ASTM A335 P11 Alloy Steel Seamless Pipe, Serrated Fin Tube, With Gr.11 Fin For HRSG System

Product Overview

The ASTM A335 P11 alloy steel seamless pipe with serrated fins and Gr.11 steel fins is designed for Heat Recovery Steam Generator (HRSG) systems. The serrated fin design maximizes heat transfer by inducing turbulence in the flue gas, while the Gr.11 steel fins provide excellent high-temperature and corrosion resistance. This tube is specifically suited for HRSG convection sections, where efficient heat recovery from flue gases is critical.

Chemical Composition

▶ Base Tube – ASTM A335 P11 (Alloy Steel)

▶ Fin Material – Gr.11 Steel

(Usually the same material as the base tube or similar high-temperature alloys)

Mechanical Properties

Key Advantages

• Enhanced Heat Transfer
  Serrated fin design induces turbulence, significantly improving heat transfer efficiency by increasing the surface area and breaking the thermal boundary layer.

• High-Temperature Resistance
  The Gr.11 steel fins and ASTM A335 P11 base pipe are designed for high-pressure, high-temperature applications, making them ideal for HRSG systems.

• Corrosion Resistance
  Gr.11 material provides superior oxidation and corrosion resistance under continuous high-heat conditions, ensuring long-lasting performance in the harsh HRSG environment.

• Efficient Heat Recovery
  Perfect for HRSG systems where heat recovery from exhaust gases needs to be maximized before flue gases exit the system.

• Durability in Harsh Environments
  The alloy steel base and high-temperature steel fins offer strong mechanical strength and resistance to thermal fatigue.

Applications

Primarily used in the convection sections of HRSGs for:

• Fired Heaters and Boilers

• Steam Generators in combined-cycle power plants

• Waste Heat Recovery Units (WHRU)

• Economizers and Superheaters

These tubes are essential in waste heat recovery systems where heat needs to be extracted from exhaust gases and used to generate steam or preheat other fluids.

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.