ASTM A376 TP347H HFW Solid Finned Tube With 11Cr Fins For Power Plant Boilers

ASTM A376 TP347H HFW Solid Finned Tube With 11Cr Fins For Power plant boilers

ASTM A376 TP347H HFW Solid Finned Tube with 11Cr Fins refers to a high-performance finned tube used in high-temperature and high-pressure applications, particularly in boilers, heat exchangers, and superheaters. Here's a breakdown of its components:

1. Base Tube: ASTM A376 TP347H

ASTM A376: Standard specification for seamless austenitic steel pipes for high-temperature service.

TP347H: A grade of austenitic stainless steel with:

High chromium (Cr) and nickel (Ni) content (typically 17-19% Cr, 9-12% Ni).

Stabilized with niobium (Nb) to prevent carbide precipitation (improves corrosion resistance at high temps).

"H" designation indicates high carbon content (0.04-0.10%) for enhanced creep strength at elevated temperatures.

(1). Chemical Composition (Weight %)

(2). Mechanical Properties (Room Temperature)

2. HFW (High-Frequency Welded)

The tube is manufactured using high-frequency induction welding, a process that ensures a strong, consistent weld seam. HFW tubes are cost-effective alternatives to seamless tubes while maintaining good mechanical properties.

3. Solid Finned Tube

The tube has externally attached fins to increase heat transfer efficiency.

Solid fins mean the fins are mechanically bonded (e.g., welded, extruded) to the tube, ensuring durability under thermal cycling.

4. 11Cr Fins

The fins are made of 11% chromium (11Cr) steel, a material chosen for:

• High-temperature oxidation resistance (better than carbon steel fins).
• Compatibility with the TP347H base tube in thermal expansion and corrosion resistance.
• Common in power plants and waste heat recovery systems where sulfur and other corrosive elements are present.

The ASTM A376 TP347H HFW Solid Finned Tube with 11Cr Fins is designed for high-temperature, high-pressure, and corrosive environments, making it ideal for industries where heat transfer efficiency and material durability are critical. Here are its key applications:

1. Power Generation (Coal, Gas & Waste-to-Energy Plants)

• Superheaters & Reheaters:
  • Used in boilers to convert saturated steam into superheated steam (typically at 550–700°C).
  • The TP347H base tube resists creep, while 11Cr fins withstand flue gas corrosion (e.g., sulfur, chlorides).
• Heat Recovery Steam Generators (HRSGs):
  • Recovers waste heat from gas turbines to produce steam.
  • HFW (High-Frequency Welded) construction balances cost and performance.

2. Petrochemical & Refinery Heaters

• Fired Heaters & Cracking Furnaces:
  • Handles high-sulfur fuels and acidic gases (e.g., H₂S, SOₓ).
  • 11Cr fins resist sulfidation (better than carbon steel or 304H fins).
• Catalytic Reformer Units:
  • Operates at 600–800°C; TP347H’s niobium stabilization prevents sensitization.

3. Waste Incineration & Biomass Boilers

• Corrosive Flue Gas Environments:
  • Combats chlorine, alkali metals, and fly ash (common in waste/ biomass combustion).
  • Solid fins ensure mechanical stability under thermal cycling.

4. Chemical Processing

• High-Temperature Reactors & Exchangers:
  • Used in ammonia, methanol, and sulfuric acid production.
  • HFW tubes reduce costs vs. seamless alternatives without sacrificing performance.

5. Oil & Gas (Upstream & Midstream)

• Exhaust Gas Boilers (EGBs):
  • Recovers heat from diesel engine exhausts on ships/offshore platforms.
  • 11Cr fins resist saltwater-induced pitting and erosion.

Why This Combination?

Advantages Over Alternatives

• VS. TP304H Finned Tubes: Better for high-sulfur environments (11Cr > 18Cr in sulfidation resistance).
• VS. Extruded Fins: Solid welded fins offer stronger bonding under thermal stress.
• VS. Carbon Steel Fins: Longer lifespan in corrosive/oxidizing conditions.

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.