DLA MIL-DTL-16685 E-2009 PACKING MATERIAL AND PACKING PREFORMED (STUFFING TUBE FOR ELECTRIC CABLES).pdf

1、AMSC N/A FSC 5330 MIL-DTL-16685E 7 JANUARY 2009 SUPERSEDING MIL-P-l6685D 30 April 1970 DETAIL SPECIFICATION PACKING, MATERIAL AND PACKING PREFORMED (STUFFING TUBE FOR ELECTRIC CABLES) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Sc

2、ope. This specification covers rounded packing on spools or reels and preformed packing for electric cable seals in stuffing tubes. 1.2 Classification. Packings are of the following classes, compositions, and types, as specified (see table I, figures 1 and 2 and 6.2): Class 1 - Rounded packing on sp

3、ools or reels. Composition A - Retainer packing. Composition B - Sealing packing. Class 2 - Preformed. (Made up from composition A and B packing (see 3.2). Type I - For deck and bulkhead stuffing tubes (see Table III). Type IA - For deck and bulkhead stuffing tubes (see Table III). Type II - For equ

4、ipment stuffing tubes (see Table III). 1.3 Part or Identifying Number (PIN). The PINs to be used for packing acquired to this specification are created as follows: Class 1 M 16685 - 1 A 125 Sizes in decimals (see 3.1.2) Composition (see 1.2) Class 1 (see 1.2) Specification Number Prefix for Military

5、 Specification INCH-POUNDComments, suggestions, or questions on this document should be addressed to Defense Supply Center Philadelphia (DSCP), ATTN: DSCP-NASA, 700 Robbins Avenue, Philadelphia, PA 19111-5096 or e-mail to dscpg&ispecommentsdla.mil . Since contact information can change, you may want

6、 to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 2Class 2 M 16685 - 2 I B Size (see Table 1) Type (see 1.2) Class 2 (see

7、 1.2) Specification Number Prefix for Military Specification 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional

8、 information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Non-Government publicatio

9、ns. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ASQ Z1.4 Sampling Procedures and tables for Inspection by Attributes.

10、 (Copies of this document are available from www.asq.org or the American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) 2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references

11、cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Class 1, rounded. 3.1.1 Material. 3.1.1.1 Composition A. The fiber shall be composed of polytetra

12、fluoroethylene (expanded PTFE) graphite, and a high temperature lubricant. This product shall be asbestos free. 3.1.1.2 Composition B. Packing shall be composed of an admixture of cork particles, graphite, lubricant and a plastic binder enclosed in a woven cotton lattice jacket. 3.1.2 Sizes. Packing

13、 shall be furnished in rounded cross section in sizes 1/8 (.125), 3/16 (.188), 1/4 (.250), 5/16 (.313), 3/8 (.375), 7/16 (.438), and1/2 (.500) as specified (see 6.2). 3.2 Class 2, preformed. 3.2.1 Material. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS

14、-,-,-MIL-DTL-16685E 33.2.1.1 Piece1. Piece 1 shall be made of packing conforming to class 1, composition A, as shown on figures 1, 2, and 3. 3.2.1.2 Piece 2. Piece 2 shall be made of packing conforming to class 1, composition B, which may be made in one continuous piece in the form of a tight helix,

15、 or may be cut into individual rings (see figures 1, 2, and 4). If made of individual rings, the cuts shall be displaced approximately 90 degrees from the cuts in the adjoining rings. The cut in each top and bottom retainer rings shall be similarly displaced from the cut in the adjoining sealing com

16、ponent. 3.2.2 Coating. After molding, packing shall receive a thin coat of a suitable quick drying resin preparation. The coating shall be of such a nature that it will in no way affect the sealing properties of the class 1, composition B packing, when tested as specified in 4.4. 3.2.3 Sizes. Packin

17、g shall be of the sizes shown in table I and as specified (see 6.2). Table I - Sizes. Dimensions Size 1/ d Inch outside diameter Inches inside diameter Inches h-I (type I) Inches h-IA (type IA) Inches h-II (type II) Inches A B C D E F G J K L M N P R S T V W X Y Z 3/16 (.188) 3/16 (.188) 3/16 (.188)

18、 3/16 (.188) 3/16 (.188) 3/16 (.188) 1/4 (.250) 1/4 (.250) 1/4 (.250) 1/4 (.250) 1/4 (.250) 1/4 (.250) 1/4 (.250) 5/16 (.313) 3/8 (.375) 3/8 (.375) 3/8 (.375) 3/8 (.375) 3/8 (.375) 3/8 (.375) 3/8 (.375) .750 .875 1.000 1.125 1.125 1.187 1.375 1.500 1.625 1.687 1.875 1.937 2.062 2.187 2.562 2.750 2.8

19、75 3.000 3.125 3.250 3.437 .375 .480 .610 .719 .778 .812 .911 1.037 1.120 1.232 1.375 1.474 1.586 1.681 1.820 2.030 2.142 2.280 2.427 2.545 2.673 1.375 .063 2.625 .094 4.625 .125 1.375 .063 1.688 .063 2.563 .094 1.125 .063 1.375 .063 2.125 .094 1/ Minimum diameter of size of piece 1 before molding.

20、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 43.3 Resistance to accelerated aging. Packing shall withstand the test specified in 4.4.1 without hardening or undergoing any change which indicates deterioration. 3.4 Molding. The rounde

21、d, class 1, packing shall be capable of being readily molded or prefabricated into packing sets. This capability shall be determined by the test described in 4.4.3. 3.5 Performance. Packing shall be capable of remaining tight indefinitely, and shall have no deleterious effects upon the sheathing of

22、electric cables or upon the metallic armor of electric cables, where used against water, air, or gas at pressures from atmospheric to 25 p.s.i.g. (.1724 MPa) at temperatures up to 212 F (100 C). (see 4.4.2). 3.6 Compressibility. Packing shall be formed under the minimum pressures specified in table

23、II with the packing and molds maintained at a minimum temperature of 100 F (37.8 C). When tested as specified in 4.4.3, the height shall be not less than 80 percent of the original height. For packing, class 1, furnished in bulk, spools or reels, check compressibility of all diameter of cable and pa

24、ckings in mold sizes equal to stuffing tube sizes C, L, R, and V, respectively, in the above manner. Table II - Molding pressures. Type Size Minimum pressure (p.s.i. of annular area of packing) I I IA, II IA, II A J K Z A R S - Z 600 400 600 400 4. VERIFICATION 4.1 Sampling for conformance inspectio

25、n. 4.1 Sampling lot. All packing of the same class, composition, type, or size shall be considered a lot for purposes of acceptance inspection. 4.1.2 Sampling for examination. Sample sets or spools shall be selected at random in accordance with ASQ Z1.4 at Inspection Level I for the examination of 4

26、.2.1. The Acceptable Quality Level shall be 2.5 percent defective. 4.1.3 Sampling for tests. Sample sets or spools shall be selected at random in accordance with ASQ Z1.4 at Inspection Level S2 for tests specified in 4.2.2. 4.1. 4 Sampling for compression test. A random sample of sets or spools shal

27、l be selected from each lot in accordance with 4.1.3 and subjected to the test specified in 4.3.3. 4.1.5 Sampling for production check test. Three yards of rounded packing and two sets of preformed packing from the first lot of each type and class and 54 in. (137 cm) of rounded packing and one set o

28、f preformed packing from every tenth lot shall be selected from the same class and type for the tests specified in 4.3. The samples shall be chosen so that over a period of time a representative selection of sizes will be sampled. 4.2 Conformance inspection. Provided by IHSNot for ResaleNo reproduct

29、ion or networking permitted without license from IHS-,-,-MIL-DTL-16685E 54.2.1 Visual and dimensional examination. Each of the sample sets or spools (see 4.1.2), shall be visually and dimensionally examined to verify compliance with this specification. Any set or spool in the sample containing one o

30、r more visual or dimensional defects shall not be offered for delivery and if the number of defective sets in any sample exceeds the acceptance number for that sample, this shall be cause for rejection of the lot represented by the sample. 4.2.2 Conformance tests. Unless otherwise specified conforma

31、nce tests shall include the tests specified in 4.3 for each size, type and class of packing. 4.2.2.1 Compression test. Each of the sample sets or spools selected in accordance with 4.1.4 shall be tested in accordance with 4.3.3 to verify compliance with this specification. If any of the packing does

32、 not meet the requirements of this test, this shall be cause for rejection of the lot represented by the sample. 4.2.2.2 Production check test. The sample selected as specified in 4.1.5 shall be subjected to the tests specified in 4.3. 4.2.2.2.1 Action in case of failure. Lot acceptance and rejectio

33、n will normally be on the basis of sampling, examination and tests specified in 4.1, 4.2.1, and 4.2.2.1 only, and acceptance will not be withheld pending receipt of the test report on the production check test samples. However, upon receipt of an unsatisfactory report on any sample chosen for produc

34、tion check tests, additional samples shall be selected from every subsequent lot offered for delivery. These samples shall be subjected to the tests wherein failure was observed. Lots shall then be accepted only upon receipt of a satisfactory test report on the samples so selected. This additional t

35、esting shall be discontinued and lot acceptance returned to the normal basis when two successive lots have been accepted. 4.3 Test procedures. 4.3.1 Accelerated aging test. Specimens shall be suspended in an electrically heated oven and shall be subjected to dry circulating air at 200 F (93 C). for

36、1000 hours without hardening or softening or without changing in any other respect which will indicate that the material is deteriorating. 4.3.2 Performance test. This test shall be conducted in representative sizes of bulkhead stuffing tubes. Both plain and armored cable (including sheathing materi

37、al of polychloroprene, impervious resins and thermoplastic resins) shall be used during the test. After the packing has been installed in the tubes, the gland units shall be drawn up snugly with a wrench 20 in. (50.8 cm) in length. An air pressure of 25 p.s.i.g. (.1723 MPa) for bulkhead stuffing tub

38、es shall then be applied within the apparatus and any leakage that occurs from the tubes shall be noted and recorded. The air, with pressure still applied within the apparatus, shall be heated to a temperature of 212 F (100 C) by means of a water bath surrounding the compartments. These conditions s

39、hall be maintained for 1.5 hours and any leak which occurs from the tubes shall be noted and recorded. At the end of this time the apparatus shall be allowed to cool and, when cold, the leakage from the tubes shall again be recorded. The above conditions shall be repeated at least three times. On co

40、nclusion of the test, the packing shall be removed from the tubes and the cables examined for crimpage, deformation, or evidence of gross damage by chemical attack of armor or cable sheath. If any of these mentioned defects are in evidence, this shall be cause for rejection of the lot represented by

41、 the sample. 4.3.3 Compression test. The adequacy of the molding pressures, as specified in 3.6 shall be determined as follows: Measure the height dimension (h-I, h-IA or h-II of figures 1 and 2, as applicable) of a sample of preformed packing. Place the sample in the corresponding size mold and sub

42、ject it to the pressure specified in 3.6 for a period of 3 minutes. Release pressure and measure the same dimension as soon as the set is removed from the mold. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 6Figure 1 - Type I sizes (

43、A to J) Type IA (all sizes) Type II (all sizes Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 7Figure 2 - Type I (sizes K to Z) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-

44、16685E 8Figure 3 Piece 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 9. Figure 4 - Piece 2.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-16685E 105. PACKAGING 5.1 Packagin

45、g. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requireme

46、nts. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated pa

47、ckaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The packing covered by tnis specification is intended for use for stuffing

48、 tubes for electric cables (see table III) . Table II - Application of packing types, class 2. Stuffing tubes Plugs and outlets NAVSHIPS Drawing or Specification Number Packing type required NAVSHIPS Drawing or Specification Number Packing type required MIL-S-24235/9 MIL-S-24235/10 MIL-S-24235/12 9-S-4436-L, ALT 9 or later 9-S-5166-L ALT 10 or later 9-S-5166-L ALT 9 or earlier I I I IA 9-S-4799-L 9000-S6202-74438 MIL-S-24235/11 MIL-S-24235/13 MIL-S-24235/14 II size B II II 6.2 Acquisition requirements. Acquisition documents should specify the following: a. Title, number, and date of this