Welding procedure for seamless pipes

In accordance with the different processes of production, seamless steel pipe is parallel to the longitudinal weld steel pipe steel pipe, usually divided into metric welded steel pipe, welding thin-walled tube, transformer cooling tubing. Seamless steel pipe has a different use of the value and role of seamless steel pipe in use, in accordance with the appropriate method to use and welding used in the welding process and precautions, welding procedure for seamless pipes needs to be carried out in accordance with the production process.
The seamless high frequency welded steel pipe processing technology is relatively simple, rapid, continuous production in the production process is simple and convenient, in accordance with the process of production and processing. Seamless steel pipe is widely used in civil construction, petrochemical, light industry and other sectors, low-pressure fluid used for transport or made into a variety of engineering components and light industrial products, play an important role in different industries and value, to show good characteristics and performance.
Seamless steel pipe production process
Seamless steel pipe by high-frequency welding unit the strip strip certain specifications volumes into round tubular and seamless welded steel pipe, welding processes and technologies. Welding seamless steel pipe when the shape of the steel tube can be circular, can also be a square or profiled, sizing rolling after the selection of the tube depends on the welding of the welded steel pipe material, the material of the steel pipe, the main production and processing technology will be different, the attention to the processing of the material is low carbon steel and σs ≤ 300N/mm2 σs ≤ 500N/mm2 low alloy steel or other steel. The welding technology is relatively simple, seamless steel pipe production and processing technology to ensure that play an important role in the use and value, it represents good value.
Seamless steel tubes for high-frequency welding technology
The high-frequency welding is a seamless steel pipe according to the principle of electromagnetic induction, and AC charge in the skin effect of the conductor and the proximity effect and eddy current heating effect, so that the weld edges of the steel locally heated to a molten state, and the rollers squeeze the butt welding the purpose of high-frequency welding seam crystal coupling, so as to achieve the weld is an induction welding (contact or pressure welding), it does not require the weld filler, weld spatter, narrow weld heat affected zone, welding forming beautiful subject to a wide range of applications the welding good mechanical properties, etc., in the production of steel pipe seamless steel pipe of high-frequency welding is the use of alternating current skin effect and proximity effect, steel (steel) after roll forming to form a section off a circular tube, in the tube near the induction coils near the center of rotation or a group the impedance (Cibang), an electromagnetic induction circuit is formed by the impedance with the blank tube openings in the skin effect and proximity effect, under the action of the edge of the blank tube openings generating a strong and concentrated thermal effect, so that the weld edges welding rapidly heated to the desired temperature after extrusion by the pressure roller, the molten state of the metal crystal indirectly together, cooling to form a solid after docking weld.
Seamless steel pipe welding technology needs to grasp and control during welding, to ensure that the welding steel pipe without quality and performance issues and quality, play an important role and value in use.