MIL-I-15265B(X-RPS) MfL-I-15265A(SHfPS) …everyspec.com/MIL-SPECS/MIL-SPECS-MIL-I/download.php?spec=MI… · i, mflitary specification.*.. djsulation, electrical, plastic mil-i-15265b(x-rps)

I , MfLITARY SPECIFICATION.*. . DJSULATION, ELECTRICAL, PLASTIC

MIL-I-15265B(X-RPS)15 March 1967SUPERSEDINGMfL-I-15265A(SHfPS)11 Aprfl 1963(See 6. S)

(SUSMARINE BUS BAR COVEWG)

1. SCOPE

1.1 --- This specification covers pfastic, electrical tnsufating materials used primarily for coveringsubmarine bus bars and battery bdercell connections. Other applications may be considered where a toughplastic covering is needed over metal surfaces.

1.2 Classification. - Plastic electrical tnsulatkm shall be of the following types, as specified (see S. 2)

Type Description

P Resin - plasticizer dispersion (pla8tiaol)

T Heat - reactive thfn wall non-rtgid tubing

2. APPLICABLE DOCUMENTS

2.1 The followdng documents of the issue tn effect on date of invitation for bids or request for proposal,form a part cd the specification to the extent specff ied berein.

● .STANDARCS

FEDERALFED-STD-406 - Plastics Methcds of Test@!.FED-sTD-601 - Rubber Sampling and Testtng.

MiLfTARYMIL-STD-104 - Limits for Electrical Insulation Color.IvRL-STD-1O5 - Sampling Procedures and Tables for inspection by Attributes.

(Copies of specifications, standards, drawings, and publications required by suppliers tn connection withspec Uic procure ment functions should be obtained from the procuring activity or ae directed by the con-tracting officer. )

2.2 ~Ot.- Tbe following dcsxme”ts form a part of this specific+ ion to the extent specUiedherein. Unless otherwise indicated, the iseue in effect on date of invitation for bids or reqnest for proposalshall apply.

AMERIcAN Smt5TY FOR TE5TffiG AND MATERL+N STANDARDSD- 149- Dielectric Breakdown Voltage and Dielectric Strength of Electrical Immlattng hfaterf ais at

Commercial Power Frequencies.D-257 - Test for Electrical Resistance of fnsulatfmz Materials.:.‘f D-675 - Testing Non- rfgid Vfnyl Chloride Polymer-Tub@

(Application for copies should be addressed to the American Society for Testing and Matertals, 1916 RaceStreet, Philadelphia, Pa. 19103. )

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UNfTED STATES TESTfNG COMPANYRePorhf Test #S3413.

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Downloaded from http://www.everyspec.com

(Application for copies eho.ld be addressed to Naval Ship Engtneertng Center, Code 6634c, Washington,D. C. 20360. )

UNIFORM CLASSIFICATION COMMITTEEUnfform Frefgbt Classification Rules.

(Application for copies should be addressed to the Off Ictal Clas8tiication Committee, 1 Park Avenue,at 33rd Street, New York, N. Y. 10016. )

(Technical scc.iety and technical association specifications and standards are generally available forreference from lfbraries. They are also distributed among technical groups and using Federal agencies. )

3. REQUBWMENTS

3.1 QuaUficatton.- Electrical tnsulatJmg material furnished under this specification shall be productswhich are qualff ied for listfng on the applicable qualff led products list at the t tie set for. opentng of bids(see 4.2 and 6. 3).

3.2 ?.faterfals. -

3.2.1 Twe P.- The restn, plasticizer, fUler and colortng matter shall be fm.nmlated to comply withthe requirements spectf ied herein; tbe materfal shall fuse to tcmgb, flexible non-porous coattng at ternpem-tures between 30WF. a“d 40WF. when applied to lead coated copper bars and to battery Intercell ccmwsctions.

3.2.2 Type T.- Tbe tubing sIw1l be of tbe beat reactive plastic twe formulated to comply with therequiremenmffied beretn. The tubtng shall shrink to form a tough, flexible mm-porous covering attemperatures between 275-F. and 300’F. when applied to lead coated copper bars. ,,

3.3 =- Tbe color of the type P material after beat curing shall be red tn accordance with MfL-STD- 104. Tbe color of the type T material shall be black in accordance with MIL.STD- 104,

3.4 Stze..—

3.4.1 Twe P.- TWe Pshallbe furnished asaltiuid tiquatities aespecUied (see 5.2. l.l. l).

3. 4.2 Type T.- Type T Aw.llbefurnishedtn sizes and wall thicknesses as follows:

Ordering Lay flat width (Before reaction)Bus Bar size Sf2e XS ship~ed Wall Thickness

Inches Inch1/4 x 2

fncbesBB200 2-7/8 ! 1/4

1/4 x 2-1/2 BB250 3-3/6 ! 1/4{

0.020 + 0.0101/4 x 3 BB300 3-7/8 ? 1/4 -0.0001/4 x 4 BB400 4-15/16 ? 3/8 r

1/4 x 5 BB500 5- 15/16 : 3/8[

0.023 + 0.010

1/4 X 6 BB600 7 ! 1/2 -0.000

3.5 Property valnes. - Standard specimens of tbe material shall conform to the property valwss shownin tables U (qualification) and N (batch acceptance).

t=

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3.6 instructions for use. - Each roll, can or pail shall have a label attached thereto covering the method ?’of applicatbm fncludtng preparation of surface, precautions In handling, cure time and temperature, build.

3.7 Workmanship. - The plastic fnsubdtng materfals shall be manufactured in a careful and workmanlike ‘-. .manner,

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MfL-I-15265B(SH1PS)

4. QUALITY ASSURANCE PROWSIONS

41 ReeponsibUity for inspection. - Unfess otherwise specified in tbe contract or purchase order, the.<: supplier is responsible for tbe performance of all bmpection requirements as specified herein. Except asotherwise specif ied,’ the supplier may utilize bis own facilities or any commercial laboratory acceptable totbe Government. The Government reserves the right to perform any of the inspections set forth i“ the speci-

.“ fication where such inspections are deemed necessary to assure supplies and services conform to prescribedrequire ments.

4.2 Qualification tests. ~/- Qualtiication tests shall be conducted at a laboratory satisfactory to theNavai Ship Engtneertng Center. Samples of material shall be furnished in quantities sbovm fn table 1. Quali-fication tests shall consist of the tests spectfied fn table U.

Table 1- Sizes and quantities of materialfor qualification tests.

T~e Size Amount

P 1 gallon

T each 5 feet, lineal

4.3 Samplfng for batcb inspection. -

4.3.1 &@. - All materfal of the same composition, typ, and size manufactured under essentially tbesame conditions within a period of 15 days and offered for delivery at the same time shall be considered a lotfor purposes cd quality conformance inspection.

4.3.2 Sampling for examination. - Samples of materials shall be selected from each lot for examination

●of visual and dimensional characteristics b accordance with table III. Tbe lot stze and sample size shall bestated in terms of rolls or containers.

4.3.3. Sampling for quality conformance tests. - One fifth of the rolls or containers eelected for the vis-uai or dimensional examination shall b subjected to tbe mwlitv conformance tests spec ffied i“ table N. how-ever, the smallest number cd rolls or conta”tiers eelecteci for &y &mple shall be t;o. U the contract ‘callsfor delivery of 50 feet (or 5 gallons) or less, only one roll or package shall be selected.

Table U - Qualification tests for property values of insulation.

1Property tobe tested

Ihmllatiollresistance

-+, ImpactAbra6 ion

Iresistance. .

Testparagrapl

4.6.1

4.6.2

4.6.3

4.6.44.6.5

I

Nmnber ofspecimensfor each stzeand type

(see table 1)

1

1

11

-1 +1Tests per Conditionirqspecimen (see 4.5)

A

3 ~-24/23 ?/

3 Dt-24/23 !/

3 A3 A

unitofvalue.

Mfnimumvolts permil

Mfnim.mme’gohms

Maximumgrams per1000revo-lutions

-1Propertyvalue

250

200

No damage

0.05

(s~~ 6.3 and 6. 4j.

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MfL-I-15265B(SHIPS)

Table U - Qualification tests for property values of Insadation. (continued)

?roperty tobe tested

ieat resistancepIastlc flowicid resistance

~lame resistantIgnition time

Burning time

Weight loss

!oxicity whenheate~

Carbon dioxideCarbon mon-oxide

AmmoniaAldebydesHydrc?ge”chloride

Stdphur di-oxide

Hydrogencyanide

Uxides ofnitrogen

estmagrapl

,6.6

,6.1

,6,6

6.9

Number ofepecimensfor each sizeand type

~

1

1

1

—

T3 E-1/2/120

1 D8-46/70 .$

3 A

3 A

/Matertals, dtiensions, andworkmanship./Short time./Imraersion in 1 percent salt water for the time and temperature shown./Immersion tn 20 percent s“lphuric acid for the time and temperature shown.

Unit ofvalue

Maximuminches

Percentswelling

Exudation ofplasticizeror othermatertaldepositedas stickyoily filmon surfaceOf speci-men

Minimwnseconds

Maximumseconds

Maxtmmnpercent

Maxtmmnparts permillion

-1Propertyvalue

0.025

2.0 max.

None

50

75

25

15,000

1,50050050

1, 100

100

60

100

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● fvffL-I-15265B(SfffPS) “

Table Ifl - Samvlbw for examination.. .

Lot sfze Sample sfze AcceptanceJ

Rejectionnumber of rolls or cOn- n.mber uwnberrolls or tatners to be (defective) (defective) 1containers examined

i Ztos 2 0 19to 15 3 0 116 to 25 5 0 126 to 44 7 0 141 to 65 10 0 166to 110 15 0 1111 to 180 20 1 2

Property tobe testedrGeneralexaminatt’on 1/

Dielectricstrength .!?/

●Insulationresistance

Acidre ststanc e

.0

Table N - Quality conformance tests for property values of fIISUhtiOn.

1.6.1

1.6.2

L 6,3

,.6.1 I?/

Tests perspecimen

3

3

1

%nditionbq(see 4.5)

>t-24/23

)t- 24/23

)~-46 /70 SI

Unitofvalue

A/M=t~rt@ (fh~”sj~”~, a“d workmanshipz/Short time.2/As required by lot size (see 4.3. 3).~/timersio” in 20 peree”t sulphuic acid for tbe time and temperature shown.

4.4 Quality conformance inspection. -

Mfnimumvolts permil

Minimummegohms

Percentswelling

Exudationof Plasti-cizer orother ma-terial de-posited assticky Oi%yfilm on sur-face ofspecimen

Propertyvalue

!50

!00

;.0 max.

lone

4.4.1 Examination. - Each of the samples selected in accordance with 4.3.2 shall be visually .md di-mensionally examined to verify compliance with the requirements of 3.3, 3.4, 3.6 and 3.7. Any sample rollor container havfmg one or more visual or dimensional defects shall be cons Idered defect ive, and if the num-ber of defective rolls or containers exceeds the acceptance number for the sample, this shall be cause forrejectim of the lot represented by the sample. fn the case of rolls, the outer Layer of the rolls shall be dis-carded and the next five linear feet shall be examined.

4.4.2 Quality conformance tests .- Quality conformance tests shall be co”d”cted on samples of materialselected fn accordance with 4.3.3. Two linear feet from each roll or one quart from each contslner shall besubjected to the tests specff ied in table N. Results shall be averaged for each sample roll or conWner

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●bffL-I-15265B(sHIPs)

represented to determfne conformance with thfs specification. K the average for any sampk roll or containerfafls to .cotiorm with any requirement, thfs shall be cause for rejection of the lot.

4.5 C,-mditionfng.- Materials shall be conditioned before befng tested, as specff ied in table U or N, as <fapplicable.

45.1 Equipment. - Ccmditioning chambers and baths shall be such r+.sto maintafn the specified tempera-ture plus or minus 2C. and the specffied relative humidity plus or minw 2 percent. i

4. 5.2 Destgnatbm. - Conditkmfng procedures shall be designated as follows

(a) A capital letter indicating the general condition of the specimeq that is humidity, immersion,and temperature mmdit icmlng,

(b) A number indicating in hour.q the duration of the conditioning.(c) A number tndicatfng in degrees centigrade the conditioning temperab.we.(d) A munher indicating refative humidity whenever relative humidity is controlled. (Relative

humidity obtafned over calcium chloride shall be take” as zero. )

The number sbail be separated from each other by slant marks, and from the capital letter by a dash.

4.5.3 Nomenclature. - The following letters shall he used to indicate the respective general conditbmiw

Condition A - as receive~ no special conditiomng.Condition C - The specimens shall be conditioned far tbe time and at the temperature and relative

humidity specff ied fn tables ff and N, as applicable.Examplem

C-96/23/O -96 hours, 23-C. ,0 percent relative humidityC-96/23/50 -96 hours, 23”C., 50 percent relative humidityC-96/23/96 -96 hours, 23”c., 96 percent relative humidity

Condition ~ - The specbnen shall be immersed in 1 percent salt water for the time and at the tem-perature specff ted

Example ●~ - 24/23 -24 hours, 23°C., in 1 percent salt water

Condition E - The specimen shall be conditioned for the time and at the temperature specff ied.Examples

E-400/100- 400 hours, 10VC.E-2/100- 2bours, 10WC.E-400/130- 400 hours, 130’C.

4.6 Methods of tests. - The methods and procedures shall be as specified i“ 4.6. I to 4.6.9, imkwi.?e.Unfesa otherwise spectftedherefn, Mltests sballbe conducted under room conditions (23°C, 50 percent reia.tive hmnidity).

4. 6.1 Gemral exam fnation. -

4.6. 1.1 Tbe insulation sballbe examined toverffy that the materials, dimensions, labeling and work-manship are in strict conformance with this spectflcation. (See 3.2 through 3.4 and 3.6, and 3. 7.) Ea.cbsample filled container of type P selected fn accordance with 4. 3.2 shall be examined for defects of con-structionof tbe contafner and tbe closure, for evidence of leakage, for markings, and any other requirementsnot involving tests. Any defective contafner in the sample shall not be offered for delivery. U the munber ofdefective fiiled containers in the sample exceeds tbe acceptance number for tbe appropriate sample plan ofMIL-STD-105, tbissbtil because forrejection of thelotrepresented bythe sample.

4. 6.1.2 Metbodsfor measurement of dimensicms. -

4. 6.1.2.1 Wall thickness (Type T).- The wall tbicknessof thetubing sballbe determined fn accordancewith the method specified in ASTM D816. The inside dfameter, however, maybe determlnedby measurtngtbe dfametor tithe mandrel adjacent to the edge of the tubing specimen by use of achiselpobd micrometer.The fnside diameter, tbe outside diameter, a“dwalltbickness shall be mea.mreda.t a mininmm of 10 repre-sentativepobds along the lengthof the sample. At eacbpobd three measurements approximately 120 degreesapart sballbe made tithe outside diameter. The average inside dfameter and outside diameter sballbe re-ported, and the average wall thickness sballbe reported as one-bafftbe difference of the two averages.

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MfL-I-15265B(SHfPS)

4.6. 1.2.2 Width (type T).- Thewidth shllbedetermtied bytheuse tiast~&rd steel 8calegmdmtedtoreadfn l/16 inch. Thetub% shall depressed flat onasmooth sutiace atthetime M measurement. At

t ., least 10 measurements shall be made at representative pobds on the materfal, and the maximum, mfnimum,- . . a“d average values shall be recorded.

4. 6.1.3 ~.- Color of the insulation fnits applied form sballbe checked to determine compliancewith MfL-STD- 104.

4. 6.2 Dielectric stre n@h. -

4.6.2.1 Method of measurement. - ~electric stre@bshall redetermined inaccor&nce with themethod specified in ASTM D149. The Pwer SUPPlY shall consist of an alternating-current source havfngasnearly a true sine wave as possible at a frequency of 60 + 5 cycles per second. The application cd voltageshall be made using the short-time method with a rate o~rise of 1000 volts per second.

4. 6.2.2 Test electrodes. -

4. 6.2.2.1 Type P.- Afused coating of approximately O.030 inch thickness shaflbe applied to a copperbus bar l/4inch thick and4 inches wide. Three specimens shall be prepared. Oneendsball he sealed andImmersed toa depth of 4tnches tna 1 percent saltwater solution. Voltage sballbe applied hetween copperbarandthe saltwater. Breakdown sballoccur tbrough thecoatinS andnot the seal. Thevoltagepermilofthickness shall be determinedly dividing the breakdown volta.getbrough the coating by the thickness of thecoating. The actual thickness of coating shall he determined after breakdown and adjacent to the breakdownarea. TheaveWe dielectric bretidown evressed tivolts aswellas theavemge dielectric etre@htivolts per mil shall be reported.

4. 6.2.2.2 Type T.- Tubing shall reapplied by heat reaction tocopperhua bars. Three specimensshall be prepared for each size. One end of each specimen sballbe sealed and Immersed toa depth of 4inches fna lpercent salt water solution. Voltage shall be applied between copper bar and salt water solu-

●tion. Bretidown shall occur through thetubinsand not the seal. Thevoltage permifof thickness shall bedetermtied bydlvidiW the bre&down volt~ethrmgh thecoatiW bythetbicknes8 of thecmtti. Theavera.gethickness of the cOatfng shall be determined as spectfied fn 4.6.1.2.1.

4.6.3 insulation resistance.- Insulation resistance shall hedetermtned in accordance with the methodspecified in ASTM D257. The specimens used maybe the same ones as prepared for the dielectric strengthtests andmaybe tested prior tothe’ dielectric tests. Samples and immersion test fngsballbe under the sameconditional detiiled in 4.6.2 .2. land 4.6.2.2.2.

4.6.4 = - The effect of impact shall he determined by dropping a 5-1/2 pound cylindrical wefghtwith a 5/6 Inch hemispherical end from a height of 12 fnches onto an insulated bus bar. The thickness of in-sulation shall be O. 030 ~ .005 fnches. Three determimtions shall be made.

4.6.5 Abrasion resistance. - Abrasim wear (loss of weight) shall be determined fn accordance withmethod 1091.1 of FED-sT D-406. Three determinations shall be made. Cal fbrase wheels, CS- 10 with a loadof 1000 grams shall be wed. At least 5000 cycles shall be made.

4.6.6 Heat resistance, plastic flow. - A sample of maierial O. 100.~ 0.010 inch thick and not less t@nl-fncb wide shall be placed between the anvil and the special presser foot of a thtckness micrometer con-forming to that described in method 2021 of FED-STD-601. A 100-gram wefgbt shall be added to the 3-OunCewetght and after one minute initial thickness shall be read. The micrometer and the specimen under leadshall be placed in an oven for 30 minutes at 120 A O. 5°C. The final thickness shall be read withfn 30 secondsafter removal from the oven. Plastic flow to the nearest O.001 tnch shall be the difference between the fnitfal

-.. and final thickness measurements. Three determinations shall be made. In the case cd type T materfal thetest specimen for this test must consist of preshrunk rnaterlal and may consist of several plies fn order toachieve the require d thickness.

& 4.6.1 Acid resistance .- Acid resistance shall be determined in accordance with method 6211 of FED-STD-601. Specimens shall be immersed tn a 20 percent by weight sulphuric acid solution for 46 ~ 1/4 hoursat 70+ rc.—

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MfL-I-15266B(sfffPs)

4.6.8 Flame reststa.nce. - Flame resistance shall be determined in accordance with the methoddescrtbed tn United States Testing Company Report +63413. Specimens shall be O. 125 ~ .005 inch wallthickness build on 1/4 inch steel rock. 5-inch lengths shall be tested.

46.9 Toxicity when heated. - The methwf of test and sample size shall be the same as described forthe ffame resistance test (see 4.6. 8).

5. PffEPAfWTION FOR DELlVERY

5.1 Domestic shipment and early equipment installation. -

5. 1.1 Packagfmg. - packagtnq which may be the supplierqs Commercial practice, shall be sufficie”~ toafford adequate protection against corrosion, deterioration and physical damage durtng shipment from thesupply source to the usb?g activft y and WIt11early inebzllation.

5. 1.2 =.- Packing shall be accomplished in a manner which will tn.mre acceptmce by cmmmmcarrier at the lowest rate and will afford protection again8t physical or mechanical damage durfng directshipment from the supply source to the usfng activity for early installation. The shipptng containers ormethod of packing shall conform to the Uniform Freight Classification Ratings, Rules and Regulations m’other carrier regulations as applicable to the mode of transpmta.tton and may conform to thn eupplierscommercial practice.

5. 1.3 --- Shipment marking information shall be provided on interior packages and exteriorshipptng Containers in accOr&WICe with the Contractor’s commercial practice. The bdormation shall Includenomenclfdmre, Federal stink number or manufacturer’s part number, contract or order number, contractorsname and destination.

(5. 2 Domestic shipment and storage or overseas shipment. - The requirements and levels of packaging,packing and markti for Shipment shall be specEied by the procurfng activity (see 8. 2).

5.2. l.’Packaging. - Packaging shill be level A or C as specified (see 6. 3).

5. 2.1.1 m.-

5.2.1. L 1 =.- The insulation compound shall be furnished in l-gallon multiple friction PIUS typecans or in 5-gallon IUS cover steel paus as specified (see 6. 2).

5.2.1. L 1.1 ~.- Cans shall conform to type V, class 3, round, of PPP-c-96. Exterior plan Bcoating and side seam stripping shall be required. Cans shall be provided with wire bandies which shall begalvanized or protectively coated to resist corrosion.

5. 2.1.1.1.2 Pails. - The 5-gallon patls shall conform to tyle 11 of PPP-P-704. Wire bales shall bezinc-coated or otherwise protectively coated to resist corrosion.

5.2. L 1.2 T=. - Tbe insulation tubfng shall be furnished in lay flat coils of 100 foot lengths. Eachcoil shall be wrapped in 30-pound basis wefght (24 x 36-500) kraft gussetted bag, sealed with pressure semli-tive tape.

5.2. 1.2 =.- insulation shall be packaged in accordance with tbe suppliers commercial practice.

5.2.2 =.- Packing shall be level A, B, or C, as spectfied (see 6. 2).

5.2. 2.1 Levels A and B.-—

5. 2.2.1.1 Cans. - Cans shall be arranged and packaged for overseas shipment fn accordance with theappendtx tO ppp~6. cans packed in tiers still have a w 6 (pPP-B- 636) fiberboard pad placed betweenthe tiers.

5.2.2 .1.2 ~.- The 5-gallon Patls will require no additional packing. When specified (see 6.2) patlsshall be palletfzed in accordance with MfL-STD- 147.

5.2.2. i. 3 ~.- Coils shall ix packed in fiberboard boxes, class 2, III accordance with PPP-B-636.

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●MIL-I-15265B(SHIPS)

5.2.2.2 --- .Jnsulation shall be packed fn a manner which wiU insure carrter accePt~ce and s~edelivery at destination. Shippfng containers or method of packtng shall comply with the Untform FreightCfaeatfication Rules and Regulations or other carrier regulations as applicable to the mode of transportation...: .

5.2.3 ~.- In addition to any specbd marking required by the contract m’ order, tnterior packagesand exterior sbfpptng containers and pallettzed unit loads shall be marked in accordance with MfL-STD- 129.

5.2.2.1 Hazardous chemicals. - All packages containing hazardous chemicals (see 3.6) shall have se-curely aff txed thereto such warning labels and marktngs as required by the Interstate Commerce CommissionCFR Title 49, part 71-16 and tbe Mamdacturfng Chemists Association Manual L-1. )

6. NCYTES

6.1 fntended use. - This insulation is bdended for covering hus bars, primarily on submarines, where aflame resistint, tough, non-porous, good dielectric coverfng is needed. Tbe tpe P material provides a buildof approximately 0.050 to 0.060 fnches and the type T material provides a wall thickness after reaction ofapproximately 0.030 to 0.035 fnches. Thi8 insulation shall not be used in applications where tbe continuousoperatfng hot spot temperature exceeds 105”C. (221”F. k any shot time, higher temperahme and for the timecycle involved before use. fnstruct ions for applying these materfals to submarine battery bus bars and con-nectors is contafned in tbe appendix to this spec tfication.

6.2 Ordertng data. - Procurement documents sbmdd spectiy the followbw

(a) Title, number, and date of this specification.(h) Twe requtred (see 1. 2).(c) Size for type T (see 3.4. 2).(d) Quantity of compound required (see 5.2.1.1. 1).(e) Palletfzed patls, if required (see 5.1.1. 2).(f) P~~fns, packing or marking req.frements other than those required by paragraph 5.1 (see

● ““6.3 With respect to products requirtng qualification, awards will be made only for products which are atthe time set for openfng of bids, quaiff ied for fnclusion in Qualtf ied Products List QPLM. Tbe attentionof the eupplters is called to this requirement, and manufacturers are urged to arrange to have the productsthat they propose to offer to tbe Federal Government tested for qualification, tn order that they may be eli-gfble to he awarded contracts or orders for the products covered hy this specification. Tbe activity respon-sible for tbe qual!iied products list is tbe Naval Ship Engineering Center, Department of the Navy, Washington25, D. C. 20360, ‘and information pertaining to qualification of products maybe obtained from that activity.Application for Qualtficatfon tests shall be made fn accordance with “Provisions Governing Qualification”(see 6. 4).

6.4 Copies of ‘,Provisions Governtng Qualfficaticuf% may be obtafned upon application to CommandingOfficer, Naval Supply. Depot, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120.

6.5 Certatn provisions of this specification are tbe subject of international agreements (ABC-NAVY-STD- 17). When amendment, rev fsion or cancellation of this spec Ification is proposed, the departmentalcustodians will bdorm thetr respective Departmental Standardization Off ices so that appropriate action maybe taken respecting the fnternaticma.1 agreement concerned.

6.6 CHANGES FROM PREvfous~i3uE. THS EXTENT OF CHANGES(DELET10N2,.4DDITIONS,ETC. ) PRECLUDE THE ANNOTATION OF THE lNDfVIDUAL CHANGES FROM THE PREVIOUS fSSUE OFTfffS DOCUMENT.

I.. iPreparing activitr

international interest (see section 6).Navy - SH(Project 5970-N065Sh)

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MIL-I-15265B(SHfPS)

APPEfiDfX

-1.< APPLICATION iNSTRUCTIONS (SUBfvfARfNE BUS BARS)

10. SCOPE

*.

10.1 This appendti covers fnst ructions” for applytns plastic tns.lation to submarine bus bars and inter-cell connections.

20. APPLICABLE DOCUMENTS

20..1 The followtng documents,. of the issue in effect on date of invitation for bids or request for pro-posal, form i part of this specification tO the extent specff ied ~ere~

SPECIFICATIONS

( FEDERALo-T-634 - Trichloroethylene, Technical.P-D-660 - Dry Cleaning Solvent.

DRAWGSGS

BUREAU OF SHIPS9000 -s6202 -73980 - Electric Plant fnsta.llations, 3tandard Methods, Section 5- Submarines.

(Copies of specifications, standards, drawings, and publications required by suppliers in connection withspecific procurement functions should be obtatned from the procuring activity or as directed by tbe codract-tng officer. )

30. RRQUDZEMENTS

30.1 Surface preparation. - It is most important to remove all sharp edges, burrs and sharp projectionson bus bar, terminal posts, bolts and nuts with a file and sandpaper or crocus cloth, removfng the minimumamomt of metal. Renew all damaged nuts and bolts. AU bolts must be of the same length.

30.2 Clean fng. - Place bus bars tn a vapor degreaser and clean. Solvent used fn cleaning operationshould cons~ parts of dry cleaning solvent in accordance with P-D-680 (Stoddard Solvent) and 1 Part -trichloroetbylene tn accordance with o-T-634. After cleantng, all bus bars should be handled only withclean cotton gloves. Any oil or grease on surfaces to be fnsulated will result !-nfail”re of tbecoatfngto ad-here.

30.3 Parts to he insulated. - The center Portion of tbe cell connectors shall be fnsulated with type P ort~e T material. AU rematntng exposed parts of cell connectors, terminal posts, bolts, washers, and se-curing nut8 are to be insulated with slip-on caps using tyle P materiai.

30.3.1 C~~ectors, bus bar section. -

30.3. 1.1 Marking tbe center portion. - Handlfns the cleaned bus bar cell connector with clean cottongloves, mark off 2 to 2-1/16 tncbes from each end.

30.3. 1.2 Primer for type P.- Apply an adhesive primer to the central portion of the bus bars and allowto air dry at room temperature for 20 mtnutes.

30.3. 1.3 &@@ng t~e P.- Suspend the primed bus bar ti an oven preheated to 190”c. (375”F. ) andbeat for about 15 minutes or until the part has attafned oven temperature. Prolonged beatfng or heattng attoo high a temperature may destroy the primer. Remove tbe heated bar and dip quickly into tbe type P com-pound to within 2 fncbes of the upper end of the bar. Keep the bar Immersed for 30 seconds, withdraw slowlyand return Immedta.tely to a preheated oven. Bake for 12 mfnutes at 190’C. (375-F. ) to fuse the dipped cuat-ing. A change fn color and slfgbt ‘,smokf@ of the coating also tndicates complete fusing. Remove from tbeoven and bang the bar up untU cool. Tme P coatfng should be about O. 60 to O. 70 fnch thick. Cut throughthe coatfng, 2 to 2-1/16 tnch from each end and strip off tbe excess resin. Pill box hole.e ebould be re-opened.

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MfL-1- 15265B(sH1Ps)

30.3.1.4 Applying type T.- Cut a length of the required size of type T materfal and slip over the centerportion of the clean bus bar. Place b an oven and heat for 30 minutes at 150”C. (307F. ) or mtU contractbmhas occurred. The type T C?atfng should be about 0.030 to 0.35 inch thick. A second tube shall be applied inthe same manner until a wall thickness of about O. 60 to 0.70 inch ttdck & obtafned. Cut through the coattngs, -#2 to 2-1/16 tnch from each end and slip off the excess tubfng. Extreme care shcmld be exercised in c“ttfng

,,.

and trfmmfng the tubfng to the desired length on the bus bar. Utilize a sharp knffe or blade and cut the tubtngin smooth continuous strokes. Avoid irregular cuts or nicks when trimming the edges and faces of the busbars. Position tubing so that bolting, cfampfng, or other forces do not pfncb, cut or similarly stress tubfng.

*.

30. 3.2 Cell connectors, slip-on caps. -

30.3.2.1 --- Tbe mold for tbe Blip-On caps should be made from a free-machbdng low carbonsteel (such as SAE - 1020) fn such form and dimensions to produce caps in accordance with 9000 -S6203 -73960,aectton 5, sheets 141 and 152.

30.3.2.2 Applyirg tyle P.- The molds should be lightly coated with a mold release agent, heated to190’c. (375”F. ), removed from the oven and while hot dipped quickly bdo type P compound. Keep the moldimmersed for a timed period of 30 seconds, withdraw slowly and return to a preheated oven. Bake for 10 to15 minutes at 19CPC. (375”F. ) or until the coating is completely fused.

30.3.2.3 Removal of cap. - Remove mold and cap from oven and cml by Immersing tn water. With asharp knife cut the plastleol fmm what is tbe bottom of tbe sllp-on cap. The bcdtom will be m opposite edgmof the mold for each bati of tbe total number of slip-on caps. Remove cap from mold by bnmedng the partover tbe bolt heads first.

40. QUALfTY ASSURANCE PROVL91ONS

40.1 Responsibility for inspection. - UnleSS otherwise 8pecIfied in tbe contract or purchase order, tbesupplier is responsible for the performance of all kwpection requirements as specified herefn. Except asotherwise epecff ied, tbe supplier may utili2e bis own facilities or any commercial laboratory acceptable tothe Government. The. Government reserves the right to perform any of the inspections set forth fn tbe speci-fication where such inspections are deemed necessary to aesure supplies a“d services conform to prescribed ●requirements.

M. 2 insulation suitability tests .- Insulation suitability y tests shall be conducted on in.mlated bw barand slip-on caps. Samplin3 shall be In &CCOr&inCewith table Ill with a lot size befng the number of bus barsor caps. The tests shail Constst of the quality Conformance tests listed in table W. As the dielectricstrergtb tests are destructive, samples fOr teSt shall be over and beyond what is needed for a specific appli-cation. For the dielectric test the bus bar end shall be cut off and sealed before immersion and tbe slip-oncap shall be filled with lead shot and immersed on the dkigoml so as to cover at least one bolt head portkmOf the Cap.

50. PREPARATION FOR DELfVERY

50.1 Preparation for deiivery shall be as specified by tbe procuring activity.

60. NOTES

60.1 Thfs section is not applicable to this specification.

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Documents

MIL-I-15265B(X-RPS) MfL-I-15265A(SHfPS) …everyspec.com/MIL-SPECS/MIL-SPECS-MIL-I/download.php?spec=MI… · i, mflitary specification.*.. djsulation, electrical, plastic mil-i-15265b(x-rps)