scope:

This standard establishes the minimum requirements for conducting liquid penetrant inspection of nonporous, metal and nonmetal components.

The penetrant inspection processes described in this standard are applicable to in-process, final, and maintenance (in-service) inspections. These processes are applicable for the detection of discontinuities that are open or connected to the surface of the component under inspection.

Penetrant inspection processes are classified in accordance with the material classification contained in MIL-I-25135.

Penetrant systems covered by this standard shall be of the following types, methods and sensitivity levels.

Type Type I - Fluorescent dye. Type II - Visible dye. Type III - Visible and fluorescent dye (dual mode). Method Method A - Water-washable. Method B - Post emulsifiable, lipophilic. Method C - Solvent removable. Method D - Post emulsifiable, hydrophilic. Sensitivity Sensitivity Level 1 - Low. Sensitivity Level 2 - Medium. Sensitivity Level 3 - High. Sensitivity Level 4 - Ultrahigh.

Developers shall be of the following forms:

Form a - Dry powder. Form b - Water soluble. Form c - Water suspendable. Form d - Nonaqueous. Form e - Specific application.

Solvent removers shall be of the following classes:

Class (1) - Halogenated. Class (2) - Non-halogenated. Class (3) - Specific application.

intended Use:

The penetrant inspection process is intended for the detection of discontinuities open to the surface, such as lack of fusion, corrosion, cracks, laps, cold shuts and porosity.