1、Designation: A 865/A 865M 06Standard Specification forThreaded Couplings, Steel, Black or Zinc-Coated(Galvanized) Welded or Seamless, for Use in Steel PipeJoints1This standard is issued under the fixed designation A 865/A 865M; the number immediately following the designation indicates the yearof or
2、iginal 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers black or galvanized welded orseam
3、less 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 (nominal pipe size)
4、 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 equivalents; the
5、refore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2A 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for ShipmentB6 Specification for Z
6、incE 376 Practice for Measuring Coating Thickness byMagnetic-Field or Eddy-Current (Electromagnetic) Exami-nation 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 Threads45L Specification
7、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 Method of manufacture (wel
8、ded 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 Certification (see 11.3), if requ
9、ired.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 couplingsover NPS 312 DN 90 sh
10、all be electric-welded.5. Chemical Composition5.1 The steel shall conform to the chemical compositionrequirements as specified in Table 1.6. Dimensions6.1 Coupling dimensions are listed in Tables 2-4 and Figs.1-3.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless
11、Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved July 1, 2006. Published August 2006. Originallyapproved in 1986. Last previous edition approved in 2003 as A 865-03.2For referenced ASTM standards, visit the ASTM
12、 website, 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.
13、4Available from American Petroleum Institute (API), 1220 L. St., NW, Wash-ington, DC 20005.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Permissible Variations in
14、 Dimensions7.1 DiameterFor couplings NPS 112 DN 40 and under,the outside diameter at any point shall not vary more than164in. 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 % from thestandard sp
15、ecified.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 eitherthe hot-dipped (
16、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 coating on theoutside surf
17、ace 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 E 376 or using another methodthat is mutually agreed upon between
18、 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 of couplings suffic
19、ient 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, unlesspower tight is specifi
20、ed 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-extra-strong pipe. Tap
21、er-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 couplings (Table 4) c
22、onform 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, at all times while
23、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 accordancewith this specifi
24、cation.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.11.2 Responsibility for InspectionUnless otherwise speci-fied in the contract or purchase
25、order, the manufacturer isresponsible 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
26、 disapproved by the pur-chaser. The 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, fu
27、r-nish to the purchaser a certificate 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, i
28、f it does not meet therequirements 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
29、 coupling shall be marked with the 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.13.3 When specified on the purchas
30、e order, packaging,marking, and loading for shipment shall be in accordance withPractice A 700.13.4 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
31、 be used.14. Keywords14.1 black steel pipe; seamless steel pipe; steel pipe; weldedsteel pipe; zinc coated steel pipeTABLE 1 Chemical RequirementsComposition, max %Phosphorus SulfurAll processes 0.14 0.35A 865/A 865M 062TABLE 2 Coupling Thread DimensionStraight-Tapped (NPSC) for Standard Weight Pipe
32、NPSDesignatorDNDesignatorThreads/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 12.638 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
33、.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 2.750 69.8 2116 52 2.288 58.1 2.304 58.5Outside diametertolerances:For NPS 112 DN 40 and under +0
34、.015 in. 0.4 mm0.031 in. 0.8 mmFor NPS 2 DN 50 and over 61%TABLE 3 Coupling Thread DimensionsTaper-Tapped (NPT) Non-Recessed for Standard-Weight PipeNPS Designator DN Designator Threads/in.Outside diameter,in. mmWCoupling min length,in. mmNLPitch diameter,in. mm (E1)Handtight engagement18 6 27 0.563
35、 14.334 19 0.3736 9.4914 8 18 0.719 18.3 118 29 0.4916 12.4938 10 18 0.875 22.2 118 29 0.6270 15.9312 15 14 1.063 27.0 112 38 0.7784 19.7734 20 14 1.313 33.4 1916 40 0.9889 25.12125112 1.576 40.0 11516 49 1.2386 31.46114 32 1112 1.900 48.3 2 50 1.5834 40.22112 40 1112 2.200 55.9 2 50 1.8223 46.29250
36、12 2.750 69.8 2116 52 2.2963 58.33212 65 8 3.250 82.5 3116 78 2.7622 70.163 80 8 4.000 101.6 3316 81 3.3885 86.07312 90 8 4.625 117.5 3516 84 3.8888 98.784 100 8 5.000 127.0 3716 87 4.3871 111.435 125 8 6.296 159.9 31116 94 5.4493 138.416 150 8 7.390 187.7 31516 100 6.5060 165.25Outside diametertole
37、rances:For NPS 112 DN 40 and under +0.015 in. 0.4 mm0.031 in. 0.8 mmFor NPS 2 DN 50 and over 61%A 865/A 865M 063TABLE 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 Designa
38、tor DN Designator Threads/in.Outside diameter,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
39、218 54 0.9889 25.12125112 1.576 40.0 258 67 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 10
40、0 8 5.200 132.1 412 114 4.3871 111.435 125 8 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
41、 17.000 431.8 634 171 15.8758 403.2518 450 8 19.000 482.6 718 181 17.8750 454.0320 500 8 21.000 533.4 758 194 19.8703 504.71Outside 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 61%Stand off tolerances: 61 threadARefer to API 5B for Threadin
42、g and Gaging Practice.FIG. 1 Straight-Tapped Coupling and Pipe (See Table 2 for Coupling Dimensions)FIG. 2 Nonrecessed Taper-Tapped Coupling and Pipe (See Table 3 for Coupling Dimensions)A 865/A 865M 064SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specifica
43、tion since the last issue,A 865 03, that may impact the use of this specification. (Approved July 2006)(1) Revised all applicable sections of the specification toinclude metrics, creating a dual unit specification.ASTM International takes no position respecting the validity of any patent rights asse
44、rted in connection with any item mentionedin this 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
45、 the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will recei
46、ve careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Inter
47、national, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 3 Recessed Taper-Tapped Coupling and Pipe (See Table 4 for Coupling Dimensions)A 865/A 865M 065
