Liquid Penetrant is an inspection method used to locate surface-breaking defects in all non-porous materials.  Liquid Penetrant Inspection is used to detect casting and forging defects, cracks, and leaks in new products, and fatigue cracks on in-service components.

Magnetic particle is an inspection method for detecting defects in ferrous materials.  This inspection method is applied to raw materials (billets or slabs), material in the early stages of manufacturing (forgings, castings), or machined parts before they are put into service.  It is also used for inspecting structural parts (e.g., landing gear) that have been in-service for some time to find fatigue cracks.

A pressure test is the common way in which leaks can be found in pressure vessels.  Pressure test helps maintain safety standards and durability of a vessel over time.  Newly manufactured pieces are initially qualified using pressure test and (once in-service) re-qualified at regular intervals using proof pressure test.

Premier Precision Group's - Special Processing is capable of performing pressure testing per customers’ blueprint requirements up to pressures of 300 PSIG using compressed gases.  Lower pressures are achieved using filtered air in water-filled tanks.

Impregnation is the process of totally permeating or infusing castings or material voids with a substance that fills the voids, hardens and subsequently prevents leakage when the casting are subjected to internal or external pressures.  When imperfections are found in pressure testing, small leaks may be impregnated, and re-tested, when permitted by customer blueprints and/or specifications.