ASTM A213 TP347H HFW Solid Finned Tube With 11-13Cr Fins For Superheaters

ASTM A213 TP347H HFW Solid Finned Tube with 11-13Cr Fins For Superheaters

The ASTM A213 TP347H HFW Solid Finned Tube with 11-13% Cr Fins is a specialized high-performance heat exchanger tube designed for high-temperature and corrosive environments. Below is a detailed breakdown of its components and applications:

1. Base Tube: ASTM A213 TP347H

(1). Chemical Composition (ASTM A213 TP347H)

The composition meets ASTM A213 and ASME SA213 specifications. Key elements include:

Notes:

"H" designation: Higher carbon (0.04–0.10%) for improved creep strength at elevated temps.

Niobium (Nb): Binds carbon to prevent chromium carbide formation (sensitization), enhancing weldability and corrosion resistance.

(2). Mechanical Properties (Room Temperature)

(3). High-Temperature Properties

TP347H is designed for service up to ~700°C (1292°F):

• Creep Strength: Excellent due to Nb stabilization and controlled carbon content.
• Oxidation Resistance: Forms a protective Cr₂O₃ layer at high temps.
• Thermal Expansion: Higher than ferritic steels (similar to other austenitics like 304H).

(4). Key Advantages of TP347H

✅ Nb stabilization reduces sensitization risk during welding.
✅ High creep strength at temps above 600°C.
✅ Good oxidation resistance in steam and flue gas environments.

2. Manufacturing Process: HFW (High-Frequency Welded)

HFW Tube: The base tube is made using High-Frequency Welding, a process that ensures a strong, consistent seam.

More cost-effective than seamless tubes but with comparable strength for many applications.

Suitable for high-pressure/temperature service if properly heat-treated.

3. Fins: Solid Fins with 11-13% Cr

• Fin Material: Typically a martensitic or ferritic stainless steel (e.g., AISI 409, 410, or similar).
• 11-13% Cr provides moderate heat and corrosion resistance while maintaining durability.
• Lower Cr than the base tube (TP347H) but sufficient for fin applications where mechanical strength is prioritized over extreme corrosion resistance.
• Fin Type: Solid fins (as opposed to serrated or embedded fins) offer:
• Better mechanical strength and heat transfer efficiency.
• Resistance to abrasion and oxidation in high-gas-flow environments.

4. Why This Combination?

• Base Tube (TP347H): Handles high temps/pressure + corrosion resistance.
• Fins (11-13% Cr): Provides cost-effective durability for extended surfaces exposed to flue gases/abrasion.
• HFW Process: Balances performance and affordability.

Comparison with Alternatives

Key Considerations

• Fin Bonding Method: Ensure fins are welded or tension-wrapped securely to avoid detachment under thermal cycling.
• Oxidation Resistance: 11-13% Cr fins may require protective coatings in highly oxidizing environments.
• Inspection: HFW tubes should be tested for seam integrity (e.g., hydrostatic, eddy current).

Conclusion

This tube is a cost-optimized solution for high-temperature heat transfer where the base tube handles harsh conditions while the fins provide durable, efficient heat exchange. For even harsher environments, higher-Cr/Ni fins or clad tubes might be used.

Primary Applications of ASTM A213 TP347H HFW Solid Finned Tube with 11-13% Cr Fins:

1. Power Generation (Coal, Gas, Waste Heat Recovery)

• Superheaters & Reheaters:
• The TP347H base tube withstands high-pressure steam (up to ~700°C) in boilers, while the 11-13% Cr fins resist oxidation from flue gases.
• Used in coal-fired plants and combined-cycle gas turbines (CCGT).
• Heat Recovery Steam Generators (HRSGs):
• Recovers waste heat from turbine exhaust gases, where fins enhance heat transfer efficiency.

2. Petrochemical & Refining

• Fired Heaters & Process Heat Exchangers:
• Resists sulfur-containing gases (e.g., in crude oil refining) due to TP347H’s corrosion resistance.
• Catalytic Reformer Units:
• Handles high temps (500–600°C) and corrosive hydrocarbon streams.

3. Waste Incineration & Biomass Plants

• Economizers & Air Heaters:
• The 11-13% Cr fins endure abrasive ash and acidic flue gases (e.g., from burning waste/biomass).

4. Chemical Processing

• Sulfuric/Nitric Acid Production:
• TP347H resists acidic condensation, while fins tolerate moderate corrosion.

5. Steel & Cement Industries

• Preheaters & Exhaust Gas Ducts:
• Fins withstand high-dust environments; base tube handles thermal cycling.

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.