Alloy Steel Seamless Pipe
ASTM A335 / A213 Series
Engineered with chromium, molybdenum, nickel and other alloying elements, this alloy steel pipe series delivers reliable high-temperature strength, pressure resistance and long-term stability for power generation, petrochemical, boiler and heavy industrial systems.
This alloy steel pipe series is manufactured through controlled melting, hot rolling or cold drawing, followed by precision heat treatment such as normalizing, tempering, quenching and tempering. With strict chemical composition control and full-process inspection, the pipes provide stable strength, creep resistance and oxidation resistance under demanding operating conditions.
High-Temperature Strength
Maintains mechanical stability and oxidation resistance in elevated-temperature service.
Long-Term Creep Resistance
Designed for boiler tubes, superheaters and pressure systems with continuous duty cycles.
Seamless Structure
No welded seam, uniform pressure bearing capacity and reliable performance in high-pressure piping.
Strict Heat Treatment
Normalized, tempered or quenched-and-tempered conditions available for stable properties.
Wide Grade Coverage
Available in Cr-Mo, Cr-Mo-V and high-pressure boiler grades for global projects.
Complete Quality Control
Hydrostatic testing, UT, ET, MT, PMI and mechanical testing can be supplied as required.
| Grade | Standard | OD (mm) | WT (mm) | Tensile Strength | Typical Service |
|---|---|---|---|---|---|
| P11 / T11 | ASTM A335 / A213 | 21.3 – 508 | 2.0 – 60 | ≥ 415 MPa | Boiler and heater tubes |
| P22 / T22 | ASTM A335 / A213 | 21.3 – 610 | 2.0 – 80 | ≥ 415 MPa | High-temperature pressure piping |
| P91 / T91 | ASTM A335 / A213 | 21.3 – 508 | 2.5 – 80 | ≥ 585 MPa | Power plant superheaters |
| 15CrMo | GB/T 5310 | 25 – 508 | 3.0 – 60 | ≥ 440 MPa | High-pressure boiler systems |
| 12Cr1MoV | GB/T 5310 | 25 – 508 | 3.0 – 70 | ≥ 470 MPa | Steam piping and headers |
| 13CrMo4-5 | EN 10216-2 | 21.3 – 610 | 2.0 – 80 | ≥ 440 MPa | Pressure equipment |
Petrochemical Processing
Refinery piping, furnace tubes, heat exchangers and process pipelines.
Power Generation
Superheaters, reheaters, steam headers and high-temperature pressure lines.
Boiler Manufacturing
High-pressure boiler tubes, economizer tubes and water-wall systems.
Oil and Gas Systems
Transmission lines, high-pressure service piping and equipment connections.
Mechanical Engineering
Heavy-duty structural components, pressure vessels and precision machinery.
Energy Infrastructure
Thermal power, waste heat recovery, nuclear auxiliary systems and industrial utilities.
Need a custom size, specific alloy grade or project-based procurement plan?
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