API 5L Grade X52 Carbon Steel Pipe
Products Description
Product Name | API 5L Grade X52 Carbon Steel Pipe |
Outer Diameter | 21.3-1200mm (Seamless) / 406-2500mm (Welded) |
Wall Thickness | 2-130mm |
Length | Standard: 6 meters / Custom: As per project requirements |
End Finishes | Plain Ends, Beveled Ends, Threaded Ends, Socket Ends |
Connection Options | Welding, Coupling, Socket Joint |
Applicable Standards | API 5L, GB/T 9711, ISO 3183 |
Specifications and Standards
API 5L Grade X52 Carbon Steel Pipes are manufactured in strict compliance with API SPEC 5L (46th edition), the global benchmark for line pipes, and corresponding Chinese standard GB/T 9711 (equivalent to L360/L390), API 5L X52 offers two product specification levels:
Property | /PSL1 | /PSL2 |
Yield Strength | ≥360 MPa | 358-531 MPa |
Tensile Strength | ≥455 MPa | 455-760 MPa |
C (Carbon) | ≤ 0.28% | ≤0.26% (tighter control) |
Mn (Manganese) | ≤ 1.4% | ≤ 1.4% |
P & S (Phosphorus, Sulfur) | ≤0.030% each | ≤0.020% each (enhanced purity) |
Carbon Equivalent (Ceq) | Not specified | ≤0.43% (ensures weldability) |
Impact Toughness | Not required | ≥40 J at -20°C (mandatory) |
NDT Coverage | Sampling | 100% UT + 100% ET (full inspection) |
Special Grades | - | X52M (TMCP), X52N (Normalized), X52Q (Q&T) |
Manufacturing Method of API 5L Grade X52 Seamless Carbon Steel Pipe
Manufacturing Method | Process Description | Key Advantages | Typical Applications |
Hot Rolling | Heated billet (~1200°C) pierced and rolled into tube; high-speed production. | High efficiency, suitable for large-diameter pipes | Large-scale oil & gas transmission pipelines |
Cold Drawing | Cold working of hot-rolled tube through dies to improve dimensions and surface finish. | Enhanced precision, smooth surface, improved strength | Precision industrial and high-pressure systems |
Hot Expansion | Local heating and radial expansion of pre-formed tube to achieve non-standard sizes. | Custom large diameters, flexible sizing options | Special engineering projects, offshore platforms |
Quality Assurance
Test Category | Testing Method | Purpose | Standards Compliance |
Hydrostatic Test | 1.5× standard pressure, held for ≥10 seconds | Detect leaks, verify pressure integrity | API 5L, ISO 3183 |
Non-Destructive Testing | Ultrasonic Testing (UT), Eddy Current Testing (ET); X-ray available for high-spec | Identify internal flaws, surface cracks, and defects | ASTM E213, E571, EN 10246 |
Mechanical Testing | Tensile, Charpy V-notch Impact, Hardness tests | Confirm strength, toughness, and ductility | ASTM A370, ISO 6892-1 |
Chemical Analysis | Spectrometric analysis of C, Mn, P, S, and trace elements | Ensure compliance with grade-specific composition limits | ASTM E1479, GB/T 20123 |
Customized Solutions for Diverse Scenarios
We offer tailored products to meet specific project requirements:
★Special Grades: X52QO (quenched & tempered for offshore use, withstanding 1500m water depth), X52NS (sulfide stress cracking resistance for sour service), and X52M (low-temperature toughness for arctic conditions).
★Precision Sizing: Outer diameters from 21.3mm to 1200mm, wall thicknesses from 2mm to 130mm, with tight tolerances (outer diameter ±0.75%, wall thickness +15/-10%).
★Anti-Corrosion Coatings: 3PE, FBE, or composite linings to extend service life by 8-10 years in corrosive environments.
Product Show
Packing & Loading
