Alloy Steel Pipe For High-temperature And High-pressure Applications
Astm a335 p22 alloy steel pipe is designed for high-temperature service with excellent creep resistance, corrosion resistance, and durability in power generation and petrochemical industries.
Alloy Steel Pipe For High-temperature And High-pressure Applications
Astm a335 p22 alloy steel pipe is designed for high-temperature service with excellent creep resistance, corrosion resistance, and durability in power generation and petrochemical industries.
ASTM A335 P22 Seamless Pipe is a high-performance alloy steel pipe engineered for superior high-temperature strength, creep resistance, and corrosion resistance in demanding applications. Conforming to the ASTM A335/ASME SA335 specification, this Chrome Moly Pipe is designed with a composition of 1.90-2.60% chromium and 0.87-1.13% molybdenum, making it ideal for boiler pipeline protection in power plants, refineries, petrochemical plants, and other industrial piping systems. Its seamless construction ensures exceptional durability and reliability under high-pressure and high-temperature conditions up to 600°C.
The ASTM A335 P22 Seamless Pipe is manufactured through hot-rolling or cold-drawing processes, followed by heat treatments such as normalizing at 900-930°C and tempering at 720-760°C to optimize mechanical properties. The high chromium content enhances oxidation resistance and high-temperature strength, while molybdenum improves creep resistance, hardenability, and wear resistance, making it suitable for boiler pipeline protection. Available in sizes from 1/8” to 36” (NPS 1/8 to NPS 36, DN6 to DN900), with wall thicknesses ranging from SCH 20 to XXS, and lengths up to 13.5 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 and yield strength of 205 MPa, the P22 pipe offers robust resistance to thermal stress and pressure, making it ideal for handling corrosive fluids and gases in petrochemical and power generation applications. Surface treatments such as galvanizing, FBE, or 3LPE coatings further enhance corrosion resistance, while plain or beveled ends facilitate seamless integration into industrial piping systems.
Compared to other grades like P5 or P91, the ASTM A335 P22 Seamless Pipe offers a balanced combination of high-temperature performance and cost-effectiveness, making it a preferred choice for power plants and refinery applications. Its compatibility with fittings and flanges under ASTM A234 WP22 standards ensures seamless integration into complex piping networks. The pipe’s ability to resist hydrogen sulfide corrosion and stress corrosion cracking makes it ideal for oil and gas pipelines and high-pressure industrial piping systems requiring reliable boiler pipeline protection.
Engineered to address critical challenges like pipeline wear, corrosion, and thermal stress, the ASTM A335 P22 Seamless Pipe delivers unmatched performance in high-throughput industrial systems. Its advanced alloy composition and seamless construction make it a reliable choice for engineers seeking durable industrial piping solutions for extreme environments, ensuring safety, longevity, and efficiency in Chrome Moly Pipe applications.
| Specification | Grade | Outer Diameter (mm) | Wall Thickness (mm) | Quantity (pcs) | Weight (tons) | Length (m) |
|---|---|---|---|---|---|---|
| ASME / ASTM | 10CrMo910 / T22 / P22 | 16.00 | 3.00 | 168 | 1.301 | 8–12 |
| ASME / ASTM | 10CrMo910 / T22 / P22 | 19.00 | 2.00 | 81 | 0.498 | 6–8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 21.30 | 5.00 | 72 | 1.144 | 6-9 |
| ASME / ASTM | 10CrMo910/T22/P22 | 25.00 | 2.00 | 136 | 1.242 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 26.30 | 5.60 | 121 | 2.884 | 6-9 |
| ASME / ASTM | 10CrMo910/T22/P22 | 27.00 | 7.00 | 89 | 2.475 | 7.5 |
| ASME / ASTM | 10CrMo910/T22/P22 | 33.40 | 5.00 | 76 | 2.113 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 34.00 | 0.00 | 96 | 2.874 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 38.00 | 4.50 | 2.515 | 1.04 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 38.00 | 6.00 | 85 | 3.241 | 6.5-8.5 |
| ASME / ASTM | 10CrMo910/T22/P22 | 42.00 | 5.00 | 130 | 4.776 | 8-12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 42.00 | 5.50 | 89 | 3.594 | 8-12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 42.00 | 6.00 | 76 | 3.26 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 42.00 | 7.50 | 92 | 5.427 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 42.00 | 9.00 | 79 | 4.662 | 10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 44.50 | 6.50 | 116 | 5.967 | 10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 44.50 | 7.00 | 80 | 4.115 | 10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 44.50 | 7.50 | 233 | 12.843 | 12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 45.00 | 4.00 | 65 | 2.117 | 10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 45.00 | 10.00 | 92 | 6.932 | 9 |
| ASME / ASTM | 10CrMo910/T22/P22 | 48.00 | 6.00 | 124 | 6.207 | 9 |
| ASME / ASTM | 10CrMo910/T22/P22 | 48.00 | 14.00 | 121 | 11.448 | 10-12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 48.30 | 7.14 | 87 | 4.959 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 50.80 | 5.60 | 95 | 4.425 | 8-11 |
| ASME / ASTM | 10CrMo910/T22/P22 | 51.00 | 4.50 | 119 | 4.946 | 6-11 |
| ASME / ASTM | 10CrMo910/T22/P22 | 51.00 | 6.50 | 50 | 2.078 | 3.6 |
| ASME / ASTM | 10CrMo910/T22/P22 | 51.00 | 9.00 | 89 | 2.681 | 10-12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 51.00 | 10.00 | 65 | 5.296 | 10-12 |
| ASME / ASTM | 10CrMo910/T22/P22 | 54.00 | 5.00 | 61 | 2.968 | 8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 57.00 | 4.00 | 98 | 4.038 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 57.00 | 6.00 | 84 | 5.105 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 57.00 | 7.50 | 57 | 3.962 | 8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 57.00 | 8.50 | 91 | 8.079 | 8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 60.00 | 4.66 | 136 | 7.429 | 6-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 60.00 | 6.00 | 98 | 6.307 | 6-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 63.00 | 2.56 | 69 | 2.467 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 63.00 | 6.50 | 82 | 4.732 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 63.00 | 7.50 | 59 | 4.878 | 8-10 |
| ASME / ASTM | 10CrMo910/T22/P22 | 66.00 | 4.00 | 114 | 5.615 | 8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 70.00 | 4.00 | 102 | 5.348 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 73.00 | 9.00 | 95 | 10.869 | 6-8 |
| ASME / ASTM | 10CrMo910/T22/P22 | 73.00 | 10.00 | 98 | 11.104 | 8.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 88.90 | 5.60 | 110 | 10.56 | 8.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 133.00 | 14.00 | 12 | 3.971 | 8.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 168.00 | 12.00 | 21 | 7.808 | 6.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 273.00 | 10.00 | 12 | 6.629 | 8.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 273.00 | 14.00 | 10 | 7.202 | 8.4 |
| ASME / ASTM | 10CrMo910/T22/P22 | 273.00 | 30.00 | 2 | 2.892 | 8 |
Both materials are low-alloy steels designed for high-temperature and high-pressure applications, commonly used in power generation and petrochemical industries.
| Property / Feature | 10CrMo910 | ASTM A335 P22 |
|---|---|---|
| Standard | DIN 17175 / EN 10216-2 | ASTM A335 / ASME SA335 |
| Material Type | Low Alloy Steel (Cr-Mo) | Low Alloy Steel (Cr-Mo) |
| Max Operating Temperature | Up to 580°C (1076°F) | Up to 600°C (1112°F) |
| Corrosion Resistance | Good in aggressive media | Excellent in steam & chemical systems |
| Strength | High tensile and yield strength | High tensile and yield strength |
| Weldability | Good (no preheat/post-heat needed) | Good (conventional welding methods) |
| Applications | Boilers, heat exchangers, piping | Steam lines, superheaters, pressure vessels |
| Industries | Power, chemical, oil & gas | Power gen, petrochemical, oil & gas |
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.
| Element | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 0.08–0.14 | ≤ 0.50 | 0.40–0.80 | ≤ 0.020 | ≤ 0.010 | 2.00–2.50 | 0.90–1.10 | ≤ 0.30 | ≤ 0.30 | ≤ 0.012 | ≤ 0.040 |
| Thickness (mm) | Yield Strength Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Elongation A (%) | Impact KV (20°C, J) |
|---|---|---|---|---|
| ≤ 16 | ≥ 310 | 480 – 630 | ≥ 22 | ≥ 40 |
| 16 – 40 | ≥ 300 | 480 – 630 | ≥ 22 | ≥ 40 |
| 40 – 60 | ≥ 290 | 480 – 630 | ≥ 22 | ≥ 40 |
| 60 – 100 | ≥ 280 | 470 – 620 | ≥ 17 | ≥ 27 |
| 100 – 150 | ≥ 265 | 460 – 610 | ≥ 17 | ≥ 27 |
| 150 – 250 | ≥ 250 | 450 – 600 | ≥ 17 | ≥ 27 |
| Temperature (°C) | Rp0.2 (MPa) |
|---|---|
| 100 | 249 |
| 150 | 241 |
| 200 | 234 |
| 250 | 224 |
| 300 | 219 |
| 350 | 212 |
| 400 | 207 |
| 450 | 193 |
| 500 | 180 |
| Property | Value |
|---|---|
| Density | ~7.85 – 7.93 g/cm³ |
| Thermal Conductivity | ~39 – 73 W/m·K |
| Specific Heat Capacity | ~450 J/kg·K |
| Thermal Expansion Coefficient | ~13 × 10−6/K (20–100 °C) |
| Max Operating Temperature | Up to 600 °C |
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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