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Help CenterAPI 5L Gr B Seamless Steel Pipe 24 Inch Sch 80 0.688 Wall Thickness
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer the API 5L Gr B Seamless Steel Pipe 24 Inch Sch 80 0.688 Wall Thickness, a high-performance solution designed for demanding pipeline applications. Our seamless pipes are manufactured under strict quality control, leveraging our ISO9001-certified management system to ensure consistent material properties and dimensional accuracy. With an annual export value exceeding US$50 million and a global reach spanning North America, Europe, Asia, and beyond, we deliver reliable piping products that meet the rigorous requirements of oil and gas transmission systems.
This particular grade – API 5L Grade B – is specified for medium-strength carbon steel line pipe, offering an excellent balance of weldability, toughness, and pressure capacity. The 24-inch outside diameter combined with Schedule 80 (0.688-inch wall thickness) provides substantial wall strength for high-pressure applications, making it suitable for both onshore and offshore pipeline projects. Our seamless manufacturing process eliminates longitudinal welds, enhancing structural integrity and reducing the risk of failure under cyclic loading.
Key Features & Technical Specifications
- Material Grade: API 5L Gr B carbon steel, with controlled chemical composition (C ≤ 0.28%, Mn ≤ 1.20%, P ≤ 0.030%, S ≤ 0.030%).
- Outside Diameter: 24 inches (609.6 mm) – precision hot-rolled with tight tolerance compliant with API 5L.
- Wall Thickness: 0.688 inches (17.48 mm) – Schedule 80, providing high burst pressure resistance.
- Seamless Process: Hot-rolled piercing followed by cold-drawing or hot-rolling, ensuring uniform wall thickness and no weld defects.
- Length Options: Standard random lengths 6–12 meters, or fixed lengths as required (custom per order).
- End Preparation: Beveled ends (30°–35°) for field welding, plain ends, or threaded connections available.
- Surface Coating: Black varnish, anti-corrosion oil, or fusion-bonded epoxy (FBE) coating upon request.
- Certifications: ISO9001:2015 quality management system; mill test certificates (MTC) provided with each shipment.
Mechanical & Dimensional Parameters
| Parameter | Value | Note |
|---|---|---|
| Yield Strength (min) | 35,000 psi (241 MPa) | Per API 5L Gr B |
| Tensile Strength (min) | 60,000 psi (414 MPa) | Per API 5L Gr B |
| Elongation (min) | 18% in 2 inches | Ductile performance |
| Wall Thickness Tolerance | ±12.5% | API 5L standard |
| Diameter Tolerance | ±1% for OD > 20 inch | Precise fit |
| Hydrostatic Test Pressure | 2,500 psi (typical) | 100% tested |
Advantages & Customer Benefits
- Enhanced Safety: Seamless construction eliminates weld defects, reducing leak risks in high-pressure gas and oil lines.
- High Pressure Rating: Sch 80 wall thickness allows operation at elevated pressures, suitable for long-distance transmission.
- Wide Compatibility: API 5L Gr B material is readily weldable with standard carbon steel electrodes, simplifying field installation.
- Corrosion Protection Options: Available with 3LPE, FBE, or other coatings to extend service life in aggressive environments.
- Global Compliance: Meets API 5L specification, recognized by international oil & gas project standards.
- Customizable Lengths: We can supply cut-to-length pipes to reduce on-site cutting waste and labor.
Trust & Quality Assurance
Hemaokang Steel (Shandong) Co., Ltd., established in 2025, has rapidly grown into a global supplier with annual export value between US$50 million and US$100 million. Our team of 51–100 experienced professionals ensures that every pipe undergoes rigorous inspection, including dimensional checks, hydrostatic testing, and chemical analysis. We are ISO9001 certified, reflecting our commitment to consistent quality management. Our pipes have been delivered to clients in North America, South America, Europe, Africa, the Middle East, and Asia, earning trust through reliable performance and on-time delivery.
Whether you are constructing a new pipeline or repairing existing infrastructure, our API 5L Gr B seamless pipe in 24-inch Sch 80 offers the strength and dependability you need. We provide complete mill test certificates and third-party inspection support. Contact us today for a competitive quote, sample availability, or technical consultation. Let Hemaokang Steel be your partner in pipeline excellence.
Frequently Asked Questions (FAQ)
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Q: What is the difference between API 5L Gr B and A106 Gr B?
A: API 5L Gr B is specifically designed for line pipe applications in oil and gas transmission, while A106 Gr B is for general high-temperature service. Both are similar in strength, but API 5L has stricter traceability and testing requirements for pipeline use. -
Q: Can this pipe be used for sour service (H2S environment)?
A: Standard API 5L Gr B is not inherently sour-resistant. If sour service is required, we recommend specifying NACE MR0175/ISO 15156 compliant material. Please contact us for customized options. -
Q: What is the maximum length you can supply for 24-inch Sch 80 seamless pipe?
A: Our standard production can achieve lengths up to 12 meters (40 feet). For longer single pieces, please inquire about availability; we can also supply double random lengths. -
Q: Do you provide third-party inspection services?
A: Yes, we support inspection by recognized agencies such as SGS, BV, or Lloyds. We can arrange it at the buyer’s request, with costs as agreed. -
Q: What coatings are available for this pipe?
A: We offer black varnish, anti-corrosion oil, fusion-bonded epoxy (FBE), 3-layer polyethylene (3LPE), and 3-layer polypropylene (3LPP). Coating selection depends on project environment and pressure requirements. -
Q: Is the pipe suitable for underground burial?
A: Yes, with appropriate external coating (e.g., FBE or 3LPE) and cathodic protection, it is widely used for buried pipelines. We can also supply coating application services. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ for this size is typically 10 tons, but we can negotiate smaller quantities for sample orders or urgent projects. Contact our sales team for details. -
Q: How do you ensure the quality of the pipe?
A: Every pipe is manufactured under ISO9001 system, and we perform 100% hydrostatic testing, ultrasonic testing, and dimensional inspection. Mill test certificates are issued per batch.
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