Related knowledge about high frequency welded pipes

Straight seam high-frequency welded steel pipe has the characteristics of relatively simple process and fast continuous production. It has a wide range of uses in civil construction, petrochemical, light industry and other fields. It is mainly used to transport low-pressure fluids or manufacture components and light industrial products for various projects.

High-frequency welding is a kind of induction welding (or pressure contact welding). It does not require weld filler, has no welding spatter, has a narrow welding heat affected zone, beautiful welding shape, and good welding mechanical properties and other advantages, so it is called Widely used in steel pipe production.
In welding, equipment is used to convert low power into high frequency power to complete the melting and welding process of solid metal. In high frequency welding, impedance as well as pressure roller and tube blank heating. Therefore, in order to ensure welding efficiency, it is necessary to control the interaction of the coil, impedance and rolling mill to optimize the welding process and ensure that the power consumption during the welding process is within a reasonable range. This is what must be paid attention to in high-frequency welding technology.
Analysis of high frequency welding principles
The so-called high frequency in high-frequency welding refers to the current with a frequency of 50KHz-400KHz. Such a current will have two effects on the metal. One is the skin effect: unevenness occurs when high-frequency current passes through a conductor. And the density of the conductor surface is large but the inside is small, which is the skin effect; one is the proximity effect, where high-frequency current flows in opposite directions between adjacent conductors. Even if the other side is shorter, the current will be concentrated to the edge. Will flow to the shorter side, creating a proximity effect. These two effects are the basis of high-frequency welding. High-frequency welding uses the skin effect to concentrate high-frequency current on the working surface, and uses the proximity effect to control the loop position and range of the high-frequency current, thereby heating and melting adjacent steel plates to complete the welding.
What is the difference in appearance between high-frequency welded pipe and welded pipe?
High-frequency welded pipes are a type of welded steel pipes. Therefore, there are certain differences between high-frequency welded pipes and welded steel pipes as a whole, but they are the same in main categories.
High-frequency welded pipes are divided into the following four types:
1. Welded steel pipes used for low-pressure fluid transportation are also called ordinary welded pipes, often called clarinets.
2. Galvanized welded steel pipes used for low-pressure fluid transportation are also called galvanized welded steel pipes, commonly known as white pipes.
3. Ordinary carbon steel wire sleeves are steel pipes used to protect wires in electrical installation projects such as industry, civil construction, and mechanical equipment installation.
4. Straight seam electric welded steel pipe refers to a steel pipe in which the welding seam is parallel to the longitudinal direction of the steel pipe.
Steel pipes are usually divided into two categories, one is welded steel pipe and the other is seamless steel pipe. Welded steel pipe is also called welded pipe. They are steel pipes made of steel or strip after crimping. Welded pipes are divided into: straight seam welded pipes and spiral welded pipes.
The materials are divided into: galvanized welded steel pipe, stainless steel welded steel pipe, of course! The surface quality and dimensional tolerances of welded pipes produced with different materials and processes are different.
High-frequency welding technology uses changes in current frequency to produce skin effects and proximity effects on metals, causing the metal to melt and complete the weld. Therefore, controlling its current is the most important technical parameter. The above analysis is for high-frequency welded pipes. The main technical parameters that need to be controlled in this process and their technical characteristics indicate that to reduce energy consumption, impedance, frequency, induction coils, etc. must be comprehensively adjusted. Used to ensure welding quality.