Why this matters
Before work starts, use this Concrete Pump Hose & Whip Hazards talk to cover hose movement, pressure and struck-by injuries. Point out the equipment, work zone and controls the crew will rely on today. Concrete delivery lines can store significant pressure, especially when a blockage forms. Hose movement, a failed coupling or a plug releasing can strike people with little warning, so the placement zone and blocked-line procedure must be understood before pumping starts.
A scenario to discuss
During Concrete Pump Hose & Whip Hazards, flow stops and the hose begins to pulse as pressure builds behind a blockage. What must happen with the pump, pressure and exclusion zone before anyone handles a coupling or tries to clear the line?
Before work starts
- Inspect hose sections, clamps/couplings, gaskets, supports and end hose before pumping.
- Establish an exclusion zone around the end hose and any location where a line could move or whip.
- Confirm the communication/stop signal between the placement crew and pump operator.
- Support and route the line to reduce sharp bends, uncontrolled movement and stress at couplings.
- Review the blocked-line/depressurization procedure before the first load is pumped.
Common failure points
- Standing over or straddling a pressurized line/coupling.
- Loosening or striking a coupling while pressure may remain behind a blockage.
- Continuing to pump when the hose starts pulsing, moving or behaving differently.
Safe work sequence / controls
- Inspect hose, clamps and connections before pumping.
- Keep workers out of the end-hose whip zone during startup, blockage clearing and pressure changes.
- Use controlled communication between pump operator and placement crew.
- Never attempt to open a pressurized line or coupling.
- If conditions change, stop long enough to make sure the control for hose movement, pressure and struck-by injuries still works for the job in front of you.
Stop and reset the plan if...
- Flow stops or pressure/movement changes in a way that suggests a blockage or restriction.
- A hose, coupling, clamp, gasket or support leaks, shifts or appears damaged.
- Communication with the pump operator or the exclusion zone cannot be maintained.
Questions worth asking the crew
- Where can the delivery hose move or whip if pressure changes, a blockage clears or the pump surges, and who must stay outside that zone?
- Are hose sections, clamps/couplings, gaskets, supports and end hose suitable and visibly sound before pumping begins?
- Who controls communication with the pump operator, and what signal stops pumping immediately if placement becomes unsafe?
- What is the depressurization/blocked-line procedure before anyone loosens a coupling, strikes a line or tries to clear a plug?
- Has anyone seen a concrete line plug, pulse or whip? What did the hose/pump do before the situation became dangerous?
Make it real on the job
Trace the delivery line with the crew, point out couplings and hose-whip zones, then have the pump/placement team repeat the stop and blocked-line procedure.
Close the talk
Before the crew starts, everyone should be able to explain the hazard, point to the control being used today, and name the condition that would make the work stop.
Related authoritative reference
29 CFR 1926.702(e) - Concrete Pumping Systems · Open reference ↗
This is a practical discussion guide, not a substitute for required training, a competent person, permits, manufacturer instructions, employer procedures, or applicable federal/state/local requirements. Adapt it to the actual task and conditions.
