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ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
Specifications
Brand Name :
YUHONG GROUP
Place of Origin :
CHINA
MOQ :
1PC
Price :
N
Payment Terms :
L/C, T/T
Supply Ability :
10000 tons/month
Delivery Time :
According to the quantity
Packaging Details :
IRON FRAME CASE WITH PLASTIC CAP
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
Description

ASTM A335 P9 Base Tube

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 . . .


A335 P9 Solid Fin Tube FAQ

1. 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, heaters, and heat exchangers.

2. What are the 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

3. Where are SA335 P9 fin tubes commonly used?

  • Power plants (superheaters, reheaters)
  • Refineries (fired heaters, reformers)
  • Petrochemical (ethylene crackers, heat recovery units)
  • Waste heat boilers (recovering exhaust gas energy)

4. Why choose solid fins over helical/embedded fins?

  • Higher durability (no risk of fin separation)
  • Better heat transfer (continuous metal bond)
  • Suitable for extreme thermal cycling

5. What are the ASTM/ASME standards for SA335 P9 fin tubes?

  • Base Tube: ASTM SA335 P9 (seamless pipe)
  • Fin Tube: Typically complies with ASME B36.10M (dimensions), ASTM A213 T9 (tube equivalent)
  • Testing: Hydrostatic, ultrasonic (UT), eddy current (ET) per ASTM A450

6. How are SA335 P9 fin tubes manufactured?

  • 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

7. What are the 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)

8. How does SA335 P9 compare to P11, P22, or P91?

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

ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler

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ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler

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Product Detail
Brand Name :
YUHONG GROUP
Place of Origin :
CHINA
MOQ :
1PC
Price :
N
Payment Terms :
L/C, T/T
Supply Ability :
10000 tons/month
Contact Supplier
video
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler
ASME SA335 P9 Solid Fin Tube Used for Waste Heat Recovery and Steam Boiler

YUHONG HOLDING GROUP CO., LTD

Verified Supplier
1 Years
ningbo
Since 1990
Business Type :
Manufacturer, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Heat Exchanger Tube, Studded Tube, Duplex Stainless Steel Heat Exchanger Tube
Total Annual :
50M-70M
Employee Number :
50~800
Certification Level :
Verified Supplier
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