NOTE: DOD-STD-2183 has been redesignated as a Test Method

NOTE: DOD-STD-2183 has been redesignated as a Test Method Standard. The coverpage has been changed for Administrative reasons. There are no other changesto this Document.

DOD-STD-2183 (SH) 5 MARCH 1985 SUPERSEDING MIL-B-22852 (SHIPS) 17 MARCH 1961

AMSC N/A FSC 3120

DISTRIBUTION STATEMENT A. Approved for public release; distribution isunlimited.

DEPARTMENT OF DEFENSETEST METHOD

BOND TESTING, BABBITT-LINED BEARINGS

Downloaded from http://www.everyspec.com

DOD-STD-2183(SH)5 March 1985

DEPARTMENT OF THE NAVYNAVAL SEA SYSTEMS COMMAND

Washington, DC 20362-5101

Bond Testing, Babbitt-Lined Bearings.

DOD-STO-2183(SH)

1. This Military Standard is approved for use by the Naval Sea SystemsCommand, Department of the Navy, and is available for use by all Departmentsand Agencies of the Department of Defense.

2. Beneficial comments (recommendat ions, additions , deletions) and anypertinent data which may be of use in improving this document should beaddressed to: Commander, Naval Sea Systems Command, SEA 5523, Department ofthe Navy, Washington, DC 20362-5101 by using the self-addressed StandardizationDocument Improvement Proposal (DD Form 1426) appearing at the end of thisdocument or by letter.

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DOD-STO-2183(SH)S March 1985

FOREWORD

1. This standard is intended to be used to provide requirements for bondtesting and to define the quality of bond required for steel end bronzebacked babbitt-lined bearings frequently used in shipboard ❑achinery, suchas turbines, gears, pumps, fens, lineshaft, journal end thrust bearings.

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Paragraph 1.1.1

2.2.12.2

3.

. ! + .4 . 14.2k.36.44.4.1.4.56.5.14.6

5.5.15.25.35.3.15.3.25.45.4.15.4.1.15.4.1 .1.15.4.1 .1.25.4. 1.25.4.1.35.4.1 .3.15.L.I.3.25.4. 1.3.35.4.1 .3.45.4.25.4.2.15.4.2.25.4.2.35.4.2.45.4.35.4.3.15.5


CONTSNTS@

SCOPE ------------------------------------------Scope -----------------------------------------

REFERENCED DOCUMENTS ---------------------------

Issues of documents ---------------------------Other publications ----------------------------

DEFINITIONS ---------- ------. ---------.--------.

GENERAL REQUIREMENTS ---------------------------Material --------------------------------------Design -------------- -------.---- -------- ------

Bond extent -----------------------------------Bond strength ---------------------------------Bond strength determination ----------- --------

Bond ductility --------------------------------Evaluation of bond ductility ------------------

Quality assurance provisions ------------------

DETAILED REQUIREMENTS -------.---- --------------

Test equipment and inspect ion facilities ------Material inspections --------------------------

Sampling for tests ----------------------------

Sample bear ings ----------- -----.----------.---

Rebabbitted bearings --------------------------

Tests ----------.---- ------------ ------..----.-

Ultrasonic bond extent ❑easurement ------------

Equipment ------.---- -.---------- ...---..----.-

Demonstration of instrument suitability -------

Calibration standard for unbend ---------------Bond examination ------------------------------Bond acceptance criteria -------- --------------

Requirements for Zone A -----------------------Requirements for Zone C -----------------------Exclusions for Zone B -------------------.-----

Bearing acceptance ----------------------------Chalmers bond test ----------------------------Specimen location selection -------------------Specimen preparation and test -----------------Specimen post-test examination ----------------

Acceptance criteria -------- -------------------Chisel test -----------------------------------Cbisal test acceptance criteria ---------------

Rejection -------------------------------------

11

111

1

222222222

2233344444555666666677778

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I

Figure 1.2.

3.

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Table I.

4.5.

IParagraph 10.

10.1


CONTSNTS - Cent inued

FIGURSSg

Reference test blocks ------------------- ------- 9Patterns of pulse sonic reflections of unbendedspecimen -------------------------------------- 10Patterns of pulse sonic reflections of bondedspecimen -------------------------------------- 10Zones A and C of sample besring surface -------- 11Cha linersbond test method --------------- ------- 12

TABLS

Sampling for tests ----------------------------- k

APPENDIX

DATA RSQUIRSMSNTS ------------------------------ 13Data requirements ----------------------------- 13

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1. SCOPE

1.1 -. This standard provides thenondestructive ❑etallurgical bond testing of

2. REFERENCED DOCUNENTS

requirements for destructive andbabbitt-lined bearings.

2.1 Issues of documents. The following documents of the issue in effecton date of invitation for bids or request for proposal, form a part of thisstandard to the extent specified herein.

SPECIFICATIONS

FEDERALQQ-T-390 -

STANDARDS

NILITARYMIL-STO-1O5 -

MIL-STD-271 -MIL-STD-45662 -

(Copies of specificationstion with specific acquisitionactivity or as directed by the

Tin Al10Y Ingots and Castings and Lead AlloyIngots and Castings (Antifriction Metel) forBearing Applications.

Sampling Procedures and Tables for Inspection byAttributes.

Nondestructive Test ing Requirements for Metals.Calibration Systems Requirements.

and standards required by contractors in corurec-functions should be obtained from the contractingcontracting off icer.)

2.2 Other publications The following docament forms a part of thisstandard to the extent specified herein. Unless otherwise indicated, theiesue in effect on date of invitation for”bids or request for proposal shallapply.

ANERICAN SOCIETY FOR TESTING AND MATSRIALS (ASTM)B 23 - White Metal Bearing Alloys.

(Application for copies should be addressed to the American Society forTesting and Materials, 1916 Race Street, Philadelphia, PA 19103. )

(Technical society and technical association specifications and standardsare generally available for reference from libraries. They are also distri-buted among technical groups and usiag Federal agencies. )

3. DEFINITIONS

Not applicable.

1


DOD-STD-2183[SH)5 March 1985

GENESAL REQUIREMENTS4.

6 . 1 Material. The sntifriction material to which the bond testingspecified herein applies shall be grade 2 or 3 babbitt ❑eeting the requirements ●of QQ-T-390 or ASTM B 23. The babbitt and shell or backin~ material shall bethe same as the production or repair bearings (i.e. , steel-or brass/bronze)required to ❑eet this standard.

k.2 -. The baaring design shall be either journsl or thrust andshall have a plain cylindrical, tilting pad, flat washer or tspered landconfiguration.

4.3 Bond extent. The extent of the bonded srea determined ultrasonicallyas specified in 5.6.1 shall be as specified therein.

4.4 Bond strength. The minimum ❑ean bond strength, when ❑easured asspecified in S.4.2, shall be as specified therein for the respective material.

4..4.1 Bond strength determination. The results of the ultrasonic inspec-tion shsll be used to select areas for bond strength determination. Chalmerstest samples shall be taken in areas shown as unbended or of questionable bond.

4.5 Bond ductility. Bond ductility shall be evaluated both from inspec-tion of the Chalmers test samples after completion of that test as specifiedin 5.4.2 and by means of a chisel test as specified in 5.4.3 (a brittle bondwill part at the babbitt -backing material interface while a ductile bond willpart in the babbitt some distance from the interface) .

4.5.1 Evaluation of bond ductility. Some evidence of a brittle bond fromthe inspection of a Chalmers test specimen is permissible within the limits ●specified in 5.4.2. The bond shall be ductile over the entire bond area whenevaluated by the chisel test as specified in 5.4.3.

4.6 Qua 1ity assurance provisions. The contractor is responsible for theperformance of a l l inspection requirements as specified herein. Except asotherwise specified, the contractor ❑ay utilize his own or any other inspectionfacilities and services acceptable to the Government. Inspection records of theexamination end tests shall be kept complete and available to the Governmentas specified in the contract or order. The Government reserves the right toperform any of the inspections set forth in this standard where such inspectionsare deemed necessary to assure supplies and services confotm to prescribedrequirements.

5. DETAILSD REQUIREMENTS

5.1 Test equiPment and inspection facilities. Test and measuring aq”ip -mant and inspection facilities of sufficiant accuracy, quality, and quantity top e r m i t porformence of the required inspection shall be established end ❑ain-tainad by the babbitting activity. The establishment end ❑aintenance of acal ibrat ion system to centro1 the accuracy o f the measuring and test equipmentshall bc in accordance with HIL-STD-45662.

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5.2 Material inspections. Material composition inspections shall consistof certification (see appendix) supported by verifying dsta that the materialsused in fabricating the bebbitt-lined bearings are in accordance with theapplicable referenced specifications prior to such fabrication.

5.3 Sampling for tests. Sampling for tests shall be in accordance withMIL-STD- 105, except as modified in 5.3.1. Backing ❑sterial of sample bearingshall have the s=e composit ion, wall thickness and radius of curvature as tbeshells of the bearings being supplied. Backing ❑aterial of sample bearingshall be cleaned snd prepared for babbitting together with the shells ofbearings to be supplied and by exactly the ssme method. Babbitt from the ssmeheat shal 1 be used for both the ssmple bearing and the bearings to be supplied.The babbitt thickness cast in the asmple bearing shall be at least as greatas that cast in the bearings to be supplied snd allow the ❑inimum babbittthickness after finishing the surface to be not less thsn 4 millimeters (mm)

I (O.150 inch) . The sampl~ bearings shall have the ssme length as the bearingsbein~ surxrlied for iournal bearin~s ur!to 100 mm (4 inches) in dismeter. Forlarg& j&nal bear~nga, the leng;h o> the aarsple‘bearing ihall be limited to100 mm (4 inches) or 20 percent of the bearing inside diameter whichever islarger. Journal bearing ssmples shall consist of two half shells. Thrust bearingsamples shall consist of flat plates whose inside snd outside diameters areequal to those of the tapered lsnd bearings or plain thrust washers being supplied.For tilting pad thrust bearings, ssmple bearings shall have the asme babbittsurface dimensions as a single thrust shoe of the bearings being supplied.

5.3.1 Sample bearings. Luts of new journal bearings and new thrustbearings shall be sampled in accordance with table 1. Samples from the firstlot of new bearings shipped from a specific manufacturer in each calendar yearshall be tested by the test ❑ethods of 5.4.1, 5.4.2, snd 5.4.3. Records ofthese tests shall be maintained by the ❑anufacturer to serva aa a referencefor inspection of subsequent shipments. Subsequent shipments in the samecalendar year may be tested by nondestructive testing (NDT) only by the ❑ethodof 5.4.1. New journal bearings larger than 200 mm (8 inches) in dismeter ❑ayhave the ultrasonic test (see 5.4. 1) conducted on a bearing to be eupplied,snd the destructive teats (ace 5.4.2 snd 5.4.3) conducted on a separately caatsample. The separately cast sample does not need to be finish machined, butthe babbitt thickness shall be sufficient to allow for a finished thickness ofnot less than 4 mm (O.150 inches) . Alternatively for such large journalbearings, the destructive tests ❑ay be conducted on a sample which is caat andmachined as an integral part of a bearing to be supplied snd then cut from oneend to achieve the correct length in the bearing to be supplied. The babbittin the ssmple shall be sufficiently great to allow a finished thiclrneas of atleast 4 mm (O.150 inches) and the ssmple shall be long enough to provide thearea required for the sight specimen locations specified in 5.4.2 snd the fouredge cuts specified in 5.4.3.

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TABLS I. Sampling for tests.

Number of bearings Number of samplesin lot required

1-49 150-99 2100-299 3300-399 4400 and over 5

5.3.2 Rebabbitted bearings. Rebabbitted bearings shipped by a babbittingactivity which has conducted the necessary tests in accordance with 5.4.1, 5.4.2, “and 5.4.3, on a shipment or lot of new bearings in that calendar year ad has arecord of the test data ❑ay test the rebabhitted bearings in accordance wi~h the❑ethod of 5 .4.1 only. If destructive test data is not on file, it shall beobtained on a sample cast together with the rebabbitted bearing.

5.4 ~. The tests for bond are as follows:

(a) Ultrasonic test (see 5.4. 1) for bond extent measurement.(b) Chalmers test (see 5 .4.2) for bond strength measurement and

bond ductility evaluation.(c) Chisel test (see 5.4.3) for bond ductility evaluation.

These tests shall be performed in the order given. The test of 5.4.1 shall bemade over the entire babbitt surface and the acceptance criteria of 5 .4.1.3shall be applied. The chalmers bond tests of 5.4.2 shall be applied at eightlocations on the sample bearing.

●The eight locations shall be selected after

a review of the findings of 5.4.1. The acceptance criteria of 5.4.2.4 shallbe applied. Chisel tests (see 5.4.3) shall be applied at four locationsselected to avoid the holes ❑ade by the chalmers bond tests . The acceptancecriteria of 5.4.3. 1 shall be applied to the results of the chisel tests .

5 .4.1 Ultrasonic bond extent ❑easurement. The extent of the bond betweenthe babbitt and the backing ❑etal of the sample bearings shall be determined bythe use of ultrasonic ❑ethods. Persomel and procedure qualifications shall bein accordance with MIL-STD-271. A detailed written ultrasonic inspectionprocedure and test report shall be prepared (see appendix)

5.4.1.1 Equipment. A pulse-echo “A” scan instrument shall be used. Thetransducer shall be a single or dual element and produce a compression waveof 4 to 10 ❑egahertz. The transducer shall have a diameter to suit the bearingwithout loss of contact. The transducer may be equipped with delays having acurvature which ❑atches that of the bearing being inspected to maintainadequate contact. A couplant shall be used and ❑ay be either oil, glycerine,water, or a synthetic couplant with suitable coupling properties.

5 .4.1.1.1 Demonstration of instrument suitability. Suitability of theequipment shall be demo~strated by the use of a reference block. such as theo~es- shown on figure 1. The unbo;ded areas in the reference block shall be asshown on figure 1, but the babbitt and backing ❑aterial thicknesses may beother than as shown in order to ❑ore closely represent the babbitt and shellthicknesses of the sample bearing to be tested, or the block may incorporate ●

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DOD-STO-2183(SH)5 March 1985

stepped regions with different babbitt thicknesses. Each unbended ares of thereference block is made by painting the area of the backing ❑aterial withcolloidal graphite in water follnwed by baking at 120° C (250eF) befOrebabbitting.

5.4.1 .1.2 Calibration atsndard for unbend. The standard used to calibratethe ultrasonic instrument for detection of unbended areas shall be a strip ofclean babbitt without backing ❑aterial. The strip of babbitt shall have thesame thickness as the babbitt in the sample bearing to be inspected, withinplus or ❑inus 20 percent or plus or ❑inus 1.5 mm (1/16 inch), whichever issmaller. For thrust bearing or thrust shoe inspections, the strip of babbittshall be flat. For journal bearing inspection, the strip of babbitt shallhave a curvature with a radius equal to the rsdius of curvature of the bearingto be inspected witbin plus or ❑inus 10 percent and the transducer shall beequipped with the delsy used for the bearing inspection.

5 .4.1.2 Bond examination. Prior to each sample bearing inspection, thesuitability of the equipment (see 5.4.1. 1) shall be demonstrated with areference block (see 5.4.1.1. 1) by ❑apping the bonded and unbended areas ofthe block by using the patterns of pulse reflection. Typical patterns are shownon figures 2 and 3. After demonstrating the suitability of the equipment byverifying that the detected areas of bond and unbend ❑atch the known suchareas in the block, the same equipment shall be used to test the asmple bearing.The calibration standard (see 5.4.1. 1.2) that is within plus or minus 1.5 mm(1/16 inch) of the babbitt thickneaa in the sample bearing shall be used toestablish the cathode ray tube (CRT) presentation of unbend for the samplebearing. After establishing the unbend signal on the standard, the surface ofthe babbitt to be tested sbal 1 be scanned using a continuous scanning patternwith successive trsnaducer passes. Each successive pass shall overlap theprevious paaa by at leaat 20 percent of the transducer diameter. Unbend areason the face of the bearing shall be ❑appeal. The equipment ca1ibration ❑ade priorto the inspection shall be checked using the calibration standard at least onceper 8 hour shift and at completion of testing. If a check shows the amplitude ofthe IF pulse (see figure 2) at the same equipment settings to have changed by 20percent or ❑ore from its amplitude during the preinspection calibration, all ❑ap-ping conducted since the previous satisfactory calibration check shall be redone.

5.4.1.3 Bond acceptance criteria. Bearings shall he divided into threezonea designated Zone A, Zone B, and Zone C (see figure 4) as follcxos:

(a) Zone A, for journal bearings, is defined as the periphery whosewidth is 10 percent of bearing lsngth. (A total of 20 percentwhen both ends are taken into account. ) Zone A for thrustshoes is defined as tbe 10 percent peripheral area of eecbshoe baaed on the ‘nominal thrust shoe outside dismet er (od),not to axceed 25 mm (1 inch) in width. (For example, a thrustshoe with en od of 150 mm (6 inches) will have a Zone A widthof 15 mm (0.6 inch)).

(b) Zone B for journal bearings ia defined as all babbitt areaslocated over anchoring dovet ai1 grnnves or in areas receaaedbelow the nominal bearing bore such as oil pockets, channels,feed or drain grooves, or configurations for producinghydrodynamic loading such sa oil dams. Also, all areas located

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(c)

5.4.1 .3.1follows:

(a)

(b)

(c)

5.4.1 .3.2follnws:

(a)

(b)


in the nominally unloaded half of unidirectionally loadedbearings (such as line-shaft bearings) . Zme B for thrust ●shoes is defined as all bsbbitt sreas over anchoring groovesor holes in the shoes or pads.Zone C is s1l the area not in Zones A or B.

Requirements for Zone A. Requirements

Total unbended area shall not axceed 15Zone A.

No individual ares of unbend shall havemeater than 12.5 mm [0.5 inch) .

for Zone A shall be as

percent of the area of

a ❑ajor dimension

A;jacent individual areas of unbend of any size ❑ust be fartherthan 50 mm (2 inches) spart.

Requirements for Zone C. Requirements for Zone C shall be as

Total unbended area shall not exceed 15 percent of the totalbabbitted area of the bearing.No individual area of unbend shall be larger than 3 percent oftbe total babbitted area of the bearing or 650 square mm (1square inch) whichever is smaller.

5.4. 1.3.3 Exclusions for Zone B. Zone B is excluded from ultrasonicinspect ion. ●

5 .4.1.3.4 Bearing acceptance. Sample bearing aad the lot which it repre-sents shall be rejected unless it ❑eets all the requirements of 5.4. 1.3.1 and5.4.1.3.2.

5.4.2 Chalmers bond test. The strength of the bond between the babbitt andbacking ❑aterial shall be determined by the chalmers method in which an annulararea of bond is isolated and forced off the bearing shell as shown on figure 5.This ❑ethod is applicable to babbitt thicknesses greater than 4 mm (O.15 inch) .

5 .4.2.1 Specimen location selection. The chalmers bond test shall be ❑adeafter the ultrasonic bond extent has been determined. Eight locations on thesample bearings shall be selected, equally spaced, four in Zone A and four inZone C. If unbended or doubtful areaa have been ❑appeal in accordance with5.4. 1.2 in either Zone A or C, bond tests shall be located to include or bewithin the suspect areas. Investigation of suspicious areas shall take prece-dence over the requirement for equal spacing of test locations.

5 .4.2.2 Specimen preparation and test. The annular area of bond isisolated by drilling through tbe babbitt with a trepaming drill (od = d3,inside diameter (id) = dz = 9 mm (0.350 inch)) and drilling a coaxial hole mthe backing ❑aterial wit,, a flat-ended drill (od = dl = 6 mm (0.250 inch)) .The holes shall be concentric within 0.05 mm (0.002 .nch) The babbitt plug isthen forced off tbe backing material. The rod used to force the plug off shallbe at least 0.05 mm (0.002 inch) less in diameter than dl. The force inkilograma required to push the plug from the shell is me.sured by electricstrain gauge, ❑echanical, pneumatic, or hydraulic piston force ❑easuring systems. ●

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The rate of load application shall be 9strength is calculated by dividing thisthe hole in the babbitt and the hole in

mm (0.350 inch) per minute. The bondforce by the area of the annulua betweenthe backing ❑aterial as follows :

s=

Where: S =F=d2 =dl =

In the event that

4F/(m(dZ2 - dlz))

bond strength, megapascalarupture force, newtonsid of trepaming drill, mmod of flat-end drill, mm

a babbitt plug falls off during tbe preparation of the eightspecimens, it shall be included in the computation of average bond strength,with a value of zero as the bond strength of that specimen. The average valueof the eight specimens shall be computed.

5 .4.2.3 Specimen post -test examination. Babbitt plugs forced off inthe Chalmers test shall be examined and rated as exhibiting either a brittle orductile bond. Bonds showing presence of backing ❑achining ❑arks shall be ratedas brittle bonds .

5.4.2.4 Acceptance criteria. The sample bear ing shal 1 meet both of thefollowing acceptance criteria:

(a) The average bond strength as determined by 5.4.2.2 exceeds 55

(b)

megapascals (8,000 pounds per square inch) for steel-backedand 35 ❑egapascala (5,000 pounds per square inch) for bronze-backed sample bearings.Not ❑ore than two of the eight babbitt plugs exhibit brittlebonds when examined and rated in accordance with 5.4.2.3.

5.4.3 Chisel test. Following the successful completion of the teats of5.4.1 and 5.4.2, a chisel test shall be applied to the sample to check for theprasence of a brittle bond. A ❑achinist cold chisel, 13 to 19 mm (1/2 tO 3/4inch) wide with a 30 to 60 degree included angle cutting edge, shall be placedwith the cutting edge parallel to the bond line and slightly above the bondline. Repeated bsmmer blows shall then be applied to the chisel to peel backthe babbitt bonded onto the base ❑atal. The angle of the chisel shall beadjusted to carry it to the bond line without actually cutting into the backingmaterial. Cuts shall be extended to the center of tbe bearing surface. Cutsshall be pieced to avoid going through chalmer bond test trepanned areas. Fourcuts, one from each edge of the bearing surface, shall be made.

5.4.3.1 Chisel test acceptance criteria. The bond shall be deemedacceptable if separation is above the bond line and if the ribbon of babbittis not ❑ore than 13 mm (1/2 inch) greater in width than the width of the chisel,in all of the four test areas.

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5.5 Rejection. The failure of any sample to pass the tests specified in5.4 shall cause the lot represented thereby to be rejected. ●

Preparing activity:Navy - SH(Project 3120 -N637)

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II UNBONDED

I

mld

—

1s0mm(0In.)—

w. . .

q.

UNBONDED

AREA

-H-TEST BLOCK B &w~

BABBll_r

\

I 2 5 mm(1 In.)

T20 mm(2In.)

1

1.8Iwnf% h.)-

SH 131365FIGURS 1. Reference test blocke.

BACKINGMATERIAL

/

BACKINGMATERIAL

●

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MULTIPLES

NDED

OF INTERFACE

DUA

SPECIMEN

1P If

SH 131363FIGURS 2.

JF

Patterns of pulse sonic reflectionsof unbended spec$nen.

SINGLE DUAL

~BONDE13SfJ,C,MEN~e

1P IF BR IF BR

IP=INITIAL PULSE

IF= IFJTERFACE {BEWEEN BABBITT AND BEARING)BR=BACK REFLECTION (FROM BACK SURFACE OF BEARINGONLY WHEN SURFACES ARE PARALLEL)

SH 131366FIGIJM 3. Patterns of wise sonic reflections

of bonded svecimn.

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I IID 1

r r —.— ——— —.1

I II I

L I II ZONE C 1 — O.1OL

I I

I I

1- 1- ——. ——— —— 1ZONE A

JOURNAL BEARING

O.low

SH 131366FIGURS 4. 2oaes Aand Cofs emple bearing surface.



f

I SH 131367

FIGURE 5. Chalmers bond test ❑ethod.

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APPENDIX

10. DATA RSQUIRSNSNTS

10.1 Data requirements. When this standsrd is used in an acquisitionwhich incorporates a DD Form 1423, Contrsct Data Requirements List (CDRL), thedata requirements identified below shsll be developed as specified by anapproved Dst8 Item Description (DD Form 1664) and delivered in accordance withthe approved CDRL incorporated into the contract. When the prov isions of FAR52.227-7031 are invoked and tbe DD Form 1423 is not used, the data specifiedbelow shall be delivered by the contractor in accordance with the contrsct orpurchase order requirements . Deliverable data required by this standard iscited in the following paragraphs.

Paragraph no. Data requirement title Applicable DID no. !%@?!!

5.2 Certification data/report UDI-A-23264 ----

5.4.1 Procedures, test UDI-T-23732 ----

5.4.1 Reports , manufacturer’s UDI-T-23797 ----

test

,

(Data itsm descriptions related to this standard will be approved andlisted ss such in DoD 5000. 19L. , Vol. II, AMSDL. Copies of dats item descrip-tion required by the contractors in connection with specific acquisitionfunctions should be obtained from the Naval Publications and Forms Center or ssdirected by the contracting officer. )

10.2 The data requirements of 10.1 and any task in sections 4 or 5 ofthis standard required “to be performed to ❑eet a data requirement mey be waivedby the contracting/acquisition activity upon certification by the offeror thetidentical data were submitted by the offeror snd accepted by the Governmentunder a previous contract for identical item acquired to this stsndard. Thiedoes not apply to specific data which may be required for each contract regard-less of whether an identical item has been supplied previous lY (for example,test reports)

13


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Documents

NOTE: DOD-STD-2183 has been redesignated as a Test Method