Non-destructive Examinationhttps://www.lookupdesign.net also known as non-destructive testinghttps://www.lookupdesign.net includes methods to test or evaluate the structural condition or defects of a container without damaging it. Worldwide inspection services companies make use of several NDE methods to analyze welding defects or other structural or system damage caused to tankshttps://www.lookupdesign.net containershttps://www.lookupdesign.net or water towers.
Herehttps://www.lookupdesign.net we have listed some of the widely used methods to conduct Non-destructive Examination.
- Acoustic Emission Testing (AE)
Acoustic Emission Testing is a passive testing technique. In this methodhttps://www.lookupdesign.net the API inspection companies look for short bursts of ultrasound that are emitted by cracks under the loads. The sensors are disseminated over the surface of the containers to check for acoustic emission. In highly stressed areashttps://www.lookupdesign.net one can detect AE from plasticization. The AE testing is used while conducting proof tests of a pressure vessel or structural health monitoring for bridges.
- Electromagnetic Testing (ET)
As the name suggestshttps://www.lookupdesign.net in Electromagnetic testinghttps://www.lookupdesign.net an electric current is passed through a conductor. The ET consists of three types; they arehttps://www.lookupdesign.net eddy current testinghttps://www.lookupdesign.net remote field testinghttps://www.lookupdesign.net and alternating current field measurement.
- Ground Penetrating Radar (GPR)
Ground Penetration Radar is a geophysical method of NDE. In this testing techniquehttps://www.lookupdesign.net radar pulses are sent through the surface of the container or the structure. When the radar hits or encounters an object of different electromagnetic characteristicshttps://www.lookupdesign.net the waves reflect or refracted.
- Laser Testing Methods (LM)
Laser testing consists of three types of techniqueshttps://www.lookupdesign.net which are laser shearographyhttps://www.lookupdesign.net laser profilometryhttps://www.lookupdesign.net and holographic testing.
In the laser shearography techniquehttps://www.lookupdesign.net the laser light is used to create before and after images of a stressed surface. Both models are compared to detect any deviation.
In laser profilometryhttps://www.lookupdesign.net a high speed rotating laser light source and a miniature optics are used to analyze erosion and crackshttps://www.lookupdesign.net pittinghttps://www.lookupdesign.net or corrosion. The faults are detected by tracking the changes in the surface of the container via a 3D image produced from the above.
In holographic testinghttps://www.lookupdesign.net laser light is used to detect changes in the surface of the container that has been stressed due to pressurehttps://www.lookupdesign.net heathttps://www.lookupdesign.net or vibration. The finding is compared with samples of the undamaged surface.
- Leak Testing (LT)
Leak testing is divided into four methods. They are pressure change testinghttps://www.lookupdesign.net bubble leak testinghttps://www.lookupdesign.net mass spectrometer testinghttps://www.lookupdesign.net and halogen diode testing.
The pressure change testing technique is only used to detect faults in closed systems. The testing is done either through pressure or vacuum to monitor the testing tank. If there is a leak in the tank or systemhttps://www.lookupdesign.net the loss of pressure over a set time will indicate it.
In bubble leak testinghttps://www.lookupdesign.net a soap solution or liquid tank is used to detect air or gas leakage from the pipes. If there is any air leakage happeninghttps://www.lookupdesign.net bubbles will form around it.
In mass spectrometer testinghttps://www.lookupdesign.net the leak is detected using helium gas and a sniffer.
Like the pressure testing methodhttps://www.lookupdesign.net halogen diode also used pressure to detect leaks. Howeverhttps://www.lookupdesign.net in this particular methodhttps://www.lookupdesign.net a mixture of air and halogen-based tracer gashttps://www.lookupdesign.net and halogen diode detection unit or sniffer is used to find out the leakage.