API 5L X52 Welded Steel Pipe LSAW(Longitudinal Submerged Arc Welded)EFW
API 5L X52pipe also calledL360 Pipe, X52 (L360) named by minimum yield strength 52 Ksi (360 Mpa). It's a medium grade in API 5L and ISO 3183 specifications, used for oil and gas pipeline transmissions.
API 5L X52 PSL1, for the pipes in common delivery condition of As Rolled.
API 5L X52N/M/Q, for PSL2 pipe with delivery condition of N, M, and Q.
API 5L X52NS/MS/QS, for PSL2 pipes with sour services.
R:As rolled
N:Normalizing rolled, Normalized formed, Normalized
Q:Tempered and quenched
M:Thermomechanical rolled or thermomechanical formed
S:Sour Service
Technical Specifications
1. Dimensional Range (LSAW)
Parameter | Range |
|---|---|
Outer Diameter (OD) | 16" - 56" (406mm - 1422 mm) |
Wall Thickness (WT) | 6mm - 40mm (Schedule 10 - 160, STD, XS, XXS) |
Length | Single Random Length (SRL): 5-14 m;Double Random Length (DRL): 12 m (40 ft) or custom |
Ends | Plain, Beveled (30°/37.5°), Threaded (API 5B) |
Tolerances | OD: ±1%;WT: -12.5% / +15%;Length: ±50mm |
2. Chemical Composition (PSL2, wt%)
Element | C | Mn | P | S | Si | CE(IIW) |
|---|---|---|---|---|---|---|
Max | 0.24 | 1.40 | 0.025 | 0.015 | 0.45 | 0.43 |
Note: PSL2 enforceslower P/Sfor better weldability and sour service resistance.
3. Mechanical Properties (PSL2)
Property | Min | Max | Unit |
|---|---|---|---|
Yield Strength (YS) | 359 (52) | 531 (77) | MPa (ksi) |
Tensile Strength (TS) | 455 (66) | 758 (110) | MPa (ksi) |
Elongation (A50) | 23 | - | % |
Y/T Ratio | - | 0.93 | - |
Hardness | - | 250 (248 for sour) | HV10 |
Charpy V-Notch (CVN) | 27 (transverse, 0°C) | - | J |
Note:CVN impact test is mandatory for PSL2(not required for PSL1)
4. Manufacturing & Testing
-Process: Steel plate → Edge preparation → Forming → Longitudinal SAW welding (double-sided) → Cold expansion → Heat treatment (N/M/Q) → Finishing
-Hydrostatic Test: 100% of pipes;Test pressure calculated byP=2St/D;Hold time ≥10s (OD > 457 mm)
-NDT: 100% UT (weld seam + body) or RT;No substitute for hydrostatic test
-Delivery Condition: N (Normalized), M (Thermomechanical), Q (Quenched & Tempered)
Applications
Oil & Gas:Onshore transmission lines, gathering systems, offshore platforms
Petrochemical:Refinery process piping, high-pressure fluid transport
Water & Sewage:Municipal large-diameter water mains, wastewater pipelines
Power:Thermal power plant cooling water pipelines
FAQ
Q1: What coatings are available for buried service?
A: Standard options:
3LPE: 3-layer polyethylene (most common for buried pipelines)
FBE: Fusion-bonded epoxy (high corrosion resistance)
3LPP: 3-layer polypropylene (high-temperature resistance)
Custom: Bitumen, concrete weight coating (CWC) for offshore
Q2: What certificates are provided?
A:
Mill Test Certificate (MTC): EN 10204 3.1/3.2, API 5L PSL2
Material Traceability: Heat number, coil number, pipe number
Test Reports: Chemical, mechanical, hydrostatic, NDT (UT/RT)
Third-Party Inspection: SGS, BV, TUV, or client-approved inspectors
Q3: What's the typical lead time and MOQ?
A:
Lead Time: 4-6 weeks (ex-stock: 1-2 weeks)
MOQ: 50 metric tons or 1 full bundle
Packing: Standard export packing (bundles with steel straps, plastic caps)
Q4:Why Choose Our API 5L X52 PSL2 LSAW Pipe?
Full Compliance: API 5L 45th Ed., ISO 3183, NACE MR0175
Strict QC: 100% hydrostatic + NDT, third-party inspection available
Customization: OD, WT, length, ends, and coatings tailored to project needs
Global Supply: Exported to 50+ countries (Middle East, Southeast Asia, Europe)
Competitive Pricing: Direct from mill, no middlemen
Q5: What does X52 PSL2 mean?
A:
X52: Grade with minimum yield strength 52 ksi (359 MPa) (equivalent to L360).
PSL2: Product Specification Level 2-the higher integrity level with stricter chemical limits, mandatory CVN impact testing, 100% NDT, and tighter mechanical tolerances (vs. PSL1)
