NAVY MIL-B-21160-1957 BLADDERS FLOTATION MK 2 MOD 0 AND MK 2 MOD 1《MK 2 MOD 0 和 MK 2 MOD 1浮选气泡》.pdf

1、MIL-B=2116O(NOrd) 29 November 1957 MILITARY SPZCIFI CATION BLADDER, FLOTATION, MARK 2 MOD O c 1. SCOPE 1.1 Scope. - This specification establishes the requirements for the procurement of Flotation Bladder Mk 2 Mod O, Bureau of Ordnance LD 288859, which is used to recover submerged Orhan ce i tems. 1

2、.2 Classification. - This flotation bladder is of one type and one class. 2. APPLICABLE DOCUMENTS 2.1 The following specifications, standards, drawings, and publications or such portions thereof as designated herein of t.he issue in effect on the date of invitation for bids form a part of this speci

3、fication: SPECIF1CATI:ONS FEDERAL . CCC-T-191 Textile Test bllsthods PPP -B-621 Boxes, Wood, Nailed and PPP-B-636 Boxes, Fiber Lock-Corner I MILI TARY .f MIL-B-131 Barrier Material, Water- Vapor-proof, Flexible STANDARDS MILITARY MIL-STD- 05 Sampling Procedures and Tables for Inspection by At tribu

4、te a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Karking for Shipment and Storage RBAWZNGS NAVY DEPARTNE3 T BUORD LD NO. Flotation Bladder Mk 2 Mod 200059 0 and all parts and subas- sernblies liated thereon DWG. No. 125302s Segment, Bladder PUBLI

5、CATIONS BUREAU OF OHDNANCE , OP 400 General Instruction for the Design, Manufacture, and Inspec tion of Naval Ordnance Equipme. (Copies of specifications, s6ar$grds, drawings, and publications required by contrtaTors in connectin with specific procurement functions mould be obtained from the procuri

6、ng activity or as directed by the contracting officer. 1 2.2 Other Publications. = The following documents form a part of this specification. Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. NATIONAL BUREAU OF STANDARDS PUBLTCPITIONS Handbook H28 and Screw

7、thread standards for 1950 Supuleirient the Federal Services (AppllCation for copies should be addressed to the Superintendent of Documents, Government Printing Offlce., Wmhington 25, D, C.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.2 Mate

8、rials, - Unless othePwise specified in the contract, requisition or order, all materials and purch-ased parts entering ihto the final assembly of tl flotation bladder shall conform strictly to the detailed requirements in.dicated on the drawings, and. specifications listed on BTJORD LD 288859. sions

9、. - Finishes, coatings, construction and dimensions for the flotation bladder shall be strictly in accordance with the applicable drawings, specifications, and publi- cations listed in BUORD LD 288859. 3.2.3 Finishes, Coatings, Construction and Dimen- 3 Provided by IHSNot for ResaleNo reproduction o

10、r networking permitted without license from IHS-,-,-MIL-B-2L160 20 9 99777Ob 0191713 b 3.2.4 Moisture, Fungus and Corrosion. - The flotation bladder shall be rendered moisture, fungus and.corrosion resistant in accordance with the detail requirements specified in the drawings and specifica- tiona li

11、sted in BRD LD 280059. assemblies and partstshall be in accordance with the 3.2.6 Interchangeability. - Component parts of 3.2.5 Markirig. - Marking of assemblies, sub- * applicable drawings listed on BUORD LD 288859. assemhied units (unless otherwise specified on the applicable drawings) fabricated

12、 in strict agreement with -their applicable drawings shall assemble with mating components of the unit without selection OP fikting. of a unit, selection or fittkg is required and changes in dimensions are necessary, no changes in the partis as -delineated on applicable brawings shall be made withou

13、t prior reviaion and correction of the appIicable drawings. 3.2.7 Gages, - The contractor shall provide himself wigh whatever gages are necessary and adequate to insure that the material to which this speoifca- %on appLies wiI.5. meet th8 dimensional requirements shown on the applicable drawings. If

14、 so stipulated in %he contract, ordel+, or requfaition, the Government will furnish drawings of pertinent Navy Final Inspection Gagea for, guidance fn ehe design of khe contractors inspection gages. However, such procedure shall not serve to reli0178 the contractam of his rssponsihiiitg fn .the desi

15、gn and manufactura of such gages as may be required in tihe sa*bisfactory fulfillment of the contract requirements, but; is intende ta facllit;ati;e atoceptance of all components and assemblhs by Navy Final In- spection Gages. If, during assembly of the fabricated parts Provided by IHSNot for Resale

16、No reproduction or networking permitted without license from IHS-,-,-MIL-B-21360 20 7777706 0373734 9 3.2.8 Threads. = Unless,otherwise specified, al1 threads shall be in accordance with the,NaLional, . Bureau of Standards Handbdak H28 and Supplements- thll meet khe foillowing performance requiremen

17、ts. apd-product characteristics ,. construction shall be as shown on the drWinge listed on Bureau of Ordnance LD 280859. 1. . 3 *j 33lrDesig and oonstruc6ion. TQ design ahd: . 33,2 nflaiioii eguremknts 3.3.2.1 !%e tnffaeed .flotatkonr bladder shall lift; . an object that has a submer$ed.we bouyancy)

18、 of. .100Q pounds, fmm- 8. water, when tested. in aooordaae w 3 . 3 . 2-.1 The oarryfng paseshal: open. er, when tested in accordance with 4. essure insids the bled Of 3.5 f pSi-abOVthe mwur.e of bb Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL

19、-B-23LbO 20 777770b 0373735 T MJL-B-21160(NOr . 3.3.2.4. The loaded bladder shall float at the sur- face of the water without resubmerging for a period of one hour minimum, when tested in accordance with 44h3.4 . . -. 3.3.3 Envronmental conditions. - The flotation bladder shall operate satisfactoril

20、y during and after exposure to the environments described in the follow- ing paragraphs. 3*.3.3.1 Low temperature. - The flotation bladder shall, be aubjecterd to the temperature conditions specified in 4,5.3.1 and shall show no corrosion or damage and. shall pass the inflation test of 4,5.3.1. Ther

21、e shall be no leakage causing loss of air pressure. There. l Goveurnment inspectin, - The Goverryenk inspector will make such inspections as are necessary to determine that components and assemblies are in accopdance-with the requirements of the contract,. pertinent-drawings and specifications, Unle

22、ss other- wise spe-cif led, tlhese inspections wil be conducted in accordance with instructions contained in OP 400. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license

23、from IHS-,-,-MIL-B-2LLbO 20 m 9999906 OL9L917 3 m 4.1.3 Inspection otb - An inspection lot is a collection of units of product manufactured or processed under substantially the same conditions and offered for inspection at one time, or during a fixed period of time. 4.l.3.l Inspection lot size. - Th

24、e inspection lot size is the number of units of product in an inspection lot. The minimum and maximum inspection lot sizgs for inspection purposes are determined by the Government inspector, and may differ from the quantity designated in the contract or order as a lot for shipment, or other purposes

25、. wise specified by the contract or order, a random sample of bladders, cloth and seams will be selected from each grand lot by the Government inspector. samples will be submitted to+n activity designated by the Bureau of Ordnance, for tests to determine compliance of the samples with the requiremen

26、ts of the contract, this specification, and the drawings. A grand lot shall consist of successively produced bladders Ln the quantity determined by the Government inspector, but not exceeding 300. From ehch grand lot of 300 to 181, inclusive, samples of five wi be selected as specified in 4b.2. When

27、 the grand Lot size is i80 or less, the size of the sample will be in accordance with the appendix of MIL- STD-105, Tabla VIf, Inspection Level LS, as follows: For grand lots of 66 to 180, the sample size.will be three; for 2 to 65, two. For acceptance criteria, see 4.3.2. 4.2 Contractorfs inspectio

28、n. - The contractor shall determine, by whatever means or methods he desires and to the extent necessary, that all supplies and ser- vices and parts thereof offered for Government acceptance or delivery conform with the requirements of the contract and all associated applicable documents. 4.1.4 Peri

29、odic production sample. - Unless other- These 4.3 Classification of tests. - The inspection and testing of the bladder shall be classified as follows: 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. c Provided by IHSNot for ResaleNo reproduction

30、or networking permitted without license from IHS-,-,-44 3. 2 The carrying case shall Oper, automatically when the bladder is inflated, as specified in 3.3.2.2. 44.3*3 The inflation and relief valve shall main- tain the air pressure inside the bladder at 3.5 (I1,O) psi above the pressure of the surro

31、unding water as the .bladder ascends (or 8s the pressure in the test tank . is reduced) as specifie 2n 3.3.2.3. 4,4.3.4 The bladder shall suppopt its load eter breaking %he riurftice (OP. at zero gags tank prearsure), without raisubmergfng, or a period of one hour minimum, 88 epeoified in 3c3.2.4, 4

32、*4.3.5 A3ptmc8 criteria for the inflation teat, ed In accordsuzcs wt;h 4,l.XL and 4.1 the fatlure. OS any specimen ta maef any of the recyu%ements of any sf the tesda representad. rihall b CUSe for Prtjs pmbedure. . 4,5.2.1 Hydrostatic test, - The hgdrostatlc. teat applied to the coate9 sids of the

33、fabrlc aha21 be .perfomred oaording to CCC-T-191, Method 5512* using a Mullen-Tester adapted by removing the aaphragm and using wa6er alo the liquSd, The minhm acosptable preseurs for the Indivbdunt spsciuen shall be 450 pad with the mbbbr coating next tia the WELBP. * a Provided by IHSNot for Resal

34、eNo reproduction or networking permitted without license from IHS-,-,-4.5.2.2 Blocking test. - The blocking test s.hall - be performed accrding to CCC-T-191, Met6od 5872. The in CCC-T-191, Method 5872. 4.52.3 Flexibil-ity test. - From-each sample piece of cloth, two strip specimens shall be cut para

35、llel to- the warp threads and two strip specimens ahall be cut -. parallel to the filling threads. The minimum sti-ffness value for the specimen shall be 3125 inches in the warp r specimen shall show no evidence of blocking as degcribed L direction and 3.5 inches in the fill direction. . 4.5;.2.4 Fl

36、exibillty after-heat treatment. - The change in stiffness shall be determined according bo CCC-T-191, Method 5870 and 4.5.2.3 above. acceptable decrease in stiffness for the specimen shall be 8 per cent in the warp direction and-4 per cent in the fill direction. 4.5.2.5 Flexibility after water leach

37、ing. - The change in stiffness shall be determined aocoraing to CCC-T-191, Method 5830 and 4.5.2.4 above. The maximum- acceptable increase in s-tiffness for te specimen shall be 8 per cent in the warp directiondid 8 per cent in the fill direction. 4.5.2.6 Natural weathering testr - A 4-inoh by. 4-in

38、ch fabric specimen, after unprotected exposure to the elements for 30 days, shall show no appreciable change in color, pliability or strength, and. shall show no signs of flaking, peeling, checking, cracking or The maximum -. loss of coabing. 4.5.2.7 Weatherometer test - The coated sid of a /+-inch

39、by 4-inch specimen of fabric shall be subjected to 100 hours in the Twin-Arc-Weatherometer; the tem- perature of the atmosphere inside the weatherometer shall be 125 I So F. After this exposure, the spcimen shall not have lost more than 25 per cent of its or- ginal hydrostatic resistmce as determine

40、d for the cloth in 4.5.2.1.: There shall not be any appreciable increase in the stiffness of the specimen. 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4,5,2,8 Breaking strength test, - The breaking strength ahall be determined according to CCC

41、-T-191, 14ethod 5100, foi* a spcimen shall be 296 pounds. The minimum acceptable individual value 4,5,2,9 Ageing test, - The ageing test shall be performed according to CCC-T-191, Method 5852. The maxinum accaptable increase in breaking strength for the specimen shall be 4. per cent. . 46 to 24.0 ho

42、rns (10 cycles). OF the 24O-houill perio shall be packed in a box, wood, nailed conforming to the requirements of PPP-B-621, Class 2, Style 2, Type 2. Corrugated liners shall be used to protect the barrier material. 5.2.2 Levels B and C do not apply 5.3 Marking 5.3.1 Speuial markings. - Each package

43、 shall be clearly labeled or marked nDO NOT STORE NEAR STEAM LINES OR OTHER LOCATIONS WHERE TENPERATURES IN EXCESS OF 125O F. ARE LIKELY TO OCCUR“, 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- U IL - 8-2 I I b O - - L -.- -.-I- . ._. - ._._ .-

44、. ,.-. ,_. - 0b OLL26 ! 5.3.2 Normal markings, - In addition to the soecial . markincp required by the contract, order, or 5.3.1, all containers shcill be marked in accordance with require- ment s of MIL-STD-129. 6, .NOTES 6.1 Intended use, - The Flotation Bladder Mk 2 Mod O is intended for spare us

45、e in the *recovery of submerged items having a negative buoyancy of up to 1000 pounds froma maximum depth of 150 feet of water, speoify the title, number and date of this specification and exceptions to this specification, applicable drawings and other documenta. between,kOO F. and 700 F. injurious

46、than low temperatures. than 125O F, are to be avoided, if possible. The ideal humidity conditions for storage are between 40 per oent and 60 per cent, Notice: When Government drawings, specifications, OP other data are used for any purpose other than in connection with a definitely rebatsd Governmen

47、t procure- ment operation, the United States Uavernment thereby incurs no responsibility nor any obligation what8oevsr; and the fact that the Government may have formulated, furni8hed, or in any way supplied the said drawingi, speaificatione, or other data is not to be regarded by implication or oth

48、erwise as in any manner licensing the holder OF any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any invention that may in any way be related thereto. 6.2 Ordering data. - Procurement documents should 6.3 Storage. - The ideal storage temperature is High temperatures are more Temperatures higher - ,.-. . . _ - - /- . - _ - ._c ._., . . 17 I : . . I: . , . . I . I . . . . +-;z I“ . t- . . ,I .LI, - . . *.I . I. “ - .-. . t. , . , . L. . . . . . r: . . .- _- i . L- I- -