EN 10208-2 L245NB Gas Steel Pipe Alloy Seamless Steel Pipe For Combustible Fluids
EN 10208-2 L245NB L290NB L360NB L415NB L360QB Gas Steel Pipe Alloy Seamless Steel Pipe for Combustible Fluids
Material
EN 10208-2 specifies the technical delivery conditions for seamless and welded steel pipes used for the conveyance of combustible fluids. The pipes are manufactured from alloy steel, which provides enhanced mechanical properties and resistance to high temperatures and pressures.
Specification
The pipes are categorized based on their nominal diameter and wall thickness, ensuring they meet specific requirements for pressure and temperature ratings. The standard outlines the necessary testing and inspection procedures to ensure quality and safety.
Key Features
- Seamless Construction: Provides uniform strength and eliminates the risk of weld defects.
- High Strength: Suitable for high-pressure applications.
- Corrosion Resistance: Enhanced resistance to corrosive environments.
- Manufacturing: Tight tolerances for dimensional accuracy.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | V (%) |
|---|---|---|---|---|---|---|---|---|---|
| L245NB | 0.20 | 0.55 | 1.60 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 | - |
| L290NB | 0.20 | 0.55 | 1.60 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 | - |
| L360NB | 0.20 | 0.55 | 1.60 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 | - |
| L415NB | 0.20 | 0.55 | 1.60 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 | - |
| L360QB | 0.20 | 0.55 | 1.60 | 0.025 | 0.015 | 0.30 | 0.30 | 0.10 | - |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Toughness (J) |
|---|---|---|---|---|
| L245NB | 245 | 360-510 | 22 | 27 |
| L290NB | 290 | 410-550 | 22 | 27 |
| L360NB | 360 | 490-620 | 22 | 27 |
| L415NB | 415 | 510-640 | 22 | 27 |
| L360QB | 360 | 490-620 | 22 | 27 |
Steel Grade
The steel grades covered under EN 10208-2 include L245NB, L290NB, L360NB, L415NB, and L360QB. Each grade is designed to meet specific mechanical and chemical property requirements suitable for various applications.
Application
These pipes are primarily used in the oil and gas industry for the transportation of combustible fluids, including natural gas, crude oil, and other hydrocarbons. Their high strength and resistance to pressure make them ideal for high-demand environments.
Possible Alternative Grades
While EN 10208-2 grades are widely used, alternative grades may include:
- API 5L X42, X52, X60
- ASTM A106 Grade B
- ASTM A53 Grade B
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