ASTM E Liquid Penetrant Equivalent 23rd May , AM ASTM E , Standard Practice for Liquid Penetrant Examination for General Industry. ASTM E Standard Practice for Liquid Penetrant Examination; ASTM E Standard Practice for Visible Penetrant Testing Using Solvent Removable. Aug 9, For those of you who do liquid penetrant testing, you’ll want to know that there’s a new Edition of the ASTM E/EM standard.
|Published (Last):||27 April 2006|
|PDF File Size:||8.95 Mb|
|ePub File Size:||10.33 Mb|
|Price:||Free* [*Free Regsitration Required]|
A number in parentheses indicates the year of last reapproval. Penetrant testing is a nondestructive testing method for detecting discontinuities that are open to the surface such as cracks, seams, laps, e1655-09 shuts, shrinkage, laminations, through leaks, or lack of fusion and is applicable to astk It can be effectively used in the examination of nonporous, metallic materials, ferrous and nonferrous metals, and of nonmetallic materials such as nonporous glazed or fully densi?
Agreement by the customer requesting penetrant inspection is strongly recommended.
All areas of this practice may be open to agreement between the cognizant engineering organization and the supplier, or speci? It should be pointed out, however, that after indications have been sstm, they must be interpreted or classi? For this purpose there must be a separate code, standard, or a speci?
The values ast in each system may not be exact equivalents; 1 This practice is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E Current edition approved June 15, Originally approved in Last previous edition approved in as E – Combining values from the two systems may aastm in nonconformance with the standard. It qstm 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.
Summary of Practice 4. The liquid penetrant is applied evenly over the surface being examined and allowed to enter open discontinuities. After a suitable dwell time, the excess surface penetrant is removed.
A developer is applied to draw the entrapped penetrant out of the discontinuity and stain the developer.
The test surface is then examined e165-90 determine the presence or absence of indications. NOTE 1—The developer may be omitted by agreement between e65-09 contracting parties. NOTE 2—Fluorescent penetrant w165-09 shall not follow a visible penetrant examination unless the procedure has been quali? Each of the various penetrant methods has been designed for speci? The method selected will depend accordingly on the design and service requirements of the parts or materials being tested.
Fluorescent indications are many times brighter than their surroundings when viewed under appropriate black light illumination. The penetrant is usually red, so that resultant indications produce a de? Visible penetrant indications must be viewed under adequate white light. A family of liquid penetrant examination materials consists of the applicable penetrant and emulsi?
Intermixing of penetrants and emulsi? NOTE 3—Refer to 9.
NOTE 4—While approved penetrant materials will not adversely affect common metallic materials, some plastics or rubbers may be swollen or stained by certain penetrants. BoxArlingate Ln. AIAWilson Blvd. They are formulated to be selectively removed from the surface using a separate emulsi?
Properly applied and given a proper emulsi? It is therefore extremely important to exercise proper control in the removal of excess surface penetrant to d165-09 against overwashing. Some penetrants are less resistant to overwashing than others, so caution should be exercised. The remaining traces should be removed with the solvent remover see 8. To prevent 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 prohibited as the penetrant indications could easily be washed away. The individual characteristics of the asmt Care should be taken not to contaminate the developer with? Water soluble developers shall not be used with Type 2 penetrants or Type 1, Method A penetrants. NOTE 5—Aqueous developers may cause stripping of indications if not properly applied and controlled.
The procedure should be quali? Nonaqueous, wet developers are sprayed on to form a thin coating on the surface of the part when dried.
This thin coating serves as the developing medium. NOTE 6—This aastm of developer is intended for application by spray only. These developers will form a transparent or translucent coating on the surface of the part. Such operations include, but are not limited to, grinding, welding, straightening, machining, and heat treating. Satisfactory inspection results can usually be obtained on surfaces in the as-welded, as-rolled, as-cast, as-forged, or ceramics in the densi?
Such treatments include, but are not limited to, vapor blasting, deburring, sanding, buffing, sandblasting, or lapping. NOTE 8—Surface preparation of structural or electronic ceramics for penetrant testing by grinding, sand blasting and etching ast, not recommended because of the potential for damage. Electrostatic spray application can eliminate excess liquid build-up of penetrant on the part, minimize overspray, and minimize the amount of penetrant entering hollow-cored passages which might serve as penetrant reservoirs, causing severe bleedout problems during examination.
Aerosol sprays are conveniently portable and suitable for local application.
NOTE 10—With spray applications, it is important that there be proper ventilation. This is generally accomplished through the ast, of a properly designed spray booth and exhaust system.
All parts or areas of parts to be examined must be clean and dry before the penetrant is applied. If only a section of a part, such as a weld, including the heat affected zone is to be examined, all contaminants shall be removed from the area being examined as de? All of these contaminants can prevent the penetrant from entering discontinuities see Annex on Cleaning of Parts and Materials. Drying may be accomplished by warming the parts in drying ovens, with infrared lamps, forced hot air, or exposure to ambient temperature.
NOTE 9—Residues from cleaning processes such as strong alkalies, pickling solutions and chromates, in particular, may adversely react with the penetrant and reduce its sensitivity and performance. The length of time the penetrant must remain on the part to allow proper penetration should be as recommended by the penetrant manufacturer.
Table 2, however, provides a guide for selection of penetrant dwell times for a variety of materials, forms, and types of discontinuities. It can be removed manually with a coarse spray or wiping the aastm surface with a dampened rag, automatic or semi-automatic water-spray equipment, or by water immersion.
For immersion rinsing, parts are completely immersed in the asrm bath with air or mechanical agitation. When hydro-air pressure spray guns are used, the air pressure should not exceed 25 psi [ kPa]. NOTE 11—Overwashing should be avoided. Excessive washing can cause penetrant to be washed out of discontinuities. Application methods include dipping, brushing,? Small parts are quite often placed in suitable baskets and dipped into a tank of penetrant. On larger f165-09, and those with complex geometries, penetrant can be applied effectively by brushing or spraying.
Both conventional and electrostatic spray guns are effective means of applying liquid ast, to the part surfaces. Maximum penetrant dwell time in accordance with 8. Development time begins as soon as wet developer coating has dried on surface ee165-09 parts recommended minimum.
Maximum development time in accordance with 8. After application of the emulsi? The length of time that the emulsi? Contact time shall be kept to the minimum time to obtain an acceptable background asfm shall not exceed three minutes. The amount of time the part is in the bath should be the minimum required to remove the emulsi? Any necessary touch-up rinse after an immersion e156-09 shall meet the requirements of 8.
The water spray pressure shall not exceed 40 psi [ kPa] when manual e165-90 guns are used. This prerinse allows for the removal of excess surface penetrant from the parts prior to emulsi?
It is not necessary to prerinse a part if a spray application of emulsi? The water spray pressure shall not exceed 40 psi [ kPa] when manual or hydro air spray guns are used. When hydro-air pressure spray guns are used, the air pressure shall not exceed 25 psi [ kPa].
Water free of contaminants that could clog spray nozzles or leave a residue on the part s is recommended. The minimum time to obtain an acceptable background shall be used, but the dwell time shall not be more than two minutes unless approved by the contracting parties. The concentration of the emulsi? The water spray pressure should be less than asfm psi [ kpa].
Contact with the emulsi? The total rinse time shall not exceed two minutes regardless of the number of rinse methods used.
The spray rinse time shall be less than two minutes, unless otherwise speci?
Gentle wiping must be used to avoid removing penetrant from any discontinuity. On smooth surfaces, an alternate method of removal can be done by wiping with a clean, dry cloth. Flushing the surface with solvent following the application of the penetrant and prior to developing is prohibited.
Drying time will vary with the type of drying used and the size, nature, s165-09, and number of parts being processed. Room temperature drying can be aided by the use of fans. Drying time shall only be that necessary to adequately dry the part.
Components shall be removed from the oven after drying. The developer form, the part size, ast,