DLA MIL-G-17594 B-1967 GROMMET PLASTIC UNICELLULAR HIGH DENSITY《高密度单细胞塑胶索环》.pdf

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1、MIL-G-l7594B(SIIPS) 16 October 1967 SUPERSEDING MIL - G- 17 5 94A (SHIPS) 8 February 1963 (See 6.3) MI LI TARY SPEC I FI CAT ION GROMbIET, PLASTIC, UNICELLULAR, HIGH DENSITY 1. SCOPE 1.1 This specification covers one type of buoyant, high density, foamed plastic 2. APPLICABLE DOCUMENTS 2.1 The follo

2、wing documents of the issue in effect on date of invitation for bids grommet of the shape and dimensions specified on Drawing S8225(5)-1170434, or request for proposal, form a part of the specification to the extent specified herein. SPEC1 F ICATIONS FEDERAL C-C-91 - Candles, Illuminating. MIL-P-116

3、 Preservation, Method of MIL-C-17415 - Cloth, Coateci, and Webbing, Inflatable Boat and Miscellaneous MIL I T ARY Use. STANDARDS FEDERAL FED-STD-595 - Colors. FED-STD-601 - Rubber: Sampling and Testing. MIL-STD-293 - Visual Inspection Guide for Cellular Rubber Items. PIIL-STD-414 - Sampling Procedur

4、es and Tables for Inspection by Variables for MIL I TARY Percent Defective. DRAWING NAVAL SHIP EKGINEERING CLNTER S8225(5)-1170434 - Inflatable Boat Equipment-Rescue Line-Details and Arrangements. (Copies of specifications, standards, drawings, and publications required by suppliers in connection wi

5、th specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of in

6、vitation for bids or request for proposal shall apply. UN IFORd CLASS I FI CATION COMIIITTEE Uniform Freight Classification Rules. (Application for copies should be addressed to the Uniform Classification Committee, 202 Union Station, 516 West Jackson Boulevard, Chicago, Illinois 60606.) Licensed by

7、 Information Handling ServicesMIL-G-L757LlB 53 7777906 0302032 2 W MIL-G-l7594B(SHIPS) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D-471 - Change in Properties of Elastomeric Vulcanizates Resulting from Immersion in Liquids. (Application for copies should be addressed to the American Society f

8、or Testing and (Technical Society and Technical Association Specifications and Standards are generally Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) available for reference from libraries. and using Federal agencies.) They are also distributed among technical groups 3. REQUIREMENTS

9、 3.1 Material * 3.1.1 Plastic. The fiastic material shall be a poly (vinyl chloride) homo or copolymer containing phosphate plasticizers and compounded and pigmented to meet all the applicable requirements of this specification. used in formulating the plastic meets this requirement shall be provide

10、d as specified in 4.3.1.1. Evidence that the resin and plasticizer 3.1.2 Form. 3.2 Finished grommet. 3.2.1 Physical properties. The plastic material shall be in the form of a flexible foam, composed of minute, evenly distributed closed cells of uniform size. The finished grommet shall conform to the

11、 properties of table I. Table I - Physical properties. 2 Property Density,.pounds per cubic foot Compression resistance at 25 percent deflection, pounds Buoyancy net, pounds Weight, grams Strength in tension, initial pounds Strength in tension, after 1 week at Volume loss on heat aging after 1 week

12、Blocking after 1 week at 165F. 3il resistance Fire resistance - flame duration, seconds Fire resistance - length of char, inches 16SF., pounds at 16SF., percent Requirement Minimum Maximum 25 40 0.1 160 200 150 - No No - - 55 80 190 - - 5 Bloc king Swelling 30 3 Test Reference 4.4.1 4.4.2 4.4.3 4.4.

13、4 4.4.5 4.4.6 4.4.7 4.4.8 4.4.9 4.4.10 4.4.10 3.2.2 Color. The color shall be orange, between textile sea rescue color and color 97 of FE-595. The grommet shall be uniformly pigmented throughout. 3.2.3 Shape and dimensions. 3.2.4 Construction. 3.2.5 Odor. The grommet shall be free of objectionable o

14、dor. 3.3 Workmanshi from imper#ch may affect their serviceability or appearance. The plastic grommet shall conform to the shape and dimensions specified in Drawing S8225(5)-1170434. shall have a natural skin. The ring forming the grommet shall be molded in one piece and Finishing operations are rest

15、ricted to trimming the mold flash. The grommets shall be of uniform workmanship and shall be free 2 Licensed by Information Handling ServicesMIL- G- 17 594B (SHIPS) 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or Except as otherwise sp

16、ecified, the supplier may utilize his purchase order, the supplier is responsible for the performance of all inspection require- ments as specified herein. own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections se

17、t forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to the prescribed requirements. 4.2 Sampling. 4.2.1 Lot. For purposes of sampling, examination and tests a lot shall consist of all grommetsofthe same size and composition, not excee

18、ding 1,000, offered for delivery at one time. shall be selected from each lot in accordance with the sampling plan of table II for the examination specified in 4.3.1. 4.2.2 Sampling for visual and dimensional examination. A random sample of grommets Table II - Sampling for visual and dimensional exa

19、mination AQL (approx.) = 1.5 percent defective. Number of grommets in an inspection lot 15 and under 16 to 40 41 to 110 111 to 300 301 to 500 501 to 800 801 to 1000 Number of grommets in sample 10 15 25 35 50 75 Acceptance (defect ives ) number Rejection number (defectives) 1 1 2 6 3 4 4.2.3 Samplin

20、g for tests. A random sample of grommets shall be selected in accordance wth table III from each lot that passes the examination of 4.3.1. Quality conformance tests shall be conducted as specified in 4.3.2. Table III - Sampling for tests. Number of grommets Number of grommets 4.4.8 in inspection lot

21、 to be tested (except (Blocking). blocking 4.4.8) up to 8 9 to 15 16 to 25 26 to 50 51 to 90 91 to 150 151 to 500 501 to 1000 None 2 (both must pass) 3 4 5 7 10 15 (Both sample units must pass) “ L 2 L 2 L 2 6 2 4.3 Quality conformance inspection. 4.3.1 Visual and dimensional examination. Each of th

22、e sample grommets selected in accordance with table II shall be visually and dimensionally examined to verify compliance with the requirements for color (3.2.2), shape and dimensions (3.2.3), construction (3.2.4) odor (3.2.5), and workmanship (3.3). Each of the sample grommets shall also be examined

23、 for the defects listed in MIL-STD-293, as applicable. Any grommet in the sample containing one or more visual or dimensional defects shall not be offered for delivery, and if the number of defective grommets in the sample exceeds the acceptance number of table II, the lot represented by the sample

24、shall be rejected. Licensed by Information Handling ServicesMIL-G- 17 594B (SHIPS) 4.3.1.1 Certification of composition. Contractor shall furnish certification that the resin used in formulating the plastic material (3.1) is a homo or copolymer or poly (vinyl chloride) and that phosphate plasticizer

25、s are .used. 4.3.2 Quality conformance tests. Quality conformance tests shall be conducted on samples from each lot offered for delivery in accordance with table III. All the tests specified in 4.4 shall be performed. shall be used as shown in MIL-STD-414. The data obtained from each test, except 4.

26、4.8, 4.3.3 Action in case of nonconformance. If the number of defectives in the samples examined under 4.3.1 or in the quality conformance tests (4.3.2) exceeds the acceptable number, the lot which it represents shall be rejected. The contractor may resubmit the rejected lot only after removal of al

27、l defective grommets. Resubmitted lots shall be sampled and tested as specified in 4.2 and 4.3.2. 4.4 Test procedures. 4.4.1 Density. The density of the grommet shall be determined by dividing the weight of the grommet by its volume and shall be expressed in pounds per cubic foot. volume shall be de

28、termined by measuring the volume of water displaced by the grommet. The 4.4.2 Compression resistance at 25 percent deflection. 4.4.2.1 Specimen. The specimen shall be a radially cut section of the grommet of 1 inch inside arc length. 4.4.2.2 Procedure. Method 12151 of FED-STD-601 shall be used. The

29、force in pounds required to compress the specimen 25 percent of the cross-sectional diameter shall be reported. approximateljdkdks beneath the surface of the water by attaching a suitable sinker, After 30 minutes immersion, the weight of the grommet plus the sinker under water shall be determined. T

30、he weight of the sinker under water shall also be determined. The difference between these two weight determinations is the net buoyancy of the grommet. capable of weig ing to the nearest 0.1 gram. 4.4.3 Buo anc The plastic grommet shall be suspended in a horizontal position 4.4.4 Weiiht. The weight

31、 of the plastic grommet shall be determined on a balance 4.4.5 Strength in tension, initial. Two pieces of rope 1/4 inch thick shall be attached to the grommet 180“ aoart. each with two turns around the erommet. A 200 oound weight shall be ttached to the fre end of one rope. The grommet and weight s

32、hallrthen be gradually lifted by the other rope until the weight is hanging free. The assembly of grommet and weight shall be held in this position for 1 minute, whereupon the grommet is detached. Breakage, tears or cracks, of the grommet shall constitute failure to meet the initial strength require

33、ment. 4.4.6 Strength in tension after 1 week at 165F. The grommet shall be heat aged in a circulatine air oven at 165“ + 2F (73.9 + l.l“C1 for 1 week, The grommet shall then be allowed-to stand for 5 hours at 70“ + ZvF (21.i“ + l.lC), and again be tested as specified in 4.4.5, except that a 150 poun

34、d weight shall be used. Failure shall be as defined in 4.4.5. 4.4.7 Volume loss on heat aging. The volume loss of a plastic grommet before and after the heat aging test shall be determined by measuring the volume of water displaced by the grommet. Tne grommet shall be laid flat on an 8 by 8 inch or

35、larger giece of coated cloth, conforming to type 5 of MIL-C-17415, in an oven maintained at 165 + 2 F (23.9 + 1.lC) for one week. At the end of this period the coated cloth with the grommet lying thereon shall be removed from the oven and permitted to stand for 5 hours at 70 + 2F (21.1 + 1.i“C). The

36、 grommet shall then be carefully lifted from the cloth. cloth shall be noted (see 4.4.8). The volume of the grommet shall then be determined as described above. in the test of 4.4.7 shall constitute failure of the grommet to meet the requirement for blocking. The temperature of the water shall be th

37、e same for the two measurements. Any adhesion between the grommet and the 4.4.8 Blocking after one week at 165F. Adhesion of the grommet to the coated cloth 4 Licensed by Information Handling ServicesMIL-G-17574B 53 m 77777Ob 0102035 fi 9 MI L-G - 17 594B (SHIPS) 4.4.9 Oil resistance. 4.4.9.1 S ecim

38、ens Two identical specimens of convenient size each with an arc 4.4.9.2 Procedure. One specimen shall be immersed in ASTM No. 3 oil of ASTM D-471 length of not hl inch shall be cut from a grommet. for 70 hours. The specimen shall then be removed, dipped in alcohol and blotted with filter paper. visi

39、ble swelling and deterioration. 4.4.10 Fire resistance. 4.4.10.1 Specimens. The test specimen shall be 1/4 inch in thickness, 1/2 inch in width and approximately 6 inches in length. Specimens shall be cut from the grommet. 4.4.10.2 Procedure. The specimens shall be clamped at one end in a position s

40、uch that the long dimension forms a 45-degree angle with the horizontal and with the 1/2 inch width in a vertical position. A candle flame shall be applied to the lower or free end of the specimen for 15 seconds. The candle shall then be removed and the time that the specimen continues to burn after

41、 removal of candle shall be recorded as flame duration time. The candle shall conform to class B of C-C-91, and the test shall be performed in a location free from drafts. The treated and untreated specimen shall be compared for apparent softeness, The length of char shall also be recorded. 4.5 Exam

42、ination of preparation for delivery. The packaging, packing and marking shall be examined in accordance with Table IV for compliance with the requirements of *Section 5. The sample mit shall be one shipping container, fully packed, taken at random just prior to the closing operation. shall be examin

43、ed for closure defects. Sampling shall be in accordance with MIL-P-116. One shipping container fully prepared for shipping Table IV - Examination of preparation for delivery. Examine Packaging Packing Weight of boxes Count per shipping container Mar king Defect Not providing adequate protection duri

44、ng shipment and storage for early use; not level specified; no in accordance with method III of MIL-P-116. Not assuring acceptance by common carrier at Iowest applicable rate; not affording adequate protection during direct shipment from supply source to using activity not conforming to Uniform Frei

45、ght Class- ification Rules or other applicable carrier regulations; not conforming to,specified level; container not as specified; case liners missing (when applicable) nor not as specified; not closed and sealed as specified; corners, edge seams and manufacturers joints not sealed as specified (whe

46、i applicable); boxes not closed, strapped or banded as specified. specification. Exceeding weight limitation of applicable box Number of pieces per shipping container not as Shipment marking not provided on packages and/or specified. I* shipping containers, incomplete, illegible, incorrect; not in a

47、ccordance with MIL-STO-129. 5. PREPARATION FOR DELIVERY 5.1 Domestic shipment and early material use. 5.1.1 Packaging. Packaging shall be sufficient to afford adequate protection against deterioration and physical damage during shipment from the supply source to the using activity and until early us

48、e.and may conform to the suppliers commercial practice when such meets these requirements. 5 I i.- I . , . - . . L, Licensed by Information Handling ServicesMIL-G-17574B 53 m 9779906 O10203b T MIL - G - 17 5 9 4 B (SHI PS ) 5.1.2 Packing. Packing shall be accomplished in a manner which will insure a

49、cceptance by common carrier at the lowest rate and will afford protection against physical or mechanical damage during direct shipment from the supply source to the using activity for early use. The shipping containers or method of packing shall conform to the Uniform Freight Classification Rules and Regulations or other carrier regulations as applicable to the mode of transportation and may conform to the suppliers commercial practice when such meets these requirements. The number of pieces per container shall be specified, if required (6.2) . 5.1.3 Mar