ASTM A249 TP304L L Type Finned Tube With AL1060 Fins For Waste Heat Recovery Units

ASTM A249 TP304L L Type Finned Tube With AL1060 Fins For Waste Heat Recovery Units

ASTM A249 TP304L L-Type Finned Tube with AL1060 Fins is a specialized heat exchanger component designed for efficient heat transfer in various industrial applications. Here's a detailed breakdown:

1. Base Tube: ASTM A249 TP304L

Material: Stainless Steel 304L (low carbon variant, ≤0.03% carbon).

Standard: ASTM A249 specifies seamless and welded austenitic steel tubes for boilers, heat exchangers, and condensers.

(1). Chemical Composition (Weight %)

The composition complies with ASTM A249/A249M and ASTM A312/A312M (for seamless/welded pipes).

Key Notes:

Low Carbon (≤0.035%): Reduces carbide precipitation during welding, improving corrosion resistance in welded structures (hence "L" grade).

Molybdenum (2-3%): Enhances resistance to pitting and crevice corrosion, especially in chloride environments (e.g., seawater, chemical processing).

(2). Mechanical Properties (ASTM A249)

Additional Notes:

Heat Treatment: Solution annealed at 1010–1120°C (1850–2050°F) followed by rapid cooling (quenching) to maintain corrosion resistance.

Impact Toughness: Excellent at cryogenic temperatures due to austenitic structure.

Weldability: Excellent (no post-weld heat treatment required).

2. L-Type Finned Tube

Fin Type: "L-Type" refers to fins that are embedded or wound into a groove on the tube's outer surface, ensuring strong mechanical bonding.

Advantages:

• Enhanced heat transfer efficiency due to increased surface area.
• Robust fin-to-tube contact, reducing thermal resistance.

3. AL1060 Fins

Material: Aluminum 1060 (99.6% pure aluminum).

Properties:

• High thermal conductivity (~235 W/m·K), ideal for heat dissipation.
• Lightweight, corrosion-resistant, and cost-effective.
• Soft and malleable, making it easy to form into fins.

4. Key Features or Benifits

✅ Corrosion Resistance: TP304L (internal) + AL1060 (external) combo suits harsh environments.
✅ Thermal Efficiency: Aluminum fins (235 W/m·K) enhance heat transfer vs. steel fins.
✅ Cost-Effective: Cheaper than all-stainless-steel finned tubes while maintaining performance.
✅ Durable Bonding: L-Type fins resist vibration/thermal expansion loosening.

5. Why This Combination?

Cost-Effectiveness: Aluminum fins are cheaper than stainless steel while providing superior thermal performance.

Durability: TP304L resists oxidation and pitting, while AL1060 forms a protective oxide layer.

The ASTM A249 TP304L L-Type Finned Tube with AL1060 Fins is a high-efficiency heat transfer component widely used in industries where corrosion resistance, thermal performance, and durability are critical. Below are its key applications:

1. Air-Cooled Heat Exchangers (ACHEs)

• Power Plants: Cooling steam condensers, turbine exhausts, and auxiliary systems.
• Oil & Gas: Cooling process fluids (e.g., hydrocarbons, natural gas) in refineries and petrochemical plants.
• HVAC Systems: Used in large industrial chillers and air handlers.

2. Waste Heat Recovery Systems

• Cement & Steel Plants: Recovers heat from exhaust gases to preheat combustion air.
• Chemical Processing: Recovers energy from hot flue gases or process streams.

3. Refrigeration & Condensers

• Ammonia/CO₂ Refrigeration: Used in cold storage, food processing, and industrial cooling.
• Evaporative Condensers: Enhances heat rejection in cooling towers.

4. Industrial Boilers & Economizers

• Heat Recovery Steam Generators (HRSGs): Recovers waste heat from gas turbines.
• Boiler Exhaust Gas Cooling: Lowers flue gas temperatures before emission treatment.

5. Marine & Offshore Applications

• Seawater Cooling Systems: Used in ship engines and offshore platforms.
• Desalination Plants: Preheats feedwater in multi-stage flash (MSF) or MED systems.

6. Renewable Energy Systems

• Geothermal Power Plants: Transfers heat from geothermal brine.
• Biomass Boilers: Recovers heat from combustion gases.

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always.   The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

Our factories main products as below : 
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

Factory 2th: Carbon steel seamless tube, Alloy steel seamless tube; Enhanced Heat Tranfer Tube, low fin tube ,U bending workshop;
Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube,  KL type fin tube), Embedded G type fin tube , Extruded fin tube,  low fin tube, U bend & 180deg. Return;

Yuhong Holding Group also has gained rich experience for project package( products contain:Pipes, Fittings, Flanges, heat exchanger, furnace, fired heater, air cooler, boiler) , YUHONG brand has marked its global presence in more than 85 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand, Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine, Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy, Gernmany, Poland, Spain,... We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers as stockists around the world.