1、DEUTSCHE NORM October 1995 Male fittings for use with compression couplings DIN - 3871 ICs 23.040.60 Descriptors: Compression couplings, male fittings. Ltlose und geltete Rohrverschraubungen; berwurfschrauben Supersedes November 1982 edition. In keeping with current practice in standards published b
2、y the International Organization for Standardization (/SO), a comma has been used throughout as the decimal marker. Foreword Amendments This standard has been prepared by Technical Committee Rohrverschraubungen. The following amendments have been made to the November 1982 edition. a) Specifications
3、for types LL3 and ALL4 M10 x 1 fittings are no longer included. b) A reference to DIN 3863 has been included for type B fittings. c) The standard has been editorially revised. Previous editions DIN 3871: 1954-17,1982-11. 1 Scope and field of application This standard specifies dimensions and materia
4、ls for male fittings for use with compression couplings. Such fittings are intended to fit into threaded holes as specified in DIN 3854. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative refer- ences are cited at the
5、 appropriate places in the text and the titles of the publications are listed below. For dated refer- ences, subsequent amendments to or revisions of any of these publications apply to this standard only when incorpo- rated in it by amendment or revision. For undated references, the latest edition o
6、f the publication referred to applies. DIN 13-5 IS0 metric screw threads; 1 mm and 1,25 mm fine pitch threads with diameters from 73 mm to 200 mm; nominal sizes DIN 13-6 IS0 metric screw threads; 13 mm fine pitch threads with diameters from 12 mm to 300 mm; nominal sizes DIN 13-14 IS0 metric screw t
7、hreads; tolerance system for threads 1 mm in diameter and larger Pressure and temperature specifications for components subject to internal or external pressure; concepts and nominal pressure stages Threaded holes for male fittings for use with compression couplings Compression couplings; technical
8、delivery conditions Olives for use with compression couplings and fittings; design and type W pori Double cones for use with compression couplings; design and type X port Spherical liners for use with compression couplings; design and type U and Y ports Phosphating of metals; methods of test DIN 240
9、1-1 DIN 3854 DIN 3859 DIN 3861 DIN 3862 DIN 3863 DIN 50 942 Continued on pages 2 and 3. Beuth Verlag GmbH, Berlin, has the exclusive nght of sale for German Standards (OIN-Normen). DIN 3871 : 1995 Engl. Price group 5 01.97 Sales-No. O1 05 Page 2 DIN 3871 3 Dimensions Dimensions in mm Type A Type B f
10、or use with DIN 3861 olives or DIN 3862 double cones for use with DIN 3863 spherical liners Thread chamfered down to minor diameter. Figure 1 Figure 2 Designation of a type A (A) light duty series (L) steel (St) male fitting for a pipe outside diameter of 12 mm: Male fitting DIN 3871 - AL 12-St Seri
11、es - LL Very light duty series L Light duty series 4 Material Male fittings shall normally be manufactured from steel as specified in DIN 3859. If they are to be manufactured from other mate- rials (cf. DIN 3859), this shall be specified in the standard designation by appending the apppropriate mate
12、rial symbol. DIN 3871 Page 3 5 Screw thread and finish Male fittings shall have an IS0 metric screw thread as specified in DIN 13-5 and DIN 13-6 made to tolerances as specified in DIN 13-14, tolerance class medium. The standard finish of male fittings shall be Znph r5f as specified in DIN 50 942. Other possible types of finish (cf. DIN 3859) shall be specified in the standard designation by appending the appropriate symbol. 6 Technical delivery conditions Male fittings shall comply with the technical delivery conditions specified in DIN 3859.
