Applications

RACI casing spacers are made of interlocking HDPE segments with no metal bolts or attachments. Engineered with high impact strength and a low coefficient of friction, they guarantee the reliability and success of your underground infrastructure projects.

Engineered for durability and precision, RACI casing spacers provide long-term support for underground piping systems—with published load ratings and corrosion-resistant HDPE that performs where steel falls short.

Water Lines – Protecting Pipes and Restraints in Water Distribution Systems

RACI casing spacers protect carrier pipes and mechanical restraints from contact with the casing, helping to reduce wear and stress in water distribution and transmission mains.

  • Prevents bell joints and fittings from rubbing against the casing wall.
  • Keeps the pipe centered to reduce vertical movement or instability—especially over long spans or in dynamic flow systems.
  • Helps maintain alignment in large-diameter transmission mains, reducing mechanical stress.
  • Spacer selection considers pipe weight (including water content) to ensure long-term performance.
  • Reduces friction during installation for smoother, safer placement.

Proper grade is critical in gravity sewer systems to maintain consistent flow and prevent backflow. RACI casing spacers ensure stable, centered pipe alignment from installation through operation.

  • Maintains grade by keeping the pipe centered inside the casing.
  • Prevents sagging and point loading by evenly distributing the pipe’s weight.
  • Supports long-term stability in soft or unstable soils.
  • Protects against misalignment that could disrupt system performance.

In dual-containment systems, the carrier pipe must be perfectly centered to maintain flow paths, and ensure containment integrity. RACI spacers offer a safe, stable, and chemical-resistant solution.

  • Prevents spacer “bundling” at one end during transport or pull-in
  • Installs in minutes—no on-site fabrication required
  • Maintains centering to avoid wear, misalignment or electrical shorting
  • Custom material options for thermal or chemical resistance
  • Compatible with HDPE, PVC, steel, and specialty materials.
  • Reduces risk of failure in critical chemical or thermal applications.

HDD installs demand constant support through twists, turns and long pulls. RACI spacers maintain full pipe support—no matter how the carrier rotates—while running low-profile in tight casings and minimizing pullback friction.

  • Continuous 360° support—even when the pipe twists during pullback
  • Ultra low-profile runners (down to 0.7″) for tight casing-to-pipe clearances
  • Low-friction design for long-distance pulls without added drag
  • High structural integrity to withstand HDD stresses over miles

In oil & gas pipelines, carrier-pipe longevity and safety are mission-critical. RACI casing spacers use non-corrosive HDPE to protect steel pipes, reduce wear and ensure precise alignment—onshore or offshore.

  • Non-corrosive HDPE provides an extra line of defense against corrosion
  • High load-bearing capacity supports heavy steel carrier pipes without deformation
  • Engineered to fit a range of pipe diameters—including insulated steel pipes—without requiring customization
  • Maintains precise alignment through dynamic pressure and temperature cycles

Projects involving multiple carrier pipes within a single casing typically require custom-fabricated spacers, leading to long lead times and limited flexibility. RACI offers modular casing spacers that can be adapted to support multiple carrier pipe configurations—many of which are available from stock. Whether pipes are arranged in a horizontal, vertical, or triangular pattern, we can work with you to design and supply a solution that reduces project delays and ensures structural integrity.

  • Modular components available from stock—no need for full custom fabrication.
  • Capable of supporting multiple pipes in various layouts within a single casing.
  • Ideal for telecommunications, district energy, or any multi-line utility crossing.
  • Engineering assistance available to review layouts and recommend optimal configurations.