API 5L X42 Carbon Steel Pipes for Oil & Gas Transmission: High-Strength Pipeline Solutions.
Seamless & Welded Pipes (10–426mm OD, 1–100mm WT) with ±1% Diameter Precision.
Manufactured to API 5L PSL1/PSL2, ASTM A106, and ASME B36.10M standards, X42 carbon steel pipes deliver 290 MPa (42,000 psi) yield strength, ideal for onshore/offshore oil, gas, and water transmission. Available in 3–12m lengths (custom-cut) with plain, threaded, or bevelled ends, these pipes support 20–25% higher pressure capacity than standard structural pipes.
Key Features:
- Pressure Rating: 5–32 MPa (725–4,640 psi)
- Temperature Range: -29°C to 425°C (-20°F to 797°F)
- Certifications: NACE MR0175, ISO 3183, PED 2014/68/EU
Technical Specifications
Dimensional Tolerances
| Parameter | Tolerance | Standard |
|---|---|---|
| Outer Diameter | ±1% | API 5L |
| Wall Thickness | ±12.5%/-10% | ASME B36.10M |
| Straightness | ≤1.5mm/m | ISO 3183 |
Mechanical Properties (API 5L X42)
| Yield Strength | Tensile Strength | Elongation | Hardness | Impact Energy (-30°C) |
|---|---|---|---|---|
| 290 MPa | 415 MPa | ≥22% | ≤22 HRC | ≥40 J (ISO 148-1) |
Material Composition & Manufacturing
Chemical Analysis (API 5L X42)
| Element | C ≤ | Mn ≤ | P ≤ | S ≤ | Si ≤ | Micro-Alloys |
|---|---|---|---|---|---|---|
| Content | 0.26% | 1.40% | 0.025% | 0.015% | 0.45% | Nb, V, Ti |
Production Process:
- Seamless (SMLS): Hot-rolled billets for high-pressure systems (ASTM A106).
- SAW Welded: Submerged arc welding (DSAW/SSAW) for large diameters.
- Heat Treatment: Normalized at 900°C (1,652°F) for stress relief.
Applications & Performance
- Onshore Oil Pipelines:
- 323mm OD, 10mm WT: 15 MPa crude oil transmission (API 5L PSL2).
- Offshore Gas Lines:
- 508mm OD, 20mm WT: Subsea gas networks (DNV-OS-F101).
- Low-Temperature Systems:
- 168mm OD, 8mm WT: Arctic oil fields (-29°C compliance).
Advantages vs. Competitors:
- Cost Efficiency: 30% lower cost than X60 pipes for moderate-pressure systems.
- Corrosion Resistance: 3LPE/3PP coatings (300–1,000µm) for harsh environments.
Quality Assurance & Packaging
- Non-Destructive Testing:
- Hydrostatic Test: 1.5×MAOP (API 5L Sec 9).
- Ultrasonic Test: ASTM A435 for weld integrity.
- Surface Protection:
- VCI paper + 3LPE coating (ISO 21809-2).
- Export Packaging:
- Hexagonal bundles with steel straps (max 5 tons).
Packing And Delivery
