Home> Products > Direct boring steel pipe & Multi phase steel pipe

Main usage
1. Tunnel subsidiary engineering in time of
  constructing road, underground of rail-way
2. Tunnel subsidiary engineering in time of
  constructing underground and the lower
  part of construction parts.
3. Tunnel subsidiary engineering in time of
  constructing tunnel and tunnel's inside
4. Miscellaneous subsidiary engineering
  except engineering for piercing of crushing
  zone, stream, underwater, crumble ground.

Multi phase steel pipe

Out side diameter(mm)	Standard size (m)
165.2 / 139.8 /114.3 /89.1 /76.3 / 60.5 / 50.8	4m, 6m, 8m, 12m Customized by orders
42.7 /38.1 Fore-poling	3m, 4m, 8m Customized by orders