(1) When steel pipes are rolled, the gantry crane installed in the processing plant is used for rolling. Firstly, the steel plate is slowly sent to the plate bending machine by using the gantry crane of 10T, and the positions of the trolley and the plate bending machine are adjusted. During the rolling process, the trolley and the drum keep the same speed, and the prepared template is used to monitor the radian of the steel pipe and adjust the distance between the upper and lower shafts of the rolling mill at any time; When the steel plate is rolled to a certain length, the rolled part will be lifted by the gantry crane, so that the steel plate will not be deformed due to its own weight. After the coil is formed, level the joint with a fixture and spot weld firmly. At the same time, temporary supports with the same length as the inner diameter of the pipeline will be fixed on both sides of the nozzle to prevent deformation during hoisting.
(2) Bend pipe making: When making a bend pipe, adjust the upper roller of the bending machine to a certain inclination angle, and roll it according to the bisector of the radians of the long and short sides. While rolling, check the position of the nozzle plane with two templates with different radii. After a section of steel plate is formed by rolling, continue to rotate the steel plate to the next bisector to continue rolling; When the elbow is rolled, the curvature of some places may be too large or too small, so it is necessary to correct the curvature of the elbow with flame. After the arc correction is completed, the nozzles at both ends are reinforced with temporary supports. After each section of the elbow is processed, it should be pre-assembled at the processing site, and transported to the site for sectional installation after passing the inspection.
(3) After the steel pipe coil is formed, in order to prevent natural deformation, it is directly hoisted to the welding platform by gantry crane for welding.
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