1、 “. = . “. MIL-E-22 1 18B (OS) 9 July 1974 SUPERSEDING 9 October 1964 , . MIL-E-221 18A (WEP) MILITARY SPECIFICATION ENAMEL, ELECTRICAL - INSULATING This specification is approved for use by all departments and agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers one type an
2、d grade of synthetic insulating enamel for use on electrical equipment, and for general purpose use. This specification meets Air Pollution Regulations (Rule 66). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issues in effect on date of invitation for bids or request for proposals form
3、a part of this specification to the extent specified herein. SPECIFICATIONS Federal P-D-680 QQ-S-698 TT-B-846 TT-P- 143 TT-T-548 Dry Cleaning Solvent Steel, Sheet and Strip, Low-Carbon n-Butyl Alcohol Paint, Varnish, Lacquer, and Related Materials; Packaging, Packing and Marking of Toluene THIS DOCU
4、MENT CONTAlNS.f.PAGm I FSC 80101 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-22 1 18B (OS) Military MIL-F-1 71 11 Fluid, Power Transmission STANDARDS Federal FED-STD- 14 1 Paint, Varnish, Lacquer and Related Materials; Methods of Inspection
5、, Sampling and Testing (Copies of specifications and standards required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms a part of this spec
6、ification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. American Society for Testing and Materials ASTM Dl 15 Method of Testing Varnishes Used for Electrical Insulation. (Application for copies shou
7、ld be addressed to the American Society for Testing and Materials, 19 16 Race Street, Philadelphia, Pa. 19 103.) 3. REQUIREMENTS 3.1 Color. The color of the enamel shall be characteristic of red iron oxide pigment. 3.2 Composition. 3.2.1 Pigment. The pigment portion of the enamel shall conform to th
8、e requirements of table I. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-221 18B (OS) 3.2.2 Vehicle. The vehicle shall be a phthalic alkyd resin together with the necessary addition of volatile solvents and driers. 3.2.3 Volatile content. T
9、he volatile content shall conform to the following requirements by volume when tested as in 4.4.3. a. Solvents having an olefinic or cyclo-oiefinic type of unsaturation: 5 Percent maximum. b. A combination of aromatic compounds with eight or more carbon atoms to the molecule except ethyl benzene: 8
10、percent maximum c. A combination of ethyl benzene, ketones having branched hydrocarbon structures, or toluene: 20 percent maximum d. Total of a + b + c: 20 percent maximum 3.3 Quantitative requirements. The enamel shall conform to the quantitative requirements specified in table I. Table I QUANTITAT
11、IVE REQUIREMENTS Characteristics Total solids, percent by weight of enamel Pigment, percent by weight of enamel Vehicle solids, percent by weight of enamel Phthalic anhydride, percent by weight of Iron oxide (Fe203), percent by weight of pigment Calcium oxide, percent by weight of pigment Coarse par
12、ticles and skins, percent by weight Extenders, percent by weight of pigment Water, percent by weight of enamel Viscosity, Krebs Stormer Weight per gallon, pounds Drying time, air drying Tack-free, hours Dry through, hours nonvolatile vehicle of pigment Baking; dry through 230“ F or equivalent heat t
13、reatment, hours Minimum 58 25 32 30 28 - - - 61 9 - - - - Maximum -., 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-221 18B (OS) 3.4 Qualitative requirements 3.4.1 Condition in container. When tested as in 4.4.4 the enamel shall be free fro
14、m grit, seeds, skins, lumps, abnormal thickening, livering, or excessive pigment flotation and shall show no more pigment settling or caking than can be readily reincorporated to a smooth homogeneous state. 3.4.2 Odor. When tested as in 4.4.5 the odor of the wet paint and of the film at any interval
15、 of drying shall not be obnoxious or objectionable. 3.4.3 Dilution stability. When tested as in 4.4.6 there shall be no evidence of precipitation, curdling or separation. Slight pigment settling shall be permitted. 3.4.4 Brushing properties. When tested as in 4.4.7 the enamel shall brush satisfactor
16、ily in all respects and shall dry to a smooth, uniform film, free from seeds, runs, sags or streaks. 3.4.5 Spraying properties. When tested as in 4.4.8 the enamel shall spray satisfactorily in all respects, and shall show no running, sagging or streaking. The dried film shall show no dusting, mottli
17、ng, or color separation, and shall present a smooth finish free from seeds. 3.4.6 Dipping properties. When tested as in 4.4.9 the enamel shall show satisfactory dipping properties and shall present a smooth appearance, free from sagging, running, or excessive silking. 3.4.7 Baking properties. When t
18、ested as in 4.4.1 1 the enamel shall be full hard, smooth, and free from all defects. It shall show no more than a slight discoloration. The film shall be considered to be full hard when it is very difficult to remove with a knife blade. 3.4.8 Knife test. When tested as in 4.4.12 the enamel shall ad
19、here tightly and not flake, crack, or powder from the metal. The cut shall show beveled edges. 3.4.9 Drying cleaning solvent resistance. When tested as in 4.4.13 the enamel shall show no softening, loss of adhesion, wrinkling, or blistering. A slight change in color shall be disregarded. Provided by
20、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-2211BB BO W 7779906 0303Ll33 3 m 3.4.10 Hydraulic fluid resistance. When tested as in 4.4.14 the enamel shall show no blistering, softening, or other film defects. A slight change in color shall be disregard
21、ed. 3.4.1 1 Salt spray resistance. When tested as in 4.4.15 the enamel shall show no rust creepage or undercutting beyond one-eighth inch from the score mark. At all other points there shall be no rusting or blistering. There shall be no softening of the film. 3.4.12 Dielectric strength. When tested
22、 as in 4.4.16 the dielectric strength of the enamel shall not be less than 1200 volts/mil dry and 300 volts/mil wet. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all
23、 inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the r
24、ight to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Sampling, inspection and testing. Unless otherwise specified, sampling, inspection and testing shall be in accorda
25、nce with method 103 1 of FED-STD-141. 4.3 Classification of tests. Testing under this specification shall be for the purpose of acceptance of individual lots. 4.4 Test methods. 4.4.1 Test conditions. The routine and referee testing conditions shall be in accordance with section 7, FED-STD-141 except
26、 as otherwise specified herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-E-221 18B (OS) . Tests Total solids Pigment solids Pigment analysis Fe2 O, -iron oxide Calcium oxide Coarse particles and skins Extender pigment Vehicle solids Phth
27、alic anhydride Water Viscosity Weight per gallon Volatile content Drying time Condition in container Odor Dilution stability Brushing properties Spraying properties Dipping properties Panel preparation Baking properties Knife test Dry-cleaning solvent resistance Hydraulic fluid resistance Salt spray
28、 resistance Dielectric strength 6 Table II INDEX Applicable method in FED-STD- 14 1 404 1 4022 402 1 7141 7141 4092 527 1 4052 702 1 4082 428 1 41 84 7355,7356 406 1 301 1 440 1 4203 432 1 433 1 434 1 406 1 63 04 601 1 601 1 606 1 - - Test Method Paragraph of this specifica- tion giving fur- ther re
29、ferences - - - - - - - - - - - - 4.4.3 4.4.4 4.4.5 4.4.6 4.4.7 4.4.8 4.4.9 4.4.1 o 4.4.11 4.4.12 4.4.13 4.4.14 4.4. I5 4.4.16 - Paragraph of this specifica- tion giving requirements Table I Table I Table I Table I Table I Table I Table I Table I Table I Table I Table I Table I 3.2.3 Table I 3.4.1 3.
30、4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7 3.4.8 3.4.9 3.4.1 O 3.4.1 1 3.4.12 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-22LLBB 80 7777706 03031.135 7 = MIL-E-221 18B (OS) 4.4.3 Volatile content. Determine solvents as in methods 7355 and 7356 of
31、FED-STD-14 1 for compliance with 3.2.3. 4.4.4 Condition in container. Determine package condition in accordance with method 301 1 of FED-STD-141 and observe for compliance with 3.4.1. 4.4.5 Odor. Test the enamel in accordance with method 4401 of FED-STD-141 for compliance with 3.4.2. 4.4.6 Dilution
32、stability. Reduce one volume of packaged enamel with one volume of thinner conforming to table III. Test according to method 4203 of FED-STD-141 for compliance with 3.4.3. 4.4.7 Brushing properties. Apply the enamel to a 4- by 12-inch steel panel, conforming to QQ-S-698 using a 1-1/2-inch brush, in
33、accordance with method 4321 of FED-STD-141 for compliance with 3.4.4. 4.4.8 Spraying properties. Reduce the enamel for spraying with thinner conforming to table III in a ratio as recommended by the manufacturer. Test according to method 433 1 of FED-STD-141 for compliance with 3.4.5. 4.4.9 Dipping p
34、roperties. Reduce the enamel for dipping with thinner conforming to table III in a ratio as recommended by the manufacturer. Test according to method 4341 of FED-STD-141 for compliance with 3.4.6. Table III TIIINNER Ingredient Percent by weight VM packed level A, B, or C as specified (see 6.2) in ac
35、cordance with TT-P-143. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-22 1 1 B (OS) 6. NOTES 6.1 Intended use. The enamel covered by this specification is intended for use primarily as an insulating protective coating on electrical equipmen
36、t. It is also useful as a heat and oil resistant protective coating and sealant. It is not intended for applications requiring high film flexibility. The enamel is not recommended for outdoor exposure. 6.2 Ordering data. Procurement documents should specify the following: (a) Title, number and date
37、of this specification (b) Size of container (c) Level of packaging and level of packing. 6.3 The enamel should be purchased by volume, the unit being one U.S. liquid gallon of 23 1 cubic inches at 68F (20C). 6.4 Asterisks are not used in this revision to identify changes with respect to the previous issue, due to the extensiveness of the changes. Custodian: Preparing activity: Navy - OS Navy - OS (Project No. 801 O-N117) * U. S. GOVERNMENT PRINTING OFFICE: 1974-603- 108/560 rr 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
