The production process of a spiral welding pipe is relatively simple, the production efficiency is relatively high, and the production cost is also low. Therefore, the spiral steel pipe has developed in many industries. What about welding operation?
Before using the spiral steel pipe, it is necessary to use a deoxidant to do deoxidation, so that the spiral steel pipe will reduce the number and size of the debris during the operation. The steel band is directly welded into a steel pipe.
The shape of the steel pipe can be round or square. The high -frequency welding of the spiral steel pipe is based on the vortex heat effect of the electromagnetic induction and AC charge in the conductor. In the case, due to the destruction of the output current, the designs of magnesium alloy sacrifice anode are best matched with the duration of the pipeline.
In the production of spiral pipes, the relationship between the stability of the molding is very closely related to the quality of welding. Only by improving the quality of the molding, can the welding quality be fully guaranteed. The size and changes of the gap between the spiral steel pipe forming seams are in the welding. To ensure the good appearance molding of the welding of the spiral steel pipe, to a certain melting depth, it is required to be uniformly consistent with the gap between the steel plate. Different welding specifications should be adopted.
In the spiral pipe, due to the crescent bend and "S" bend of the steel belt, the unevenness of the gap between the molding seams is difficult, which brings difficulties to the welding, causing the welding seam depths When changing, when the forming seam is loose, the welds are deep and reduced; when the molding seam is tight, the welds are molten to be small and the remaining height increases. When loosening, reduce the welding specification, and increase the welding specification when the forming is tight.
The anti -corrosion method of the drainage pipe with a spiral pipe also starts from one of the processes. The metal material that is incorporated with the spiral steel pipes with a spiral steel pipe is used to connect with the spiral steel pipe. Therefore, this kind of situation will not occur. The tube should adopt anti -corrosion methods that combine anticorrosive coating and sacrifice anode. For other non -main trunk pipes with lower pressure, the anticorrosive coating method is generally used directly.
At present, there are three layers of PE composite structures commonly used in buried gas pipelines. Epoxy resin powder (FBE), coal coke porcelain paint, epoxy coal asphalt and PE tape. The cost. But it should be noted that when the soil resistivity is too high and the protected pipeline passes through the water, it is not advisable to use the anodes of sacrifice. Different anti -corrosion methods have different anticorrosive quality and costs. . Different purposes and different environments and different gas in it, comprehensively consider anticorrosive methods and anticorrosive costs.
