Taiyuan HKX Metallurgy Complete Equipment Co., Ltd. Straight Seam Submerged-Arc Welded Pipe Mill Straight Seam Submerged-Arc Welded Pipe Mill Straight Seam HF Welded Pipe Mill Spiral Welded Pipe Mill Cold Roll Forming Steel Mill Slitting Line Cut To Length Line Spiral Welded Pipe Hydrotester Seamless Pipe Hydrotester Spiral Welded Pipe End Facing and Beveling Machine Straight Seam Welded Pipe End Facing and Beveling Machine Steel Pipe Wrapping Machine Steel Pipe Wrapping Machine Tube straightening machine Straight Seam Welded Pipe Production Line--z1 segment Straight Seam Welded Pipe Production Line--z1 segment Straight Seam Welded Pipe Production Line--z1 segment Straight Seam Welded Pipe Production Line--z1 segment Straight Seam Welded Pipe Production Line--z1 segment