API 5L Seamless Carbon Steel Line Pipe / Tubes:
API 5L pipes are manufactured in accordance with the American Petroleum Institute's Specification 5L, which sets forth the requirements for seamless and welded steel line pipe used in the conveyance of gas, water, and oil in the oil and natural gas industries. These pipes are available in various grades, including but not limited to A25, A, B, X42, X46, X52, X56, X60, X65, X70, and X80, with each grade reflecting different levels of minimum yield strength and chemical composition.
Key Features of API 5L Seamless Carbon Steel Line Pipe / Tubes:
- Seamless Construction: API 5L pipes are seamless, providing a continuous material structure that enhances their resistance to pressure and stress.
- High-Strength Grades: The 'X' grades (e.g., X42, X56, X60) offer higher strength levels, making them suitable for high-pressure applications.
- Chemical Composition: The pipes are made from carbon steel with varying amounts of alloying elements such as manganese, phosphorus, sulfur, and trace amounts of niobium, vanadium, and titanium to enhance their properties.
- Mechanical Properties: They exhibit a range of mechanical properties, including tensile strength and yield point, which are critical for structural integrity under pressure.
- Threaded and Plain Ends: API 5L pipes can be supplied with threaded or plain ends, depending on the method of connection required.
Applications of API 5L Seamless Carbon Steel Line Pipe / Tubes:
- Oil and Gas Transmission: Used extensively in onshore and offshore pipelines for the transportation of oil and natural gas.
- Refineries and Petrochemical Plants: Employed in various applications within refineries and petrochemical plants for fluid transport.
- Water Supply Systems: Suitable for high-pressure water supply systems, including those in urban infrastructure and industrial settings.
- Gas Distribution Networks: Utilized in the construction of gas distribution networks for residential and commercial areas.
- Structural Applications: The pipes can also be used in structural applications where high strength and durability are required.
Tolerance on Dimensions
Standard | Out Diameter | Wall Thickness |
API 5L | Tolerance | Tolerance |
D<60.3 | +0.41mm, -0.80mm | +15.0%, -12.5% |
D≥60.3 | +0.75%D, -0.75%D | +15.0%, -12.5% |
Standard
Standard | Grade | Chemical Components (%) | Mechanical Properties |
C | Si | Mn | P | S | Tensile STrength(Mpa) | Yield STrength(Mpa) |
API 5L PSL1 | A | 0.22 | - | 0.90 | 0.030 | 0.030 | ≥331 | ≥207 |
B | 0.28 | - | 1.20 | 0.030 | 0.030 | ≥414 | ≥241 |
X42 | 0.28 | - | 1.30 | 0.030 | 0.030 | ≥414 | ≥290 |
X46 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥434 | ≥317 |
X52 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥455 | ≥359 |
X56 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥490 | ≥386 |
X60 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥517 | ≥448 |
X65 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥531 | ≥448 |
X70 | 0.28 | - | 1.40 | 0.030 | 0.030 | ≥565 | ≥483 |
API 5L PSL2 | B | 0.24 | - | 1.20 | 0.025 | 0.015 | ≥414 | ≥241 |
X42 | 0.24 | - | 1.30 | 0.025 | 0.015 | ≥414 | ≥290 |
X46 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥434 | ≥317 |
X52 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥455 | ≥359 |
X56 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥490 | ≥386 |
X60 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥517 | ≥414 |
X65 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥531 | ≥448 |
X70 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥565 | ≥483 |
X80 | 0.24 | - | 1.40 | 0.025 | 0.015 | ≥621 | ≥552 |


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