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Help CenterAPI 5L Gr.B Carbon Steel Seamless Tube, 0.5-12 Inch OD, Cold Drawn, 0.5mm Tolerance, Beveled Ends
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As a leading manufacturer from Hemaokang Steel (Shandong) Co., Ltd., we take pride in offering high-quality API 5L Gr.B Carbon Steel Seamless Tube with precise specifications. Our product is cold drawn to ensure superior surface finish and dimensional accuracy, with an outer diameter range of 0.5 to 12 inches and a tight tolerance of ±0.5mm. The beveled ends are prepared for efficient welding, making it an ideal choice for pipeline systems in oil and gas transportation. With our ISO9001 certification and annual export value exceeding US$50 million, we guarantee reliable supply and consistent quality for global customers.
Our seamless tubes are manufactured using advanced cold drawing technology, which enhances mechanical properties and provides a smooth, defect-free surface. The API 5L Gr.B grade ensures excellent strength and toughness for high-pressure applications. Below are the key technical parameters:
| Parameter | Value |
|---|---|
| Standard | API 5L Gr.B (PSL1 / PSL2 available upon request) |
| Outer Diameter | 0.5 – 12 inch (customizable) |
| Wall Thickness | SCH 10 to SCH 160 (or as per customer requirement) |
| Tolerance | ±0.5mm (OD), ±0.1mm (wall thickness optional) |
| End Finish | Beveled (30°-37.5° as per API 5L standard) |
| Length | 5.8m, 11.8m, or random lengths (1-12m) |
| Surface Condition | Black, oiled, or varnished (customizable) |
Key Features and Benefits:
- Precision Cold Drawn Process: Ensures tight dimensional tolerances, excellent concentricity, and a smooth internal surface, reducing flow resistance and improving system efficiency.
- API 5L Gr.B Compliance: Meets the chemical and mechanical requirements for line pipe, including yield strength (min. 35,000 psi) and tensile strength (min. 60,000 psi), ensuring reliable performance in harsh environments.
- Beveled Ends: Pre-prepared bevels facilitate quick and strong welding joints, saving fabrication time and reducing installation costs.
- Versatile Size Range: From 0.5 to 12 inches OD, suitable for both small-diameter instrumentation lines and main pipeline systems.
- Customizable Options: Length, wall thickness, and surface treatment can be tailored to your project requirements, optimizing material usage and reducing waste.
- Rigorous Quality Control: Each tube undergoes hydrostatic testing, eddy current inspection, and dimensional checks to guarantee defect-free delivery.
Our production facility in Liaocheng, Shandong, is equipped with modern cold drawing lines and testing equipment. With a team of 51-100 experienced workers and a strong export network covering North America, South America, Europe, Asia, Africa, and Oceania, we have the capacity to fulfill large-volume orders with consistent lead times. Since our establishment in 2025, we have rapidly grown to an annual export value of US$50-100 million, reflecting the trust and satisfaction of our global clients.
Why Choose Hemaokang Steel?
- ISO9001 certified quality management system ensures traceability and consistency.
- Free samples available for customer evaluation.
- Third-party inspection (SGS, BV, etc.) accepted at client's cost.
- Flexible payment terms: T/T, L/C, or others.
- Warehouse stock in Shandong for quick dispatch of common sizes.
Frequently Asked Questions (FAQ)
-
Q: What is the difference between cold drawn and hot rolled seamless tubes?
A: Cold drawn tubes have tighter tolerances, better surface finish, and higher dimensional accuracy. They are ideal for applications requiring precise OD and wall thickness, such as hydraulic systems and heat exchangers. Hot rolled tubes are more economical for large diameters with looser tolerances. -
Q: Can you supply tubes with special lengths or wall thicknesses?
A: Yes, we offer customization. Please provide your specific requirements, and we will produce according to your drawings or standards. Minimum order quantity may apply for non-standard sizes. -
Q: What is the typical lead time for this product?
A: For standard sizes (0.5-6 inch OD), lead time is around 15-20 days. For larger diameters (up to 12 inch), it may extend to 25-30 days depending on quantity. We also maintain a stock of popular sizes for immediate shipment. -
Q: Do you provide material test certificates?
A: Absolutely. Each shipment is accompanied by a mill test certificate (MTC) per EN 10204 3.1, showing chemical composition and mechanical properties. Additional third-party inspection is available upon request. -
Q: Are the beveled ends suitable for all welding methods?
A: Yes, the beveled ends conform to API 5L standard (30°-37.5° bevel angle) and are compatible with manual arc welding, TIG, MIG, and automatic welding processes. The bevel ensures proper penetration and strong joints. -
Q: What is the maximum pressure rating for these tubes?
A: The pressure rating depends on wall thickness, diameter, and operating conditions. For example, a 4-inch OD schedule 40 tube has a working pressure of approximately 1,200 psi at 100°F. Please refer to API 5L pressure tables or contact our engineers for specific calculations. -
Q: Do you offer surface treatment like galvanized or epoxy coating?
A: We can arrange 3LPE, FBE, or galvanized coating as a secondary process. Please note that the base product is supplied as black or oiled. Custom coating requires additional lead time and cost. -
Q: How do you ensure the tubes are free from defects?
A: Our quality control includes 100% hydrostatic testing, eddy current inspection, and visual examination. We also perform ultrasonic testing for critical applications upon request. All tubes are traceable from raw material to finished product.
With our ISO9001 certification, extensive global market experience, and commitment to customer satisfaction, Hemaokang Steel is your reliable partner for API 5L Gr.B seamless tubes. We invite you to contact us for a quotation, technical support, or to discuss your project requirements. Our team is ready to provide prompt service and competitive pricing. Let us help you build safe and efficient pipeline systems.
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