PIP/Materials/TBT-PIP-008

Ductile Iron (DI) Pipe Safety

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Ductile Iron (DI) Pipe Safety

Toolbox Talk Record

Ref: TBT-PIP-008  |  Issue: 1  |  Date: March 2026
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What?

  • Ductile iron pipe is widely used for water mains, sewers, and industrial applications due to its strength.
  • DI pipe is heavy — a standard 6-metre length of 300mm diameter pipe weighs approximately 350 kilograms.
  • Pipe handling requires mechanical lifting or multiple operatives with team lifting techniques.
  • Rubber ring push-fit joints require precise alignment and clean surfaces for a watertight seal.
  • Cutting DI pipe on site generates metallic dust and sparks, requiring eye and hearing protection.
  • The internal cement lining is fragile and must be protected from impact during handling and installation.
  • Pipe sections can roll unexpectedly on slopes or uneven ground, creating crush risks for operatives.
  • Trench conditions must allow sufficient working space for safe jointing and alignment of DI pipe.
  • Restraint joints or thrust blocks are required at changes of direction to resist hydraulic thrust forces.
  • Manual Handling Operations Regulations 1992 and LOLER 1998 apply to DI pipe handling and lifting.

Why?

Crush injuriesHeavy DI pipe sections roll, slide, and fall during handling, causing fatal crush injuries to workers below.
Manual handlingThe weight of DI pipe makes manual handling injuries extremely common without mechanical aids and team lifting.
Joint integrityDamaged linings, dirty joints, and misaligned pipes cause leaks that require costly excavation and repair.
Do Don't
  • Use mechanical lifting equipment for all DI pipe sections over 50 kilograms.
  • Chock and wedge pipe sections to prevent rolling on slopes or uneven ground.
  • Clean spigot and socket surfaces thoroughly before assembling push-fit joints.
  • Protect the internal cement lining from impact during handling and lowering.
  • Wear safety boots, gloves, and eye protection when cutting DI pipe on site.
  • Ensure adequate trench width for safe jointing and working around the pipe.
  • Install thrust blocks or restrained joints at all bends and tee connections.
  • Inspect lifting chains, slings, and shackles before each pipe lift.
  • Use pipe cradles or slings designed for round loads when lifting DI pipe.
  • Brief the team on the pipe laying sequence and handling methods each day.
  • DON'T attempt to manually lift DI pipe sections that exceed safe team limits.
  • DON'T leave pipe sections unchocked on sloping ground or near trench edges.
  • DON'T assemble joints with dirt, debris, or damage on the sealing surfaces.
  • DON'T drop or drag pipe sections as this damages the internal cement lining.
  • DON'T cut DI pipe without eye protection; sparks and fragments are projected.
  • DON'T stand in the trench directly below a pipe being lowered into position.
  • DON'T omit thrust blocks at bends; hydraulic forces will blow the joint apart.
  • DON'T use wire rope slings that could damage the external pipe coating.
  • DON'T force misaligned pipes together; adjust the bedding and alignment first.
  • DON'T stack DI pipes more than two layers high without secure separation.

See also: Pipeline Safety Awareness | Pipe Cutting On Site
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