Basic Knowledge About Electric Resistance Welded Pipe
Electric Resistance Welded Pipe is that after the hot -rolled rolling rolled plate is formed, it uses a high -frequency current skin collection effect and neighboring effect to heat the edges of the pipe blank to heat and weld it under the action of squeezing rollers to achieve production products. The Feature of Electric Resistance Welded PIPE is that: Large welding speed, small welding thermal affecting area, welding can not be cleaned up to the workpiece, can be welded with thin wall tubes, and can be welded with metal tube.
In fact, Electric Resistance Welded Pipe is not the same as the welding process of ordinary welded pipes. If you want to know about the different of them, you can read this passage: Difference Between ERW Pipe and Welded Pipe. The welds are melted from the parent material of the steel band. The mechanical strength is better than the general welded pipe. The appearance is smooth, high accuracy, and low welding seams in low cost, which is beneficial to the cover of 3PE anticorrosive coating. Electric Residence Welded Pipe is significantly different from the welding method of buried arc welded pipes. Because welding is completed at high speeds, the difficulty of welding quality is much higher than the buried arc welding method.
The Process of ERW PIPE and MS ERW PIPE mainly depends on product varieties. From raw materials to finished products, they need to go through a series of processes to complete these processes. There are many reasonable arrangements for different process processes. Typical processes of high -frequency welding pipes: longitudinal shear -open roll -with steel smoothing -head and tail shear -band steel pair -welded storage -molding -welding -clearing the burrs -fixed Trail -Detective -Flying Cut -the Preliminary Examination -Steel Pipe Straach -Pipe Section Processing -Water pressure test -detection -printing and coating - finished product.
Welding pressure is one of the main parameters of the welding process. Electric Resistance Welded Pipe is heated to welding temperature, and a common metal grain is formed under squeezing pressure to crystallize each other to generate welding. The size of the welding pressure affects the strength and toughness of the weld, Also Affects The Quantity of Ms ERW PIPE. If the welding pressure applied by it is small, the edge of the metal welding cannot be fully compressed. Non -metal miscellaneous materials and metal oxides remaining in the welds are not easy to discharge due to low pressure, reduced weld strength Most of the metals that reach the welding temperature are squeezed out, which not only reduces the strength of the weld, but also produces defects such as excessive internal and external burrs or welding. Therefore, the best welding pressure that is adapted to it should be obtained according to different varieties specifications. The welding pressure based on practical experience is generally 20 ~ 40MPa.
Due to the tolerance of the width and thickness of the tube, and the fluctuation of the welding temperature and the welding speed, it may involve changes in welding and squeeze pressure. The welding squeeze volume is generally controlled by adjusting the distance between the squeezing roller, and it can also be controlled by the squeeze roller front and rear tube tube.
The welding speed is also one of the main parameters of the welding process. It is related to the heating system, the deformation speed of the weld, and the mutual crystallization speed. When high - frequency welding Electric Resistance Welded Pipe (Also Called MS ERW Pipe), the welding quality increased with the welding speed. This is because the shortening of heating time makes the width of the edge heating area narrowing, shortening the time for forming metal oxides. If the welding speed is reduced, not only the heating area becomes wider, but the width of the melting area changes with the change of the input heat, forming the internal internal The burrs are large. In low -speed welding, input less heat makes it difficult to weld, and defects are prone to occur if it does not meet the specified value. Therefore, at the maximum speed allowed by the unit's mechanical equipment and welding devices, select according to the maximum speed of different specifications according to different specifications. Appropriate welding speed.
Electric resistance welded pipe(also called ERW Pipe) plays an imoortant role in construction industry and industry, ms erw pipe has many applications. If you want to buy electric resistance welded pipe, you can find some excellent and famous erw pipe manufacturer, such as tjyct steel co., ltd which is a reliable erw pipe manufacturer. Tjyct steel co., ltd provides prime quality erw pipe in all sizes and all material. What’s more, tjyct steel co., ltd has factory price for sale!