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Steel pipe seam heat treatment


Date:

2023-08-24

Weld seam online annealing is an advanced process for the production of high-grade steel pipes. The steel pipe weld seam is heated above the critical temperature, and then annealed to eliminate welding residual stress and improve the microstructure, so that the weld seam and its heat affected zone have the same microstructure, toughness, and strength properties as the base material.

Steel pipe seam heat treatment
Steel pipe seam heat treatment
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  • Steel pipe seam heat treatment
  • Steel pipe seam heat treatment
  • Weld seam online annealing is an advanced process for the production of high-grade steel pipes. The steel pipe weld seam is heated above the critical temperature, and then annealed to eliminate welding residual stress and improve the microstructure, so that the weld seam and its heat affected zone have the same microstructure, toughness, and strength properties as the base material.
Applicable scope
  • Applied for online heat treatment of weld seam for petroleum transportation pipes, high-pressure fluid pipes, and other high-quality steel pipes.
Technical characteristics
  •  Adopt IGBT solid-state medium frequency power supply with a working frequency of 1-3kHz, with simple power supply structure, high heating efficiency, and excellent weld seam heat   treatment effect.
  •  IGBT solid-state MF power supply has automatic load matching function on the inverter side, which can adapt to steel pipe seam annealing with different pipe diameter and wall   thickness to ensure the power output capacity.
  •  The mechanical positioning table can automatically adjust the gap between the inductor and the weld seam in real-time, and equipped with fast lifting mechanism for the inductor, which can avoid collision between the inductor and the steel pipe with high safety.
  •  Adopt PLC + HMI and high-precision pyrometer to achieve temperature closed-loop control of weld seam, which can accurately control annealing temperature.
  •  Weld seam automatic tracking system is optional.
Typical picture—steel pipe seam annealing
 

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