API 5L X42 Steel Pipe
API 5L X42 is a high-strength carbon steel line pipe standard (L290) for oil, gas, and water transmission. Offering a minimum yield strength of 290 MPa, it is available in PSL1 and PSL2 specifications with excellent weldability and pressure containment.
| Material | Carbon Steel Line Pipe (Midstream) |
|---|---|
| Grade / Standard | API 5L X42 / L290 |
| Outer Diameter (OD) | NPS 1/2" - 56" (21.3mm - 1422mm) |
| Wall Thickness (WT) | Sch 10 - Sch 160 / XXS (2mm - 60mm) |
| Length | SRL (5-7m) / DRL (10-12m) / Fixed up to 18m |
| Delivery Condition | hot_rolled / cold_rolled |
| Surface Treatment | galvanized |
| MOQ | 5 Tons |
| Delivery Time | 15-30 Days / In Stock |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of API 5L X42 Steel Pipe
API 5L X42 (also designated as L290) is a high-performance carbon steel line pipe grade specified by the American Petroleum Institute for the efficient transportation of oil, gas, and water. Positioned as a mid-range strength grade within the API 5L hierarchy, X42 offers a significant increase in yield strength (min 290 MPa / 42,100 psi) compared to Grade B, allowing for higher operating pressures or reduced wall thicknesses in pipeline design. Available in both PSL1 (standard) and PSL2 (stringent) Product Specification Levels, API 5L X42 is the industry standard for gathering systems and midstream transmission networks where reliable pressure containment and material durability are critical.
Shandong Tanglu Metal Material Co., Ltd. supplies premium API 5L X42 line pipes produced through advanced seamless or welded (ERW, LSAW, SSAW) manufacturing technologies. This grade is engineered to provide an exceptional balance of structural rigidity, impact toughness, and field weldability, ensuring the long-term integrity of pipelines in diverse onshore and offshore environments. For B2B clients, API 5L X42 represents a globally compliant, high-value material solution for large-scale energy infrastructure projects.
Key Features and Technical Advantages
The primary advantage of API 5L X42 steel pipe is its enhanced yield-to-tensile ratio, which optimizes material usage in high-pressure fluid transmission. The grade features a precisely controlled chemistry with micro-alloying elements that refine the grain structure, resulting in superior fracture toughness and resistance to crack propagation. It is specifically designed to withstand the rigorous demands of hydrostatic testing and field bending without structural degradation.
Our API 5L X42 pipes are available in a vast range of specifications, from NPS 1/2″ up to NPS 56″, covering all standard schedules and specialized wall thicknesses. For projects requiring enhanced safety and traceability, we supply PSL2 X42 pipes which feature tighter chemical tolerances, mandatory Charpy V-Notch (CVN) impact testing, and rigorous non-destructive examination (NDE). To ensure maximum longevity, we offer specialized internal and external anti-corrosion coatings such as 3PE, FBE, and liquid epoxy, tailored to specific soil conditions or maritime exposures.
Main Applications of API 5L X42 Line Pipe
API 5L X42 steel pipe is the foundational material for mid-to-high pressure midstream infrastructure. It is extensively used in the construction of cross-country oil and natural gas transmission pipelines, where higher yield strength is required to maintain flow efficiency over long distances. In the upstream sector, it serves as a robust conduit for gathering lines and flowlines connecting wellheads to central processing facilities.
Beyond hydrocarbons, X42 is widely utilized for large-scale municipal water transmission projects and high-pressure slurry pipelines in the mining industry. It is also an essential material for offshore platform piping systems, refinery process lines, and airport fuel distribution networks. Its versatility and reliable mechanical performance make it a staple for EPC contractors and pipeline operators involved in the world’s most critical energy and industrial fluid transport deployments.
Why Choose Us for API 5L X42 Steel Pipe
Shandong Tanglu Metal Material Co., Ltd. supplies high-grade API 5L X42 steel pipe sourced from Tier-1 mills with ISO and API 5L certifications. We provide comprehensive Mill Test Certificates (MTC) for every order, documenting full compliance with the latest API 5L 46th edition, including precise chemical analysis, mechanical property verification, and mandatory hydrostatic pressure test results.
Our logistical expertise ensures flexible pipe lengths (SRL, DRL, or Fixed) and specialized seaworthy packaging designed to protect beveled ends and anti-corrosion coatings during international transit. With a stable monthly supply capacity of 12,000 tons and dedicated technical support for both PSL1 and PSL2 specifications, we provide B2B clients with the material consistency, technical transparency, and logistical reliability required for high-stakes energy infrastructure.
📐 Dimension & Size Table
| NPS (Inch) | OD (mm) | Schedule | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|
| 4" | 114.3 | Sch 40 (STD) | 16.07 | |
| 6" | 168.3 | Sch 40 (STD) | 28.26 | |
| 8" | 219.1 | Sch 40 (STD) | 42.55 | |
| 10" | 273.1 | Sch 40 (STD) | 60.31 | |
| 12" | 323.8 | Sch 40 (STD) | 79.73 | |
| 16" | 406.4 | Sch 40 (STD) | 125.17 | |
| 24" | 610.0 | Sch 40 (STD) | 257.06 | |
| 36" | 914.4 | Sch 40 (STD) | 426.33 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.26 | ≤0.26 | For PSL1 (L290) |
| Mn | - | 1.30 | ≤1.30 | |
| P | - | 0.030 | ≤0.030 | |
| S | - | 0.030 | ≤0.030 | |
| Ti | - | 0.04 | Ref ≤0.04 | For PSL2 orders |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength | ≥290 | MPa | 42,100 psi (L290) |
| Tensile Strength | ≥415 | MPa | 60,200 psi |
| Elongation (A50mm) | ≥23 | % | Calculated base |
| Hydrostatic Test | Passed | - | Mandatory testing |
| Impact Toughness (CVN) | Required | J | For PSL2 orders |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Seaworthy export standard packaging. Pipes are tightly bundled with high-strength steel straps for smaller diameters, while large diameters are shipped loose with protective end caps. For anti-corrosion coated pipes (3PE/FBE), bundles are protected with waterproof woven bags or plastic wrapping, and handled with specialized non-metallic slings to ensure zero damage to the coating surface during international transit. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit),D/P (Documents against Payment),Western Union |
| Price Term | FOB,CFR,CIF,DDP |
| Supply Capacity | 12,000 Tons/Month |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our API 5L X42 Steel Pipe?
Optimized Pressure Integrity
290 MPa minimum yield strength (L290) allows for higher operating pressures or reduced material weight in large-scale transmission pipelines.
Stringent PSL2 Compliance
PSL2 specification provides mandatory impact testing and tighter chemical control, essential for high-risk offshore and corrosive environments.
Outstanding Field Weldability
Precisely controlled carbon equivalent ensures high-integrity structural welding and reliable performance during cross-country pipeline assembly.
100% Hydrostatic Assurance
Every length of pipe is subjected to rigorous mill pressure testing to guarantee leak-free performance and structural safety under service pressure.
Superior Anti-Corrosion Substrate
Provides the ideal clean surface for 3PE, FBE, and liquid epoxy coatings, ensuring long-term underground and maritime durability.
🏭 Applications of API 5L X42 Steel Pipe
API 5L X42 steel pipe is the definitive choice for midstream energy infrastructure, essential for high-pressure oil and gas transmission pipelines and oilfield gathering flowlines. It is the primary material for municipal large-scale water transmission networks and specialized high-pressure slurry pipelines in the mining sector. In the offshore industry, it is widely utilized for platform piping and subsea transmission lines. API 5L X42 also serves as the trusted standard for refinery process piping, airport fuel distribution, and high-integrity industrial fluid engineering projects.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ ABS
- ✅ DNV GL
- ✅ Lloyd's Register (LR)
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
- ✅ NK
- ✅ RINA
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 EN 10204 3.2
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
- 📋 Certificate of Origin
❓ Frequently Asked Questions
What is the yield strength of API 5L X42 pipe?
The minimum yield strength is 290 MPa (42,100 psi). The 'X' in X42 represents high-strength line pipe, and '42' represents the minimum yield strength in kilopounds per square inch (ksi).
What is the difference between X42 and Grade B?
X42 has a higher yield strength (290 MPa) compared to Grade B (245 MPa). This allows for higher pressure ratings or thinner wall thicknesses in pipeline construction while maintaining safety factors.
Can X42 pipe be used for offshore subsea pipelines?
Yes, but for subsea applications, it is highly recommended to order the pipe to PSL2 specifications (Annex J) which include mandatory fracture toughness and higher manufacturing controls.
What are the common welding methods for X42 pipe?
API 5L X42 is highly weldable and is typically joined using Shielded Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW), or Submerged Arc Welding (SAW) depending on the pipeline environment.
What is the lead time for 3PE coated X42 pipe?
For standard sizes in stock, the coating and preparation process typically adds 7-10 days, with a total delivery time of 15-30 days from major ports like Tianjin or Qingdao.
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API 5L X42 Steel Pipe
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