1. Qualified Personnel
2. Chemical composition Inspection
3. Mechanical properties Inspection
4. Nondestructive Testing: UT, MT, PT
4.1 Ultrasonic testing (UT): Using ultrasonic pulses to detect fine defects in castings, such as porosity and inclusions.
4.2 Magnetic particle testing (MT): By applying a magnetic field on the surface of the casting and observing the reaction of magnetic particles in the defect area, surface and near-surface cracks in the casting can be detected.
4.3 Penetrant testing (PT): Applying a penetrant agent on the surface of the weld, allowing it to penetrate into defects, then wiping it off and observing if there are any residual traces of penetration to determine the presence of defects.