BAOKUN STEEL: Seamless Steel Tube China Manufacturer & Supplier
Our seamless steel tubes are made from carbon steel or alloy steel, offering exceptional durability and strength. We have a variety of sizes of tubes in stock, ensuring fast delivery. We also offer custom options tailored to your specific requirements. We can produce according to your needs. As a direct manufacturer, BAOKUN offer competitive pricing with a minimum order quantity of 1 ton, making it ideal for long-term partnerships.
Features of Our Seamless Tubing
Wholesale Seamless Steel Tubes Custom Manufacturing & Supply
Seamless steel tubing is an essential material in various industrial applications, known for its strength, durability, and versatility. This type of tubing is manufactured without seams or welds, which enhances its structural integrity and makes it ideal for high-pressure applications. The production process involves heating a solid steel billet and then piercing it to create a hollow tube, followed by further processing to achieve the desired dimensions and properties.
There are two primary types of seamless steel tubing: Cold Drawn Seamless (CDS) and Hot Finished Seamless (HFS). Each type has distinct characteristics and is suited for different applications.
For businesses looking to procure seamless steel tubing tailored to specific needs, obtaining a quote is straightforward. Contact us to discuss your requirements regarding CDS or HFS options and explore our range of sizes compliant with ASTM, EN, DIN standards.
We keep a large inventory in stock, so we can provide quick and reliable delivery, helping you stay on schedule and avoid project delays.
As a direct manufacturer, we offer competitive prices on all our precision steel tubes, ensuring you get top-quality products at great value, especially for large orders.
Your satisfaction is our priority. If you receive a faulty product, we offer a full refund or exchange to make it right. Our commitment to quality means we’ll resolve any issues quickly.
Our customer service team is available around the clock to assist with any questions or concerns, ensuring you have support whenever you need it.
Are you looking for reliable manufacturers for wholesale seamless steel tubes?
At Baokun, we provide high-quality seamless steel tubes tailored to your specific needs. With years of industry experience, we offer wholesale and customized solutions. Our products are known for reliability, strength, and precision. They meet the highest standards in various applications. Whether you need small or large orders, we ensure timely delivery and customer satisfaction. Contact Baokun today for a quote!
Seamless Steel Tube Packaging
End Caps
End caps are applied to the open ends of the tubes. They are made from plastic. They prevent the entry of dirt, debris, or water into the tubes, and protect the edges of the tubes from damage during handling or stacking.
Wooden Box
Wooden crates or boxes are often used for bulk shipments of seamless steel tubes. The tubes are placed inside, usually with cushioning materials to prevent shifting and potential damage. They provide robust protection during long-distance shipping and rough handling
Pastic and Fabric Wrap
Tubes are wrapped in plastic film and fabric bags to protect against dust, moisture, and corrosion during transportation or storage. They offer a lightweight and cost-effective solution for packaging seamless steel tubes
Custom Packaging
Flexibility to accommodate various tube sizes, quantities, and shipment types based on the needs of the client or the shipping method. Custom packaging allows for branding, product identification, and labeling for easy tracking.
More Information
Seamless Steel Tube Manufacturing Process
The manufacturing process of seamless round steel tubes involves two primary methods: hot-rolled and cold-drawn.
For hot-rolled seamless tubes, the process begins with heating solid round steel billets to high temperatures to make them malleable. The heated billets are then pierced to create a hollow tube and undergo rolling processes to achieve the desired dimensions. After sizing, the tubes are cooled, straightened, tested for leaks, and prepared for storage.
Cold-drawn seamless tubes start similarly with heating and piercing but differ in that they are drawn through a die at room temperature to reduce diameter and increase length. This cold drawing process enhances dimensional accuracy and surface finish, often followed by annealing to relieve internal stresses. The final steps include pickling, oiling, straightening, hydrostatic testing, and marking.
| Feature | Hot-Rolled Seamless Tubes | Cold-Drawn Seamless Tubes |
| Process Temperature | Above recrystallization temperature | Below recrystallization temperature |
| Dimensional Tolerance | Lower precision | High precision |
| Surface Finish | Rougher surface | Smoother surface |
| Mechanical Properties | Stronger but less ductile | Higher strength and ductility |
| Applications | Structural uses | Precision applications in machinery |
Applications of Seamless Steel Tube
Seamless steel tubing finds extensive use across various industries due to its mechanical properties and adaptability. Here are some common applications:
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- Hydraulic Systems: Both CDS and HFS tubing are widely used in hydraulic cylinders, pumps, and other components due to their ability to withstand high pressures.
- Automotive Industry: Seamless tubes are integral in manufacturing parts such as axles, suspension components, and frames.
- Structural Applications: They provide essential support in construction projects, machinery frameworks, and heavy equipment.
- Oil & Gas Industry: HFS tubing is particularly valuable in drilling operations and transportation of fluids.
Frequent Asked Questions (FAQs)
1. What is a seamless steel tube?
A seamless steel tube is a type of pipe produced from solid steel billets, which are heated and then formed into a tube without any welded joints. This manufacturing process makes seamless tubes stronger and more durable, as they are not prone to weaknesses that can result from welding. They are commonly used in applications requiring high strength and resistance to high pressures.
2. What is the difference between seamless and welded tube?
The key difference between seamless and welded tubes lies in their manufacturing process. Seamless tubes are made from a single piece of steel that is extruded or drawn to form a continuous tube without any seams or welds. This makes them ideal for high-pressure and high-stress applications. In contrast, welded tubes are created by joining two edges of steel strips or sheets through welding, which makes them cheaper to produce but generally less strong and reliable than seamless tubes, especially under extreme conditions.
3. What Is the Difference Between CDS Tubing and HFS Tubing?
CDS (Cold Drawn Seamless) tubing is produced by cold drawing a seamless pipe to precise dimensions, resulting in a smooth, uniform surface and high tensile strength. It is typically used in applications where high precision and surface finish are important, such as automotive and aerospace. HFS (Hot Finished Seamless) tubing, on the other hand, is made from hot-formed seamless pipe and typically has a thicker wall and a rougher surface finish. While HFS tubing is more suitable for applications requiring thicker walls and higher resistance to impact or corrosion, CDS is preferred when surface finish and precision are key.
4. What is a seamless steel tube used for?
Seamless steel tubes are used in a wide range of industries due to their superior strength and ability to withstand high pressure. They are commonly used in oil and gas pipelines, hydraulic systems, power plants, boilers, automotive parts, and structural applications. Their ability to handle extreme conditions makes them ideal for high-stress environments, such as in heat exchangers, reactors, and heavy machinery.
5. How to make a seamless tube?
Seamless tubes are made by first heating a steel billet until it becomes malleable. A hole is then pierced through the center of the billet to create a hollow tube. The tube is then progressively elongated and reduced in diameter through processes like extrusion, rotary piercing, and elongation, which gradually stretch and refine the tube to the desired size and thickness. The final product is free from welds and joints, ensuring uniform strength and structural integrity.
6. Is seamless pipe more expensive than welded?
Yes, seamless pipes are typically more expensive than welded pipes. This is because the manufacturing process for seamless pipes is more complex and labor-intensive, requiring advanced machinery and precise control over temperature and dimensions. Seamless pipes also have better mechanical properties, such as higher strength and resistance to pressure, which makes them more suitable for demanding applications. In contrast, welded pipes are easier and cheaper to produce but may not offer the same level of durability, especially in high-pressure situations.
