Generally, the seamless steel pipes used in daily life are of standard diameters, while small-diameter seamless steel pipes are used in special locations. Today, we introduce some knowledge about small-diameter seamless steel pipes to help you better utilize this material in the future. Typically, small-diameter seamless steel pipes refer to pipes with a smaller outer diameter, but there is a specific range. Generally, pipes with a steel diameter of 89mm or less and over 4mm can be classified as small-diameter seamless steel pipes.

Mostly, small-diameter seamless steel tubes are also used as pipelines for conveying fluids. Compared to solid steel like round bars, they are lighter in weight while maintaining the same bending and torsional strength. They are an economical cross-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 projects.

Small-diameter seamless steel tubes typically have an outer diameter ranging from 6 to 89mm, with a relatively small diameter. The wall thickness, ranging from 1 to 12mm, can further be categorized into small-diameter thick-walled seamless tubes and small-diameter thin-walled seamless tubes. The formula for weight calculation is: [(Outer Diameter - Wall Thickness) * Wall Thickness] * 0.02466 = kg/meter (weight per meter).