UHP Waterjetting

UHP waterjetting uses extremely powerful water pressure that can cause severe injury when handled manually. Operators working with lances are positioned close to the cleaning zone, which means they are exposed to potential injection injuries, hose failures, rebound spray, and flying coating debris.

This makes safety planning critical on every UHP project. PPE, training, hose protection, exclusion zones, and strict operating procedures are all required, but even with these controls in place, manual waterjetting keeps people close to one of the most dangerous parts of the job.

Holding and controlling a UHP lance for long periods is physically demanding. Operators must manage tool reaction force, hose drag, body position, surface access, and constant movement while trying to maintain the correct stand-off distance from the steel.

As fatigue builds, consistency often drops. Travel speed, overlap, and cleaning distance can vary from operator to operator, which may lead to uneven results, missed areas, slower production, and extra inspection or rework.

Ship hulls, storage tanks, offshore structures, and other large steel assets are rarely easy to access. Manual UHP work often depends on scaffolding, manlifts, staging, rope access, or other temporary access systems before the actual cleaning can begin.

These access methods can add significant time and cost to the project. They also introduce extra planning, equipment movement, safety checks, and downtime, especially when crews need to reposition equipment repeatedly across a large surface.

UHP waterjetting depends heavily on consistent movement, correct stand-off distance, and controlled overlap between passes. When done manually, it is difficult to keep those variables the same across a full shift or across multiple operators.

This can create visible differences in surface cleanliness from one area to another. On coating removal projects, inconsistent cleaning may lead to underprepared zones, extra touch-up work, slower inspections, or uncertainty before the next coating system is applied.

UHP waterjetting eliminates abrasive media from the process, but it does not eliminate waste. The water used during cleaning mixes with coating debris, rust, salts, and other contaminants from the surface, creating wastewater that must be contained, collected, filtered, or disposed of correctly.

On sensitive sites, this can become a major planning factor. Without the right recovery setup, water and debris can spread across the work area, create slip hazards, complicate cleanup, and increase the environmental burden of the project.