Many welded pipe enterprises will see a phenomenon, that is, there are signs of strain on the surface of many welded pipes. These defect traces can not be seen only after grinding and modification by pipe polishing machine. What are the factors that cause the defect of strain? Is it directly related to the welded pipe material and welded pipe mold? Today, let's have a simple chat and discuss it.

It can be said that the tensile defect of welded pipe is a headache in the welded pipe industry. In addition to the technical factors of the master and the design factors of welded pipe mold, the remaining factors are the factors of welded pipe materials. The technical problems of the master can be improved through learning the day after tomorrow, and the design problems of welded pipe mold can also be improved through modification, However, the material factor cannot be modified unless the raw materials are replaced, so the gain is not worth the loss.

If the surface strain of the pipe is caused by the welded pipe material, it is generally caused by insufficient hardness and poor elasticity. As just said, it is impossible for us to replace the material, so we can only increase some processes to reduce or eliminate this impact. At present, a better method is to apply a layer of lubricating fluid on the surface of the welded pipe mold, so that the resistance of the steel strip passing through the surface is reduced and the occurrence of strain is reduced. This method is widely used, which needs to be done in the previous forming stage or add circulating water, depending on the choice of the welded pipe enterprise, When adding lubricant, pay attention to the cleaning behind the steel strip surface, otherwise it will affect the welding.

There are problems and solutions of strain between welded pipe materials and welded pipe molds. Let's talk about these today. The follow-up will continue to be updated for you. Please look forward to it.

Key words:welded pipe mold

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