ASTM A335 P22 SEAMLESS PIPES

ASTM A335 P22 SEAMLESS PIPES

ASTM A335 P22 Seamless Pipes are high-temperature chromium-molybdenum alloy steel pipes manufactured in accordance with ASTM A335 / ASME SA335 standards. These pipes are specially designed for high-pressure and elevated temperature service in power plants, refineries, petrochemical industries, and other critical process applications.

Grade P22 is a 2.25% Chromium – 1% Molybdenum (Cr-Mo) alloy steel that provides excellent high-temperature strength, creep resistance, and oxidation resistance. The seamless manufacturing process ensures uniform grain structure, superior pressure handling capability, and enhanced reliability under extreme operating conditions.

Specifications

Standard	ASTM A335 / ASME SA335
Grade	P22
Material Type	Alloy Steel (2.25Cr – 1Mo)
Manufacturing Process	Seamless (Hot Finished / Cold Drawn)
Size Range	1/2" NB to 24" NB (Custom Sizes Available)
Wall Thickness	Schedule 20 to Schedule XXS
Length	Single Random / Double Random / Cut Length / Custom Length
End Type	Plain End (PE), Beveled End (BE)
Surface Finish	Black Painted / Shot Blasted / Pickled & Oiled

Key Benefits

• Excellent High-Temperature Strength: Maintains mechanical properties under elevated temperatures.
• Superior Creep Resistance: Ideal for long-term exposure to high heat and pressure.
• Enhanced Oxidation & Scaling Resistance: Chromium improves resistance to corrosion at high temperatures.
• High Pressure Handling Capability: Suitable for steam lines and critical process piping.
• Seamless Construction: Eliminates weld joints, reducing risk of failure.
• Long Service Life: Reliable performance in demanding industrial environments.

Chemical Composition (Typical)

Element	Composition (%)
Carbon (C)	0.05 – 0.15
Chromium (Cr)	1.90 – 2.60
Molybdenum (Mo)	0.87 – 1.13
Manganese (Mn)	0.30 – 0.60
Silicon (Si)	0.50 Max

Applications

• Power Plant Boilers & Superheaters
• High-Pressure Steam Piping Systems
• Petrochemical Processing Plants
• Oil & Gas Refineries
• Heat Exchangers
• Pressure Vessels

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Radiographic Testing (RT)
• Hardness & Tensile Testing
• Positive Material Identification (PMI)
• Dimensional & Visual Inspection

Conclusion

ASTM A335 P22 Seamless Pipes deliver outstanding high-temperature performance, pressure resistance, and long-term durability. With their 2.25Cr–1Mo alloy composition and seamless construction, these pipes are widely trusted for critical applications in power generation, refining, and petrochemical industries where safety and reliability are essential.