Precision tube is a high-precision, high-brightness seamless steel tube produced by cold drawing or cold rolling. The inner and outer diameters can be accurate to within 0.2mm or even higher. The surface finish is high and suitable for occasions with high requirements for surface quality. It is light in weight and has excellent mechanical properties and processing properties while ensuring bending and torsional strength. Its mechanical properties and processing properties can be further improved by heat treatment processes such as normalizing, quenching, and tempering.

The precision rolled tube is a seamless steel tube that uses a fine rolling process to ensure the surface smoothness and dimensional accuracy of the inner and outer walls of the tube meet international standard requirements. The outer diameter tolerance of conventional products can be controlled within ±0.05mm, and the wall thickness tolerance is within ±0.1mm; and special industries have higher requirements. It has excellent comprehensive performance, can withstand high pressure, and does not crack or wrinkle during deformation processes such as cold bending, flaring, and flattening. It can perform various complex deformations and mechanical processing, which improves production efficiency and product quality.

Precision drawn tube is formed into a tube by mechanical force and drawing force. Specifically, precision-drawn tube is formed into tube by heating the billet from round to manufacturing temperature and then using multiple drawing machines in the pipeline. In this process, the billet is stretched and forged into tube. During the processing of precision drawn tube, the minimum diameter can reach 0.1 mm. The surface of precision drawn tube is smooth, without an oxide layer, and the shape and size of inner and outer walls are controlled very accurately.

Precision rolled tube is made of tube by mechanical rolling. Specifically, the precision rolled tube is first rolled into a mother tube with billet in cooling state and then continuously rolled by multi-pass rolling mill to form it into tube with specified size and shape. Compared with cold drawing method, rolling method has faster processing speed and higher production efficiency.
The surface of a precision rolled tube is relatively rough, but the inner and outer diameter size accuracy is easier to control, and the minimum diameter can reach 0.8 mm. Compared with precision drawn tube, precision rolled tube has lower production cost, but its product strength and dimensional accuracy are relatively low.

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