Bending and straightening methods of carbon steel pipes

The bending and straightening methods of carbon steel pipes mainly include the following:

Bending method:

1. Hot bending method: This is a commonly used bending method. The steel pipe is softened in local areas by heating and then bent. Bending is usually performed at 800~1000°C, and the heating range and temperature need to be strictly controlled to avoid overheating. For carbon steel, the temperature range during hot bending is generally 750~1050°C. The heating should be slow and even to ensure that the pipe is heated through and to prevent overburning.

2. Cold bending method: suitable for thin-walled and small-diameter steel pipes. Using a bending machine to bend steel pipes into shape at room temperature requires precise control of the bending centerline.

3. Multiple bending method: Dividing a right angle into multiple small angles for stepwise bending can help reduce changes in pipe wall thickness.

Filling method: Fill the inside of the bend with sand and other substances to increase the compressive strength of the pipe.

Straightening method:

1. Wrench plate straightening: suitable for slightly bent steel pipes. Fix the steel pipe on the wrench plate and gradually return it to a straight state by pulling. After completion, check whether there is any damage on the surface of the steel pipe.

2. Roller straightening: an efficient and precise straightening method, especially suitable for severely bent steel pipes.

When bending and straightening carbon steel pipes, it is necessary to select the most appropriate method based on the material, specifications, bending degree and specific application scenarios of the steel pipe, and strictly follow the operating procedures to ensure the quality and safety of the steel pipe. In addition, attention should be paid to safety during operation to avoid accidents.