Glossary
Alternative cleaning
Manual lancing
Also known as manual rodding, hand-lance cleaning.
Manual lancing is operator-performed cleaning of industrial equipment using handheld rods, lances, water jets or hammers. In modern industrial practice it is the cleaning method of last resort — performed when automated cleaning systems have failed to prevent build-up that now requires direct human intervention.
Where it persists
- Cement-plant kiln-inlet snowman removal during planned outages
- Recovery-boiler post-water-wash inspection cleaning
- Hopper and silo clearance after bridging-induced shutdowns
- Cleaning of partially-blocked equipment too restricted for water-jet access
HSE concerns
- Confined-space entry
- Elevated working positions
- Fall-of-material risk above operators
- Heat exposure
- Repetitive-strain injury from sustained manual work
The economic and HSE case against manual lancing is the underlying motivation for installing automated cleaning systems including sonic horns — every avoided manual-lancing campaign removes an HSE-exposed operator-hour from the maintenance budget.
Related terms
Related terms
- Water lanceA water lance is a handheld or fixed water-jet cleaning device used during boiler outages or, in fixed designs, for slag-melt zones during operation.
- Hydroblasting (offline cleaning)Hydroblasting uses high-pressure water (typically 700–2,000 bar) to remove hardened deposits from boiler tubes and process equipment during planned outages.
- Whip hammerWhip hammering is the manual technique of striking the outside of a hopper or silo with a sledge to dislodge material bridges. A legacy practice with documented safety and structural concerns.