In the production of ERW pipeline, there is a process called roll adjustment. In the process of production, the rolls are damaged or worn seriously. It is necessary to replace some rolls on the parts, or to produce a certain number of rolls continuously to meet the needs of the whole roll replacement. At this time should be conditioning roll, in order to achieve excellent steel quality. If the roll adjustment is not good, it is easy to change the seam of steel pipe, overlap welding, edge wave, indentation or scratch on the surface of drum sleeve and tube body, elliptical steel pipe and other shortcomings, therefore, roll change should grasp the tips of coil conditioning.
 
1. Replacing standard steel pipes usually requires replacing the whole roll. The adjusting method of drum is to draw a baseline from the entrance to the exit of the wire and adjust it so that each hole is on a baseline and the forming line meets the technical requirements. Replace the standard drum, first adjust the forming roll, guide roll, kneading roll and sizing roll, then close the forming roll, guide roll and kneading roll.
 
2. The function of the guide roller is to control the direction of sewing and the height of the bottom of the pipe, so as to alleviate the extension of the edge, control the rebound of the edge of the pipe, and ensure the seamless transformation of the pipe into a drum. If the guide roll is not well adjusted, the joint of steel pipe is easy to change, lap welding, edge wave and other welding shortcomings in the process of steel pipe welding.
 
3. Kneading roll is the key equipment of pipeline unit. Its function is to heat the edge of pipe to the welding temperature of kneading effect of kneading roll under the pressure at the end of pressure welding. In the production process, the opening angle of kneading roll should be controlled. When the kneading force is too small, the strength of the welded metal decreases and cracks occur after applying force.  When the kneading force is too large, the welding strength decreases and the amount of external burrs increases, which makes it easy to form welding defects such as lap welding.
 
4. During the slow start-up process of pipeline unit, attention should be paid to all parts of the rolling conditions of rolls, and the rolls should be adjusted at any time to ensure the quality of welded pipes, and the welding technology and standards meet the requirements.