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The penetrant that is trapped in any discontinuities will glow when viewed under a black light. Cracks typically show up as red lines and pits usually look like red e1165-02.

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

The developer brings the penetrating oil out of the discontinuities by a blotting action. The liquid penetrant examination just makes the discontinuities easier to see. A suitable waiting time allows the penetrant to enter the surface discontinuities, and then excess penetrant can be removed.


The visible dye penetrant technique involves the following steps: 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.

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.

The part then needs to be cleaned to remove the penetrant and the developer. Box Dubuque, IA Phone: The visible dye penetrant technique involves the following steps:.


Agreement by the user and the supplier regarding specific techniques is strongly recommended. 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 w165-02 service.

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Another technique involves the use of an ultraviolet light to view the surface asstm. Some equipment manufacturers allow some surface indications, depending on their size and location on a particular part. After application of the developer, the visual inspection is done with a black light. It is a common misconception to label a discontinuity as a crack.

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. The correct term for a discontinuity is an indication, which is not necessarily a crack or a flaw. 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.

It is the responsibility of the user of this standard to establish appropriate e16-02 and health practices and determine the applicability of regulatory limitations prior to use. To avoid this, any indications should be investigated by polishing and re-evaluating the indication.

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.


Also, there e1165-02 no universal acceptance criteria on the maximum allowable size of an indication. The surface then needs to be solvent cleaned to remove any greases or oils. This method substitutes fluorescent penetrating oil for the visible dye penetrant. 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.

Then the surface must be allowed to dry.

Care must be taken not to overly clean and remove the penetrant from the discontinuities. Work Item s – proposed revisions of this standard. The purpose of this article is to describe these basic NDE techniques and discuss some of the advantages and disadvantages of the different methods.

ASTM E165-02.pdf

Advertisement 4 Go axtm Page 1 2 3 4 Edit Story. Active view current version of standard. This is typically done with a special cleaning solvent. A scratch or a pore can easily be misinterpreted as a crack or flaw, and this can lead to unnecessary and costly repairs. Non-destructive examination NDE is used to detect cracks and other flaws in a part without rendering the part unusable by performing destructive testing.

Some of the most popular NDE methods include: