Chrome Moly Piping For Superior Corrosion And Creep Resistance
Astm a335 p22 seamless ferritic alloy steel pipe offers excellent corrosion resistance and creep strength, ideal for high-temperature boiler pipeline protection in power plants and petrochemical industries.
Chrome Moly Piping For Superior Corrosion And Creep Resistance
Astm a335 p22 seamless ferritic alloy steel pipe offers excellent corrosion resistance and creep strength, ideal for high-temperature boiler pipeline protection in power plants and petrochemical industries.
ASTM A335 P22 Alloy Steel Pipe is a seamless ferritic alloy steel pipe designed for high-temperature service, offering excellent corrosion resistance and thermal stability. Complying with ASTM A335/ASME SA335 standards, this Chrome Moly Pipe contains 1.90–2.60% chromium and 0.87–1.13% molybdenum, making it ideal for applications in power plants, refineries, and petrochemical industries.
The ASTM A335 P22 Pipe is manufactured through hot-rolling or cold-drawing processes, followed by appropriate heat treatment to achieve optimal mechanical properties. Its high chromium content enhances oxidation resistance and high-temperature strength, while molybdenum improves hardenability and resistance to wear, making it suitable for boiler pipeline protection.
Available in sizes from 1/2” to 24” (DN15 to DN600), with wall thicknesses ranging from SCH 40 to SCH 160, and lengths up to 12 meters or customized, it meets diverse project requirements. The pipe is designed for bending, flanging, and fusion welding, with recommended preheating and post-weld heat treatment to ensure weld integrity and prevent cracking.
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 and yield strength of 205 MPa, the pipe offers strong resistance to rupturing at high temperatures (up to 650°C) and pressures.
Surface treatments such as varnishing, 3LPE, or FBE coatings further enhance durability, and plain or beveled ends facilitate easy installation. 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.
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.
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