ASTM E165-02 PDF

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The penetrant that is trapped in e165-002 discontinuities will glow when viewed under a black light. The visible dye penetrant technique involves the following steps:.

MET-L-CHEK ROT ( ml). Penetrant testing. Non-destructive testing. Quality System

It is a common misconception to label a discontinuity as a crack. The visible dye penetrant technique involves the following steps: SI units are provided for information only.

Cracks typically show up as red lines and pits usually look like red dots. For this purpose there must be a separate code or specification or a specific agreement to define the type, size, location, and direction of indications considered acceptable, and those considered unacceptable.

Some of the most popular NDE methods include: Penetrating oils typically contain a red dye and are sprayed or brushed onto the area of the material being tested.

They can be effectively used in the examination of nonporous, metallic materials, both ferrous and nonferrous, and of nonmetallic materials such as glazed or fully densified ceramics, certain nonporous plastics, and glass. The correct term for a discontinuity is an indication, which is not necessarily a crack or a flaw.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. They are nondestructive testing methods for detecting discontinuities that are open to the surface such as cracks, seams, laps, cold shuts, laminations, through leaks, or lack of fusion and are applicable to in-process, final, and maintenance examination.


This technique can be used on a variety of ferrous and non-ferrous materials, including steel, stainless steel, aluminum, bronze, tungsten carbide, ceramics and plastics.

This method substitutes fluorescent penetrating oil for the visible dye penetrant. Non-destructive examination NDE is used to detect cracks and other flaws in a part without rendering the part unusable by performing destructive testing.

After application of the developer, the visual inspection is done with a black light.

This might involve sandblasting, wire brushing, etc. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Work Item s – proposed revisions of this standard. With this technique, liquid penetrant is applied to the surface of a material and is drawn into surface discontinuities such as cracks, pits and seams by capillary action. A common recommendation is to use solvent and not potable water when cleaning stainless steel parts, such as turbine rotors, that will be highly stressed when in service.

The part then needs to be cleaned to remove the penetrant and the developer. The surface then needs to be solvent cleaned to remove any greases or oils.

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The reason is that some potable water sources contain chlorine, which can leave a residue on the surface and can lead to cracking in some stainless steels. Pre-clean the surfaces to be inspected. The developer brings the penetrating oil out of the discontinuities by a blotting action.

Then the surface must be allowed to dry. It should be pointed out, however, that after indications have been produced, they must be interpreted or classified and then evaluated. Another technique involves the use of an ultraviolet light to view the surface discontinuities. One of the most atm aspects of liquid penetrant testing is interpreting and evaluating the discontinuities.


A suitable waiting time allows the penetrant to enter the surface discontinuities, and then excess penetrant can be removed. Liquid penetrant testing Liquid penetrant inspection is the most popular method to check for surface cracks because it is simple and no special equipment is required.

Non-destructive examination basics Patrick J. An example of a gear tooth crack that was made more visible using a dye penetrant examination is shown in Figure 1.

ASTM E165-02.pdf

In most cases, the discontinuities are visible to the naked eye without liquid asmt testing. The purpose adtm this article is to describe these basic NDE techniques and discuss some of the advantages and disadvantages of the different methods. Advertisement 4 Go to Page 1 2 3 4 Edit Story.

A scratch or a pore can easily be misinterpreted as a crack or flaw, and this can lead to unnecessary and costly repairs.

Active view current version of standard. This can take minutes satm the developer is applied. Link to Active This link will always route to the current Active version of the standard. Care must be taken not to overly clean and remove the penetrant from the discontinuities. Energy-Tech Magazine Contact us.

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To avoid this, any indications should be investigated by polishing and re-evaluating the indication. As soon as the material is dry, the developer is applied. Box Dubuque, IA Phone: The liquid penetrant examination just makes the discontinuities easier to see.

Agreement by the user and the supplier regarding specific techniques is strongly recommended. This is typically done with a special cleaning solvent.