What Is a Seamless Stainless Steel Tube?

A seamless stainless steel tube is a long, hollow cylinder made from stainless steel, manufactured without any welded seams. Unlike welded tubes, seamless tubes are formed through an extrusion or piercing process that ensures uniform wall thickness and greater mechanical strength.

Because of its structure and integrity, the seamless tube is ideal for critical applications where reliability under stress is essential — including chemical processing, oil and gas, power plants, food-grade pipelines, and medical equipment.

 Product Features & Advantages

 No Welds, No Weak Points
Seamless tubes are free from welding joints, eliminating weak spots and reducing the risk of corrosion or failure under pressure.

 Superior Corrosion Resistance
Manufactured from high-grade stainless steel such as 304, 316L, and 904L, the tubes offer exceptional resistance to rust, chemicals, and harsh environmental conditions.

 High-Pressure & High-Temperature Tolerance
Perfect for boiler systems, heat exchangers, and hydraulic applications where temperature and pressure fluctuate frequently.

 Smooth Interior Surface
The seamless structure ensures smoother flow of fluids or gases, reducing friction loss and improving system efficiency.

 Precision Dimensions
Manufactured with tight tolerances, making installation and integration with other components seamless and efficient.

Long Service Life
With proper installation, these tubes can last over 20 years with minimal maintenance.

 Specifications

• Material Grades: 201, 202, 304, 304L, 316, 316L, 321, 904L, 2205, 2507, etc.

• Outer Diameter: 6 mm – 630 mm (custom sizes available)

• Wall Thickness: 0.5 mm – 40 mm

• Length: 6 meters standard (custom lengths available)

• Surface Finish: 2B, No.1, No.4, BA, Mirror (8K), HL (Hairline)

• Standard: ASTM, AISI, JIS, DIN, GB, EN

• Seam Type: Seamless (no welded seam)