1、- _ IL-F-81100A(OS) 22 May 1980 SUPERSEDING MIL-F-81100 (IS) 24 June 1964 and AWNDMENT 3 8 September 1975 MILITARY SPECIFICATION FLOAT, DRILL 3INE, MARK 17 MOD O This specifixation Is approved for use by the Naval Sea Systems Cornand, Department of the Navy, and is available or use by allllepartment
2、s and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the Float,.Drill Mine, Mark 17 Mod O, LD 486283, The float is of one type and one class. 2. APPLICABLE DOCUMENTS- 2.1 issues of documents. The following documents, of the issue in effect on the date of InvItat
3、fon for bids or request for proposal, form a part of tiis spec2fikat2on to tHe extent specified herein. STANDARDS FEDERAL FED-STD-151 Netals; Test Yethods FED-STD-H28 Screw - Thread Standards for Federal Services Benef icial comments (.reconnenm and any pertinent data whicii may be of use in improvi
4、ng this document should be addressed to: Ordnance Station, St!andardizat$onJ-Documentation Divlsion (501) Indian Head, %ID 20640, by using the self-addressed Standard- ization Document Improvement Proposal (.?ID Form 1426) appearing at the end o tHis document or by letter Commanding Officer, Naval $
5、 a PAGESe Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-454 DOD-STD-2101 DMWINGS LD 486283 LD 496451 A _ MIL-F-8LLOOA 13 S 7779706 0358646 L -1 Sampling Procedures and Tables for Inspection by Attributes Mar
6、king for Shipment and Storage Standard General Requirements for Electronic Equipment. Classification of Characteristics NAVAL SEA SYSTEMS COMMAND (CODE IDENT 10001) Float, Drill Mine, Mark 17 Mod O Container, Shipping, for Float Mark 17 Type herein are listed on LD 486283 unless otherwise drawings r
7、eference designated. (Copies of specifications, standards, drawings and publications required by contractors in connection with specific pro-curement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 General requirements. 3.1.1 F
8、irst article sample. Unless otherwise specified in the contract (see 6.2b), a first article sample of floats shall be manufactured and prepared for delivery using the methods and procedures proposed for the production lot, and tested for the purpose of determining, prior to starting production, that
9、 the contractors production methods are capable of producing items that comply with this specification and the design. The sample size shall be as specified in the contract. for a first article may be waived by the contracting officer if satisfactory production has been recently accomplished by the
10、contractor. The requirement 3.1.2 Fabrication. The floats, shall be manufactured in accordance with the drawings listed on LD 486283 and as specified herein. _. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-81100A (OS) 3.1.3 Interchangeabil
11、ity. Component parts of assembled items (unless otherwise specified on the applicable drawings) fabricated in accordance with applicable drawings shall be interchangeable and shall assemble with mating components of the item without selection for fit or performance. 3.1.4 Screw threads. Unless other
12、wise specified, all screw threads shall be in accordance with PED-STD-H28. The class or fit of threads shall be as specified on the applicable drawing. 3.2 Performance requirements and product characteristics. The floats shall meet the following performance requirements and product characteristics:
13、3.2.1 Leakage. The Float Weldment, Dwg. 1874731, after the completion of all machining and grinding operations, and with all surfaces free of grease, paint, oil, or the like, shall withstand without leakage an internai pressure of 5 ?$ PSig. 3.2.2 Seizing. The twine seizing securing the outer layer
14、of the recovery line together, as illustrated on Dwg. 1874730, shall separate to free the recovery cable when subjected to a pull of between eight and twenty five pounds. At the first two points of securement, the pieces of twine shall remain attached to the nylon line after being broken. 3.2.3 Cabl
15、e and Loop pull requirement. Each end loop of the Nylon Recovery Cable, Dwg. 1800462; the Nylon Cable Assembly, Dwg. 1665784; or sample cable (FIGURE 1) shall Withstand a 580Q-pound minimum pull without breaking the cable, breaking the loop, or pulling the loop free. 3.3 Environmental requirements.
16、3.3.1 High pressure. The floatweldment with flare well cover and inert Explosive Fitting Mark 20 Mod O in place shall withstand an external hydrostatic pressure of 67 1: 1 psig for a minimum of one hour without leakage or permanent deformation beyond the dimensional require- ments of the drawings, e
17、xcept that the 1.839 ? 0.Q30-inch dimension to the flat surfaces on each side of the central spool slot shall not exceed 1.839 !:i!# inches (see Dwg. 1874731). 3.3.2 Synthetic seawater spray. The float weldment shall withstand, without flaking of paint or corrosion of the base metal, the synthetic s
18、eawater spray test defined in FED-STD-151, Method 812.1, for a period of 48 hours. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-BLLOOA 13 7797706 0358648 5 I 3.4 Clean-up. Prior to final assembly, all parts shall be clean; and protection a
19、gainst corrosion, dirt and other forms of contamination applied. at time of packaging, shall be free of dirt, flaking or chipped paint, grease and oil (except as specified). The assembled float shall be free of burrs and sharp edges and, 3.5 Marking. Each float assembly shall be identified by the ma
20、rking “Float, Drill Mine, MK 17-0 Dwg. 486283 in accordance with MIL-STD-129. 3.6 Workmanship. Workmanship shall be in accordance with Requirement 9 of MIL-STD-454. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is respon
21、sible for the performance of all inspection requirements as specified herein. contract, the contractor 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 right to perf
22、orm any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified in the 4.2 Classification of inspection. Inspection of the floats shall be classified as follows: a.
23、 First article inspection see 4.5) b. c. Periodic production sample inspection (see 4.7) Quality conformance inspection (see 4.6) 4.3 Test equipment. The following items of test equipment are required to perform the test prescribed in this specification: a. b. A source of regulated air pressure. A w
24、ell-lighted, water-filled tank large enough to permit submerging the float with room for rotating and observing all surfaces of the float. (The chamber of 4.3f may be used if it satisfies these requirements and the contractor is making all tests (see 6.2e).) c. A rotatable mandrel capable of holding
25、 the float on the rotational axis. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-d. A pull scale capable of measuring a pull of 50 pounds in one- pound increments. e. A pull tester capable of exerting a pull of 6000 f 120 pounds on a nylon cable.
26、 f. A test chamber capable of holding a Float Mark 17 Mod O and being pressurized to a hydrostatic pressure of 100 psig. g. Necessary test apparatus to perform the synthetic seawater spray test of PED-STD-151, Method 812.1. 4.4 Test conditions. Unless otherwise specified, the float assemblies shall
27、be subjected to tests under the following conditions: a. Temperature: Room ambient 18 to 35OC (-65 to 95F). b. Altitude: Normal ground. c. Humidity: Room amblent to 95 percent relative, maximum. 4.5 First article inspection. 4.5.1 First article testing. First article sample (see 3.1.1 and 6.2b) shal
28、l be subjected to the examinations and tests of 4.8 as specified in TABLE I and FIGURE 4 at the activi“ty designated by the procuring agency (see 6.2e). to approval of the first article, shall be at the contractors risk. Further production of the floats by the contractor, prior a 4.5.2 First article
29、 approval. First article approval shall be granted when the Government, through the tests of FIGURE 4 and subsequent analysis of the test results, is assured of contractor conformance to the contract technical requirements. A first article may be disapproved when either nonconforming characterhtics
30、or unauthorized materials are found; however, conditional acceptance may be granted at the option of the Government based on analysis of detected defects. 4.6 Quality conformance inspection. Each float shall be subjected to the examinations and tests of 4.8 as designated in TABLE I. of a unit to pas
31、s any examination or test shall be cause for rejection of the unit. Failure 4.6.1 Sampling, See Note (3) under TABLE I. 4.7 Periodic production sample inspection. The periodic production sample of floats (see Note (1) under Table I) shall be randomly selected by the Goverment inspector from each pro
32、duction lot (see 6.2d); and subjected to the examinations and tests of 4.8 as designated in TABLE I and FIGURE 5 at the activity designated by the procuring agency (see 6.2e). A unit failing any designated periodic sample test may cause the sample and the lot it represents to be rejected. e 5 Provid
33、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-81100A(OS) 4.8 Examination and test methods. 4.8.1 Packaging. The marking and packing shall be examined by the contractor prior to shipment and by the Government upon receipt to determine conformance to
34、 3.5 and Section 5. 4.8.2 Examination, 4.8.2.1 Cleanliness. Prior to final assembly, verify that all parts are cleaned and protected against corrosion, dirt, and other forms of contamination. After assembly, verify that the float is free of burrs and sharp edges. At the time of packing, verify that
35、the float is free of dirt, flaking or ch3pped paint, and oil or grease other than where specified. 4.8.2.2 Fabrication. Examine the float assemblies in accordance with Dwg. 1874730 to determine compliance with this specification and the drawings as specified in 3.1.2. 1874730 shall not relieve the c
36、ontractor of his responsibility to meet all requirements of other drawings listed or referenced thereon. Examination in accordance with Dwg. 4.8.3 Leakage (M101). , Remove the Self-sealing Bolt, Dwg. 2430629-18, from the base of the flare-well member of the Float Weldment, Dwg. 1874731, and connect
37、in its place the source of regulated air pressure (4.3a). Apply internally to the weldment an air pressure of 5 While maintaining this pressure, submerge the weldment in water (4.3b) and brush away all air bubbles. Under adequate lighting, examine all surfaces including the flare-well cavity. Verify
38、 that bubbles indicating leakage are not escaping from the weldment. +l -0 psig. 4.8.4 Seizing (sampling) (Ml.02). Attach a suitable, freely rotatable mandrel with its axis of rotation perpendicular to the horizontal surface of any stationary object. utilizing the floats signal well. With the scale
39、(4.3d),grip the payout end of the recovery cable twelve inches from the float and steadily pull the cable outward, radially to the axis of rotation of the float,until the cotton thread seizing securing the outer loops together breaks and frees the cable. Regrip the recovery cable twelve inches from
40、the next point of seizing. Pull until the seizing breaks and releases the cable. Verify that the force required to separate these two points of securement is not less than eight pounds or more than twenty five pounds, and that the broken ends of the first point of securement remain attached to the n
41、ylon cable. Continue this procedure until all loops comprising the top layer of cable about the float have been released. For these remaining loops, verify that the force required to free the cable is not more than twenty five pounds. Position the float assembly on the mandrel (4.3c), 6 Provided by
42、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-81100A( OS) -_ 4.8.5 Cable and loop pull tests. 4.8.5.1 Nylon recovery cable proofing (sampling) (M103). With the Nylon Recovery Cable, Dwg. 1800462, removed from the float assembly, secure the cable loop to
43、the pull arm of the tester (4.3e) in the manner shown in FIGURE 2. and secure as specified. fails. pull out or break under a load of less than 5800 pounds. Pass at least five turns of the cable about a fixed support Apply a steadily increasing load until the cable * Verify that the cable did not bre
44、ak and that the loops did not 4.8.5.2 Nylon cable assembly proofing (sampling) (M104). Remove the Nylon Cable Assembly, Dwg. 1665784, from the float assembly and secure it to an appropriate fixture on the tester (4.3e) as shown in FIGURE 3. Apply a steadily increasing load until the cable fails. did
45、 not break and that the loops did not pull out or break under a load of less than 5800 pounds. Verify that the cable 4.8.5.3 Sample cable proofing (M105). Four sample cables as shown in FIGURE 1 shall be fabricated and tested prior to initiating production. that is used to make the Nylon Recovery Ca
46、ble, Dwg. 1800462, and the Nylon Cable Assembly, Dwg. 1665784, The splicing techniques used in making the sample cable loops shall be in accordance with the requirements of Dwg. 1665784 and 1800462. Attach each end of the sample cable to the pull arms of the tester (4.3e) with %-inch diameter pins.
47、Apply a steadily increading load until the cable fails. not break and that the loops did not pull out or break under a load of less than 5800 pounds. The sample cables shall be made from the same nylon cable Verify that the cable did 4.9 Environmental tests. 4.9.1 High pressure. Install and secure t
48、he flare well cover on the float as in service use. Install suitable watertight plugs ln the holes in the base of the signal tube. Weigh the dry float to an accuracy of one ounce and record the weight. test chamber (4.3f) and pressurize the chamber to 67 k 1 psig hydrostatic pressure. Keep the chamb
49、er pressurized for one hour minimum. Reduce the pressure in the chamber to zero psig and remove the float from the chamber. Carefully dry all external surfaces of the float. over the above recorded weight of the dry float. there is no water in the flare well and that the dimensions of the flare well and float conform to the appropriate drawings. the dimension to the flat surfaces on each side of the central spool slot does
