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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