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Help CenterSeamless Steel Pipe for Structural Support, 6 Inch Sch 40, ASTM A500 Grade B, 20ft Length, for Building Framing
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer our premium Seamless Steel Pipe for Structural Support, specifically the 6 Inch Sch 40, ASTM A500 Grade B, 20ft Length product, designed for building framing and critical structural applications. As a company founded in 2025 with an annual export value of US$50–100 million and a team of 51–100 skilled professionals, we combine fresh manufacturing expertise with global supply chain reliability. This pipe is engineered to deliver exceptional strength, dimensional accuracy, and long-term durability, making it an ideal choice for load-bearing columns, beams, trusses, and other framing systems. Our ISO9001 certification and exports to over 15 markets worldwide ensure that every piece meets rigorous quality standards, giving you confidence in your construction projects.
Product Features & Technical Specifications
This seamless steel pipe is manufactured using advanced hot-rolling or cold-drawing processes, resulting in a homogeneous structure without weld seams. This eliminates weak points and provides superior strength and pressure resistance compared to welded pipes. The ASTM A500 Grade B specification guarantees a minimum yield strength of 42,000 psi (290 MPa) and a minimum tensile strength of 58,000 psi (400 MPa), ensuring reliable performance under heavy loads. The 6-inch nominal diameter (6.625 inches OD) and Schedule 40 wall thickness (0.280 inches) offer a balanced combination of weight and load capacity, ideal for medium-to-heavy structural framing. The standard 20-foot length reduces the need for joints, simplifying installation and enhancing structural integrity.
| Parameter | Value |
|---|---|
| Nominal Diameter | 6 inches (DN150) |
| Outside Diameter | 6.625 inches (168.3 mm) |
| Wall Thickness (Schedule 40) | 0.280 inches (7.11 mm) |
| Length | 20 feet (6.1 meters) ± 0.5 inch |
| Standard | ASTM A500 Grade B |
| Yield Strength (min) | 42,000 psi (290 MPa) |
| Tensile Strength (min) | 58,000 psi (400 MPa) |
| Surface Finish | Black (mill varnish) or hot-dip galvanized optional |
| Certification | ISO9001:2015 |
Key Advantages for Your Projects
- Seamless Construction: No weld seam means uniform strength, reduced risk of failure, and better performance in dynamic or high-stress environments.
- ASTM A500 Grade B Compliance: Meets stringent chemical and mechanical requirements, ensuring consistent quality and traceability.
- Schedule 40 Wall Thickness: Provides optimal balance between weight and load capacity, suitable for both vertical and horizontal framing members.
- Standard 20ft Length: Minimizes connections and speeds up installation; custom lengths available upon request.
- Versatile Surface Treatments: Choose from black mill finish for indoor use or hot-dip galvanized for corrosion resistance in outdoor or humid environments.
- Excellent Weldability: Low carbon content and controlled chemistry allow for easy welding and fabrication, reducing labor time.
- Dimensional Precision: Tight tolerances on OD, wall thickness, and straightness ensure compatibility with standard fittings and connectors.
Why Choose Hemaokang Steel?
With our headquarters in Liaocheng, Shandong – a major steel production hub in China – we leverage local resources and advanced manufacturing lines to deliver products that meet global standards. Our ISO9001-certified quality management system governs every step from raw material selection to final inspection. We have exported to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East, with annual export revenues exceeding US$50 million. Our dedicated team of 51–100 employees ensures prompt communication, on-time delivery, and after-sales support. Whether you need a single container or a long-term supply agreement, we can accommodate your requirements with flexible pricing and logistics solutions.
This 6-inch Sch 40 seamless pipe is stocked in our warehouse and ready for immediate shipment. We also offer cutting, threading, beveling, and coating services to meet your specific project demands. Contact us today for a quotation or technical consultation – let Hemaokang Steel be your trusted partner in building a stronger future.
Frequently Asked Questions
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Q1: What is the difference between seamless and welded steel pipe for structural framing?
A: Seamless pipe is manufactured without a longitudinal weld, offering uniform strength and better resistance to pressure and fatigue. For structural framing, seamless pipe is preferred in critical applications where weld integrity is a concern, while welded pipe may be adequate for lighter loads. Our ASTM A500 Grade B seamless pipe provides consistent mechanical properties throughout.
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Q2: Can this pipe be used for outdoor structures like bridges or towers?
A: Yes, but we recommend hot-dip galvanizing or another corrosion-resistant coating for outdoor exposure. The base material is carbon steel, which is susceptible to rust. We can supply galvanized pipes or arrange the coating service for you.
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Q3: What is the maximum length you can supply, and can you cut to custom lengths?
A: Standard length is 20 feet (6.1 meters). We can also supply 40-foot lengths or cut to custom sizes (e.g., 10 ft, 12 ft) with a tolerance of +/- 0.1 inch. Custom lengths are available upon request with appropriate lead time.
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Q4: Is this pipe suitable for welding with common techniques like MIG or TIG?
A: Absolutely. ASTM A500 Grade B has a carbon content of typically 0.26% max, which provides good weldability. Preheating is not required for most thicknesses, but we recommend following standard welding procedures for structural steel. Our pipe can be welded using MIG, TIG, or stick welding.
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Q5: What kind of surface treatment is standard – black or galvanized?
A: The standard finish is black (mill varnish/oil coating) for temporary corrosion protection during storage and transport. If you need galvanized or other coatings (e.g., epoxy, FBE), please specify in your order. We offer both options.
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Q6: Do you provide a mill test certificate (MTC) with each shipment?
A: Yes, a mill test certificate (MTC) per EN 10204 Type 3.1 is included with every shipment, detailing chemical composition and mechanical properties. This ensures traceability and compliance with ASTM A500.
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Q7: What is the minimum order quantity (MOQ) for this product?
A: Our MOQ is typically 5 tons for standard sizes. For smaller quantities, please contact our sales team – we may be able to accommodate your needs from our stock. For large projects, we can negotiate volume discounts.
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Q8: How long does shipping take to North America or Europe?
A: Typical lead time is 15–25 days after order confirmation, depending on quantity and surface treatment. Shipping to major ports (e.g., Los Angeles, Rotterdam) takes approximately 20–35 days by sea. We can also arrange express air freight for urgent orders at additional cost.
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