Any submerged asset in a treatment works. In service.
Above the water, everything is measured against a datum. Below it, acoustic imaging resolves what cameras cannot see. Every result is recorded against the asset.
The complete tank. One engineering assessment.
Scraper mechanism and structure, bridge geometry, drive and idler wheels, motor and gearbox, main bearing, scum and weir boards, centre and feed drums, pipework and floor profile. Eight-point level survey against the agreed datum.
Full scope ↓
Condition beneath stored storm water.
Submerged structure, cleaning mechanisms and mountings, walls, benching and floor profile, sediment depth and distribution, obstructions. Without emptying the tank.
No confined-space entry.
Pump casings and risers, pipework and supports, benching and structure, debris and ragging. Imaged from above with the pumps in service.
Through turbulence.
Diffuser grids, droplegs and pipework, penstocks and gates, walls, floors and joints beneath aerated or flowing water. Lane kept in process.
Scope on each asset subject to safe access and operating conditions
Measured, not eyeballed.
Every item is referenced to a datum so the next inspection measures change.
Asset reference, coordinates, orientation, diameter, depth, wall and weir heights, water level, floor slope.
Eight-point perimeter level survey, differential settlement, observable structural condition.
Level, longitudinal and transverse inclination, alignment, deflection, handrails, connections, supports.
Condition, measured wear, contact surface, alignment, running condition.
Condition, wear, alignment, contact condition, mechanical deterioration.
Leakage, lubrication evidence, noise, vibration, mountings, casing, operation.
Wear, lubrication, movement, noise, vibration, temperature where safe, fixings, mounting.
Scraper mechanism and structure, scum and weir boards, centre and feed drums, duck's feet and pipework, acoustic floor profile.
D · Drive wheel: measured wear and contact surface
B · Eight-point level survey against the datum
Every component identified, imaged, measured and graded.
Each component is given an identity, imaged, measured where geometry permits and graded good, monitor or act. An engineer interprets every capture.
PRAFIRA acoustic captures · illustrative examples