1. What is ASTM A106 Gr.B Studded Fin Tube?
The ASTM A106 Gr.B Studded Fin Tube is a robust heat transfer solution designed for high-temperature and high-pressure applications. It features a seamless carbon steel base tube (ASTM A106 Grade B) with cylindrical stud fins resistance-welded perpendicularly to the tube surface. Each stud fin acts as an individual heat transfer enhancement point, creating turbulent flow to maximize thermal efficiency. Ideal for extreme conditions, this design withstands temperatures up to 450°C (842°F) and pressures exceeding 20 MPa, making it superior to traditional finned tubes in fouling-prone environments.
2. Chemical & Mechanical Properties
Chemical Properties
| Component | Chemical Composition | Key Features |
| ASTM A106 Gr.B Base Tube | • C: ≤0.30%, Mn: 0.29–1.06%, Si: ≥0.10%, Fe: Balance. | • Excellent oxidation resistance at high temperatures.
• Resists steam corrosion and scaling. |
| Stud Fins (Typical Material: Carbon Steel) | • C: 0.15–0.25%, Mn: 0.60–0.90%, Fe: Balance. | • Composition matched to base tube to prevent galvanic corrosion. |
| Synergy | • Homogeneous material system eliminates bimetallic corrosion. | • Stable in steam, oil, and non-acidic media. |
Mechanical Properties
| Component | Mechanical Performance | Key Features |
| ASTM A106 Gr.B Base Tube | • Tensile Strength: ≥415 MPa
• Yield Strength: ≥240 MPa
• Hardness: 137 HB max. | • High-pressure capability (ASME B31.1 compliant).
• Ductile fracture behavior. |
| Stud Fins | • Shear Strength per Stud: ≥350 MPa
• Fin Density: Up to 250 studs/inch². | • Resists mechanical/thermal shock.
• Self-cleaning design reduces fouling. |
| System Performance | • Max Service Temp.: 450°C
• Thermal Expansion: Matched CTE between fin/tube. | • Zero fin detachment under thermal cycling. |
3. Key Applications
· Power Generation: Boiler economizers, superheaters, and flue gas ducts in coal-fired plants.
· Oil Refining: Crude oil heaters, coker units, and vacuum distillation columns.
· Chemical Processing: Non-corrosive gas heaters and thermal fluid systems.
· Waste-to-Energy: Syngas coolers and incinerator heat recovery.
· Industrial Boilers: High-fouling fuel oil heaters and steam generators.
4. Why Choose Studded Fin Tubes?
· 30% Higher Fouling Resistance vs. helical fin tubes.
· Zero Galvanic Corrosion: Single-material carbon steel construction.
· ASME-Certified Safety: Complies with ASTM A106, ASME B31.1, and PED 2014/68/EU.
· Reduced Maintenance: Self-cleaning stud design minimizes scaling.
· 20+ Year Lifespan in 400°C+ environments.
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ASTM A106 Gr.B Seamless Carbon Steel Studded Fin Tube For Petrochemical And Refinery Industries Images
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