1、Designation: A865/A865M 06 (Reapproved 2012)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. Scope*1.1 This specification covers black or galvanized
3、welded 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 (nomin
4、al 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 equ
5、ivalents; therefore, 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:2A700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentB6 Speci
6、fication 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 Threads45L Speci
7、fication 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 manufac
8、ture (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 Certification (see 11.3)
9、, 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 31 seamless steel pipe; steel pipe; weldedsteel pipe; zinc coated steel pipeTABLE 2 Coupling Th
10、read 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 12.638 10 18 0.875 22.2 118 29 0.622
11、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 2.750 69.8 2116 52 2.288 58.1 2.304
12、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 %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. mm
13、NLPitch diameter,in. mm ( E1)Handtight engagement18 6 27 0.563 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.
14、3 2 50 1.5834 40.22112 40 1112 2.200 55.9 2 50 1.8223 46.2925012 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
15、 150 8 7.390 187.7 31516 100 6.5060 165.25Outside 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 (2012)3TABLE 4 Coupling Thread DimensionsTaper-Tapped (NPT) Recessed for Extra-Strong and Double-Extra-Strong Pipe (Dimensionsco
16、nform to Line Pipe Couplings in accordance with API 5L)ANPS Designator 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 0.62
17、70 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 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.
18、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 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
19、 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 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
20、 over 1 %Stand off tolerances: 1 threadARefer to API 5B for Threading 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)A865/A865M 06 (2012)4SUMMARY OF CHANGESCommit
21、tee A01 has identified the location of selected changes to this specification since the last issue,A865 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 Internati
22、onal takes no position respecting the validity of any patent rights asserted 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 thei
23、r own responsibility.This standard is subject to revision at any time by 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 b
24、e addressed to ASTM International Headquarters. Your comments will receive 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 Standard
25、s, at the address shown below.This standard is copyrighted by ASTM International, 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-
26、9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 3 Recessed Taper-Tapped Coupling and Pipe (See Table 4 for Coupling Dimensions)A865/A865M 06 (2012)5
