Equal diameter tee joint weld let compressed air pipeline for you to introduce

The joint weld of equal diameter tee is on the intersecting line of main pipe and branch pipe. Its shape and position are more complex than butt weld, and it is difficult to control the quality of weld during welding. According to statistics, the leakage rate of this kind of welding seam accounts for 80% of the leakage rate of all welding processes. At present, the weld groove on the intersecting line is mainly formed by manual gas cutting or plasma cutting. The machining accuracy is not high, the groove Angle is small, and the welding process parameters are improperly selected, resulting in incomplete welding.

According to the introduction of the compressed air pipeline, another main reason for the quality defect of welding tee is the wrong blanking process, the outer groove of branch pipe is processed into the inner groove, and the branch pipe is directly overlapped on the main pipe for welding. Incomplete penetration reduces the strength of the weld. For the pipeline conveying corrosive media, with the increase of production cycle, the heat-affected zone of the weld will be thinned, leading to the leakage of the weld.

Incomplete penetration reduces the strength of the weld. For the pipeline conveying corrosive media, with the increase of production cycle, the heat-affected zone of the weld will be thinned, leading to the leakage of the weld. The reason of air hole and slag inclusion is that the oil, rust, water and other sundries around the groove before welding were not cleaned, and the skin was not cleaned during welding. In addition, during welding operation, the welding speed is too fast and the welding current is too small, which accelerates the cooling speed of welding seam.

Dalian compressed air pipeline big diameter tee tee is used for branch pipe fittings. For the use of seamless pipe manufacturing tee, the current commonly used technology has two kinds of hydraulic bulging and hot press forming. Hot press forming: hot press forming is to flatten the pipe billet larger than the diameter of the tee to the size of the diameter of the tee, and make a hole in the part of the stretching branch pipe; After heating, the billet is put into the forming die, and the billet is put into the punching die of drawing branch tube. Under the action of pressure, the billet is compressed radially. In the process of radial compression, the metal flows towards the branch pipe and forms branch pipe under the tension of the die.

The reason of air hole and slag inclusion is that the oil, rust, water and other sundries around the groove before welding were not cleaned, and the skin was not cleaned during welding. In addition, during welding operation, the welding speed is too fast and the welding current is too small, which accelerates the cooling speed of welding seam.