API 5L X52 is a pipeline steel grade with a minimum yield strength of 52,000 psi (approximately 358 MPa), widely used in pipeline systems for transporting fluids such as oil and natural gas.
This steel pipe belongs to one of the core grades in the API 5L international standard established by the American Petroleum Institute (API). "X" stands for Pipeline Steel, and "52" indicates its minimum yield strength of 52 thousand pounds per square inch (ksi), equivalent to 358 megapascals (MPa). It is primarily made of low-carbon or low-alloy steel, possessing good strength, toughness, and weldability, making it suitable for long-distance transportation projects under medium to high pressure environments.
API 5L X52 steel pipes are classified into two quality grades: PSL1 and PSL2.
PSL1 is the basic product specification grade, suitable for general working conditions;
PSL2 has stricter requirements, demanding more stringent control over chemical composition, impact toughness (e.g., Charpy impact energy ≥40J at -20℃), and carbon equivalent limits (Ceq≤0.43%) to ensure excellent weldability and low-temperature crack resistance.
NPS 2" to 48" API 5L X52 Pipes In-Stock. Get Ready-to-Ship Inventory Lists Today!
API 5L X52 Pipe Dimensions & Weight Table (NPS 2" - 24")
| Nominal Pipe Size (NPS) | OD (Inches) | OD (mm) | Wall Thickness Schedule (Sch.) | Wall Thickness (WT - mm) | Theoretical Weight ( kg/m ) |
| 2" | 2.375 | 60.3 | Sch 40 (STD) | 3.91 | 5.44 |
| Sch 80 (XS) | 5.54 | 7.48 | |||
| 3" | 3.500 | 88.9 | Sch 40 (STD) | 5.49 | 11.29 |
| Sch 80 (XS) | 7.62 | 15.27 | |||
| 4" | 4.500 | 114.3 | Sch 40 (STD) | 6.02 | 16.07 |
| Sch 80 (XS) | 8.56 | 22.32 | |||
| 6" | 6.625 | 168.3 | Sch 40 (STD) | 7.11 | 28.26 |
| Sch 80 (XS) | 10.97 | 42.56 | |||
| 8" | 8.625 | 219.1 | Sch 40 (STD) | 8.18 | 42.55 |
| Sch 80 (XS) | 12.70 | 64.64 | |||
| 10" | 10.750 | 273.1 | Sch 40 (STD) | 9.27 | 60.31 |
| Sch 80 (XS) | 15.09 | 95.97 | |||
| 12" | 12.750 | 323.8 | Sch STD | 9.53 | 73.86 |
| Sch 80 (XS) | 17.48 | 132.08 | |||
| 14" | 14.000 | 355.6 | Sch STD | 9.53 | 81.33 |
| Sch 80 (XS) | 19.05 | 158.10 | |||
| 16" | 16.000 | 406.4 | Sch STD | 9.53 | 93.27 |
| Sch 80 (XS) | 21.44 | 203.53 | |||
| 20" | 20.000 | 508.0 | Sch STD | 9.53 | 117.15 |
| Sch XS | 12.70 | 155.12 | |||
| 24" | 24.000 | 609.6 | Sch STD | 9.53 | 141.02 |
| Sch XS | 12.70 | 186.97 |
Dimensional Tolerances (API 5L Requirements)
Outer Diameter (OD) Tolerance:
Pipe Body: ±0.75% (for NPS 2-3/8" and larger).
Pipe Ends: ±0.5% or less (depending on diameter).
Wall Thickness (WT) Tolerance:
For Seamless (SMLS): +15.0% / -12.5%.
For Welded (ERW/LSAW): +10.0% / -10.0%.
End Finish & Coating Options
Ends: Plain End (PE), Beveled End (BE - usually 30° with a 1.6mm root face), or Threaded & Coupled (T&C).
Coatings: Black Vanish (anti-rust), Oil, 3PE (Three-Layer Polyethylene), or FBE (Fusion Bonded Epoxy).
GNEE Coated API 5L X52 pipeline factory
FAQ
What is the difference between API 5L Grade B and API 5L X52?
API 5L Grade B: Typically used for pipelines transporting gas, water, and oil, where the requirements are not too stringent on mechanical properties. API 5L X52: Used in pipelines that require higher strength and toughness properties, especially for offshore and deepwater oil and gas pipelines.
What is API 5L X52 equivalent to?
According to chemical composition, mechanical properties and so on technical data comparison, the API 5L X52 equivalent plate material is L360 steel, which is usually made into L360 steel plates or L360 steel pipes used in the petroleum and gas industry for pipeline transportation systems.
What is X52 pipe used for?
X52 line pipe is widely used in various applications within the oil and gas industry, including: a. Cross-country Pipelines: X52 pipe is commonly used for cross-country pipelines that transport oil, gas, and other fluids over long distances.
