ASTM A335 P22 Pipe
High-temperature Service
Astm a335 p22 pipe offers excellent corrosion resistance and creep strength, ideal for boiler pipeline protection in power plants and petrochemical industries.
High-temperature Service
Astm a335 p22 pipe offers excellent corrosion resistance and creep strength, ideal for boiler pipeline protection in power plants and petrochemical industries.
ASTM A335 P22 Pipe is a seamless ferritic alloy steel pipe designed for high-temperature service, providing superior corrosion resistance and creep resistance. Conforming to the ASTM A335/ASME SA335 specification, this Chrome Moly Pipe contains 1.90-2.60% chromium and 0.87-1.13% molybdenum, making it suitable for demanding applications in power generation, petrochemical plants, refineries, and other industrial piping systems. Its seamless construction ensures durability and reliability under high-pressure and high-temperature conditions.
The ASTM A335 P22 Pipe is produced through hot-rolling or cold-drawing processes, followed by heat treatment such as full or isothermal annealing, normalizing, and tempering, or subcritical annealing to achieve optimal mechanical properties. The chromium content enhances oxidation resistance and high-temperature strength, while molybdenum improves hardenability, creep resistance, and wear resistance, making it ideal for boiler pipeline protection. The pipe is suitable for bending, flanging, and fusion welding, with recommended preheating (120-200°C) and post-weld heat treatment (PWHT at 650-760°C) for thicknesses above 13 mm to ensure weld integrity and prevent cracking. Available in sizes from 1/8” to 48” (DN6 to DN1200), with wall thicknesses from SCH 10 to SCH XXS, and lengths up to 12 meters or customized, it meets diverse project requirements.
The Seamless Alloy Pipes undergo rigorous testing, including tensile, flattening, hardness, and hydrostatic tests, to ensure compliance with ASTM A335 standards. With a minimum tensile strength of 415 MPa, yield strength of 205 MPa, and elongation of 30% (longitudinal) or 20% (transverse), the pipe offers robust resistance to high temperatures (up to 610-650°C) and pressures. Its corrosion resistance makes it suitable for handling corrosive fluids and gases in petrochemical applications, while its abrasion-resistant properties support the transport of abrasive materials like ash or slurries in pneumatic conveying systems. Surface treatments such as black painting, anti-corrosion oil, or galvanized finishes enhance durability, and plain or beveled ends facilitate easy installation.
Compared to grades like P5 or P11, the ASTM A335 P22 Pipe is particularly suited for power industry and petrochemical applications due to its balanced chromium-molybdenum composition, offering a cost-effective solution with excellent performance in high-temperature environments. Its ability to resist hydrogen sulfide corrosion and stress cracking makes it a preferred choice for oil and gas pipelines. The pipe’s versatility also extends to manufacturing pipe fittings like elbows, tees, and reducers under ASTM A234 WP22 standards, ensuring compatibility with complex piping systems.
The ASTM A335 P22 Pipe addresses critical challenges like pipeline wear, corrosion, and thermal stress in high-throughput industrial systems. Its balanced alloy composition and seamless construction make it a reliable choice for engineers seeking durable industrial piping solutions for extreme environments. Whether used in high-temperature boiler systems or corrosive petrochemical applications, this Chrome Moly Pipe delivers unmatched performance, safety, and longevity.
Operates reliably at temperatures up to 600°C, suitable for boilers, headers, and superheaters.
Chromium and molybdenum improve resistance against oxidation, scaling, and chemical attack.
Ferritic-martensitic structure provides excellent strength under high-pressure conditions.
Compatible with common welding techniques, ensuring easy field fabrication and repairs.
Sustains performance over extended exposure to elevated temperatures and thermal cycling.
Balance of performance and affordability makes P22 ideal for long-term industrial use.
The ASTM A335 P22 is manufactured from a high-quality alloy steel that offers excellent mechanical properties and resistance to high temperatures. Below are the details of its chemical composition and mechanical properties.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.05-0.15 |
| Manganese (Mn) | 0.30-0.60 |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.025 |
| Silicon (Si) | ≤0.50 |
| Chromium (Cr) | 1.90-2.60 |
| Molybdenum (Mo) | 0.87-1.13 |
| Property | Value |
|---|---|
| Tensile Strength, min (MPa) | 415 |
| Yield Strength, min (MPa) | 205 |
| Elongation, min (%) | 30 (Longitudinal), 20 (Transverse) |
| Hardness, max (HBW) | 250 |
ASTM A335 P22 pipes are designed for high-temperature and high-pressure applications, offering a range of benefits that make them ideal for various industrial uses.
Ideal for operations up to 650°C, making it suitable for boilers and pressure vessels in high-temperature environments.
Chromium and molybdenum content provides excellent tensile and yield strength, allowing for reduced wall thickness.
Resists deformation over time under high pressure and temperature, ensuring long-term performance.
Chromium resists oxidation; molybdenum improves resistance to corrosive steam and sulfur-containing environments.
Supports standard welding and fabrication processes, allowing easy installation and maintenance.
Extended service life and reduced maintenance needs offer excellent value over time in industrial applications.
ASTM A335 P22 pipes are widely used in various industries due to their excellent high-temperature and
high-pressure performance.
Here are some key applications:
Utilized in boilers, superheaters, and reheaters within steam power plants due to their high-temperature resistance and durability.
Employed in refineries and chemical plants for transporting high-temperature fluids and gases, ensuring safety and efficiency.
Ideal for use in heat exchangers where thermal stability and corrosion resistance are critical under fluctuating temperatures.
Commonly used in high-pressure boilers and superheaters, offering excellent performance under extreme thermal conditions.
Applied in the extraction and processing of oil and gas, handling high-pressure and high-temperature fluids effectively.
Suitable for equipment in chemical industries where resistance to corrosive substances and high temperatures is essential.
Astm a335 p5 alloy steel pipe provides excellent h...
Astm a335 p11 alloy steel pipe provides reliable h...
Astm a335 p92 high pressure boiler pipe delivers e...
