Pengujian Liquid Penetrant Test (Non Destructive Test / NDT)

Summary

This video script outlines the step-by-step process for conducting a material testing procedure using penetrant testing methods. The process includes applying cleaner for surface preparation, followed by the application of a red penetrant for at least 5 minutes to ensure proper penetration into material discontinuities. After cleaning, a developer is applied for further indication of defects, and inspection is conducted under specific lighting conditions (100 lux minimum) to observe and record any relevant indications. The procedure emphasizes careful timing, application methods, and inspection standards to ensure accurate testing results.

Takeaways

• 😀 The necessary equipment for penetration testing includes gloves, cleaner, red penetrant, and developer.
• 😀 Initial cleaning of the test surface is done by spraying cleaner and wiping it off to ensure it's free of contaminants.
• 😀 The red penetrant should be applied after the surface is cleaned, and it needs to stay on the test material for at least 1 minute.
• 😀 The red penetrant needs to penetrate the material for a minimum of 5 minutes to allow proper penetration into any discontinuities.
• 😀 After the penetration step, solvent wipe is performed to clean any remaining penetrant with a dry cloth or towel.
• 😀 Solvent wiping should be done carefully and repeatedly in one direction to avoid disturbing the penetrant in the material's discontinuities.
• 😀 Avoid spraying cleaner directly on the material’s surface during the cleaning phase to prevent contaminating the penetrant.
• 😀 After cleaning, wait at least 1 minute and up to 10 minutes before applying the developer.
• 😀 Developer is applied by spraying it on the test surface from a distance of 15-20 cm, ensuring it's mixed well before use.
• 😀 Inspection should take place 3-30 minutes after applying the developer, under lighting conditions of at least 100 foot candles or 1000 lux.
• 😀 During the inspection, both linear and circular indications should be noted and compared with the standards for acceptance of the test results.

Q & A

What materials are needed for the penetration testing procedure?

The materials needed include gloves, a cleaner (Red Veneteran), developer for application, and solvent wipes for cleaning.

What is the purpose of the initial cleaning step in the procedure?

The initial cleaning step with the cleaner is to remove any debris or contaminants from the surface of the material being tested before applying the penetrant.

How long should the surface material be left to dry after the initial cleaning?

The surface should be left to dry for at least 1 minute to allow any moisture or contaminants in discontinuities to evaporate.

How should the penetrant be applied to the material?

The penetrant (Red Veneteran) should be sprayed or applied to the test specimen and left for a minimum of 5 minutes to allow proper penetration.

What is the purpose of the solvent wipe step?

The solvent wipe step is to clean off any excess penetrant from the test specimen using a clean, dry cloth to avoid contaminating the developer application.

What should be avoided when cleaning the penetrant from the test specimen?

Avoid directly spraying the surface with cleaner during the wipe step, as this could remove penetrant from inside the discontinuities.

How long should the surface be left after cleaning before applying the developer?

The surface should be left to air dry for at least 1 minute and up to a maximum of 10 minutes before applying the developer.

How should the developer be applied?

The developer should be sprayed onto the specimen from a distance of 15-20 cm, ensuring the developer is well-mixed before application.

What are the lighting requirements during the inspection phase?

The inspection should be performed under lighting conditions with an intensity of at least 100 foot candles (1000 lux), which can be measured with a lux meter.

How long should the inspection wait time be after applying the developer?

The inspection should be done after waiting for at least 3 minutes and up to 30 minutes after applying the developer, depending on the indications that appear.