Method and application
VT examines accessible surfaces, while MT examines surface and near-surface indications in ferromagnetic materials. PT assesses surface-breaking discontinuities on clean, non-porous surfaces; UT assesses discontinuities within materials. The method is selected according to the material and inspection purpose.
Scope of application
- Visual testing (VT)
- Magnetic particle testing (MT)
- Liquid penetrant testing (PT)
- Ultrasonic weld and material testing (UT)
- Vacuum box leak testing on suitable surfaces and welds
Each method is sensitive to different types of discontinuity. Methods are combined where necessary; a single inspection does not rule out every possible defect.
Reporting
Reports document scope, method, inspection conditions and findings, together with assessment results against the relevant acceptance criteria.