Seamless high-pressure boiler tube rolling process

Heating of tube embryo:

Heating is the first step in the rolling process, and its purpose is to bring the tube blank to a temperature suitable for rolling. During the heating process, the heating speed and temperature need to be strictly controlled to ensure that the tube blanks are heated evenly and to avoid overheating or underheating.

Perforation:

Perforation is an important step in the rolling process. The heated tube blank is pierced by a piercing machine to form a hollow Tube blank.

During the perforation process, the perforation temperature and perforation speed need to be controlled to ensure perforation quality and wall thickness uniformity of the tube blank.

Rolling:

Rolling is a key step in forming the tube blank into the required specifications and shapes. During the rolling process, the tube blank is pressed by rollers to gradually deform it to achieve the required size and accuracy.

During the rolling process, the rolling force, rolling speed and roll accuracy need to be strictly controlled to ensure the quality of the steel pipe.

Online test:

Online inspection is an integral part of the rolling process and is used to monitor the quality and size of steel pipes in real time.

Commonly used online detection methods include ultrasonic detection, through-probe detection, etc. These methods can effectively reveal cracks, defects and impurities inside the pipeline, ensuring that the quality of the steel pipe meets standards.

Magnetic leakage inspection:

Magnetic flux leakage inspection is a detection method for surface defects of steel pipes. It uses the principle of magnetic field to detect the leakage magnetic field of the magnetized part of the pipe, thereby discovering defects on the surface of the steel pipe.

Magnetic flux leakage inspection has the characteristics of high sensitivity and fast detection speed, and is suitable for automatic inspection of a large number of steel pipes.

Through this series of steps, seamless high-pressure boiler tubes are accurately rolled to ensure that their quality and performance meet the strict requirements of high-pressure boilers. These steel pipes are widely used in high temperature and high pressure environments in energy, chemical and other fields.