WHY REMOVE THE BEAD?

Eliminate the bead. Eliminate the problem.

External HDPE beads are removed primarily for aesthetic reasons, to allow for easier slip-lining into older pipes, to enable better inspection of the weld joint, and sometimes for specific structural/functional needs like in conduit systems, though internal bead removal is more common for flow optimization. The removal process, called debeading, creates a flush surface, improving performance in specific applications without harming the pipe's pressure rating.

Key Reasons for External Bead Removal

• Aesthetics: For visible applications, like bridge cable covers, removing the bead provides a cleaner, smoother look.

• Slip-lining: When inserting a new, smaller HDPE pipe into an existing larger pipe, removing the external bead allows the new pipe to pass through more easily.

• Inspection: Removing the external bead is necessary to perform non-destructive testing (NDT) methods, like microwave scanning, to check for fusion defects.

• Conduit Systems: In cable conduit work, removing the bead can sometimes reduce material costs by allowing smaller pipes to be used, though this is also a benefit of internal removal. 

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Key Reasons for Internal Bead Removal

• Flow Optimization: Removing the internal bead creates a smoother interior, preventing blockages and improving flow in low-grade gravity lines.

• Pigging Operations: A smooth bore allows pipeline "pigs" (tools for cleaning/inspection) to pass through without getting stuck

It is common to remove the interior bead in gravity sewer applications where the slope of the pipe is <2% grade. Removing the internal/external bead is an observed and effective practice in mining operations, horizontal directional drilling, pipeline pigging operations, swagelining, sliplining, duct and conduit work, and dual containment systems.

External Debeading for Pipes up to 1400mm