High frequency straight seam steel pipe manufacturing process

Author : admin

Update time : 2022-07-13 11:10:19

　　High frequency straight seam steel pipe is based on the electromagnetic induction principle and ac charge in the conductor skin effect, near effect and eddy current heat effect, so that the weld edge of the steel locally heated to molten state, through the roller extrusion, so that the butt weld to achieve indirect crystal, so as to achieve the purpose of weld welding. High frequency welding is a kind of induction welding (or pressure contact welding), it does not need welding filler, no welding splash, narrow welding heat affected zone, beautiful welding forming, welding machinery function is good, so it is widely used in the production of steel pipe.

　　The high-frequency welding of the steel tube is the use of skin effect of alternating current (ac) and the adjacent effect, steel (strip) after rolling forming, form a cross section of broken circular tube billet, in the middle of the tube billet inside near the induction coil rotating around one or a set of impedance (magnet) and impedance and tube billet was reluctant to form an electromagnetic induction loop, under the action of skin effect and the adjacent effect, A strong and concentrated thermal effect is produced at the edge of the opening of the billet, which makes the edge of the weld rapidly heated to the temperature required for welding. After extrusion by the press roller, the metal in the molten state realizes indirect crystallization and forms a firm butt weld after cooling. High frequency straight seam steel pipe manufacturing process.

Previous : Difference between seamless pipe and non seamless pipe

Next : What matters should be paid attention to when using seamless steel pipes in industrial production

Working Pressure of Seamless Steel Pipe

Sep .17.2026

　　Seamless steel pipe actual bearing pressure may be affected by many factors such as the quality of the pipe, processing technology, and use environment Please feel free to contact us if you have any questions Email : pipe@stpipefitting.cn
(SMLS pipe) is a type of pipe produced without welds by deforming the metal as a whole using piercing and rolling techniques. Compared to welded steel pipe, its core advantage stems from the continuity of the material and the uniformity of its structure, providing superior reliability and safety under high pressure, high temperature, and complex stress environments. This makes seamless steel pipe a fundamental and reliable material in the petroleum, chemical, natural gas, and power industries for critical processes and the transportation of hazardous media.

Seamless carbon steel pipe Sch 40

Sep .15.2026

Seamless Carbon Steel Pipe Sch 40 (Schedule 40) is a seamless steel pipe specification that meets the American standard. Its pipe wall thickness is Sch40 (corresponding to the standard wall thickness series), which represents the standard wall thickness under a specific pressure level and is often used in occasions with higher pressure and temperature.

Schedule 80 Carbon Steel Pipe: Thickness, Dimensions & Weight in mm

Sep .10.2026

Schedule 80 Carbon Steel Pipe is made up of carbon steel materials. The carbon steels can vary in composition based on the grades. The strengths and the toughness vary. To have an international and equal identification of the pressure capacities of the pipes, the schedule scale is used. The wall thickness grades of the steel pipe range from Schedule (SCH) 5 to Schedule (SCH) 160. SCH 5 has the lowest pressure resistance, while SCH 160 has the highest.

Steel Pipe Sizes Explained: NPS, OD and Wall Thickness

Sep .08.2026

Steel pipe sizing can be confusing, especially for buyers who are new to piping specifications. A pipe's designated size often differs from its actual dimensions, which can lead to mistakes during purchasing or design.

Have Any Questions?

DON'T HESITATE TO CONTACT US ANY TIME.