Liquid Penetrant Testing
- Created By admin@decibel
- Last Updated November 12th, 2021
Liquid Penetrant Testing (PT)
This involves applying a liquid dye to the surface of a material and leaving the dye to “dwell” on the surface for a predetermined period of time. The liquid can be either a color that is easily visible under normal lighting conditions or a yellow/green fluorescent colour that requires special lighting conditions to be seen effectively.
This liquid dye enters into discontinuities that are open to the surface of the material through a phenomenon called “capillary action”. This capillary action takes place throughout the dwell time and the discontinuity retains this dye when the excess dye is cleaned from the surface. A type of developer is then
This involves applying a liquid dye to the surface of a material and leaving the dye to “dwell” on the surface for a predetermined period of time. The liquid can be either a color that is easily visible under normal lighting conditions or a yellow/green fluorescent color that requires special lighting conditions to be seen effectively. This liquid dye enters into discontinuities that are open to the surface of the material through a phenomenon called “capillary action”. This capillary action takes place throughout the dwell time and the discontinuity retains this dye when the excess dye is cleaned from the surface. A type of developer is then
The PT method is suitable on most non absorbent materials
We can provide Liquid Penetrant Inspection courses and examinations suitable for any of the following certification scheme.
- SNT-TC-1A in accordance with your/our company written practice
We can also Provide :
- Preparation training for ASNT Level 3
An example of the syllabus that is used for Liquid Penetrant training courses is shown below for Level 1 and 2. DECIBEL can tailor make the syllabus to satisfy the requirements of an individual’s company specific written practice if requested.
| Level 1 | ||
|---|---|---|
| General Theory | Specific Theory | Practical Examination |
|
Application of the Method and use of Codes, Specifications and Procedures, applicable to the company, including the relevant control checks. | Follow written instructions and process the inspection test pieces, record and report defects from know datum markers, carry out pre test calibration checks, post test procedures. |
| Level 2 | ||
|---|---|---|
| General Theory | Specific Theory | Practical Examination |
(in addition to the Level 1 Syllabus above)
|
Application of the Method to the Specific requirements of the company, in particular making reference to those Codes, Specifications and Procedures Used by the company, including the relevant control checks.
Product technology of the products for the relevant sector, i.e. welds, castings, forgings, this includes, manufacturing processes, defect formation and detection. |
Production of written instruction, determine the best inspection techniques for the individual parts, process the inspection test pieces, record and report defects from know Datum markers, carry out pre test calibration checks, post test procedures. |
About Qualification
Level 1 General Qualification required for separate certification:
10th Grade, SSLC, +2, HSC, Diploma – above or equivalent.
Level 2 Direct – General Qualification required for separate certification:
Level 1 With 6 month’s industrial experience or Science Graduation, Engineering Graduation.
Course Duration:
Will vary depends on the type of certification chosen
