ASTM A213 T5 Embedded G Type Fin Tube
Tube Material: T5, T9, T11, T12, T22
Fin Material: Alloy Steel, Carbon Steel, Stainless Steel
Bare Length: Customized
Fin Pitch: 2.1-5
Fin Height: ＜17mm
Fin Thickness: 0.3mm - 3.0mm
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Products Description
The A213 T5 Embedded Fin Tube is a high-performance heat transfer component designed for demanding industrial applications.
ASTM A213 T5 fin tube can be used in various fields to enhance heat transfer efficiency. They feature a tube with fins that are either embedded within the tube or attached externally. The "G" type often refers to a specific fin geometry or arrangement. The fins significantly increase the surface area available for heat transfer, improving the performance of the heat exchanger.
Base Tube Material: ASTM A213 T5
Alloy Composition: Chromium-molybdenum (5Cr-0.5Mo) steel, compliant with ASTM A213 T5 standards.
Key Properties:
High-Temperature Strength: Retains mechanical integrity at temperatures up to 600°C (1,112°F).
Corrosion/Oxidation Resistance: Chromium content provides resistance to scaling and oxidation in steam/high-heat environments.
Seamless Construction: Manufactured without welds, ensuring reliability under high-pressure conditions (common in boilers and superheaters).
Embedded Fin Design
Construction Process:
Grooving: Precision-machined helical or longitudinal grooves are cut into the outer surface of the base tube.
Fin Insertion: Metal fins (typically carbon steel, stainless steel, or alloy steel) are mechanically pressed or rolled into the grooves.
Bonding: The fins are cold-worked into the grooves, creating a tight mechanical bond without welding.
Geometry: Helical (spiral) or longitudinal (straight) fins; serrated fins for enhanced turbulence.
Key Features
Thermal Efficiency: Increased surface area (up to 10–15x bare tube) improves heat transfer rates in gas-to-liquid or liquid-to-liquid systems.
Ideal for applications with low-convection media (e.g., exhaust gases).
Mechanical Durability: Embedded fins resist loosening from thermal cycling or vibration.
No weld fatigue, making them suitable for high-temperature, high-stress environments.
Customization: Fins can be tailored in height, thickness, spacing, and material to optimize performance for specific loads (e.g., ash-laden flue gas, corrosive fluids).
Applications
Power Generation: Boilers, superheaters, economizers, and air preheaters.
Petrochemical: Heat recovery steam generators (HRSGs), reformers.
Industrial HVAC: Waste heat recovery from furnaces or kilns.
Marine/Offshore: Compact heat exchangers for engine cooling or fuel heating.
Advantages Over Welded/Extruded Fins
No Thermal Degradation: Cold-working preserves the base tube's metallurgical properties.
Lower Fouling Risk: Smooth groove-to-fin interface minimizes ash/debris buildup.
Cost-Effective: Longer service life in harsh conditions reduces maintenance costs.
Standards & Certifications
Complies with ASME Section I (power boilers) and Section VIII (pressure vessels).
Testing: Hydrostatic testing, non-destructive testing (NDT), and fin bond strength verification per manufacturer protocols.
T5 Seamless Tube Chemical Composition:
| Chemical Components (%) | ||||||||||||
| Grade | C | Mn | P | S | Si | Cr | Mo | V | Nb | N | Al | others |
| T5 | 0.15 | 0.30-0.60 | ≤0.025 | ≤0.025 | 0.5 | 4.0-6.0 | 0.45-0.65 | |||||
| T5b | 0.15 | 0.30-0.60 | ≤0.025 | ≤0.025 | 1.0-2.0 | 4.0-6.0 | 0.45-0.65 | |||||
T5 Seamless Tube Heat Treatment Requirements
| Grade | UNS Number | Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range °F [°C] | Subcritical Annealing or Tempering Temperature, Min or range °F [°C] |
| T5 | K41545 | full or isothermal anneal normalize and temper | … | 1250 [675] |
| T5b | K51545 | full or isothermal anneal normalize and temper | … | 1250 [675] |
T5 Tubes Tensile Requirements and Hardness:
| Mechanical properties | ||||
| Grade | Tensile | Yield | Elongation | Hardness |
| Strength (Mpa) | Strength (Mpa) | (%) | ||
| T5 | ≥415 | ≥205 | ≥30 | ≤89HRB |
GNEE A213 T5 Fin Tube for sale
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