1、Designation: A865/A865M 06 (Reapproved 2017)Standard Specification forThreaded Couplings, Steel, Black or Zinc-Coated(Galvanized) Welded or Seamless, for Use in Steel PipeJoints1This standard is issued under the fixed designation A865/A865M; the number immediately following the designation indicates
2、 the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers black or galvanized w
3、elded orseamless threaded steel couplings for use with steel pipe inNPS18 to NPS 20 DN 6 to DN 500 inclusive (Note 1).Couplings ordered under this specification are intended for theuses outlined in the pipe specifications referencing this speci-fication.NOTE 1The dimensionless designator NPS (nomina
4、l pipe size) andDN diameter nominal has been substituted in this standard for suchtraditional terms as nominal diameter, size, and nominal size.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equi
5、valents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
6、Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A700 Guide for Packaging, Marking, and Loading Methodsfor Steel Products for
7、ShipmentB6 Specification for ZincE376 Practice for Measuring Coating Thickness byMagnetic-Field or Eddy-Current (Electromagnetic) Test-ing Methods2.2 ANSI Standard:B 1.20.1 Pipe Threads32.3 API Standards:5B Specification for Threading, Gaging, and Thread Inspec-tion of Casing, Tubing, and Line Pipe
8、Threads45L Specification for Line Pipe43. Ordering Information3.1 Orders for material under this specification shouldinclude the following, as required, to describe the desiredmaterial adequately:3.1.1 Specification number,3.1.2 Quantity (pieces),3.1.3 Name of material (steel pipe-couplings),3.1.4 M
9、ethod of manufacture (welded or seamless),3.1.5 Finish (black or Type I or Type II) galvanized (see8.1),3.1.6 Size (NPS designator DN),3.1.7 Standard or extra-strong classification,3.1.8 Taper tapped-couplings for NPS 2 DN 50 andsmaller, either recessed or non-recessed, if desired, and3.1.9 Certific
10、ation (see 11.3), if required.4. Process4.1 The steel for both welded and seamless couplings shallbe made by one or more of the following processes: open-hearth, electric-furnace, or basic-oxygen.4.2 Welded couplings NPS 312 DN 90 and under may bebutt-welded, unless otherwise specified. Welded coupl
11、ingsover NPS 312 DN 90 shall be electric-welded.5. Chemical Composition5.1 The steel shall conform to the chemical compositionrequirements as specified in Table 1.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct respons
12、ibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Sept. 1, 2017. Published October 2017. Originallyapproved in 1986. Last previous edition approved in 2012 as A865/A865M 06(2012). DOI: 10.1520/A0865_A0865M-06R17.2For referenced ASTM standards, visit the ASTM web
13、site, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.4Ava
14、ilable from American Petroleum Institute (API), 1220 L. St., NW,Washington, DC 20005.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on
15、standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.16. Dimensions6.1 Coupling dimensions are listed in Tables 2-4 and Figs.1-3.7. Permis
16、sible Variations in Dimensions7.1 DiameterFor couplings NPS 112 DN 40 and under,the outside diameter at any point shall not vary more than164 in. 0.4 mm over nor more than132 in. 0.8 mm under thestandard specified. For couplings NPS 2 DN 50 and over, theoutside diameter shall not vary more than 61 %
17、 from thestandard specified.7.2 ThreadsThe variation of the threads shall not exceed6112 turns for straight tapped and 61 turn for taper tappedfrom nominal as determined using gages and the gagingpractices in ANSI B 1.20.1.8. Galvanized Couplings8.1 Galvanized couplings may be coated with zinc by ei
18、therthe hot-dipped (Type 1) or by the electrogalvanizing process.(Type II) as specified by the purchaser. The zinc used for thecoating shall be any grade of zinc conforming to SpecificationB6.8.2 Hot-dipped galvanized couplings are coated prior tothreading.8.2.1 The minimum weight of the zinc coatin
19、g on theoutside surface of the hot-dipped galvanized couplings shall beequivalent to 1.6 oz/ft2490 g/m2.8.2.2 The weight of the zinc coating on the outside surfaceshall be determined by the use of a magnetic thickness gage,using the procedure in Practice E376 or using another methodthat is mutually
20、agreed upon between the purchaser and themanufacturer.8.3 Electrogalvanized couplings are coated either before orafter threading.8.3.1 The weight of the zinc coating on the outside surfaceof the electrogalvanized couplings shall be equivalent to 0.18oz/ft255 g/m2 (see also 8.2.2)8.4 SamplingSamples
21、of couplings sufficient to determinetheir conformance with the requirements of this specification,shall be taken at random for each lot of couplings of the samesize.9. Threading9.1 The coupling threads shall be in accordance with ANSIB 1.20.1. The couplings shall be applied handling tight, unlesspow
22、er tight is specified on the order. Taper-tapped couplingsshall be furnished on all weights of pipe NPS 212 DN 65 andlarger. For sizes NPS 2 DN 50 and smaller, it is regularpractice to furnish straight-tapped couplings for standardweight pipe and taper-tapped couplings for extra-strong anddouble-ext
23、ra-strong pipe. Taper-tapped couplings may bespecified for pipe sizes NPS 2 DN 50 and under. Taper-tappedcouplings furnished for standard-weight pipe may be nonre-cessed (see Table 3) or recessed (see Table 4). Couplingsfurnished for extra-strong and double-extra strong pipe arerecessed. Recessed co
24、uplings (Table 4) conform to API Speci-fication 5L.10. Finish10.1 The finished couplings shall be free of defects.10.2 The zinc coating on galvanized couplings shall be freeof voids or excessive roughness.11. Inspection and Certification11.1 The inspector representing the purchaser shall haveentry,
25、at all times while work on the contract of the purchaseris being performed, to all parts of the manufacturers worksthat concern the manufacture of the material ordered. Themanufacturer shall afford the inspector all reasonable facilitiesto satisfy him that the material is being furnished in accordan
26、cewith this specification.All tests and inspection shall be made atthe place of manufacture prior to shipment, unless otherwisespecified, and shall be so conducted as not to interfereunnecessarily with the operation of the works.TABLE 1 Chemical RequirementsComposition, max %Phosphorus SulfurAll pro
27、cesses 0.14 0.35TABLE 2 Coupling Thread DimensionStraight-Tapped (NPSC) for Standard Weight PipeNPSDesignatorDNDesignatorThreads/in.Outside diameter,in. mmWCoupling min length,in. mmNLPitch diameter,in. mmmin max18 6 27 0.563 14.334 19 0.370 9.4 0.377 9.614 8 18 0.719 18.3 118 29 0.486 12.3 0.497 12
28、.638 10 18 0.875 22.2 118 29 0.622 15.8 0.632 16.112 15 14 1.063 27.0 112 38 0.772 19.6 0.785 19.934 20 14 1.313 33.4 1916 40 0.982 24.9 0.996 25.3125112 1.576 40.0 11516 49 1.231 31.3 1.247 31.7114 32 1112 1.900 48.3 2 50 1.575 40.0 1.592 40.4112 40 1112 2.200 55.9 2 50 1.814 46.1 1.831 46.525012 2
29、.750 69.8 2116 52 2.288 58.1 2.304 58.5Outside diametertolerances:For NPS 112 DN 40 and under +0.015 in. 0.4 mm0.031 in. 0.8 mmFor NPS 2 DN 50 and over 1 %A865/A865M 06 (2017)211.2 Responsibility for InspectionUnless otherwise speci-fied in the contract or purchase order, the manufacturer isresponsi
30、ble for the performance of all inspection and testrequirements specified herein. Except as specified in thecontract order, the producer may use his own or any othersuitable facilities for the performance of the inspection and testrequirements specified herein unless disapproved by the pur-chaser. Th
31、e purchaser shall have the right to perform any of theinspections and tests set forth in this specification where suchinspections are deemed necessary to assure that materialconforms to prescribed requirements.11.3 The manufacturer or supplier shall upon request, fur-nish to the purchaser a certific
32、ate of inspection stating that thematerial has been sampled, tested, and inspected in accordancewith this specification, and has been found to meet therequirements.12. Rejection12.1 Each coupling received from the manufacturer may beinspected by the purchaser and, if it does not meet therequirements
33、 of this specification based upon the inspection,the coupling may be rejected and the manufacturer shall benotified. Disposition of rejected couplings shall be the matterof agreement between the manufacturer and the purchaser.13. Product Marking and Packing13.1 Each coupling shall be marked with the
34、 trademark ofthe manufacturer by metal stamp or paint.13.2 The cartons in which the couplings are packed shallbear the manufacturers name or trademark, the NPS DNdesignator, the finish (black or galvanized), and the number ofpieces.TABLE 3 Coupling Thread DimensionsTaper-Tapped (NPT) Non-Recessed fo
35、r Standard-Weight PipeNPSDesignatorDNDesignatorThreads/in.Outsidediameter,in.mmWCouplingminlength,in.mmNLPitchdiameter,in.mm(E1)Handtightengagement18 6 27 0.56314.334 19 0.37369.4914 8 18 0.71918.3118 29 0.491612.4938 10 18 0.87522.2118 29 0.627015.9312 15 14 1.06327.0112 38 0.778419.7734 20 14 1.31
36、333.41916 40 0.988925.12125112 1.57640.011516 49 1.238631.46114 32 1112 1.90048.32501.583440.22112 40 1112 2.20055.92501.822346.2925012 2.75069.82116 52 2.296358.33212 65 8 3.25082.53116 78 2.762270.163 80 8 4.000101.63316 81 3.388586.07312 90 8 4.625117.53516 84 3.888898.784 100 8 5.000127.03716 87
37、 4.3871111.435 125 8 6.296159.931116 94 5.4493138.416 150 8 7.390187.731516 100 6.5060165.25Outsidediametertolerances:For NPS 112 DN 40 andunder+0.015in.0.4mm0.031in.0.8mmFor NPS 2 DN 50 andover1 %A865/A865M 06 (2017)313.3 When specified on the purchase order, packaging,marking, and loading for ship
38、ment shall be in accordance withPractice A700.13.4 Bar CodingIn addition to the requirements in 13.1,13.2, and 13.3, bar coding is acceptable as a supplementalidentification method. The purchaser may specify in the ordera specific bar coding system to be used.14. Keywords14.1 black steel pipe; seaml
39、ess steel pipe; steel pipe; weldedsteel pipe; zinc coated steel pipeTABLE 4 Coupling Thread DimensionsTaper-Tapped (NPT) Recessed for Extra-Strong and Double-Extra-Strong Pipe (Dimensionsconform to Line Pipe Couplings in accordance with API 5L)ANPS Designator DN Designator Threads/in.Outside diamete
40、r,in. mmWCoupling min length,in. mmNLPitch diameterin. mm(E1) Handtight engagement18 6 27 0.563 14.3 1116 27 0.3736 9.4914 8 18 0.719 18.3 158 41 0.4916 12.4938 10 18 0.875 22.2 158 41 0.6270 15.9312 15 14 1.063 27.0 218 54 0.7784 19.7734 20 14 1.313 33.4 218 54 0.9889 25.12125112 1.576 40.0 258 67
41、1.2386 31.46114 32 1112 2.054 52.2 234 70 1.5834 40.22112 40 1112 2.200 55.9 234 70 1.8223 46.2925012 2.875 73.0 278 73 2.2963 58.33212 65 8 3.375 85.7 418 105 2.7622 70.163 80 8 4.000 101.6 414 108 3.3885 86.07312 90 8 4.625 117.5 438 111 3.8888 98.784 100 8 5.200 132.1 412 114 4.3871 111.435 125 8
42、 6.296 159.9 458 117 5.4493 138.416 150 8 7.390 187.7 478 124 6.5060 165.258 200 8 9.625 244.5 514 133 8.5000 215.9010 250 8 11.750 298.5 534 146 10.6209 269.7712 300 8 14.000 355.6 618 156 12.6178 320.4914 350 8 15.000 381.0 638 162 13.8726 352.3616 400 8 17.000 431.8 634 171 15.8758 403.2518 450 8
43、 19.000 482.6 718 181 17.8750 454.0320 500 8 21.000 533.4 758 194 19.8703 504.71Outside diameter toler-ances:For NPS 112 DN 40 and under +0.015 in. 0.4 mm0.031 in. 0.8 mmFor NPS 2 DN 50 and over 1 %Stand off tolerances: 1 threadARefer to API 5B for Threading and Gaging Practice.FIG. 1 Straight-Tappe
44、d Coupling and Pipe (See Table 2 for Coupling Dimensions)FIG. 2 Nonrecessed Taper-Tapped Coupling and Pipe (See Table 3 for Coupling Dimensions)A865/A865M 06 (2017)4ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this
45、 standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be
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