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.

• High Thermal Efficiency: The double H-fin arrangement provides double the surface area of standard longitudinal or spiral finned tubes, facilitating rapid thermal conductivity.

• Anti-Fouling & Self-Cleaning Geometry: Straight flue gas channels created by the dual square-fin configuration minimize dust accumulation and reduce soot-blower wear.

• Robust Resistance Welding: Precision flash-resistance welding ensures high contact integrity, eliminating thermal resistance at the fin-to-tube interface.

• 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.

ASTM A210 Grade 1 is a seamless medium-carbon steel specification optimized for high-pressure boiler and superheater tubes.

• Tensile Strength: ≥415MPa

• Yield Strength: ≥255MPa

• Elongation (in 2 inches / 50 mm): ≥30%

• Hardness:  ≤143HBW

To ensure zero-defect installation in critical power plant infrastructure, every production batch undergoes full-process quality inspection:

• Hydrostatic Pressure Testing: Validates tube pressure ratings under simulated power plant operational conditions.

• Eddy Current Testing (ECT): Detects surface and sub-surface imperfections along the full length of the base tube.

• Ultrasonic Flaw Detection (UT): Verifies wall thickness uniformity and internal metal soundness.

• Fin Weld Integrity Test: Mechanical pull tests and cross-sectional metallographic examinations to verify weld fusion percentage ($\ge 95\%$).

• Dimensional & Visual Inspection: Precise verification of fin pitch, alignment, tube straightness, and surface finish.

• Coal-Fired and Biomass Power Plant Economizers

• Waste Heat Recovery Boilers (WHRB)

• Gas Turbine Heat Recovery Steam Generators (HRSG)

• Industrial Petrochemical Boilers & Preheaters