YUHONG HOLDING GROUP CO., LTD
| Fin Pitch | 3~25mm |
| Application | Refinery & petrochemical: Fired heaters, reformer furnaces, reactor feed heaters... |
| Delivery Time | 45-60 Days (Depend on Customer's Requirements) |
| Fin Thickness | 0.8~3mm |
| Payment Terms | TT,LC |
| Bare Tube Specification&Material | ASTM A335 P9 |
| Fin Height | ＜30mm |
| Fin material | 11Cr |
| Bare Tube OD | 16~325 mm |
| Packaging Details | Ply-wooden Cases with Steel Frames and Pipe's both ends with plastic caps |
| Supply Ability | According to Clients' requirements |
| Product Name | High Frequency Welded Solid Finned Tube |
| Model Number | ASTM A335 P9 Solid Finned Tube with 11Cr Fins |
| Brand Name | YuHong |
| Place of Origin | China |
| Certification | ABS, BV, DNV, CCS, LR |
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Product Specification
| Fin Pitch | 3~25mm | Application | Refinery & petrochemical: Fired heaters, reformer furnaces, reactor feed heaters... |
| Delivery Time | 45-60 Days (Depend on Customer's Requirements) | Fin Thickness | 0.8~3mm |
| Payment Terms | TT,LC | Bare Tube Specification&Material | ASTM A335 P9 |
| Fin Height | ＜30mm | Fin material | 11Cr |
| Bare Tube OD | 16~325 mm | Packaging Details | Ply-wooden Cases with Steel Frames and Pipe's both ends with plastic caps |
| Supply Ability | According to Clients' requirements | Product Name | High Frequency Welded Solid Finned Tube |
| Model Number | ASTM A335 P9 Solid Finned Tube with 11Cr Fins | Brand Name | YuHong |
| Place of Origin | China | Certification | ABS, BV, DNV, CCS, LR |
ASTM A335 P9 Solid Finned Tube with 11Cr Fins For Power station boilers
Our custom ASTM A335 P9 solid finned tubes fitted with 11% chromium solid fins are engineered specifically for extreme working scenarios featuring sustained high temperature, elevated internal pressure and corrosive flue gas environments. Combining pressure-resistant alloy seamless base pipe and corrosion-proof chromium alloy fins, this dual-material composite heat exchange tube solves the common points including fin root cracking, thermal mismatch failure and rapid surface oxidation faced by ordinary carbon steel fin tubes in heavy-duty industrial heating systems.
1. Base Tube: ASTM A335 P9 Seamless Ferritic Alloy Steel Pipe
(1) Chemical Composition
The composition is defined by specific ranges and maximums for alloying elements that provide high-temperature strength and oxidation resistance.
| Element | Content (%) |
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.25 – 1.00 |
| Chromium (Cr) | 8.00 – 10.00 |
| Molybdenum (Mo) | 0.90 – 1.10 |
The key to its performance is the high Chromium content, which offers resistance to oxidation and corrosion, combined with Molybdenum for enhanced creep strength at elevated temperatures.
(2) Mechanical Properties
The minimum mechanical properties required by the standard are as follows:
| Property | Value |
| Tensile Strength (min) | 415 MPa |
| Yield Strength (min) | 205 MPa |
| Elongation (min) | 30% (for longitudinal specimens) |
2. Outer Fin: Integral 11Cr Solid Alloy Steel Fins
The outer spiral solid fins are produced from 11-13% chromium ferritic alloy strip, a cost-effective high-temperature corrosion-resistant material optimized for boiler flue gas and furnace waste gas conditions. Compared with regular carbon steel fins and 304 stainless steel fins, 11Cr fins achieve perfect thermal expansion matching with P9 alloy base tubes, which drastically reduces alternating thermal stress at the fin-tube welding joint during frequent temperature changes.
Powerful resistance against high-temperature oxidation, sulfidation corrosion and fly ash abrasion from boiler exhaust gas
No fin warping or root peeling after years of continuous operation in harsh flue gas environments
Balanced cost and service life, more economical than full stainless steel finned tubes while retaining reliable anti-corrosion performance
3. Key Product Advantages Over Ordinary Fin Tubes
4. Typical Industrial Application Scenarios
This composite solid finned tube is widely deployed in heavy-duty thermal equipment requiring both high pressure resistance and flue gas corrosion resistance:
Why Choose Our ASTM A335 P9 Solid Finned Tubes?
Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
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