1、Designation: B687 99 (Reapproved 2016)Standard Specification forBrass, Copper, and Chromium-Plated Pipe Nipples1This standard is issued under the fixed designation B687; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification establishes t
3、he requirements for brassand copper pipe nipples in standard pipe sizes from18 to 8 in.,inclusive, in standard lengths, and chromium-plated pipenipples in standard pipe sizes from18 to 2 in., inclusive, instandard lengths.1.1.1 Chromium-plated pipe nipples ordered under thisspecification are intende
4、d for interior use in decorative appli-cations.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to
5、address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B42 Specif
6、ication for Seamless Copper Pipe, Standard SizesB43 Specification for Seamless Red Brass Pipe, StandardSizesB456 Specification for Electrodeposited Coatings of CopperPlus Nickel Plus Chromium and Nickel Plus ChromiumB846 Terminology for Copper and Copper AlloysE29 Practice for Using Significant Digi
7、ts in Test Data toDetermine Conformance with Specifications2.2 ANSI/ASME Standard:B1.20.1 Pipe Threads, General Purpose (Inch)32.3 Military Standard:MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes43. Terminology3.1 Definitions:3.1.1 For definitions of terms relating to coppe
8、r and copperalloys, refer to Terminology B846.4. Ordering Information4.1 Contracts and purchase orders for product under thisspecification are to contain the following information:4.1.1 ASTM specification designation and year of issue,4.1.2 Type of material (Section 5),4.1.3 Weight of material; regu
9、lar or extra strong,4.1.4 Diameter; nominal or actual outside diameter,4.1.5 Length; standard or special (8.2 andTable 2), and4.1.6 Quantity; number of pieces or total weight of eachmaterial and size.4.2 The following options are available under this specifi-cation and are to be specified in the con
10、tract or purchase orderwhen required:4.2.1 Chromium plated finish,4.2.2 Short Plumbing (hospital) threads,4.2.3 Certification (Section 16), and4.2.4 Test and Inspection Reports, if required (Section 17).4.3 In addition, when material is purchased for agencies ofthe U.S. government, it shall conform
11、to the supplementaryrequirements as defined herein when specified in the contractor purchase order.5. Materials and Manufacture5.1 Copper pipe nipples shall be produced from regular orextra strong pipe conforming to the requirements of Specifi-cation B42.5.2 Brass pipe nipples shall be produced from
12、 regular orextra strong pipe conforming to the requirements of Specifi-cation B43.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved April 1, 2016. Published Ma
13、y 2016. Originallyapproved in 1981. Last previous edition approved in 2011 as B687 99 (2011).DOI: 10.1520/B0687-99R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer t
14、o the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch
15、.dla.mil.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.3 Chromium-plated pipe nipples shall be produced fromregular weight brass pipe conforming to the requirements
16、ofSpecification B43.6. Chemical Composition6.1 The chemical composition shall conform to the require-ments of the specification under which the pipe was ordered.7. Temper7.1 The product temper and its properties and characteristicsshall conform to the requirements of the specification underwhich the
17、 pipe was ordered.8. Dimensions, Mass and Permissible Variations8.1 Lengths:8.1.1 The standard lengths and sizes of nipples generallyavailable are shown in Table 2. The availability of such nipplesindicated by pipe size are shown in Table 3.8.1.2 Special lengths and sizes of nipples are permitted to
18、 bespecified when required. Standard and special lengths shallconform to the tolerance requirements of 8.1.3.8.1.3 TolerancesNipples with lengths up through 12 in.(305 mm) long shall have a length tolerance of 6116 in.(1.6 mm). Nipples over 12 in. long shall have a tolerance of618 in. (3.2 mm).8.2 T
19、hreads:8.2.1 Pipe nipples shall be threaded on both ends with NPTTaper Pipe Threads conforming to the requirements of ANSIB1.20.1, except for close nipples where L4 and V are shorter,due to fewer imperfect threads. It is standard manufacturingpractice on all other nipple lengths to vary the L4 6 two
20、threads. All other dimensions, tolerances, and gaging practicesremain the same as ANSI B1.20.1, and the Annex.8.2.1.1 Threads shall be right hand on both ends, exceptwhen otherwise specified.8.2.2 Threads, Chromium-Plated NipplesThreads onchromium-plated nipples shall be gaged after plating. Threads
21、on18 to 1-in. standard pipe size nipples shall be NPT TaperPipe Threads, in accordance with 8.2.1. Threads on 114 to 2-in.standard pipe size nipples shall be short plumbing (hospital)threads, in accordance with Table 1.On18 to 1-in. standardpipe size nipples, short plumbing (hospital) threads, ifspe
22、cified, shall be in accordance with Table 1.9. Workmanship, Finish, and Appearance9.1 End FinishThe ends of the pipe nipples shall bechamfered on the outside at an angle of 35 6 10 to the centralaxis. (It is standard practice that the18-in. nominal size nipplesneed not be chamfered.) Ends shall be c
23、ut reasonably square tothe central axis. All burrs on the outside shall be removed.9.2 Chromium PlatingChromium plate on brass nipplesshall meet the requirements of service condition SC I ofSpecification B456, except the equivalent nickel thicknessshall be 0.003 mm.10. Sampling10.1 Arandom sample of
24、 pipe nipples shall be selected fromone production lot in accordance with MIL-STD-105 at In-spection Level II. In terms of defects per 100 units, theAcceptable Quality Level (AQL) shall be 1.5.10.1.1 Production LotA production lot shall be as deter-mined by the manufacturer, provided that all of the
25、 pipe usedin a single production lot shall comply with the provisions ofSection 5 and all of the nipples shall be of the same size,length, type, weight, finish, and thread form.11. Number of Tests and Retests11.1 Allowances for resampling and retesting shall be inaccordance with the Inspection Level
26、 and Acceptable QualityLevels detailed in 10.1.12. Significance of Numerical Limits12.1 For the purpose of determining compliance with thespecified limits for the requirements listed in the followingtable, an observed value shall be rounded as indicated inaccordance with the rounding method of Pract
27、ice E29:PropertyRounded Unit forObserved or Calculated ValueLinear DimensionsTolerancesnearest unit in the last right-hand significantdigit used in expressing the limiting value13. Inspection13.1 Each sample nipple shall be examined visually toverify conformance with each of the following requiremen
28、ts:13.1.1 The material is the type and weight of materialspecified,13.1.2 The finish is as specified, if chromium-plated,13.1.3 The ends are reasonably square to the central axisand all burrs have been removed, and13.1.4 Threads are not burred or damaged.13.2 Each sample nipple shall be inspected to
29、 verify con-formance with each of the following requirements:13.2.1 Pipe size,13.2.2 Length,13.2.3 Thread dimensions, and13.2.4 Chamfer.TABLE 1 Short Plumbing (Hospital) ThreadsA, BNOTE 1Short plumbing (hospital) threads are normally used only onchromium-plated nipples. The purpose of such threads i
30、s that a minimumof thread shall remain exposed after the nipple is screwed into a fitting.NominalPipe Size,NPSOutsideDiameterof Pipe, DThreadsper in.,NOverall ExternalThread Length, L4Inches Threads18 0.405 27 0.26 714 0.540 18 0.33 638 0.675 18 0.33 612 0.840 14 0.43 634 1.050 14 0.43 61 1.315 1112
31、 0.52 6114 1.660 1112 0.52 6112 1.900 1112 0.52 62 2.375 1112 0.52 6AAll dimensions, except threads per inch, in inches.BThis table represents a modification of Table 2 ofANSI B1.20.1; L4is modified asshown. E2, L2, and V are modified accordingly. The threads shall meet the gagingrequirements of Sec
32、tions 6 and 11 of this specification.B687 99 (2016)213.3 Chromium PlatingUnless otherwise specificallyagreed upon between the manufacturer and the purchaser, theindividual samples need not be individually inspected as totheir chromium plating. It shall be sufficient for the manufac-turer to certify
33、that (a) random nipples from the chromiumplating process have been tested for conformance with Speci-fication B456 (which records shall be retained by the manu-facturer) and do in fact conform and (b) there has been nosignificant change in the chromium plating process since thetests were last run.13
34、.3.1 If inspection of the individual nipples is agreed upon,then it shall be conducted by any method allowed by Specifi-cation B456.13.4 PipeThe pipe from which each production lot ismanufactured shall be of the same size, type, and weight andshall be tested in accordance with the applicable ASTM pi
35、pespecification. At the option of the manufacturer, the pipe maybe tested by the manufacturer, by the pipe mill that producedthe pipe, or by an independent laboratory.13.5 Source InspectionIf required, source inspection ofthe product by the purchaser shall be established by agreementbetween the manu
36、facturer or supplier and purchaser at the timeof placing the order. In such cases, the nature of the facilitiesnecessary for the inspector to determine that the product is inconformance to this specification shall be included in theagreement. The inspection shall be conducted so as not tounnecessari
37、ly interfere with normal operations.14. Rejection and Rehearing14.1 Rejection:14.1.1 Product that fails to conform to the requirements ofthis specification when inspected by the purchaser or purchas-ers agent, shall be subject to rejection.14.1.2 Rejection shall be reported to the manufacturer orsup
38、plier promptly and in writing.14.1.3 In case of dissatisfaction with the results upon whichrejection is based, the manufacturer or supplier is permitted tomake claim for a rehearing.14.2 Rehearing:14.2.1 As a result of product rejection, the manufacturer orsupplier is permitted to make claim for a r
39、etest to be conductedby the manufacturer or supplier and the purchaser. Samples ofthe rejected product shall be taken in accordance with thisproduct specification, and subjected to test by both partiesusing the test methods specified in the product specification, or,alternatively, upon agreement of
40、both parties, an independentlaboratory shall be selected.15. Certification15.1 When specified in the contract or purchase order, thepurchaser shall be furnished certification that samples repre-senting each lot have been tested or inspected as directed in thisspecification and the requirements have
41、been met.16. Test and Inspection Reports16.1 When specified in the contract or purchase order, areport of test and inspection results shall be furnished.17. Packaging and Package Marking17.1 Individual nipples are not normally identified. Nipplespackaged shall have their containers legibly marked to
42、 showbrand or name of manufacturer, quantity, size, length, type ofmaterial, weight of material (if other than regular), and finish(if chromium-plated).TABLE 2 Pipe Nipples by Length and Pipe SizeType ofNipple1814381234 1114 112 2212 3312 4568Pipe Nipple Lengths, in.A,BClose (cl)3478 1118 138 112 15
43、8 134 2212 258 234 278 3318 312112 112 112 112 . . . . . . . . . . . .22222222. . . . . . .212 212 212 212 212 212 212 212 212 . . . . . . .33333333333. . . .312 312 312 312 312 312 312 312 312 312 312 . . . . .4444444444444. .412 412 412 412 412 412 412 412 412 412 412 412 412 412 412 .555555555555
44、5555512 512 512 512 512 512 512 512 512 512 512 512 512 512 512 512666666666666666677777777777777778888888888888888999999999999999910 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1011 11 11 11 11 11 11 11 11 11 11 11 11 11 11 1112 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12Rightandleft. . 4444444. . .
45、 . .ANipples shorter than close nipples are not recommended for pressure application.B1 in. = 25.4 mm.TABLE 3 Pipe Nipple Sizes According to MaterialWeightNominal Pipe Sizes, in.18 to 2in., incl214 to 4in., incl5 and 6in.8in.Regular weight brass XXXXExtrastrongbrasRegular copper XXXXExtra strong cop
46、per X X . . . . . .Chromium-plated regular brass X . . . . . . . . .B687 99 (2016)317.1.1 At the manufacturers option, large size, extra longnipples and odd lots are bagged or bundled with tags identi-fying the product as specified in 15.1.17.2 Chromium-Plated NipplesExcept for close nipples,chromiu
47、m-plated nipples shall be individually packaged,wrapped, or otherwise protected to ensure against nicking orother cosmetic damage in transit.17.3 Nipples shall be packaged and prepared for shipmentin such a manner as to ensure acceptance by common carrierfor transportation at the lowest rate applica
48、ble and to affordprotection from the normal hazards of transportation.18. Keywords18.1 close nipple; pipe nipple; short plumbing (hospital)threadsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in theinquiry, contract, or order for
49、agencies of the U.S. government.S1. Part Numbering SystemS1.1 This supplement provides a part numbering system forthe identification of standard items for government use ofSpecification B687.NOTE 1The government encourages the general use of this partnumbering system to achieve maximum parts standardization.S1.2 The part number consists of the document identifierfollowed by the code for the weight of material (regular orextra strong), a dash, dash number (Table S1.1),
