HFW Solid Welded Finned Tubes ASTM A312 TP321H Stainless Steel For Superheaters

HFW Solid Welded Finned Tubes ASTM A312 TP321H Stainless Steel For Superheaters

HFW (High‑Frequency Welded) solid welded finned tubes with base tube ASTM A312 TP321H stainless steel are high‑performance heat transfer components specifically widely used for superheater applications in power boilers, waste heat recovery systems, and high‑temperature industrial furnaces. The solid fin design achieves metallurgical bonding through high-frequency welding, and possesses excellent heat transfer efficiency and structural integrity under extreme temperature and pressure conditions.

Chemical Composition (%) max

Mechanical Properties

TP321H is a titanium-stabilized, high-carbon austenitic stainless steel tube widely used in high-temperature sections such as superheaters and reheaters in boilers.TP321H provides excellent creep strength and high-temperature structural stability under long-term service at elevated temperatures up to around 650–700°C.The titanium stabilization effectively avoids chromium carbide precipitation during welding and high-temperature service, greatly improving corrosion resistance.And it performs well in high-temperature flue gas environments, resisting oxidation and corrosion, ensuring a long service life.

Key Advantages For Superheater Service

Outstanding high-temperature stability:TP321H adopts titanium stabilization treatment and a high carbon content, featuring excellent creep and thermal fatigue resistance, which is crucial for superheaters operating under cyclic high-temperature steam and flue gas conditions.

Outstanding heat transfer efficiency:the robust HFW stainless steel fins maximize the surface area, significantly enhancing the heat exchange rate.
Strong structural integrity:the metallurgical fins combined with the tubes ensure that no fins will fall off under vibration, thermal expansion, and pressure cycling conditions.

Corrosion and oxidation resistance:capable of resisting intergranular corrosion, high-temperature oxidation, and scaling in boiler flue gas, extending service life and reducing maintenance work.

Design flexibility:suitable for various superheater configurations and can be made into U-shaped bends, spiral tubes, or straight sections.

Applications of A312 TP321H HFW Finned Tubes

Power Industry:boiler economizers, superheaters, water walls;air-cooled condensers for power plants;waste heat recovery systems;etc.

Petrochemical Industry:air coolers, heat exchangers, condensers, reboilers;high-temperature and corrosive process gas cooling;oil refining and chemical synthesis units;etc.

HVAC & Construction:central heating systems, radiators, heat exchangers;air conditioning evaporators and condensers;