ASTM A269 TP321 High-Frequency Welded Finned Tubes are engineered for waste heat recovery systems requiring excellent high-temperature performance, oxidation resistance, and long-term structural stability. Manufactured by high-frequency resistance welding technology, the fins are firmly welded onto the tube surface, ensuring efficient heat transfer and excellent mechanical strength under demanding operating conditions.

The TP321 stainless steel base tube contains titanium stabilization, providing improved resistance to intergranular corrosion after exposure to high temperatures. Compared with conventional stainless steels such as TP304, TP321 offers enhanced thermal stability and is widely selected for high-temperature heat recovery equipment in chemical, petrochemical, power generation, and industrial furnace applications.

These finned tubes are suitable for environments involving hot exhaust gases, thermal cycling, and continuous operation, making them an ideal heat transfer solution for waste heat boilers and related energy recovery systems.

Common Applications

ASTM A269 TP321 High-Frequency Welded Finned Tubes are commonly used in:

Waste heat boilers
Industrial furnace heat recovery systems
Petrochemical process heaters
Ethylene cracking furnace convection sections
Refinery exhaust gas heat recovery units
Chemical plant heat recovery equipment
High-temperature air preheaters
Energy-saving heat exchanger systems
Industrial exhaust gas cooling systems

Product Features

High Temperature Performance

TP321 stainless steel provides excellent resistance to oxidation and thermal fatigue, making it suitable for high-temperature waste gas recovery applications.

Strong Fin-to-Tube Bond

High-frequency welding creates a strong metallurgical bond between the fin and tube, improving heat transfer efficiency and preventing fin loosening during thermal expansion and vibration.

Corrosion Resistance

The titanium-stabilized structure of TP321 improves resistance to chromium carbide precipitation and intergranular corrosion during prolonged high-temperature service.

Long Service Life

The combination of stainless steel construction and welded fin technology provides reliable operation in harsh industrial environments.

Typical Size Range

The dimensions of ASTM A269 TP321 high-frequency welded finned tubes can be customized according to project requirements. Common manufacturing ranges are listed below:

Item	Typical Range
Base Tube Outside Diameter	12.7 mm – 219.1 mm
Base Tube Wall Thickness	1.5 mm – 12.7 mm
Tube Length	Up to 18,000 mm
Fin Height	6 mm – 30 mm
Fin Thickness	0.8 mm – 3.0 mm
Fin Pitch	2.0 mm – 10 mm

Chemical Composition of ASTM A269 TP321 Stainless Steel

Element	Composition (%)
Carbon (C)	≤ 0.08
Silicon (Si)	≤ 1.00
Manganese (Mn)	≤ 2.00
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Chromium (Cr)	17.0 – 19.0
Nickel (Ni)	9.0 – 12.0
Titanium (Ti)	5 × C – 0.70
Iron (Fe)	Balance

Mechanical Properties of ASTM A269 TP321 Stainless Steel

Property	Minimum Requirement
Tensile Strength	≥ 515 MPa
Yield Strength (0.2% Offset)	≥ 205 MPa
Elongation	≥ 35%

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Tabung Sirip Ekstrusi

Tabung sirip luka

Tabung sirip rendah

Tabung Fin persegi

Tabung Pinus Panjang

Tabung Transfer Panas yang Ditingkatkan

Dukungan tabung sirip

Kembali Bend

Tabung penukar panas

Tabung Penukar Panas Stainless Steel

Tabung penukar panas stainless steel dupleks

Tabung penukar panas baja tahan karat super dupleks

Tabung penukar panas baja paduan nikel

Tabung penukar panas baja paduan tembaga

Tabung penukar panas baja paduan titanium

Tabung penukar panas baja paduan

Tabung penukar panas U BEND

Tabung penukar panas baja karbon

Tabung Ketel

Tabung Ketel Baja Alloy Nikel

Tabung Boiler Baja Tidak Berlemak

Tabung Boiler Duplex Baja Rinsing

Tabung Boiler Baja Paduan

Tabung ketel baja karbon

Bagian pemanas yang dibakar

Piring penyekat

Tubesheet

rincian produk

Tabung bertabur

Tabung sirip padat

Tabung bersirip bergerigi

Tabung G Fin yang tertanam

Tabung Sirip Ekstrusi

Tabung sirip luka

Tabung sirip rendah

Tabung Fin persegi

Tabung Pinus Panjang

Tabung Transfer Panas yang Ditingkatkan

Dukungan tabung sirip

Kembali Bend

Tabung penukar panas

Tabung Penukar Panas Stainless Steel

Tabung penukar panas stainless steel dupleks

Tabung penukar panas baja tahan karat super dupleks

Tabung penukar panas baja paduan nikel