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A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
Specifications
Brand Name :
YUHONG
Model Number :
Serrated Finned Tubes
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
10PCS
Price :
Negotiable
Payment Terms :
L/C,T/T
Supply Ability :
1000 tons per month
Delivery Time :
Depends on quantity
Packaging Details :
IRON FRAME WOODEN CASE
Base Tube Material :
A335 P22 Alloy Steel
Fin Material :
Carbon Steel
Fin Type :
Serrated
Fin Height (mm) :
12.7 / 15.8 / Custom
Application :
Boiler Economizers, Air Preheaters
Compliance Standard :
ASME Section I / ASTM A335
Description


Serrated Finned Tubes - A335 P22 Base Tube, Carbon Steel Fins | Boiler & Heater Application


1. Product Introduction: Serrated Finned Tubes

Our serrated finned tubes combine the high-temperature strength of chrome-moly alloy P22 base pipes with the cost-effective thermal conductivity of carbon steel fins, engineered for demanding applications in power plants, refineries, and chemical processing units.


2. Metallurgical Synergy: Base Tube & Fin Chemistry


2.1 Base Tube (A335 P22) – High-Temperatre Cuhampion


Chemical Composition per ASTM A335:


Element C Mn P max S max Si Cr Mo
% Range 0.05-0.15 0.30-0.60 0.025 0.025 0.50 max 1.90-2.60 0.87-1.13


2.2 Carbon Steel Fins – Cost-Effective Durability


Typical Composition (ASTM A570):


Element C max Mn P max S max
% Range 0.25 0.90 0.035 0.035


3. Advanced Manufacturing Process


3-Step Quality-Controlled Production:


  1. Fin Formation: Cold-rolled CS strip punched into serrated fins (fin height tolerance: ±0.15mm)


  1. High-Frequency Welding: Fins bonded to P22 base tube at 1150°C ±20°C under inert gas shield


  1. Post-Weld Treatment: Stress relieving at 650°C for 2 hours (per ASME Sec. VIII)


Critical Process Controls:


  • Weld penetration depth: ≥75% of fin thickness


  • Shear strength: ≥250 MPa (tested per EN 1390)


  • Eddy current testing: 100% tube inspection


4. Dimensional Precision & Tolerances


Parameter Tolerance (±) Standard Reference
Base Tube OD 0.75 mm ASME B36.10M
Fin Height 0.20 mm HEI Standard 2627
Fin Thickness 0.05 mm
Fin Pitch 0.3 fins per inch
Straightness 1.5 mm per meter ASTM E213


5. Critical Application Domains


Industry Application Example Temperature Range
Petrochemical Hydrocracker Charge Heaters 300°C - 550°C
Power Generation HRSG Economizers 250°C - 450°C
Waste Heat Recovery Cement Plant Pre-heaters 400°C - 600°C
Refining Crude Oil Preheaters 280°C - 480°C


6. Competitive Advantages & Proven Performance


  • Thermal Efficiency: 25-40% higher HTC than plain tubes (HTRI field data)


  • Corrosion Resistance: P22 base withstands H₂S partial pressure >0.05 psi


  • Mechanical Integrity: Creep rupture strength >80 MPa at 550°C (per NIMS data)


  • Field Experience: 15+ years service life in FCCU air preheaters (documented cases)

A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems

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A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems

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Product Detail
Brand Name :
YUHONG
Model Number :
Serrated Finned Tubes
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
10PCS
Price :
Negotiable
Contact Supplier
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems
A335 P22 Serrated Finned Tubes with CS Fins for HRSG & Heat Recovery Systems

Yuhong Group Co.,Ltd

Verified Supplier
14 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
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