Seamless Steel Tube Manufacturer & Custom Tubing Supplier
As a dedicated seamless steel tube manufacturer, we offer precision-made round tubing for structural and mechanical applications. Using advanced extrusion technology, we produce hot finished, hot rolled, and cold drawn seamless tubes in a wide range of sizes, with options for custom finishes, lengths, and wall thicknesse. Our tubes are manufactured to meet industry standards, ensuring high strength, dimensional accuracy, and reliable performance.
Features of Seamless Steel Tubes
- Thes are stronger than welded tubes and can withstand higher pressures without failure.
- Made from carbon or alloy steels, they are suitable for a variety of requirements and applications.
- Without seams, they offer consistent strength and wall thickness throughout the entire tube.
- Manufactured with high accuracy, seamless tubes are ideal for applications that require exact dimensions.
- The smooth surface reduces friction, enhancing fluid flow efficiency.
- They are resistant to shocks and vibrations, making them suitable for transportation and rugged environments.
- They maintain their shape under stress, which is critical for high-pressure applications.

Seamless Steel Tube Series - Custom Manufacturing & Supply
Seamless steel tubes 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.
BAOKUN offers custom seamless steel round tubing tailored to your project’s specific requirements, including:
- Custom outer diameter and wall thickness
- Cut-to-length service
- Material grade selection (e.g., SAE 1018, SEA 1026)
- Custom packaging for relialbe supply
Whether you need high-strength tubing for heavy equipment or precision tubes for hydraulic systems, our team can deliver based on your exact specs.
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.
Why Choose Baokun For Seamless Steel Tubes?
Baokun is one of the leading manfuacturers of seamless steel tubes. With years of industry experience, our products are known for reliability, strength, and precision. Our custom steel tubes are manufactured using high-grade raw materials and advanced production lines, making them ideal for use in oil & gas, construction, automotive, and machinery sectors. We support both standard and custom specifications to meet different project requirements.
Looking for a reliable source of seamless steel tubes? Contact us today for a quote or to discuss your project needs.
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
Seamless steel tubes are manufactured using different methods depending on the desired mechanical properties, surface finish, and dimensional accuracy. Understanding the differences between hot rolled, hot finished, and cold drawn seamless steel tubes is key when selecting the right tube for your application.
Hot Rolled Seamless Tubes
Hot rolled seamless tubes are made by heating a solid billet above 1000°C and rolling it into a tube. This method is cost-effective and suitable for larger diameters, but it results in a rough surface and lower dimensional precision.
Hot Finished Seamless Tubes
Hot finished tubes are processed further after hot rolling. The tube is reheated and heat-treated to improve uniformity and mechanical properties. These tubes are more stable and machinable than basic hot rolled tubes, making them suitable for hydraulic and mechanical systems.
Cold Drawn Seamless Tubes
Cold drawn seamless tubes go through additional processing at room temperature. The tube is pulled through precision dies to improve surface finish, increase tensile strength, and tighten dimensional tolerances. This process is ideal for high-pressure systems and precision mechanical parts.
Feature | Hot Rolled Seamless Tube | Hot Finished Seamless Tube | Cold Drawn Seamless Tube |
Manufacturing Process | High-temp rolling | Hot rolled + heat treatment | Cold drawing at room temperature |
Surface Finish | Rough | Moderate | Smooth |
Dimensional Accuracy | Low | Medium | High |
Mechanical Strength | Lower | Medium | Higher |
Microstructure | Inconsistent | Uniform | Highly refined |
Cost | Low | Moderate | High |
Common Applications | General construction, pipelines | Hydraulic systems, machine parts | Automotive, high-pressure tubing |
Choosing the right type of seamless steel tube depends on your application. Cold drawn tubes offer superior strength and precision, but at a higher cost. Hot finished tubes balance performance and price, while hot rolled tubes are the most economical for non-critical applications.
Applications of Seamless Steel Tubes
Seamless steel tubing finds extensive use across various industries due to its mechanical properties and adaptability. Here are some common applications:
Hot Rolled Seamless Steel Tubes:
- Structural components for construction and engineering.
- Oil and gas pipelines for transporting fluids under high pressure.
- Heavy machinery parts, including excavators and road rollers.
Cold Drawn Seamless Steel Tubes:
- Precision components in automotive manufacturing (e.g., drive shafts, axles).
- Hydraulic cylinders and system components.
- Boiler tubes and heat exchangers requiring high dimensional accuracy.
Hot Finished Seamless Steel Tubes:
- Pressure vessels and high-temperature pipelines for power generation.
- Steam pipes and components in nuclear and thermal power plants.
- Heavy-duty mechanical parts in industrial machinery.
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.
7. Is steel tubing measured by ID or OD?
Steel tubing is typically measured by the outer diameter (OD), which is the total width of the tube from one side to the other, including the wall thickness. This measurement is crucial because it determines the tube’s strength and how it fits into other components.
However, the inner diameter (ID), which measures the inside of the tube, is important for certain applications, such as when considering fluid flow or pressure. Depending on your specific needs, both measurements might be relevant, but the OD is usually the standard.