Hot-Dip Galvanizing Kettle Inspection Services (In-Service Condition)
Fizpribor provides residual wall thickness measurement services for hot-dip galvanizing kettles without interrupting production.
The measurement data enables precise calculation of corrosion rates and reliable assessment of the kettle's remaining safe service life. Based on the residual thickness analysis, we offer expert recommendations on adjusting burner (heater) operating parameters or repositioning burners to extend the kettle's operational life.
Measurement Principle
A high-temperature transducer is immersed directly into the molten zinc and pressed against the inner wall of the kettle. The liquid zinc itself serves as the acoustic couplant, eliminating the need for additional contact agents.
Wall thickness measurements are performed using an ultrasonic flaw detector operating in the echo-echo measurement mode, which provides high accuracy even on corroded or uneven surfaces.
Equipment
Kettle inspections are carried out using the HTP-600 system, which includes:
- Ultrasonic flaw detector
- High-temperature ultrasonic transducer
- Manual manipulator for immersing and securing the transducer inside the kettle
HTP-600 Specifications
| Measurement range | 20–80 mm |
| Thickness measurement accuracy | ≤ 0.3 mm |
| Transducer immersion depth | Up to 3 m |
| Operating temperature range | Up to 600°C |
Metrological Support
The UD9812 ultrasonic flaw detector is registered in the State Register of Measuring Instruments.
The measurement procedure has undergone official expert review and is registered in the State Register of Certified Measurement Procedures.
All inspections are performed by certified ultrasonic testing specialists.
Example of Kettle Wall Thickness Profile Measurement
We offer several manipulator configurations to accommodate various hot-dip galvanizing kettle geometries.
Additional measurements can be taken on the kettle ends and in corners with a bend radius of at least 150 mm.