ASNT Level 3 Liquid Penetrant Testing Course
ASNT Level 3 Liquid Penetrant Testing Course Fees 450 $ | ASNT Level 3 Liquid Penetrant Testing Course Exam Fees To be informed | ASNT Level 3 Liquid Penetrant Testing Course Duration 20 Days | ASNT Level 3 Liquid Penetrant Testing Course Location Muscat
Synopsis of Liquid Penetrant Testing
Liquid penetrant testing can be defined as a physical and chemical nondestructive testing procedure designed to detect and expose surface connected discontinuities in nonporous engineering materials. The method relies on the physical interaction between an appropriately formulated chemical liquid and the surface of a part.
This interaction causes the liquid to enter surface cavities and later to emerge, visually indicating the location and approximate size and shape of the surface opening. The objective of liquid penetrant testing is to provide visual evidence of cracks, porosity, laps, seams and other surface discontinuities rapidly and
economically with a high degree of reliability.
ASNT Level 3 Liquid Penetrant Testing Course covers this objective is facilitated by formulating the liquid to include dyes that are highly visible with either white or near ultraviolet radiation. With proper technique, liquid penetrant testing will detect a wide variety of discontinuities ranging in size from readily visible to microscopic.
Reasons for Selecting Liquid Penetrant Testing
Some of the reasons for choosing liquid penetrant testing are as follows.
- Liquid penetrant testing can quickly examine all the accessible surfaces of objects. Complex shapes can be immersed or sprayed with liquid penetrant to provide complete surface coverage.
- Liquid penetrant testing can detect very small surface discontinuities. It is one of the most sensitive nondestructive testing methods for detecting surface discontinuities.
- Liquid penetrant testing can be used on a wide variety of materials: ferrous and nonferrous metals and alloys; fired ceramics and cermets; powdered metal products; glass; and some types
of organic materials. Restrictions on materials imposed by the nature of the liquid penetrant process are covered in the discussion of limitations, below. - Liquid penetrant testing can be accomplished with relatively inexpensive, nonsophisticated equipment. If the area to be tested is small, the test can be accomplished with portable equipment.
- Liquid penetrant testing magnifies the apparent size of discontinuities, making the indications more visible. In addition, the discontinuity location, orientation and approximate size and shape are indicated on the part, making interpretation and evaluation possible.
Reasons for Using Liquid Penetrant Testing
Liquid penetrant testing is often the first nondestructive testing method management considers for testing of industrial products (1) because it often requires minimal capital expenditure for implementation and (2) because it can accommodate a variety of test object materials, shapes and sizes, test locations
and environmental conditions. However, the outcome of a liquid penetrant test is largely dependent on the human operator.
ASNT Level 3 Liquid Penetrant Testing Course covers the Liquid penetrant testing is a labor intensive method. Therefore, labor constitutes a high recurring test cost. In short, the quality of the test and the cost of testing warrant considerable management attention to the selection, training, management and audit of liquid penetrant testing personnel.
Choosing Which Liquid Penetrant Process When the decision to use liquid penetrant testing has been made, which system should be selected? There are varieties of penetrants, liquid penetrant removal systems and developers; there are also many ways to combine these different liquid penetrant system elements. The manager must consider the specific application. For the great majority of parts, the conventional water washable or postemulsifiable penetrants are suitable and adequate.
However, many factors must be considered when selecting the optimum liquid penetrant system. For example, the preferred system should (1) indicate significant discontinuities open to part surfaces; (2) not adversely affect the material or the part in later service, (3) be affordable and (4) not take so much time that it unreasonably disrupts production schedules.
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