ASTM A210 Gr.1 Double H-Finned Tubes for Power Plants
Our ASTM A210 Grade 1 Double H-Finned Tubes are custom-engineered thermal performance solutions designed specifically for high-stress boiler environments, waste heat recovery systems, and power plant economizers. Featuring dual H-shaped fin structures resistance-welded to seamless medium-carbon steel base tubes, this design maximizes surface heat exchange area while significantly reducing flue gas resistance and ash accumulation.
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High Thermal Efficiency: The double H-fin arrangement provides double the surface area of standard longitudinal or spiral finned tubes, facilitating rapid thermal conductivity.
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Anti-Fouling & Self-Cleaning Geometry: Straight flue gas channels created by the dual square-fin configuration minimize dust accumulation and reduce soot-blower wear.
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Robust Resistance Welding: Precision flash-resistance welding ensures high contact integrity, eliminating thermal resistance at the fin-to-tube interface.
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Reduced Pressure Drop: The open-channel fin layout lowers draft loss across the tube bank, saving power consumption on induced draft (ID) fans.
We manufacture double H-finned tubes tailored to custom engineering drawings and international boiler standards.
| Component / Parameter | Standard Range (Metric) | Standard Range (Imperial) |
|---|---|---|
| Base Tube Specification | ASTM A210 Grade A-1 / Gr.1 | ASTM A210 Grade A-1 / Gr.1 |
| Base Tube Outer Diameter (OD) | 25.4 mm – 60.3 mm | 1.0 in – 2.375 in |
| Base Tube Wall Thickness | 2.77 mm – 6.5 mm | 0.109 in – 0.256 in |
| Fin Thickness | 1.5 mm – 4.0 mm | 0.059 in – 0.157 in |
| Fin Pitch | 10 mm – 35 mm | 0.39 in – 1.38 in |
| Fin Height / Width | 30 mm – 65 mm | 1.18 in – 2.56 in |
| Tube Length | Up to 15,000 mm | Up to 49.2 ft |
ASTM A210 Grade 1 is a seamless medium-carbon steel specification optimized for high-pressure boiler and superheater tubes.
| Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) |
|---|---|---|---|---|
| ≤0.27 | ≤0.93 | ≤0.035 | ≤0.035 | ≤0.1 |
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Tensile Strength: ≥415MPa
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Yield Strength: ≥255MPa
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Elongation (in 2 inches / 50 mm): ≥30%
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Hardness: ≤143HBW
To ensure zero-defect installation in critical power plant infrastructure, every production batch undergoes full-process quality inspection:
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Hydrostatic Pressure Testing: Validates tube pressure ratings under simulated power plant operational conditions.
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Eddy Current Testing (ECT): Detects surface and sub-surface imperfections along the full length of the base tube.
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Ultrasonic Flaw Detection (UT): Verifies wall thickness uniformity and internal metal soundness.
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Fin Weld Integrity Test: Mechanical pull tests and cross-sectional metallographic examinations to verify weld fusion percentage ($\ge 95\%$).
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Dimensional & Visual Inspection: Precise verification of fin pitch, alignment, tube straightness, and surface finish.
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Coal-Fired and Biomass Power Plant Economizers
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Waste Heat Recovery Boilers (WHRB)
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Gas Turbine Heat Recovery Steam Generators (HRSG)
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Industrial Petrochemical Boilers & Preheaters
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.