The vertical steel pipe straightening machine is a metallurgical device used to straighten metal profiles, bars, pipes, wires, and so on. The main types include pressure straightening machines, balanced roller straightening machines, and inclined roller straightening equipment. The machine features a vertical setup with bidirectional drive, equipped with two sets of staggered straightening rollers that squeeze the steel pipe. Through changes in angles, the pipe undergoes continuous elastic deformation to correct bending defects. Standard models can achieve a straightening accuracy of up to ≤0.3mm/m.

Welded steel pipes are made by bending steel plates or steel strips into shape and then connecting the seams using welding. According to the welding method and usage, they can be divided into the following three types: I. ERW (Electric Resistance Welded) Steel Pipe and Tube Mill II. Spiral Welded Steel Pipe (SSAW Tube Mill) III. Other special welded steel pipes Line

Recently, the large oil and gas pipeline bending machines was made by ACA group, After on-site inspection and approval by Kazakh technicians, the pipe bender equipment was loaded and shipped to Kazakhstan.

The challenges in large-diameter longitudinal seam welded pipe production lines mainly focus on four core areas: Steel plate forming, welding, finishing, and inspection. Below, we will mainly introduce our ACA- LSAW (Longitudinal Submerged Arc Welded) pipe production line’s forming methods and technical challenges.