1、February 2012 Translation by DIN-Sprachendienst.English price group 5No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 23.040.60!%:-N“2231043www.din.deDDIN 3872Non-soldering compression couplings Union nuts for butt joints,English translation of DIN 3872:2012-02Ltlose Rohrverschraubungen berwurfmuttern fr Stoausfhrung,Englische bersetzung von DIN 3872:2012-02Raccords visss pour tuyaux sans brasage crous-raccords a
3、bouter,Traduction anglaise de DIN 3872:2012-02SupersedesDIN 3872:2003-08www.beuth.deDocument comprises 6 pagesIn case of doubt, the German-language original shall be considered authoritative.08.14 DIN 3872:2012-02 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Norm
4、ative references . 4 3 Dimensions 5 4 Designation . 6 5 Nominal pressure 6 6 Material 6 7 Finish . 6 8 Technical delivery conditions . 6 DIN 3872:2012-02 3 Foreword This document has been prepared by Working Committee NA 082-00-07 AA Rohrverschraubungen of the Normenausschuss Rohrleitungen und Dampf
5、kesselanlagen (NARD) (Piping and Boiler Plant Standards Committee). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. Amendments This standa
6、rd differs from DIN 3872:2003-08 as follows: a) normative references have been updated; b) requirements regarding the finish have been modified; c) the standard has been editorially revised. Previous editions DIN 3872: 1961-11, 1982-11, 1985-06, 1996-11, 2003-08 DIN 3872:2012-02 4 1 Scope This stand
7、ard applies to union nuts for butt joints in solderless compression couplings having a cutting ring, which are used in pneumatic brake systems and other pneumatic systems in road vehicles. 2 Normative references The following referenced documents are indispensable for the application of this documen
8、t. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 13-6, ISO general purpose metric screw threads Part 6: Nominal sizes for 1,5 mm fine pitch threads Nominal diameter from 12 mm to 300
9、 mm DIN 3859-1, Compression couplings Part 1: Technical delivery conditions DIN 50979, Metallic coatings Electroplated coatings of zinc and zinc alloys on iron or steel with supplementary Cr(VI)-free treatment DIN EN ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in
10、 technical product documentation DIN EN ISO 4759-1:2001-04, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data VDMA 245761 )Fluid power Requirements and designat
11、ions for corrosion-protection coatings free of hexavalent chrome 1) Registered in the DITR database of DIN Software GmbH, obtainable from: Beuth Verlag GmbH, 10772 Berlin. DIN 3872:2012-02 5 3 Dimensions Dimensions as given in Figure 1 and Table 1. Dimensions in millimetres. Tolerances for hexagon h
12、eads as for product grade B as in DIN EN ISO 4759-1:2001-04. Details not given are to be selected accordingly. Surface texture is to be given as Ra in accordance with DIN EN ISO 1302. Key aThread counterbored up to major diameter bA maximum excess of 1 mm is permitted for cold-pressed union nuts. cd
13、k= thread minor diameter Figure 1 Union nut Table 1 Dimensions Pipe outside diameter Thread d1d2s t1Mass kg/100 units B11 2,00+ 15 M22 1,5 15 27 21,5 5,7 16 M22 1,5 16 27 21,5 5,2 DIN 3872:2012-02 6 4 Designation Designation of a union nut for butt joints and for a pipe outside diameter of 15 mm, ma
14、de of steel (St): Union nut DIN 3872 15 St 5 Nominal pressure 2,5 MPa (25 bar) 6 Material Materials as in DIN 3859-1 shall be used, as a rule steel. 7 Finish ISO general purpose metric screw threads as in DIN 13-6, with tolerances as for tolerance quality medium as in DIN ISO 965-1 shall be used. Requirements for surface protection can be specified in accordance with VDMA 24576 or DIN 50979. 8 Technical delivery conditions The requirements of DIN 3859-1 apply.
