Serrated Finned Tube HF Welding ASTM A335 P9 For Power Generation Boilers

Serrated Finned Tube HF Welding ASTM A335 P9 For Power Generation & Boilers​

Chemical Composition (%)

Mechanical Properties

ASTM A335 this standard specification for seamless ferritic alloy-steel pipe for high-temperature service, is a critical material standard for fin tubes used in high-temperature and high-pressure applications, such as power plants, petrochemical refineries, and heat recovery systems.

P9 material has good oxidation & corrosion resistance and better than P11/P22. With excellent high-temperature strength (up to 600°C+) and superior creep resistance for long-term thermal cycling, P9 material is suitable for welding & fabrication (requires post-weld heat treatment).

Design Features Serrated Finned Tubes

Serrated Fins:The fins are serrated, increasing turbulence & heat transfer efficiency by ~20-30% vs. smooth fins and reduces ash fouling in flue gas applications.

Material:Usually carbon steel, stainless steel, alloy or copper, providing durability and resistance to corrosion.

Spiral Configuration:Enhance the heat transfer process.

Welding Process:High-FrequencyResistance Welding ensures strong metallurgical bonding.Post-Weld Heat Treatment (PWHT) required to relieve stresses.

Primary Application

Power plant superheaters

Refinery heaters & reformers

HVAC Systems

Waste heat recovery systems

Specifications For Various Types Of Finned Tubes We Can Do

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.