The challenge
Heat and dust had warped and corroded the internal casing plates of the electrostatic precipitator (ESP), and several welds supporting the high-voltage frames had failed.
Repairs meant hot work inside a confined space: plasma cutting and heavy welding in an enclosed chamber, with fume extraction and continuous gas monitoring.
Scope of works
- Confined space entry and hot work permits, gas testing and standby rescue
- Plasma cutting and removal of warped, corroded internal plates
- Fitting and structural welding of new plates and reinforcement stiffeners
- NDT inspection and dimensional checks of all welds
Outcome
The ESP structure was restored to full rigidity and gas-tightness, ready for safe recommissioning. See the related ESP repair and maintenance project.
Photo record
