API 5L Grade B Steel Pipe
API 5L Grade B is a premier carbon steel line pipe standard for oil, gas, and water transmission. Offering a minimum yield strength of 245 MPa (L245), it is available in PSL1 and PSL2 specifications with excellent weldability and pressure integrity.
| Material | Carbon Steel Line Pipe (Midstream) |
|---|---|
| Grade / Standard | API 5L Grade B / L245 |
| Outer Diameter (OD) | NPS 1/2\" - 48\" (21.3mm - 1219mm) |
| 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 Grade B Steel Pipe
API 5L Grade B (also designated as L245) is the primary industry standard for line pipes used in the transportation of oil, gas, and water. Specified by the American Petroleum Institute, this grade is engineered for reliable performance in large-scale transmission networks and gathering systems. Available in two Product Specification Levels—PSL1 for standard utility and PSL2 for more stringent technical requirements—API 5L Grade B offers an optimal balance of structural strength, crack resistance, and cost-efficiency for onshore and offshore energy infrastructure.
Shandong Tanglu Metal Material Co., Ltd. supplies high-grade API 5L Grade B line pipes produced through advanced seamless or welded (ERW, LSAW, SSAW) manufacturing processes. This grade is characterized by its predictable mechanical behavior and excellent field-weldability, ensuring long-term pipeline integrity in various geological conditions. For B2B clients in the energy sector, API 5L Grade B represents a globally recognized, standardized solution that simplifies international procurement and ensures compliance with critical safety codes.
Key Features and Technical Advantages
The primary advantage of API 5L Grade B steel pipe lies in its specialized chemical and mechanical profile designed specifically for fluid transmission. The grade features controlled carbon and manganese levels, providing the necessary yield strength (min 245 MPa) while maintaining high ductility and impact toughness. It is designed to handle the stresses of hydrostatic testing and pipeline bending, making it ideal for cross-country pipelines and complex oilfield manifold systems.
Our API 5L pipes are available in a massive range of sizes from NPS 1/2″ to NPS 48″, with wall thicknesses spanning standard schedules through specialized high-pressure weights. A critical feature of our supply is the availability of PSL2 specifications, which offer tighter chemical limits, mandatory toughness testing (CVN), and higher non-destructive examination (NDE) standards. For corrosive environments, we provide pipes with specialized internal and external coatings, including 3PE, FBE, and epoxy linings, extending the service life of the pipeline under harsh soil or maritime conditions.
Main Applications of API 5L Grade B Line Pipe
API 5L Grade B steel pipe is the definitive material for midstream energy infrastructure. it is the primary choice for constructing cross-country oil and natural gas transmission pipelines, where reliable pressure containment is paramount. In the upstream sector, it serves as the essential conduit for gathering lines that transport crude oil and gas from wellheads to processing facilities and storage terminals.
Beyond hydrocarbons, API 5L Gr. B is widely utilized for large-scale water transmission networks and specialized industrial slurry transport. It is also an indispensable component in the construction of refinery process piping, fuel distribution systems at airports, and offshore platform piping structures. Its versatility and high-integrity manufacturing make it a staple for EPC contractors and pipeline operators involved in the world’s most critical energy and fluid transport projects.
Why Choose Us for API 5L Grade B Steel Pipe
Shandong Tanglu Metal Material Co., Ltd. supplies premium API 5L Grade B steel pipe sourced from Tier-1 API-certified mills with integrated continuous casting and high-precision rolling facilities. We provide comprehensive Mill Test Certificates (MTC) for every order, documenting full compliance with the 46th edition of API 5L, including heat numbers, chemical heat analysis, mechanical verification, and mandatory hydrostatic pressure test results.
Our logistical expertise ensures flexible pipe lengths (Single/Double Random) and specialized seaworthy packaging designed to protect beveled ends and surface coatings during international transit. With a stable monthly supply capacity of 15,000 tons and technical support for both PSL1 and PSL2 requirements, we provide B2B clients with the material consistency, technical transparency, and logistical reliability required for high-stakes energy and infrastructure deployments.
📐 Dimension & Size Table
| Thickness (mm) | Width (mm) | Length (mm) | Weight (kg/m²) |
|---|---|---|---|
| 2" | 60.3 | Sch 40 (STD) | 5.44 |
| 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 |
* 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 (L245) |
| Mn | - | 1.20 | ≤1.20 | |
| P | - | 0.030 | ≤0.030 | |
| S | - | 0.030 | ≤0.030 | |
| Si | - | 0.45 | Ref ≤0.45 | For Seamless |
* 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 | ≥245 | MPa | 35,500 psi (L245) |
| Tensile Strength | ≥415 | MPa | 60,200 psi |
| Elongation (A50mm) | ≥28 | % | 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 to prevent internal contamination. For coated pipes (3PE/FBE), bundles are protected with waterproof woven bags or plastic wrapping, and handled with specialized non-metallic slings to ensure coating integrity during shipment. |
|---|---|
| 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 | 15,000 Tons/Month |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our API 5L Grade B Steel Pipe?
Certified Transmission Reliability
245 MPa minimum yield strength (L245) provides a safe, reliable conduit for high-pressure oil and gas transmission across long distances.
Enhanced PSL2 Safety Options
PSL2 specification level offers more stringent chemical control and mandatory impact testing, ideal for high-risk and offshore applications.
Excellent Field Weldability
Optimized carbon equivalent ensures consistent, high-integrity welding performance during cross-country pipeline assembly and installation.
100% Pressure Integrity
Each length of pipe is subjected to mandatory hydrostatic testing at the mill, ensuring zero leaks and structural stability under service pressure.
Superior Coating Adaptability
Perfectly smooth surface allows for the high-adhesion application of 3PE and FBE anti-corrosion coatings, essential for long-term underground use.
🏭 Applications of API 5L Grade B Steel Pipe
API 5L Grade B steel pipe is the definitive choice for midstream energy infrastructure, essential for cross-country oil and gas transmission pipelines and oilfield gathering systems. It is the primary material for municipal large-scale water transmission networks and specialized slurry pipelines in the mining industry. In the downstream sector, it is widely utilized for refinery process piping, fuel distribution at airport terminals, and offshore platform piping structures. API 5L Gr. B also serves as the trusted standard for specialized industrial fluid handling and high-integrity mechanical 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 difference between PSL1 and PSL2 in API 5L?
PSL2 is a higher specification level with more stringent chemical limits (lower C, P, S), mandatory impact toughness testing (CVN), and higher NDT requirements. PSL1 is for general standard utility, while PSL2 is for critical or corrosive environments.
Is API 5L Grade B equivalent to ASTM A106 Grade B?
They are very similar in mechanical properties, but API 5L is specifically designed for cross-country pipelines, while A106 is for high-temperature pressure piping. They can often be dual-certified, but the end-use standard should be verified.
Can API 5L Gr. B be used for sour service (H2S)?
Yes, but it must be specifically ordered as 'Sour Service' (Annex H) with HIC/SSC testing. Standard API 5L Gr. B is not inherently rated for sour service without these additional certifications.
What are the common coating options for line pipe?
The most popular anti-corrosion coatings are 3PE (Three-Layer Polyethylene) and FBE (Fusion Bonded Epoxy). Internal liquid epoxy linings are also used to reduce friction and improve flow efficiency.
What is the yield strength of API 5L Grade B?
The minimum yield strength is 245 MPa (35,500 psi). This is why the grade is also referred to as L245 in the ISO version of the standard.
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API 5L Grade B Steel Pipe
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