Serrated Finned Tubes (Base Tube ASTM A192 + Carbon Steel Fins)
High-Performance Embedded Serrated Finned Tubes for Enhanced Heat Transfer
Our serrated finned tubes, featuring a high-quality ASTM A192 seamless carbon steel base tube with embedded carbon steel (CS) serrated fins, deliver superior heat transfer efficiency in demanding industrial applications. These tubes are engineered for high-pressure environments, offering excellent thermal performance, mechanical strength, and long-term reliability.
As an experienced exporter of heat exchanger components, we specialize in manufacturing and supplying premium serrated finned tubes that meet or exceed international standards. Our products help customers optimize energy efficiency, reduce equipment size, and lower operational costs in boilers, heat exchangers, and air-cooled systems.
Product Material Specifications
Base Tube Material: ASTM A192 / ASME SA192 Seamless Carbon Steel Boiler Tubes Fin Material: Carbon Steel (common grades: 08F, SPCC, or equivalent low-carbon steel for optimal formability and thermal conductivity)
Chemical Composition
ASTM A192 Base Tube Chemical Composition (wt.%):
| Element |
Content (%) |
| Carbon (C) |
0.06 - 0.18 |
| Manganese (Mn) |
0.27 - 0.63 |
| Phosphorus (P) |
≤ 0.035 |
| Sulfur (S) |
≤ 0.035 |
| Silicon (Si) |
≤ 0.25 |
Carbon Steel Fin Material Chemical Composition (Typical for 08F/SPCC): Low-carbon steel with C ≤ 0.08%, Mn 0.25-0.50%, P ≤ 0.035%, S ≤ 0.035%. This ensures excellent ductility for serration forming and strong mechanical bonding.
Serrated Finned Tube Structure and Manufacturing Process
Our serrated finned tubes use an embedded (G-type) process for superior bond strength:
- Base Tube: High-pressure seamless ASTM A192 carbon steel tube provides the core structural integrity and pressure resistance.
- Fins: Carbon steel strip is serrated ("U" or "V" notches) to increase surface turbulence and disrupt boundary layers for better convective heat transfer.
- Embedded Process: A groove is precisely machined into the base tube. The serrated fin strip is tension-wound into the groove and mechanically locked by rolling the tube material back over the fin base. This creates a strong, metallurgical-like bond without additional filler materials, resistant to vibration, thermal cycling, and high temperatures (up to ~400°C / 752°F).
This embedded design offers better performance than wrapped or welded alternatives in high-stress applications, minimizing thermal resistance at the fin-tube interface.
Dimensions and Tolerances
We maintain tight manufacturing tolerances to ensure perfect fit in heat exchanger assemblies.
Typical Dimensions (Customizable):
- Base Tube OD: 16 mm – 63 mm (common: 25-57 mm)
- Fin Thickness: 0.4 mm – 1.5 mm (serrated)
- Fin Pitch: 3 – 333 fins per meter (1-8 FPI)
- Tube Length: Up to 10-12 meters or as required
Dimensional Tolerances (Standard Ranges):
- Base Tube OD: ±0.1 mm to ±0.2 mm
- Wall Thickness: ±10% or per ASTM A192
- Straightness: ≤ 1 mm per meter
All tubes undergo rigorous quality checks, including hydrostatic testing, dimensional verification, and bond strength evaluation.
Performance Advantages
- Superior Heat Transfer: Serrated fins increase effective surface area and promote turbulence, improving overall heat transfer coefficient by 20-30% or more compared to solid fins in gas-flow applications.
- Strong Mechanical Bond: Embedded design withstands high vibration, thermal expansion, and pressure cycling without fin loosening.
- High-Temperature & Pressure Resistance: Suitable for continuous operation in demanding boiler and superheater conditions.
- Fouling Resistance & Cleanability: Serrated design and straight gas paths reduce fouling in cleaner gas streams; easy to maintain.
- Cost-Effective: Carbon steel construction balances performance and economics for non-corrosive or mildly corrosive environments.
- Compact Design: Allows smaller heat exchangers with equivalent duty, saving space and material costs.
Detailed Application Fields
Our ASTM A192 serrated finned tubes are widely used across industries:
- Power Generation: Economizers, air preheaters, superheaters, and waste heat recovery in boilers and power plants.
- Petrochemical & Chemical Processing: Heat exchangers for process heating/cooling, condensers, and reboilers.
- Oil & Gas: Fired heaters, air-cooled heat exchangers (ACHE), and refinery applications.
- HVAC & Refrigeration: Large-scale air handling and heat recovery systems.
- Industrial Boilers & Incinerators: Efficient heat transfer in steam generation and flue gas cooling.
- Metallurgy & Cement: Waste heat boilers and drying systems.
These tubes excel in gas-to-liquid or gas-to-gas heat exchange where the gas-side heat transfer coefficient is the limiting factor.
Why Choose Us? Our Advantages and Expertise
With years of specialized experience in finned tube production and international export, we stand out through:
- Advanced Manufacturing: State-of-the-art embedded finning machines ensuring consistent quality and tight tolerances.
- Material Expertise: Strict sourcing of ASTM A192 tubes and premium CS fin stock, with full mill test certificates (MTC) provided.
- Customization: Flexible production for non-standard sizes, lengths, and fin configurations to match your exact drawings.
- Quality Assurance: ISO-compliant processes, third-party inspection options (SGS, BV, etc.), and 100% traceability.
- Global Export Experience: Proven track record supplying to Europe, Middle East, Southeast Asia, and Americas. We understand Incoterms, packaging for sea freight, and documentation requirements.
- Technical Support: Our engineers assist with thermal calculations, material selection, and integration advice for optimal system performance.
- Reliable Lead Times & Competitive Pricing: Efficient production and direct factory supply ensure value without compromising quality.
Whether you need standard stock or custom-engineered serrated finned tubes with A192 base and CS fins, we deliver solutions that enhance efficiency and durability.
Contact us today for detailed quotations, technical datasheets, or samples. Let our expertise in high-performance heat transfer components support your next project.
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