ASTM E 165 PDF
E / EM Standard Practice for Liquid Penetrant Testing for General Industry Standard + Redline PDF Bundle, 38, $, ADD TO CART. (Identical with ASTM Specification E ). 1. Scope. This test method covers procedures for penetrant examination of materials. They are nondestructive. dealing with the liquid penetrant examination of materials and amination Using the Lipophilic Post-Emulsification Pro- This test method is under the jurisdiction of ASTM Committee E07 on Annual Book of ASTM Standards, Vol Nondestructive Testing and is the direct.
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ASTM E pdf - Download as PDF File .pdf), Text File .txt) or read online. Home; ASTM E/EM $; Add to Cart. Printed Edition + PDF;; Immediate download; $; Add to Cart. E Test Method for Liquid Penetrant Examination4. E Practice for 1 This practice is under the jurisdiction of ASTM Committee E-7 on Nonde- structive.
Published April Last previous edition E Robbins Ave. However, visible penetrant 2. Terminology Methods 3. After a suitable dwell time, the excess surface penetrant is removed. A devel- oper is applied to draw the entrapped penetrant out of the 7.
Types of Materials discontinuity and stain the developer. The test surface is then 7. A chaser and supplier. Intermixing of penetrants and accordance with NOTE 3Refer to 9.
Significance and Use soluble in water and cannot be removed with water rinsing 5. They are designed to be selectively removed from the ence, location and, to a limited extent, the nature and magni- surface using a separate emulsifier.
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The emulsifier, properly tude of the detected discontinuities. Each of the various applied and given a proper emulsification time, combines with methods has been designed for specific uses such as critical the excess surface penetrant to form a water-washable mixture, service items, volume of parts, portability or localized areas of which can be rinsed from the surface, leaving the surface free examination.
The method selected will depend accordingly on of fluorescent background. Classification of Penetrations and Methods tions. Because the emulsifier is built- that fluoresce brilliantly when excited by black light see in to the water-washable penetrant, it is extremely important 8. The sensitivity of fluorescent penetrants depends on to exercise proper process control in removal of excess surface their ability to be retained in the various size discontinuities penetrant to ensure against overwashing.
Water-washable pen- during processing, then to bleed out into the developer coating etrants can be washed out of discontinuities if the rinsing step and produce indications that will fluoresce.
Fluorescent indi- is too long or too vigorous. Some penetrants are less resistant cations are many times brighter than their surroundings when to overwashing than others. The penetrant is usually red, so that the of the penetrant has been removed. The remaining traces indications produce a definite contrast with the white back- should be removed with the solvent remover see 8. To ground of the developer. The visible penetrant process does not minimize removal of penetrant from discontinuities, care should be taken to avoid the use of excess solvent.
Flushing the surface with solvent to remove the excess penetrant is prohib- 8 Available from American Public Health Association, Publication Office, ited. The rate of diffusion establishes 8. They are either slow- or fast-acting, materials and the surface of the part to be processed should be depending on their viscosity and chemical composition, and between 40 and F 4 and 52C. Water soluble developers rectly water-washable from the surface of the test part, after a shall not be used with Type 2 penetrants or Type 1, Method A suitable penetrant dwell time.
It is properly applied and controlled. The procedure should be qualified in therefore extremely important to exercise proper control in the accordance with Some penetrants are less resistant to overwashing velopers are supplied as suspensions of developer particles in than others, so caution should be exercised. This thin coating of the penetrant has been removed. The remaining traces serves as the developing medium.
To prevent removal of penetrant from discontinuities, care should NOTE 6—This type of developer is intended for application by spray be taken to avoid the use of excess solvent. Flushing the only. These 7.
Certain types of film developer may be emulsify the post-emulsified penetrant on the surface of the stripped from the part and retained for record purposes see part, rendering it water-washable. The individual characteris- 8. Procedure emulsification time. The concentration, use and maintenance shall be in accordance 8.
Such operations include, but are not limited to, agitation in an open dip tank provides the scrubbing action grinding, welding, straightening, machining, and heat treating. The individual characteristics of the emulsifier and surfaces in the as-welded, as-rolled, as-cast, as-forged, or penetrant, and the geometry and surface roughness of the part ceramics in the densified condition.
Such treat- 7. Performance of final clean and free of excess penetrant. Note that final penetrant examination shall the visibility of the indications. Under certain 8. Aerosol sprays are conveniently portable and mended because of the potential for damage.
This is generally accomplished through the use of a properly and discontinuity being free of any contaminant solid or designed spray booth and exhaust system. All parts or areas of parts to be examined must be clean and dry before 8.
If only a section of a part, such as a cess penetrant to drain from the part care should be taken to weld, including the heat affected zone is to be examined, all prevent pools of penetrant from forming on the part , while contaminants shall be removed from the area being examined allowing for proper penetrant dwell time see Table 2.
The as defined by the contracting parties.
Table 2, however, provides a guide for selection might interfere with the penetrant process. All of these con- of penetrant dwell times for a variety of materials, forms, and taminants can prevent the penetrant from entering discontinui- types of discontinuities.
Unless otherwise specified, the dwell ties see Annex on Cleaning of Parts and Materials. Drying may 8. It can be removed manually with a coarse spray or wiping the part NOTE 9—Residues from cleaning processes such as strong alkalies, pickling solutions and chromates, in particular, may adversely react with surface with a dampened rag, automatic or semi-automatic the penetrant and reduce its sensitivity and performance.
For immersion rinsing, parts are completely immersed in the water bath with 8. Application methods include dipping, brushing, kPa. When hydro-air pressure spray guns are used, the air flooding, or spraying.
Small parts are quite often placed in pressure should not exceed 25 psi kPa. On larger parts, and those with complex geometries, penetrant can be NOTE 11—Overwashing should be avoided.
Excessive washing can applied effectively by brushing or spraying. Both conventional cause penetrant to be washed out of discontinuities.Maximum development time in accordance with 8.
A high concentration of any one A4. The which appear in Terminology E, shall apply to the terms penetrant is usually red, so that resultant indications produce a used in this practice. This dilute reagent should not be used with large samples or where chlorine content may be over 0. Fluorescent indications are many times als, Penetrant brighter than their surroundings when viewed under appropri- ate black light illumination. Application methods include dipping.
The method selected will depend accordingly on the design and service requirements of the parts or materials being tested. Flushing the surface with solvent to remove the excess penetrant is prohib- 8 Available from American Public Health Association, Publication Office, ited. The used in this practice..
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