Products Description

Our Advantages

1. High Heat Transfer Efficiency

Our H-Type Finned Tubes feature a unique "H"-shaped fin design, which not only increases the heat exchange surface area but also promotes turbulence, accelerating heat exchange between the tube wall and the flowing fluid, thus significantly improving the thermal efficiency of boilers and economizers.

2. Corrosion and Oxidation Resistance

Our tubes are made from high-quality 304/316/321 stainless steel raw materials, which have passed salt spray and high-temperature oxidation tests, exhibiting excellent corrosion resistance. They can resist acids, salts, or industrial gases and resist scaling and oxidation even at temperatures above 800°C.

3. Fin Quality
Our H-Type Finned Tubes utilize a fully automated high-frequency welding system to connect the H-shaped fins to the base tube, ensuring a strong bond between the fins and the tube material and preventing fin detachment during operation and vibration.

4. Quality Control
Each of our finned tubes undergoes eddy current, ultrasonic, and hydrostatic testing to ensure complete welding and eliminate the risk of leakage. Each tube undergoes dimensional inspection to ensure that fin spacing, height, and tube diameter roundness tolerances are controlled within ±0.1mm.

5. Customized Services

Our engineering team provides one-on-one technical guidance to help you select the most suitable materials, fin designs, and specifications based on your working environment, media, and temperature conditions.

application areas

Power generation: Used in boilers and economizers, air preheaters, etc. H-shaped fins reduce exhaust gas resistance.
Petrochemical and refining industries: Used in process heaters, waste heat boilers, and heat recovery units.
Oil and gas industry: Used in gas coolers and condensers, as well as offshore and marine facilities.
HVAC and thermal systems: Used in industrial air heaters and dryers.

Steel Grades

304: Excellent corrosion resistance and weldability, suitable for air preheaters, economizers, and condensers.
316: Excellent resistance to chloride and acidic media, suitable for marine and chemical environments.
409: High cost-performance ratio, good oxidation resistance, suitable for exhaust gas and boiler systems.
410: High mechanical strength and moderate corrosion resistance, suitable for high-stress heat exchangers.

Chemical Composition

Element	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Cr (%)	Ni (%)	Mo (%)	Fe (%)
304	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–10.5	-	Balance
316	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	16.0–18.0	10.0–14.0	2.0–3.0	Balance
409	≤0.08	≤1.00	≤1.00	≤0.045	≤0.030	10.5–11.75	≤0.50	-	Balance
410	≤0.15	≤1.00	≤1.00	≤0.040	≤0.030	11.5–13.5	0.6–0.75	-	Balance

Mechanical Properties

Property	Tensile Strength	Yield Strength	Elongation	Hardness	Density	Thermal Conductivity
304	≥520 MPa	≥205 MPa	≥40 %	≤90 HB	7.93 g/cm³	16.2 W/m·K @100°C
316	≥515 MPa	≥205 MPa	≥40 %	≤90 HB	7.98 g/cm³	16.3 W/m·K @100°C
409	≥380 MPa	≥170 MPa	≥20 %	≤88 HB	7.75 g/cm³	24.9 W/m·K @100°C
410	≥450 MPa	≥205 MPa	≥20 %	≤96 HB	7.75 g/cm³	24.9 W/m·K @100°C

Possible Alternative Grades

Alternative Grades	Reasons
321 / 347	It exhibits superior temperature stability and resistance to carbide precipitation.
Duplex 2205 / 2507	It possesses excellent strength and resistance to chloride corrosion.
Incoloy 800 / 825	It is suitable for extreme temperatures and requires oxidation resistance.