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Helium Leak Test
Principle
| This test is performed by introducing helium gas into the internal space of the test material and over-pressurizing. The helium gas will flow through any welding seam flaws, cracks or pin holes. Any leaking helium gas will be sucked into a sniper which has been attached to a helium mass spectrometer. The gas will be ionized in the ion chamber by an electronic beam generated by a filament. A helium ion collector gathers only helium ions and will send an amplified signal to the indicator. The leakage can be measured by the signal strength. |
Application
- LNG Carrier
- LNG Terminal
- High-pressurizing pipe line
- Overall industries
Equipment
- Cabin (Vacuum pump, Compressor, Flow-meter, Multi-display, Recorder, Mercury mano meter, Water manometer, Stopwatch, Radio. Etc.)
- Dried air supply
- Helium manifold
- Temperature sensor
- Transportation robot including multi sniffers
- Helium mass spectrometer
- Reference leak
- Global box
| Transportation robot |
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| Potable sniffer |
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Procedure
Please click here to see the Procedure
Evaluation
- A re-examination will have to be performed should the devices malfunction or the correct test procedure are not followed.
The re-examination shall be accepted should the result be under the stipulated leakage value.
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