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1、I I NOTICE OF CANCELLATION I NOT MEASUREMENT SENSITIVE MIL-STD-6866 NOTICE 2 22 November 1996 SUPERSEDING NOTICE 1 4 October 1989 MILITARYSTANDARD INSPECTION,LIQUIDPENETRANT MIL-STD-6866,dated 29 November 1985, is hereby canceled aid replaced by American Society for Testing and Materials Standard AS
2、TM E141795a entitled “Practice for Liquid Penetrant Examination.”CAUTION:The information is valid as of the date of this notice and may be superseded by subsequent revisions toASTM E141795a. (Application for copies of ASTM publications should beaddressed tothe American Society for Testing and Materi
3、als, 100Barr Harbor Drive, West Conshohocken PA 19428-2959.) Custodians: Air Force 11 Army MR Navy AS Preparing activity Air Force -11 (Project No. NDTI-0256) Reviewer activities: Air Force 68,82,99 Army AR, EA, MI Navy OS, SH DLA GS AMSC NIAAREA NDTI DISTRIBUTION STAMENTA: Approved for public relea
4、se; distribution is unlimited. I -2%“-o MIL-STD-6866 NOTICE 1 4 OCTOBER 1989 MILITARY STANDARD INSPECTION, LIQUID PENETRANT MIL-STD-6866, dated 29 November 1985, has been reviewed and determined to be valid for use in acquisition. Custodians: Army - MR Navy - AS Air Force - 11 Preparing activity Air
5、 Force - 11 AMSC NIA AREA NDTI DISTRlBUTION STATEMENT A. Approved for public release; distribution is unlimited. MILITARY STANDARD INSPECTION, LIQUID PENETRANT MIL-STD-6866 29 November 1985 SUPERSEDING MIL-I-6866B 26 February 1964 NO DELIVERABLE DATA REQUIRED BY THIS DOCUMENT AREA NDTI DISTRIBUTION
6、STATEMENT A. Approved for pub1 i c release; distribution unlimited. K . THIS DOCUMENT CONTAINS 4 + PAGES MIL-STD-6866 DEPARTMENT OF DEFENSE Washington, DC 20402 Inspection, Liquid Penetrant 1. This military standard is approved f o r use by a l 1 Departments and Agencies of the Department o f Defens
7、e. 2. Beneficial comments (recommendations, additions , deletions) and any Pertinent data which may be of use i n improving this document should be addressed to: AFWAL/MLSE, Standardization Manager, Wright-Patterson AFB, Ohio 45433-6533, by using the self-addressed Standardization Document Improveme
8、nt Proposal (DD Form 1426) appearing at the end of this document or by letter. Y F ,i ii -,-,- Paragraph 1. 1.1 1.2 1.3 1 . 3 . 1 1.3.2 1.3.3 2 . 2.1 2.1.1 2.2 2.3 3. 3 . 1 3.2 3.3 3.4 3 . 5 3 . 6 3 . 7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 .3.20 3.21 3.22 .3.23 3.24 3.25 MIL-STD
9、-6866 CONTENTS REFERENCED DOCUMENTS- - - - - - - - - - 3 Government documents- - - - - - - - - 3 Specifications and standards- - - - - 3 Other publications- - - - - - - - - - 3 Order o f precedence - - - - - - - - - 4 5 iii -,-,- 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39
10、3.40 3.41 3.42 4. 4 . 1 4.2 4.3 4.4 4.4.1 4.4.2 4.5 4.5.1 4.5.2 4 . 6 4.7 4.7.1 4.7.2 4 . 8 4.9 5. 5 . 1 5.1.1 5 . 1 . 2 5.1.3 5.1.4 5.2 MIL-STD-6866 CONTENTS - Continued. Page Indication- - - - - - - - - - In-process- - - - - - - - - In-service- - - - - - - Inspection- - - - - - - - - - Interpretat
11、ion- - - - - - - - Linear indication - - - - - - NDT facility- - - - - - - - - Penetrant - - - - - - - - - - Penetrant, post emulsifiable- Penetrant, solvent removable- Penetrant, water-washabl e - - Postcleaning- - - - - - - - - Precleaning - - - - - - - - - Prime contractor- - - - - - - Relevant i
12、ndication - - - - - Reprocess - - - - - - - - - - Solvent remover - - - - - - - GENERAL REQUIREMENTS- - - - - - - - - - 8 Responsibility for inspection - - - - 8 Personnel qualification - - - - - - - 8 Qualified materials - - - - - - - - - 8 LOX compatible materials- - - - - - - 8 Equipment and faci
13、lities- - - - - - - 8 Written procedure - - - - - - - - - - 9 Inspection sequence - - - - - - - - - 10 Surface treatment - - - - - - - - - - 10 Surface coatings- - - - - - - - - - - 10 Materials and process 1 imitations - - 10 Specifying- - - - - - - - 8 Materials - - - - - - 8 Processing- - - - - -
14、 - - - 8 V i e w i n g - - - - - - - - - - - - - - - 9 R e c o r d s - - - - - - - m - - - - - - - 11 SPECIFIC REQUIREMENTS - - - - - - - - 12 Surface preparation - - - - - - - - - 12 Solvent cleaning- - - - - - - - - - - 12 Chemical cleaning - - - - - - - - - - 12 Mechanical cleaning - - - - - - -
15、- - 12 Penetrant application and dwell - - - 12 E t c h i n g - - - - - - - - - - - - - - - 12 i v O I I -,-,- a 5.3 5.3.1 5.3.1.1 5.3.1.2 5.3.1.3 5.3.2 5.3.2.1 5.3.2.2 5.3.3 5.3.4 5.3.4.1 5.3.4.2 5.3.4.3 5.4 5.4.1 5.4.2 5 . 5 5.5.1 5.5.2 5.5.3 5.6 5.6.1 5.6.2 5.6.3 5 . 6 . 3 . 1 5.7 5.8 5.8.1 5.8.2
16、 5.8.3 5.8.3.1 5.8.4 5.8.4.1 5.8.4.1.1 5.8.4.1.2 5.8.4.1.3 5.8.4.1.4 5.8.4.2 MIL-STD-6866 CONTENTS - Con ti nued . Page V -,-,- 5.8.4.2.1 5.8.4.2.2 5.8.4.2.3 5.8.4.3 5.8.4.3.1 5.8.4.3.2 5.8.5 5.8.6 5.9 5.9.1 5.9.2 5.9.3 5.9.4 5.9.5 6. 6.1 6.2 MIL-STD-6866 CONTENTS - Continued. Page D 2 . v i -,-,- M
17、IL-STD-6866 1. SCOPE 1.1 Pur ose. This standard establishes the minimum requirements for conducting “ET iquid penetrant inspection of nonporous, metal and nonmetal components. 1.2 Application. The penetrant inspection processes described i n t h i s standard are applicable to in-process, final, and
18、maintenance (in-service) inspections. These processes are applicable for the detection of discon- tinuities that are open or connected t o the surface of the component under inspection. 1.3 Classification. Penetrant inspection processes are classified in accordance with the material classification c
19、ontained in MIL-1-25135. 1.3.1 Penetrant systems. Penetrant systems covered by this standard shall be of the following types, methods and sensitivity levels. Type Type I - Fluorescent dye. Type II - Visible dye. Type III - Visible and fluorescent dye (dual mode). Method 1 . 3 . 2 Method A - Water-wa
20、shable. Method B - Post emulsifiable, lipophilic. Method C - Solvent removable. Method D - Post emulsifiable, hydrophilic. Sensi t i v i ty Sensitivity Level 1 - Low. Sensitivity Level 2 - Medium. Sensitivity Level 3 - High. Sensitivity Level 4 - Ultrahigh. I - P “ . Developers. Developers shall be
21、o f the following forms: Form a - Dry powder. Form b - Water soluble. Form c - Water suspendable. Form d - Nonaqueous. Form e - Specific application. 1 MIL-STD-6866 1.3.3 Solvent removers. Solvent removers shall be of the following classes: L Class (1) - Halogenated. Class (2) - Non-halogenated. Cla
22、ss (3) - Specific application. 2 -,-,- MIL-STD-6866 2. REFERENCED DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards, of the issue listed in that issue of the Department o f Defense Index of Specifications an
23、d Standards (DODISS) specified i n the solicitation form a part of this standard to the extent specified herein. SPECIFICATIONS c MILITARY (c MIL-1-25135 MIL-P-47158 Inspection Materials, Penetrant Penetrant Inspection, Soundness Requirements f o r Material s., Parts, and We1 dments STANDARDS MILITA
24、RY MIL-STD-410 Nondestructive Testing Personnel Qualification and MIL-STD-792 Identification Marking Requirements for Special MIL-STD-45662 Calibration Systems Requirements Certification Purpose Components (Copies of specifications, standards, drawings, and publications required by manufacturers i n
25、 connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this standard to the extent specified herein. Unless otherwise specified, the issues of the docu
26、ments which are DOD adopted shall be those 1 isted in the solicitation. The issues of documents which have not been adopted shall be those i n e f f e c t on the date of the cited DODISS. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D95 Witer in Petroleum Products and Bituminous Materials
27、by Distillation, Test for ASTM D2512 Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold Technique) , Test for (Application for copies should be addressed to the American Society f o r Testing and Materiah, 1916 Race Street, Philadelphia PA 19103. ) .3 MIL-STD-6866 (Industry
28、association standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies. ) 2.3 Order of precedence. In the event o f a conflict between the require- ments o f this standard and the references cited herein, the requiremen
29、ts of this standard shall take precedence. 4 -,-,- MIL-STD-6866 MIL-STD-b8bb N-D W 7777733 0065757 2 R 3. DEFINITIONS 3.1 Back round. The surface of the component against which an indication i s viewe + 3.2 Black light. Electromagnetic radiation in the near-ultraviolet range. Wavelength i s from 320
30、 t o 400 nm. 3.3 Black light filter. A filter that transmits near-ultraviolet radiation while absorbing other wavelengths. 3.4 Bleedout. The action of entrapped liquid penetrant in surfacing from discontinuities to form indications. 3.5 Component. The part(s) or element(s) of a system described, ass
31、embled, or processed to the extent specified by the drawing. 3 . 6 Contaminant. Any foreign substance present on the test surface or in the inspection materials which w i l l adversely affect the performance of 1 iquid penetrant materials. 3.7 Contracting agency. A prime contractor, subcontractor or
32、 Government agency procuring liquid penetrant inspection services. 3.8 Dark adaptation. The adjustment of the eye that enhances visual perception in a darkened area. i 3.9 Defect. - A discontinuity or group of discontinuities that exceed the specified acceptance criteria for a component. 3.10 Develo
33、per. A material applied to the test surface to accelerate bleedout and enhance the contrast of indications. 3.11 Developer, dry. A fine, free-flowing powder used as supplied. 3.12 Developer, nonaqueous. A developer that is either dissolved or susDended i n a volatile solvent (other than water) as su
34、pplied, and rapidly dries to an adsorptive (or absorptive) coating. . . 3.13 Developer, wet (aqueous) soluble. A developer, normally supplied as a dry concentrate, that i s completely soluble in water, and dries to an absorptive (or adsorptive) coating. 1 ied 3.14 Developer, wet (aqueous) suspendibl
35、e. A developer, normally supp as a dry powder concentrate, that i s suspended i n water and dries to an adsorptive (or absorptive) coating. 3.15 Drain time. The portion of dwell time during which excess penetrant or emulsifier drains from the component. 5 -,-,- MIL-STD-6866 3.16 Drying oven, The ove
36、n used to increase the evaporation rate of rinse water or ao aqueous deve1 Oper from component. 3.17 Dwell time. The total time that a penetrant, emulsifier or remover, or a developer spends in contact with the component. For aqueous and nonaqueous developers, the dwell time starts after the develop
37、er is dry on the component. 3.18 Emulsifier. A liquid that renders the excess penetrant on the component surface water-washable. 3.19 Emulsifier, hydrophilic. An emulsifier that is .water-soluble. 3.20 Emulsifier, lipophilic. An emulsifier that is oil-soluble and not water-soluble. 3.21 Etchin . The
38、 uniform removal of surface material by chemical or electroc l+ emlcal methods (also known as chemical milling). 3.22 Evaluation. The review following interpretation o f indications that determines the acceptability of the component, 3.23 Fluorescence. The emission of visible radiation by a material
39、 as a result of, and only during, the absorption of black light. 3.24 Government procurement agency. The Government agency for which the system is built or service provided. 3.25 Hydro-air nozzle. Water nozzle that mixes compressed air with water. 3.26 Indication. The visible result o f penetrant bl
40、eedout. 3-.27 In-process. That which occurs during manufacturing before a component i s i n f i n a l form. 3.28 In-service. Refers to components that are in use or storage for their intended function. 3.29 Ins ection. Visual examination under appropriate illumination of a component “- a ter complet
41、ion of the liquid penetrant processing steps. 3.30 Interpretation. The determination of the cause(s) of indications and the classification of such cause(s), 3.31 Linear indication. Penetrant indications with at least a three to one length t o width ratio. 3.32 NDT facility. The organization responsi
42、ble for providing nondestruc- tive inspection service. 6 e e e a MIL-STD-b however, other criteria may be utilized. Engineering drawings or other applicable documents shall indicate the acceptance criteria for the entire component; zoning may be used. Inspection on a sampling basis shall not be allo
43、wed unless specifically permitted by the contract. 4.3 Personnel qualification. Personnel making accept/reject decisions described i n t h i s standard shall be qualified to at least Level II i n l i q u i d penetrant inspection in accordance with MIL-STD-410. Personnel performing the processing as
44、described in this standard shall be qualified to at least Level I in liquid penetrant inspection in accordance with MIL-STD-410. If a Level I performs the processing, it shall be under the direct supervision or observation of a Level II or higher individual. 4.4 Materials. 4.4.1 Qualified materials.
45、 Only materials listed or approved f o r l i s t i n g on QPL-25135 (reference MIL-1-25135) shall be uti1 ized for penetrant inspec- tion. Materials not conforming to the requirements of MIL-1-25135 may be used only when a waiver i s obtained from the contracting agency. 4.4.2 LOX compatible materia
46、ls. Penetrant materials tested i n accordance with ASTM D2512 and passing a t 70 foot-pounds (955) or higher, shall be used on LOX (Liquid Oxygen) wetted surfaces which cannot be thoroughly post- cleaned. Use o f these materials shall be i n accordance with the material supplier instructions and sha
47、ll require approval of the contracting agency when such materials do not meet the requirements of MIL-1-25135. 4.5 Equipment and facilities. 4.5.1 Processing. The penetrant inspection processing equipment shall be constructed and arranged to permit a uniform and controlled operation. 8 a a e -,-,- M
48、IL-STD-6866 The equipment shall meet all applicable national and local safety requirements as well as the requirements specified herein. 4.5.2 Viewing. Viewing areas shall be kept clean at all times. For visible dye inspection, Type II, the lighting system shall provide at least 100 foot-candles (1000 lx/m2)of white light at the surface of the component being inspected. For stationary fluorescent dye inspection, Type I, the amb