Tube

A tube is a hollow product with a uniform cross-section and consistent wall thickness. It can be supplied in straight lengths or coil form. The cross-section may be round, square, rectangular, polygonal, or elliptical. Manufacturing processes include extrusion, skew rolling, drawing, or roll forming—either individually or in combination. Bent, threaded, or tapered products are also considered tubes if they meet this definition. Tubes are widely used in industries such as mechanical engineering, construction, and energy supply. The term pipe is often used synonymously, though it may imply specific standards or applications in some industries.