How Should The Pipelines in The Hydraulic Station System Be Installed Properly?

Pipes are one of the key components of the hydraulic station system. Therefore, the installation of hydraulic pipes is a crucial project in the installation of equipment for the hydraulic station system. The quality of pipeline construction is one of the key factors that will affect whether the performance indicators of the hydraulic station system are normal during operation.

When designing and laying out pipelines in the hydraulic station system, one should first base it on the hydraulic schematic diagram and comprehensively consider all the connected components, hydraulic systems, three-way joints, and flanges required. The pipeline materials used must have clear initial basis based on the original data. For pipelines with unknown data, they are not allowed to be used.

For the pipelines with a diameter of 50mm or less in the hydraulic station system, they can be cut using a grinding wheel and then laser-cut. For pipelines with a diameter of more than 50mm, the general method of mechanical processing should be adopted for laser-cutting. If oxy-cutting is used, the part caused by the structural transformation due to oxy-cutting must be removed by the processing method, and at the same time, the welding seam for electric welding can also be machined out. Except for the return oil pipe, the working pressure of the pipeline is not allowed to be cut using the roller-type compression method for laser-cutting. The surface of the pipeline laser-cutting must be leveled, and burrs, oxide scale, and slag must be removed. The surface of the wound layer and the centerline of the pipeline should be vertical. ?

How should the pipelines in the hydraulic station system be installed properly?

For pipes with a diameter less than 30mm, the cold bending steel method can be selected. When the pipe diameter is between 30 and 50mm, the cold bending steel method or the hot bending method can be used. When the pipe diameter exceeds 50mm, the hot bending method is generally adopted. When using the butt welding method for the hydraulic transmission system pipeline, the inner cavity of the welding must be higher than the pipeline by 0.3 to 0.5mm. No situation of concave inner cavity is allowed. After welding, use a file or a portable grinding wheel to smooth the higher welding in the inner cavity. Remove the weld scars and burrs, and achieve a lubrication level.

During the welding operation, exposure to wind, rain and snow should be avoided. After welding the pipes, for welds with a wall thickness not exceeding 5mm, it should be cooled naturally at room temperature. Forced cooling by strong wind or sprinkling water is not allowed. The weld should be fully penetrated and the surface should be uniform and flat. For the welding of type II pressure vessels, sampling and flaw detection inspection should be carried out.

After the hydraulic station system is installed in the pipeline, welded, and pre-installed, it is disassembled again for phosphating treatment. The pipelines that have undergone phosphating treatment will be exposed to hot air inside the pipeline for rapid drying. When reassembling into the system software and entering gear oil in the pipeline, no rust prevention treatment is usually required, but they should be properly stored. If it needs to be stored for a long time, a rust preventive coating must be applied. However, this can only be done after 48 hours of acid washing and phosphating.