1、Designation: D 2749 02An American National StandardStandard Symbols forDimensions of Plastic Pipe Fittings1This standard is issued under the fixed designation D 2749; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 These symbols specify terminology for the dimensionsof pipe fittings made of plastic materials. It consists of a list ofl
3、etter designations with definitions, followed by drawings oftypical fittings, with the significant dimensions labeled inaccordance with these letter designations.2. Letter Designations of Dimensions2.1 The letter designations are defined as follows:A = socket entrance diameter, measured at intersect
4、ionof socket diameter and chamfer or radius,regardless of length “C”,B = socket bottom diameter, measured at intersectionof socket diameter and radius,C = socket depth, measured from socket entrance faceto socket bottom face,D = inside diameter of body,E = wall thickness of socket, min,F = wall thic
5、kness of body,G = intersection of socket center lines to socket bottom(center-to-socket bottom), 90 elbows, tees, crosses, and shoulderon insert fittings; a laying length,H = intersection of socket center lines to end of fitting(center-to-end), 90 elbows, tees, crosses; center to face,J = intersecti
6、on of socket center lines to socket bottom(center-to-socket bottom), 45 elbow; a laying length,K = intersection of socket center lines to end of fitting(center-to-end), 45 elbow,L = length over-all, coupling,M = outside diameter of hub,N = socket bottom to socket bottom or seat thickness(center stop
7、 thickness or pipe stop thickness),P = insert length,Q = distance or width across flat,R = height of head,S = length of male thread, includes pilot,T = length of female thread,includes pilot,V = root diameter of barbs,W = cap height,XA = male end of spigot at top, see Fig. 1,XB = male end of spigot
8、at bottom, see Fig. 1Y = length of barb section,Z = outside diameter of barbsCB = counterbore on threaded fittings, optional,CM = length of male end, bushing,DJ = inside diameter, major, bushing,EJ = wall thickness of socket, major, bushing;wall thickness of male end, bushing,EN = wall thickness of
9、socket, minor, bushing,EW = radius on socket entrance,EX = thickness with 30 taper on socket entrance;30 entrance chamfer width, andEZ = thickness with 45 taper on socket entrance;45 entrance chamfer width.2.2 When there are two different values for one categoricaldimension on a fitting, the large o
10、ne shall be designated withthe letter for that category followed by a J meaning major, andthe small one shall be designated by the same letter followedby an N meaning minor; for example, on a 45-deg Y-branch,there are two J dimensions, the longer one is designated as JJand the shorter one as JN. Whe
11、n there are more than twodifferent values for one categorical dimension, they are desig-nated with the proper letter followed by an arabic number; forexample, L1, L2, and L3 for the three lengths on a plasticadapter to connect plastic pipe to a cast iron hub.3. Illustrations3.1 Illustrations of typi
12、cal fittings are shown in Figs. 2-22.4. Keywordsplastic pipe fitting; symbol definitions; symbols fordimensions1These symbols are under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Septemb
13、er 10, 2002. Published November 2002.Originally published as D 2749 68. Last previous edition D 2749 92 (1999)e1.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.FIG. 1 Reducer Bushings-SocketFIG. 2 Tapered SocketFIG. 3 90 Elbow-Socke
14、tFIG. 4 45 Elbow-SocketD 2749 022FIG. 5 Tee-SocketFIG. 6 Coupling-SocketFIG. 7 90 Elbow-ThreadedFIG. 8 45 Elbow-ThreadedFIG. 9 Tee-ThreadedFIG. 10 Cross-ThreadedFIG. 11 Coupling-ThreadedFIG. 12 Plug-ThreadedD 2749 023FIG. 13 Cap-ThreadedFIG. 14 Insert EndFIG. 15 Insert ElbowFIG. 16 Insert TeeFIG. 17
15、 Insert Adaptor, Male ThreadFIG. 18 Insert Adaptor, Female ThreadFIG. 19 Plastic AdapterFIG. 20 Plastic HubFIG. 21 Plastic AdapterD 2749 024ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this
16、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 reviewed every five years
17、 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 receive careful consideration at a meeting of theresponsible technical committe
18、e, 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 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 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 22 Plastic HubD 2749 025
