P22 is the steel grade in ASTM A335 alloy seamless steel pipe standard. P22 is 2.25cr-mo high temperature ferritic steel for boiler and superheater.

The thermal strength of ASTM A335 P22 steel is relatively high, and its creep rupture strength and allowable stress at the same temperature (temperature ≤ 580 ℃) are even higher than that of 9Cr Mo steel, and it has good processability and weldability, and good durable plasticity. Therefore, it has been widely used in the harsh working environment, such as in thermal power, nuclear power and some hydrogen equipment, such as various heating pipe belts and high-pressure vessels. ASTM A335 P22 steel has been widely used in the United States, Japan and Europe. ASTM A335 P22 steel is a mature steel with stable performance and good process performance.

Applications of ASTM A335 P22 Alloy Steel Seamless Pipes

The exceptionally high-temperature strength, creep resistance, and corrosion resistance of ASTM A335 P22 seamless pipes make them indispensable in a wide array of demanding industrial applications. These high-pressure pipe solutions are particularly suited for environments involving elevated temperatures and pressures. Key applications include:

• Power Generation: Widely used in thermal and nuclear power plants for steam lines, headers, and Boiler tube P22 applications, where high temperatures and pressures are encountered.
• Petrochemical and Chemical Processing: Critical for transporting high-temperature and corrosive fluids in refineries, chemical plants, and processing units.
• Oil and Gas Industry: Essential for off-shore oil drilling companies, gas processing facilities, and pipelines transporting heated hydrocarbons.
• Heat Exchangers and Condensers: Employed in heat transfer systems where excellent thermal stability and corrosion resistance are required.
• Pulp and Paper Industry: Used in various high-temperature processes within paper mills.
• Pharmaceutical Equipment: Utilized in processes requiring sterility and resistance to chemical interactions at elevated temperatures.
• Specialty Chemical Industries: For handling aggressive chemicals and processes at high temperatures.
• Sea Water Equipment: Selected for certain components due to its enhanced corrosion resistance.

ASTM A335 P22 Seamless Ferritic Alloy-Steel Pipe Quick Details

• Manufacture: Seamless process, hot-finished or Cold-finished
• Wall thickness (WT): 2.1 mm—20 mm.
• Outer diameter (OD): 21 mm—509 mm
• Length: 6M or specified length as required.
• Ends: Plain End, Beveled End, Threaded

ASTM A335 P22 Pipe Equivalent Materials & Standards