ASTM A335 P22 Alloy Steel Seamless Serrated Fin Tube For Power Plants

ASTM A335 P22 Serrated Fin Tube

I. Product Overview

ASTM A335 P22 serrated fin tubes are manufactured from P22 chromium-molybdenum alloy steel, a material specifically designed for high-temperature and high-pressure service. With a nominal composition of 2.25% chromium and 1% molybdenum, this grade provides excellent resistance to oxidation, creep, and sulfur attack at elevated temperatures. The tube utilizes a seamless base pipe combined with helically wound, serrated (notched) fins that are securely attached through high-frequency welding or an embedded process. The serrated fin design significantly increases turbulence and disrupts boundary layers, enhancing heat transfer efficiency compared to plain fins. This construction maintains robust pressure integrity while offering superior thermal performance in demanding environments. Suitable for high-temperature heat exchangers, boilers, heaters, and other critical pressure equipment, it can be supplied in custom dimensions and fin configurations to meet specific project requirements.

II. Chemical & Mechanical Properties

Base Tube Chemical Composition (%)

Mechanical Properties (Base Tube)

III. Equivalent Material of P22

IV. Comparison: P22 vs P11 & P5 Alloy Steels

V. Key Applications

● Power Generation Boilers: Superheater and reheater tubes, economizer sections, and high-pressure steam lines in coal-fired and thermal power plants.

● Petrochemical & Refinery Heaters: Process heater coils, convection and radiant sections in crude, vacuum, and reformer heaters.

● Heat Recovery Steam Generators (HRSG): Evaporator and superheater coils in gas turbine co mbined-cycle units.

● High-Temperature Heat Exchangers: Waste heat recovery units, air preheaters, and process gas coolers in chemical and metallurgical industries.

● Industrial Boilers & Steam Systems: High-pressure steam coils, boiler bank tubes, and steam distribution piping in pulp/paper, textile, and food processing plants.

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.