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Home > Products >
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SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler
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SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler
  • name
  • name
  • name

SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler

Brand Name: YUHONG GROUP
MOQ: 1PC
Price: N
Packaging Details: IRON FRAME CASE WITH PLASTIC CAP
Payment Terms: L/C, T/T
Detail Information
Product Description
Detail Information
Place of Origin:
CHINA
Fin Wall Thickness:
0.8-3mm
Base Tube Material:
P1, P5, P11, P12, P22, P91
Fin Pitch:
FPI: 3-25
Fin Material:
AISI 304,316,409,410,321,347
Fin Height:
5-30mm
Product Name:
Max 43M/PC
Supply Ability:
10000 tons/month
Highlight:

SA335 finned pipe

,

P9 finned pipe

,

Steam Boiler heat exchanger finned tubes

Product Description
SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler
Product Specifications
Attribute Value
Fin Wall thickness 0.8-3mm
Base Tube Material P1, P5, P11, P12, P22, P91
Fin pitch FPI: 3-25
Fin Material AISI 304,316,409,410,321,347
Fin height 5-30mm
Product Name Max 43M/PC
ASTM A335 P9 Base Tube Composition
Grade UNS Designation C Mn P S Si Cr Mo Other
P9 K90941 0.15 0.30-0.60 0.025 0.025 0.25-1.0 8.0-10.0 0.9-1.1 ...
SA335 P9 Solid Fin Tube Technical Information
What is SA335 P9 Solid Fin Tube?
SA335 P9 is a seamless ferritic alloy-steel pipe (9% Cr, 1% Mo) with integrally welded or extruded fins to enhance heat transfer. It's used in high-temperature/pressure environments like:
  • Boilers
  • Heat exchangers
  • Industrial heaters
Key properties of SA335 P9
  • High-temperature strength (up to ~600°C / 1112°F)
  • Excellent creep & oxidation resistance
  • Good weldability (pre/post-weld heat treatment required)
  • Resistance to sulfidation & thermal fatigue
Common applications
  • Power plants (superheaters, reheaters)
  • Refineries (fired heaters, reformers)
  • Petrochemical (ethylene crackers, heat recovery units)
  • Waste heat boilers (recovering exhaust gas energy)
Advantages of solid fins
  • Higher durability (no risk of fin separation)
  • Better heat transfer (continuous metal bond)
  • Suitable for extreme thermal cycling
Standards compliance
  • Base Tube: ASTM SA335 P9 (seamless pipe)
  • Fin Tube: Complies with ASME B36.10M (dimensions), ASTM A213 T9 (tube equivalent)
  • Testing: Hydrostatic, ultrasonic (UT), eddy current (ET) per ASTM A450
Manufacturing process
  • Base tube: Hot extruded/seamless cold-drawn
  • Solid fins: Machined/welded integrally
  • Extruded fins: Cold-formed from base metal
  • Heat treatment: Normalized & tempered for stress relief
Temperature & pressure limits
  • Max temp: ~600°C (long-term), up to 650°C (short-term)
  • Pressure rating: Varies by wall thickness (e.g., 1000+ psi for typical power plant applications)
Grade Comparison
Grade Cr Content Mo Content Max Temp Key Advantage
P9 9% 1% 600°C Balanced cost/performance
P11 1.25% 0.50% 550°C Better weldability
P22 2.25% 1% 575°C Common in refineries
P91 9% 1% + V,Nb 650°C Superior creep strength
SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler 0
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fin tube  

Welding Fin Tube  

solid fin tube

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