicable Standards

• ASTM A213 / ASME SA213 – Seamless and welded ferritic/austenitic alloy, heat‑exchanger and condenser tubes.

• ASTM A249 – Welded austenitic steel boiler, superheater, heat exchanger and condenser tubes.

• ASTM A789 / ASME SA789 – Seamless and welded ferritic/austenitic stainless steel tubing for general service.

• JIS G3463 – Stainless steel tubes for boiler and heat exchanger applications (Japan).

• EN / ISO Standards – Various EN norms covering stainless steel tube dimensions and mechanical requirements.

Application Fields

Typical Sectors

• Oil & Gas Processing – Used in oil coolers, crude exchangers, and refining units.

• Petrochemical & Chemical Plants – Perfect for aggressive fluids and high duty heat exchange.

• Power Generation – Boilers, condensers, and waste heat recovery systems.

• HVAC & Refrigeration – Efficient thermal management in heating and cooling systems.

• Marine & Offshore Equipment – Heat exchangers dealing with seawater and oils.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.