Straightening process of No. 45 seamless pipe

For the No. 45 seamless pipe that has just been produced, the curvature is relatively large, so it is necessary to straighten the No. 45 seamless pipe. Let’s take a look at the straightening process of the No. 45 seamless pipe.

The 45-degree seamless pipe that has been processed into products now has a small degree of tortuosity, and it has to rely on a mechanical east-west straightening machine to complete it. Therefore, in order to eliminate the twists and turns of the seamless pipe of q345b, all q345b steel pipes need to be cold straightened.

The basic principle of 45 seamless pipe straightening is to make the seamless pipe elastoplastic tortuous, from a large tortuous degree to a small tortuous degree. Therefore, the steel pipe must be repeatedly tortuous in the straightening machine. The degree of repeated twists and turns of No. 45 seamless pipe is mainly determined by the adjustment of the straightening machine.

The twists and turns of No. 45 seamless pipe are caused by improper adjustment of the rolling mill, residual stresses during rolling, and because of uneven cooling along the section and length of the pipe. Therefore, it is not possible to obtain very straight pipes directly from the rolling mill, as long as the tortuosity of the pipe is straightened by cold to satisfy the rules of skill conditions.

After straightening, the NO. 45 seamless tube is considered to have completed the entire production process, can be sold on the market, and can play its maximum role in the use process.