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Help CenterGB/T 8163 20# Carbon Steel Seamless Tube, 4mm-50mm Wall, Hydraulic Tested, 6m Random Length
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your trusted partner for high-quality carbon steel products. Our GB/T 8163 20# Carbon Steel Seamless Tube is engineered to meet the rigorous demands of fluid transportation, structural applications, and industrial piping systems. With wall thickness ranging from 4mm to 50mm and a standard 6-meter random length, this product offers exceptional versatility and reliability. Every tube undergoes hydraulic testing to ensure leak-proof performance and compliance with international standards.
As a company with annual export value exceeding US$50 million, we have served clients across North America, South America, Europe, Southeast Asia, Africa, and beyond. Our ISO9001-certified facility in Liaocheng, Shandong, employs 51–100 skilled professionals dedicated to producing seamless tubes that deliver consistent quality and dimensional accuracy. Whether you need tubes for oil & gas, chemical processing, or construction, this product is built to perform.
Below we detail the key features, technical specifications, and advantages that make our GB/T 8163 20# seamless tube a top choice for B2B buyers worldwide.
Key Features & Advantages
- Material Integrity: Made from 20# carbon steel (0.17–0.24% carbon content), offering excellent strength, toughness, and weldability.
- Precise Dimensions: Wall thickness from 4mm to 50mm, with tight tolerances (±10% for wall, ±1% for OD) to ensure easy installation and compatibility.
- Hydraulic Tested: Each tube is subjected to a hydrostatic test (pressure up to 10 MPa or as per standard) to verify leak tightness and burst resistance.
- Random Length 6m: Standard 6-meter random lengths reduce waste and simplify logistics, with custom lengths available upon request.
- Surface Finish: Available in black, varnished, or oiled finish to prevent corrosion during transit and storage.
- Certification: Manufactured under ISO9001 quality management system, ensuring traceability and consistent quality.
- Versatile Applications: Suitable for conveying fluids (water, oil, gas), structural supports, boiler tubes, and mechanical parts.
Technical Specifications
| Parameter | Value |
|---|---|
| Standard | GB/T 8163 (Chinese standard for seamless steel tubes for fluid transport) |
| Material Grade | 20# (equivalent to AISI 1020, DIN St37.2, etc.) |
| Outer Diameter (OD) | 21.3mm – 610mm (customizable) |
| Wall Thickness (WT) | 4mm – 50mm |
| Length | 6m random length (5.8m – 6.1m tolerance); custom lengths available |
| Tensile Strength | ≥ 410 MPa |
| Yield Strength | ≥ 245 MPa (for WT ≤ 16mm) |
| Elongation | ≥ 20% |
| Hydraulic Test Pressure | Per GB/T 8163 (typically 5 MPa – 10 MPa, depending on wall thickness) |
| Ends | Plain ends, beveled ends, or threaded – optional |
Why Choose Our GB/T 8163 20# Seamless Tube?
- Reliable Sourcing: As a direct manufacturer, we control quality from raw material to finished product, ensuring consistent supply chain.
- Cost-Effective: Our large-scale production capabilities (annual export US$50M–US$100M) allow competitive pricing without compromising quality.
- Global Reach: We export to over 30 countries and regions, with proven logistics solutions for sea, air, and land freight.
- Quality Assurance: Every batch is tested by our in-house lab and third-party inspectors (upon request). ISO9001 certification guarantees systematic quality control.
- Customization: Need non-standard lengths, special coatings, or packaging? We offer flexible options to meet your project requirements.
At Hemaokang Steel, we understand that your operation depends on durable, precisely specified steel tubes. Our GB/T 8163 20# seamless tube has been trusted by leading companies in the oil & gas, petrochemical, and construction sectors. With a dedicated team of 51–100 employees and a state-of-the-art facility in Liaocheng, we are committed to delivering on time, every time.
Contact us today to request a quotation, discuss your specific needs, or place a trial order. Experience the reliability of a supplier that values partnership and quality above all else.
Frequently Asked Questions (FAQ)
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Q: What is the difference between GB/T 8163 and ASTM A106?
A: GB/T 8163 is a Chinese standard for seamless steel tubes used for fluid transport, while ASTM A106 is an American standard for high-temperature service. Both have similar mechanical properties, but GB/T 8163 is widely accepted in Asian and Middle Eastern markets. We can also produce to ASTM or DIN standards upon request. -
Q: Do you provide third-party inspection certificates?
A: Yes, we can arrange inspection by SGS, BV, or other accredited third parties at the buyer’s cost. Our in-house quality control includes hydraulic testing, dimensional checks, and chemical analysis. -
Q: Can I order tubes with a length other than 6 meters?
A: Absolutely. While 6m random length is standard, we can supply fixed lengths (e.g., 5.8m, 12m) or random lengths per your request. Additional charges may apply for non-standard lengths. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, the MOQ is typically 20 tons. For non-standard dimensions or special finishes, the MOQ may be higher. Please contact our sales team for a customized quote. -
Q: How do you ensure the tubes are corrosion-resistant during shipping?
A: We apply a protective varnish or oil coating on the surface. For sea freight, tubes are bundled, wrapped with water-resistant material, and secured with steel straps. Additional rust-proof packaging (e.g., VCI paper) is available. -
Q: Are these tubes suitable for high-pressure applications?
A: Yes, the hydraulic test ensures they can withstand pressures up to 10 MPa (depending on wall thickness). For very high-pressure or critical applications, we recommend consulting our engineers to select the appropriate grade and wall thickness. -
Q: What is your delivery time?
A: For standard sizes and quantities, delivery is typically 20–30 days after receipt of deposit. Custom orders may require 30–45 days. We always strive to meet your schedule. -
Q: Do you offer samples before bulk order?
A: Yes, we can provide free samples of up to 1 meter in length (buyer pays shipping). This allows you to evaluate the quality firsthand.
Trust Hemaokang Steel (Shandong) Co., Ltd. – your reliable partner for carbon steel seamless tubes. With annual export value of US$50 million–US$100 million, ISO9001 certification, and a dedicated team, we are ready to support your business. Contact us now for a competitive quote and fast delivery!
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