What's the difference between high frequency welded pipe and low frequency welded pipe?
There are significant differences between high-frequency welded pipe and low-frequency welded pipe in many aspects, mainly in welding principle, welding effect, application field, advantages and disadvantages, etc.
一,Welding principle
High-frequency welded pipe: the edge of steel plate is melted and compressed by high-frequency current transfer heating. The frequency of high-frequency current is usually between 50KHz and 400KHz. The skin effect and proximity effect are used to concentrate the high-frequency current on the working surface, so that the adjacent steel plates are heated and melted, and the welding is completed.
Low-frequency welded pipe (Note: Although low-frequency welded pipe is not a common term, it is assumed here that it refers to a welded pipe that uses low-frequency current for welding): Its welding principle may involve low-frequency current heating, but the specific method may vary with the process and equipment. Generally, low-frequency welding may not be as fast and efficient as high-frequency welding because it generates less heat and is more evenly distributed.
二,Welding effect
High frequency welded pipe: fast welding speed, high production efficiency and stable welding quality. Due to the effect of high frequency current, the welded pipe has smooth surface, no defects, high diameter accuracy and good dimensional stability. At the same time, high-frequency welding has high welding strength, strong corrosion resistance and long service life.
Low frequency welded pipe (hypothesis): the welding speed may be slow and the production efficiency is relatively low. The welding quality may be different due to different process control, but it usually has good corrosion resistance and high welding quality (especially in occasions with high requirements for welding quality).
三,application area
High-frequency welded pipe: Because of its excellent performance and wide applicability, high-frequency welded pipe is widely used in construction, machinery, chemical industry, electric power, transportation and other fields. In the field of architecture, high-frequency welded pipes are used to make various structural parts and pillars, load-bearing walls, guardrails, etc. In the industrial field, it is used to manufacture oil pipes, cooling pipes, transmission shafts, support frames, racks and other parts of machine tools, automobiles, railway vehicles and other equipment; In the field of electric power, it is used in transmission lines, power generation equipment, power equipment and other fields.
Low-frequency welded pipe (hypothesis): Although the specific application field of low-frequency welded pipe may vary according to the process and equipment, it is usually suitable for occasions with high requirements for welding quality and relatively low requirements for cost and speed. For example, low-frequency welded pipes may be needed in petrochemical industry, offshore platforms and other fields to ensure welding quality and corrosion resistance.
四,advantages and disadvantages
High frequency welded pipe: Advantages: fast welding speed, high production efficiency, stable welding quality, strong corrosion resistance and long service life. Disadvantages: due to its high frequency of use, it is easy to produce electromagnetic interference and thermal deformation, so it is necessary to strengthen the requirements for working environment and operation technology.
Low frequency welded pipe (hypothesis): Advantages: high welding quality and good corrosion resistance (under specific process). Disadvantages: the welding speed is slow, the production efficiency is relatively low, and the cost may be higher (compared with high frequency welded pipe).
To sum up, there are obvious differences between high-frequency welded pipe and low-frequency welded pipe in welding principle, welding effect, application field, advantages and disadvantages. When selecting, comprehensive consideration should be made according to specific needs and scenarios.
