High Frequency Welded Finned Tube - ASTM A335 P22 Base / 11-13Cr Fins for Boilers & Heaters

High-Frequency Welded Finned Tubes: ASTM A335 P22 Base / 11-13Cr Fins - High Temp & Corrosion Resistant

Material Synergy: The Foundation of Performance

YUHONG High-Frequency Welded Finned Tubes combine the elevated temperature strength of ASTM A335 P22 alloy

 steel with the superior corrosion and oxidation resistance of 11-13% Chromium (Cr) steel fins. This material pairing is

 specifically engineered for applications where extreme heat, pressure, and corrosive atmospheres (such as flue gases

 containing sulfur compounds) would rapidly degrade standard finned tubes. The HFW process ensures a metallurgically

 sound, low-resistance bond between fin and tube, maximizing heat transfer efficiency and long-term structural integrity

 under thermal cycling.

Core Material Specifications: Precision Chemistry for Reliability

1. Base Tube Excellence: ASTM A335 P22 (Grade P22)

• Standard: Conforms strictly to ASTM A335/A335M for seamless ferritic alloy-steel pipe for high-temperature service.

• Key Properties: Exceptional creep strength, oxidation resistance, and microstructural stability up to 593°C (1100°F).

• Chemical Composition (Typical Weight %):

2. Fin Performance: 11-13% Chromium Steel

• Material Type: Martensitic Stainless Steel.

• Key Properties: Significantly enhanced resistance to oxidation, sulfidation (sulfur corrosion), and general corrosion compared to carbon steel fins, particularly in the critical 400-600°C (750-1110°F) range. Excellent thermal expansion match to P22 base tube.

• Chemical Composition (Typical Weight %):

Engineered Precision: Dimensions & Tolerances

We manufacture to exacting standards to ensure optimal fit and performance in your heat exchanger bundles.

Note: Tolerances can be tightened based on specific application requirements.

Engineered Solutions for Critical Applications

The P22 + 11-13Cr HFW Finned Tube combination excels in harsh environments:

• Heat Recovery Steam Generators (HRSGs): Economizers, Evaporators, Superheaters exposed to flue gas corrosion.

• Fossil Fuel & Biomass Power Plants: Boilers (Economizers, Air Preheaters), Flue Gas Ducts.

• Chemical & Petrochemical Processing: Process heaters, reformers, sulfur recovery units (SRUs), waste heat boilers handling corrosive streams.

• Refineries: FCC units, heaters, pre-heat trains.

• Waste-to-Energy Plants: Boiler sections exposed to highly corrosive combustion gases.

• Air Preheaters (Ljungström / Rothemühle Types): Heating elements in corrosive flue gas paths.

• FGD Systems (Scrubbers): Inlet/outlet ducting requiring corrosion resistance.

• Industrial Drying & Process Heating.

Tailored to Your Thermal Challenge: Customization

Your unique application demands precise solutions. We offer comprehensive custom manufacturing:

1. Dimensions: Exact Base Tube OD, Wall Thickness, Fin Height, Fin Thickness, FPI, and overall Tube Length.

1. Special Fin Profiles: Solid, serrated, embedded, studded (subject to material weldability).

1. Material Variations: Consult us for other high-grade base tube/fin combinations (e.g., T11/T22/T91, 304/316/321, Alloy 825/625 fins).

1. End Configurations: Bare ends, grooved ends, flanged, specific bevels for welding.

1. Bundling & Header Integration: Kitted bundles, complete headers/manifolds (scope defined).

1. Protective Coatings: Shop primer or specialized high-temp coatings available.
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Why Partner With Us? Expertise & Quality Assured

• Decades of Metallurgical & Fabrication Expertise: Over 10 years specializing in high-performance finned tubes for extreme service. Deep understanding of material behavior under heat and corrosion.

• Rigorous Quality Control: Full traceability (MTCs), chemical analysis, dimensional checks, visual weld inspection (100%), hydrostatic testing (upon request), and adherence to ISO 9001:2015.

• Advanced HFW Technology: State-of-the-art finning machines ensuring consistent, high-integrity welds crucial for P22/11-13Cr performance.

• Global Project Experience: Proven track record supplying reliable finned tubes for critical power, petrochemical, and industrial projects worldwide.

• Technical Collaboration: Our engineering team partners with you to optimize design for performance, durability, and cost-effectiveness.

• Competitive Value: Premium quality combined with efficient manufacturing and global logistics for total cost advantage.

• Dedicated Export Support: Seamless documentation, packaging, and shipping compliance.

Ready to Enhance Your Heat Exchanger Reliability?

Contact our technical sales team today for a detailed quote, technical consultation, or to discuss your specific ASTM A335 P22 / 11-13% Cr HFW finned tube requirements. Let our expertise solve your high-temperature corrosion challenge