Steel Round Pipe API 5L
API 5L round steel pipe is a carbon steel line pipe manufactured in accordance with API 5L standards for the transportation of oil, natural gas, water, and other fluids. It is available in both seamless and welded forms and comes in various grades, such as Grade B, X42, X52, and X65, to meet different pressure and strength requirements. Due to its reliable mechanical properties and strict quality requirements, API 5L pipe is widely used in pipeline, energy, petrochemical, and water transmission projects.
Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of steel round pipe api 5l in China, also supports customized service with low price. Welcome to wholesale discount steel round pipe api 5l for sale here from our factory. Contact us for free sample.
API 5L line pipe supplier：
API 5L steel round pipe is a carbon steel line pipe manufactured in accordance with API Specification 5L and ISO 3183 standards. It is designed for the transportation of oil, natural gas, water, slurry, and other fluids under pressure.
API 5L round pipes are available in both seamless and welded forms and are widely used in onshore pipelines, offshore pipelines, refineries, petrochemical plants, and water transmission systems.
The standard covers multiple steel grades, including Grade B, X42, X52, X60, X65, X70, and X80, allowing engineers to select the appropriate strength level for specific operating conditions.
API 5L Steel Round Pipe Specification
| Item | Details |
|---|---|
| Standard | API Spec 5L / ISO 3183 |
| Product Type | Seamless or Welded Round Pipe |
| Grades | Grade B, X42, X52, X60, X65, X70, X80 |
| PSL Level | PSL1, PSL2 |
| Outside Diameter | 21.3 mm – 1219 mm |
| Wall Thickness | SCH 10 to SCH XXS |
| Length | 6m, 12m, or Custom |
| End Type | Plain End, Beveled End, Threaded |
| Coating | FBE, 3LPE, 3LPP, Black Paint |
| Application | Oil, Gas, Water, Structural Projects |
API 5L Steel Grades Comparison
| Grade | Minimum Yield Strength |
| Grade B | 241 MPa |
| X42 | 290 MPa |
| X52 | 359 MPa |
| X60 | 414 MPa |
| X65 | 448 MPa |
| X70 | 483 MPa |
| X80 | 552 MPa |
Higher-grade pipes provide greater strength and allow higher operating pressures or reduced wall thickness.
PSL1 vs PSL2: Which Should You Choose?
One of the most common questions from buyers is the difference between PSL1 and PSL2.
| Requirement | PSL1 | PSL2 |
| Chemical Composition Control | Standard | More Strict |
| Impact Testing | Not Mandatory | Mandatory |
| Non-Destructive Testing | Limited | Required |
| Traceability | Standard | Enhanced |
| Pipeline Projects | General Service | Critical Service |
For long-distance oil and gas transmission projects, PSL2 is generally preferred because of its stricter quality requirements.
Seamless vs Welded API 5L Round Pipe
| Type | Advantages | Typical Applications |
| Seamless | Higher pressure resistance | Oil and gas transmission, critical pipelines |
| ERW | Lower cost, good dimensional accuracy | Water pipelines, structural applications |
| LSAW | Large diameter capability | Long-distance transmission pipelines |
| SSAW | Cost-effective for large diameters | Water and slurry transportation |
Applications of API 5L Steel Round Pipe
Oil and Gas Pipelines
The most common use of API 5L pipe is the transportation of crude oil and natural gas over long distances.
Water Transmission Systems
API 5L pipes are widely used in municipal and industrial water supply projects.
Offshore and Onshore Pipelines
High-strength grades such as X65 and X70 are commonly selected for offshore oil and gas developments.
Structural and Piling Applications
In some projects, API 5L round pipes are also used as piling pipes and structural supports.
API 5L Pipe Inspection Requirements
To ensure compliance with API 5L, the following inspections are commonly performed:
Chemical Composition Analysis
Tensile Testing
Yield Strength Testing
Hydrostatic Testing
Ultrasonic Testing (UT)
Magnetic Particle Testing (MT)
Visual Inspection
Dimensional Inspection
For PSL2 pipes, additional testing and traceability requirements apply.
How to Select the Right API 5L Steel Round Pipe
Choose Grade B or X42 when:
Budget is important
Pressure requirements are moderate
Water transmission is the primary application
Choose X52 to X65 when:
Long-distance oil and gas transmission is required
Higher pressure resistance is needed
Choose X70 or X80 when:
Maximum pipeline efficiency is required
Large-scale energy infrastructure projects are involved
API 5L Line pipe factory
Need Help Selecting API 5L Pipe?
Send us your project requirements, including operating pressure, temperature, medium, and pipe dimensions.
Our engineering team can recommend:
✓ Suitable API 5L grade
✓ PSL1 or PSL2 requirements
✓ Coating system recommendations
✓ Inspection and testing requirements
✓ Mill Test Certificate (MTC) support
FAQ
What is API 5L steel round pipe used for?
API 5L steel round pipe is primarily used for transporting oil, natural gas, water, and other fluids under pressure.
What is the difference between API 5L PSL1 and PSL2?
PSL2 requires stricter chemical composition control, impact testing, non-destructive testing, and traceability than PSL1.
Is API 5L pipe seamless or welded?
API 5L covers both seamless and welded pipe types, including ERW, LSAW, and SSAW.
Which API 5L grade is most commonly used?
API 5L Grade B, X52, and X65 are among the most commonly specified grades for pipeline projects.
Can API 5L pipe be coated?
Yes. Common coating systems include FBE, 3LPE, and 3LPP for corrosion protection.
Hot Tags: steel round pipe api 5l, China steel round pipe api 5l manufacturers, suppliers, factory, hollow section boiler pipe, API X52 Seamless Steel Pipe, High pressure alloy pipes, ASTM A106 Cold Rolled Seamless Pipe, Carbon Seamless Tube for Fluid Pipe, Structural tubing
Send Inquiry
