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Double Wall Corrugated Steel Pipe

Double Wall Pipe (steel lined) is fabricated in full circular cross section with a smooth steel liner and a helically corrugated shell integrally attached at the lock seams from end to end of each length of pipe. The corrugated steel shell of Double Wall Pipe supplies the structural strength of standard CSP, while a smooth interior liner provides improved hydraulics with a Manning’s “n” of 0.012. This combination makes Double Wall Pipe an excellent economical solution in many difficult situations such as weak soils, poor subsurface drainage conditions steel slopes and high fills.

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The many benefits of this Double Wall Corrugated Steel Pipe are:

  • Hydraulically superior to standard corrugated steel pipe with a Manning’s “n” of 0.012<
  • Long lengths and fewer joints
  • Light weight
  • Structural capacity
  • Easy installation
  • Available in diameters from 18″ – 138″

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For more information on Double Wall Corrugated Steel Pipe, check out the Corrugated Steel Pipe Design Manual or send us your questions through our Answer Desk.

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