Prevalent Pipeline Repair Methods and Their Drawbacks

Before Duraliner™… How would you fix this?

Structural:

• trench replacement
  • major surface disruption at high cost
  • elevated risk of damage to adjacent utilities
• pipe bursting
  • can increase size but may disrupt surface and impact (damage) adjacent utilities
  • extremely difficult to pipe burst ductile iron water lines
  • there are often restraining fittings and concrete thrust blocks that prevent bursting
• slip lining
  • reduces inside pipe diameter
  • can reduce flow rate

Semi-structural:

• close-fit lining
  • relies on host pipe for structural support
  • requires a thick walled liner which greatly reduced inside diameter and flow rate
  • Offers very little protection against external corrosion
• cured-in-place
  • relies on host pipe for structural support
  • offers no protection against external corrosion

Non-structural:

• cement-mortar lining
  • reduces inside pipe diameter
  • not good for acidic or hard water
  • does not stop leaks
  • adds no structural life to host pipe
  • offers very little protection against external corrosion
• epoxy-resin lining
  • reduces inside pipe diameter
  • does not stop all leaks
  • cannot guarantee uniformity of application
  • adds no protection against external corrosion