Inspection methods for welds

 

welding

There are several ways to inspect the weld as follows:
 
1. Visual inspection: inspection by observing the shape, colour, defects, etc. of the weld with the naked eye.
 
2. radiological inspection: the use of X-rays or γ-rays on the weld can detect defects within the weld, such as porosity, inclusions and so on.
 
3. ultrasonic inspection: the use of ultrasonic propagation characteristics, through the ultrasonic scanning of the weld to detect internal defects in the weld, such as inclusions, pores, cracks, etc..
 
4. Magnetic particle inspection: Coat the surface of the weld with magnetic powder and apply a magnetic field to detect cracks, inclusions and other defects on and near the surface of the weld.
 
5. Penetration inspection: Coat the surface of the weld with penetrant, and through the penetration and colour development of the penetrant, detect cracks, inclusions and other defects on the surface of the weld.
 
6. Magnetic Field Inspection: Detect defects in the interior and near surface of the weld by measuring the magnetic field distribution near the weld.
 
7. Acoustic Emission Inspection: Detect the acoustic emission signal of the weld by applying external force to the weld to judge the integrity and defects of the weld.

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