Seamless steel tubes are long strips of steel with hollow cross-sections and no joints around the perimeter. These tubes, featuring a hollow cross-section, are extensively used as pipelines for conveying fluids, such as oil, natural gas, coal gas, water, and certain solid materials.

Compared to solid steel products like steel pipes and round bars, steel tubes have a lighter weight while maintaining the same bending and torsional strength. They are an economical section steel, widely used in the manufacturing of structural components and mechanical parts, such as oil drilling pipes, automotive drive shafts, bicycle frames, and steel scaffolding used in construction.

Standard for Seamless Steel Pipes

Structural Seamless Steel Tubes (GB/T8162-1999) / Seamless Steel Tubes for Fluid Transportation (GB/T8163-1999) / Seamless Steel Tubes for Low and Medium Pressure Boilers (GB3087-1999) / Seamless Steel Tubes for High Pressure Boilers (GB5310-1995) / High Pressure Seamless Steel Tubes for Fertilizer Equipment (GB6479-86) / Seamless Steel Tubes for Petroleum Cracking (GB9948-88) / Steel Tubes for Geologic Drilling (YB235-70) / Seamless Steel Tubes for Diamond Core Drilling (GB3423-82) / Petroleum Drilling Pipes (YB528-65) / Carbon Steel Seamless Steel Tubes for Ship Use (GB5213-85) / Seamless Steel Tubes for Automotive Half Shafts (GB3088-82) / High Pressure Oil Tubes for Diesel Engines (GB3093-86) / Precision Inner Diameter Seamless Steel Tubes for Hydraulic and Pneumatic Cylinders (GB8713-88) / Cold Drawn or Cold Rolled Precision Seamless Steel Tubes (GB3639-83).