Mannesmann Line Pipe uses the high-frequency induction (HFI) resistance pressure welding technique for longitudinal welding. The endless strip passes through rolling stands where it is shaped to an open pipe, which runs through a high-frequency inductor consisting of a metal coil with single or multiple windings.

高频焊接是一种焊接工艺，其中用于熔化接合面的热源来自高频 (HF) 交流 (ac) 电阻加热。 用于纵向焊接的高频感应 (HFI) 电阻压力焊接技术。 环形带材穿过轧机机架，在那里它被成形为开口管，该管子穿过由单绕组或多绕组金属线圈组成的高频感应器。 结果，高频环流被感应到管子中，该管子优选地在汇聚在焊接点的带材边缘处闭合。 焊接所需的温度由沿带钢边缘的狭窄区域的电阻加热产生。 加热后的钢带边缘被压辊挤压在一起，形成均匀的纵向焊缝，无需任何填充金属。 …

Our high frequency induction (HFI) line pipe benefits from stringent dimensional control of both shape and thickness - ensuring excellent welding rates for onshore and, critically, offshore installation. We supply HFI pipe in: Fully tested for product confidence.

Salzgitter Mannesmann Line Pipe GmbH (MLP) addressed the situation by searching for an alternative material concept therefore enabling the production of longitudinal welded pipes via the high frequency induction (HFI) welding process.

HFI steel pipes from Salzgitter Mannesmann Line Pipe are used for standard to extremely demanding applications in foundation work. Here they are needed in projects of all sizes where addi-

High-Frequency Induction (HFI) welding is a critical process for producing longitudinally welded steel pipes, offering high efficiency, superior quality, and adaptability across

电熔焊接（EFW钢管）是指电子束焊接，利用高速运动将电子束定向的冲击动能转化为热量加热工件，使工件离开熔体，形成焊缝。 它主要用于焊接异种钢焊接薄板或高功率密度的金属焊件，可以迅速加热到高温，可以熔化任何难熔的金属和合金。 深熔焊速度快，热影响区极小，因此对接头的性能影响很小，接头几乎没有变形。 但是由于使用X射线进行焊接，因此对特殊的焊接室有要求。 电阻焊（ERW钢管）：焊接构件的组合是通过电极施加压力，利用电流通过接触面的接合区 …

2021年5月22日 · High-frequency induction welding (HFIW) is among the most commonly used methods for producing roll-formed pipes. In this paper, weld quality is evaluated through examining the weld properties, in order to obtain the effect …

As a leading specialist for longitudinally HFI-welded steel pipes with an extensive range of dimensions and grades, Mannesmann Line Pipe manufactures high-quality steel pipes for companies all over the world at its plants in Siegen and Hamm.

Information about the longitudinally electric resistance welded (erw) steel pipes (industrial, water, and towel warmer pipes) and profiles (square, rectangular, and D profiles) produced by Noksel Çelik Boru Sanayi A.Ş. in the Hendek factory.