ASME SA335 P9 Alloy Steel HFW Solid Finned Tube With Carbon Fin For Heat Exchangers

1.What is ASME SA335 P9 Alloy Steel HFW Solid Finned Tube with Carbon Fin?

ASME SA335 P9 HFW Solid Finned Tube with Carbon Fin is a high-temperature solution engineered for sulfur-rich environments. It combines a seamless chromium-molybdenum alloy steel base tube (ASME SA335 P9) with helically wound solid carbon steel fins bonded via high-frequency welding (HFW). This robust design delivers exceptional resistance to sulfidation and oxidation up to 600°C (1,112°F), making it ideal for refinery heaters, coker units, and high-sulfur flue gas applications.

2.Chemical & Mechanical Properties

Dimensional Specifications:

Chemical Composition (%)

Mechanical Properties

3.Key Applications

· Refinery Heaters: Convection sections in crude/vacuum distillation units.

· Delayed Cokers: Transfer line exchangers handling 500°C+ vapors.

· Coal-Fired Plants: Economizers for high-sulfur flue gas (SO₂ > 3,000 ppm).

· Chemical Processing: Sulfuric acid regeneration heaters.

· Petrochemical: Hydrogen reformer effluent boilers.

4.Why Choose ASME SA335 P9 Alloy Steel HFW Solid Finned Tube :

A:Company Competitiveness:

Yuhong Holding Group has more than 35 years experience for steel pipe and tube , fin tube , main application for Petrochemical , Oil refinary, Furnace, heating, boiler, heat exchanger, air cooler,.., till now YUHONG brand products already exported more than 85 countries, which like UK, ITALY, SPAIN , USA, MEXICO , COLOMBIA , BRAZIL, SAUDI ARANBIA , OMAN, QATAR, U.A.E, KOREA, ...., YUHONG brand already won good reputation in the market.

B:Product Competitiveness:

· 5X Sulfidation Life: Outperforms carbon steel tubes per API RP939-C.
· Zero Fin Detachment: HFW ensures >120 MPa bond strength (AWS D17.1).
· Cost Efficiency: Carbon steel fins reduce cost by 40% vs. alloy fins.
· Rapid Delivery: 30% stock coverage for standard sizes (OD 19–102mm).

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.   The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

Our factories main products as below : 
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

Factory 2th: Carbon steel seamless tube, Alloy steel seamless tube; Enhanced Heat Tranfer Tube, low fin tube ,U bending workshop;
Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube,  KL type fin tube), Embedded G type fin tube , Extruded fin tube,  low fin tube, U bend & 180deg. Return;

Yuhong Holding Group also has gained rich experience for project package( products contain:Pipes, Fittings, Flanges, heat exchanger, furnace, fired heater, air cooler, boiler) , YUHONG brand has marked its global presence in more than 85 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand, Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine, Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy, Gernmany, Poland, Spain,... We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers as stockists around the world.