EN 10216-4 P265NL Alloy Steel Seamless Pipes For Specified Low Temperature Properties
EN 10216-4 P215NL P255QL P265NL 26CrMo4-2 12Ni14 Seamless Steel Tube
Alloy Steel Tubes for Specified Low Temperature Properties
Introduction
EN 10216-4 is a European standard that specifies the technical delivery conditions for seamless steel tubes used in high-pressure applications, particularly at low temperatures. This standard covers various steel grades, including P215NL, P255QL, P265NL, 26CrMo4-2, and 12Ni14, which are designed to maintain their mechanical properties even in extreme conditions.
Material Specification
The materials specified under EN 10216-4 are designed for use in environments where low temperatures can significantly affect the performance of steel. These materials are often used in the oil and gas industry, cryogenic applications, and other sectors requiring high toughness and ductility at low temperatures.
Key Features
- Seamless Construction: Provides uniformity and strength.
- Low Temperature Resistance: Maintains mechanical properties at low temperatures.
- High Toughness: Essential for applications in harsh environments.
- Weldability: Suitable for various welding processes.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Mo (%) | Ni (%) |
|---|---|---|---|---|---|---|---|---|
| P215NL | 0.12 | 0.25 | 1.20 | 0.025 | 0.015 | 0.30 | - | - |
| P255QL | 0.12 | 0.25 | 1.20 | 0.025 | 0.015 | 0.30 | 0.10 | - |
| P265NL | 0.12 | 0.25 | 1.20 | 0.025 | 0.015 | 0.30 | 0.10 | - |
| 26CrMo4-2 | 0.24 | 0.30 | 0.60 | 0.025 | 0.015 | 1.00 | 0.15 | - |
| 12Ni14 | 0.10 | 0.20 | 0.50 | 0.025 | 0.015 | 0.10 | - | 1.20 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Energy (J) |
|---|---|---|---|---|
| P215NL | 215 | 360-510 | 22 | - |
| P255QL | 255 | 400-550 | 20 | - |
| P265NL | 265 | 410-570 | 19 | - |
| 26CrMo4-2 | 400 | 600-800 | 20 | - |
| 12Ni14 | 300 | 450-600 | 25 | - |
Steel Grade
The steel grades covered under EN 10216-4 are specifically designed for low-temperature applications. Each grade has unique properties that make it suitable for different applications, ensuring safety and reliability in extreme conditions.
Application
These seamless steel tubes are widely used in:
- Oil and Gas Industry: For pipelines and pressure vessels.
- Cryogenic Applications: In the transport and storage of liquefied gases.
- Power Generation: In components that operate under low temperatures.
- Chemical Processing: For equipment that requires high toughness at low temperatures.
Possible Alternative Grades
While the specified grades are tailored for low-temperature applications, alternative grades may also be considered based on specific requirements:
- ASTM A335 P11/P22: For high-temperature applications.
- ASTM A106 Gr. B: For general-purpose piping.
- API 5L X42/X52: For pipeline applications.
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