A glass coat can only protect the supporting steel material if it is absolutely leak-proof. Therefore, the glass coat has to be checked regularly and carefully for defects. In addition to continuous measurements using the P probe attached to valves and baffles, two testing units are available for intermittent glass testing.
GLASPARKER HIGH-VOLTAGE SPARK TESTER
The GlaSparker® has been specifically developed for universal high-voltage testing of glassed components and complete apparatus. The measuring principle of high-voltage spark testing is based on the high electrical resistance of the protective glass layer. A testing electrode – e.g., a brush electrode – is guided along the glass surface. A pore is indicated by a sparkover at the defective point, and the related signal output. Test voltages can be adjusted between 2.5 kV and 20 kV.
As an essential performance feature of the testing unit, even all-glassed components (e.g. Cryo-Lock® turbines or competitors’ agitators) can be tested safely using the possibility of capacitive grounding. After all, metallic (direct) grounding is not possible in these cases.
With the impulse voltage method, the potential operator hazard is significantly below the limit values permitted under IEC no. 479-1 and 479-2. As the material stress depends on how long the test voltage is applied, sixteen hours of impulse voltage correspond to one second of DC voltage, due to the very short, unipolar voltage pulses. The material stress is very low, virtually qualifying this method as a “non-destructive test”.
The battery-operated GlaSparker® offers spark testing practically in all places. In goods receipt, on the building site, or when installed on the platform of the production facility - the GlaSparker® offers its benefits for all glass lined components and apparatus at all times and in any place.
The next Generation: Corrosion Detector Portable