SA335 P9 Solid Finned Pipe For Waste Heat Recovery And Steam Boiler
Price:
N
MOQ:
1PC
Delivery Time:
According to the quantity
Brand:
YUHONG GROUP
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 |
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Company
YUHONG HOLDING GROUP CO., LTD
Location
20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
Contact Person
Sales Dept. (Marketing Director)