1、ICS 23.040.60Ltlose Rohrverschraubungen Reduzierstutzen mitDichtkegel 24 und O-Ring fr Schneidringanschlussnach DIN EN ISO 8434-1In keeping with current practice in standards published by the International Organization for Standardization(ISO), a comma has been used throughout as the decimal marker.
2、Ref. No. DIN 3946 : 2002-04English price group 05 Sales No. 000503.03DEUTSCHE NORM April 20023946 No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e.V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for
3、German Standards (DIN-Normen).Translation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.Compression fittings and couplingsReducing swivel adaptors with 24 cone compressionend and O-ring and with port as in DIN EN ISO 8434-1Continue
4、d on pages 2 to 4.ForewordThis standard has been prepared by Technical Committee Rohrverschraubungen of the NormenausschussRohrleitungen und Dampfkesselanlagen (Pipelines and Pressure Vessels Standards Committee), taking intoaccount the specifications of DIN EN ISO 8434-4.AmendmentsThis standard dif
5、fers from the November 1996 edition as follows:a) The specifications have been harmonized with those given in DIN EN ISO 8434-1 andDIN EN ISO 8434-4.b) Series L18 15, L22 15, L22 18, and series S fittings have been dropped (cf. DIN EN ISO 8434-4).c) The standard has been editorially revised.Previous
6、 editionDIN 3946: 1996-11.All dimensions are in millimetres.1 ScopeThis standard specifies the design and dimensions of reducing swivel adaptors with type B 24 conecompression end and O-ring as in DIN 3865 and with port as in DIN EN ISO 8434-1, for use in compressioncoupling assemblies.This standard
7、together withDIN EN ISO 8434-4,September 2000 edition,supersedesNovember 1996 edition.Page 2DIN 3946 : 2002-042 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These norma-tive references are cited at the appropriate places in the t
8、ext, and the titles of the publications are listed below.For dated references, subsequent amendments to or revisions of any of these publications apply to thisstandard only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to appl
9、ies.DIN 3853 Compression ends for coupling nutsDIN 3859-1 Compression fittings and couplings Technical delivery conditionsDIN 3865 Compression fittings and couplings 24 cone compression ends with O-ring for portsas in DIN EN ISO 8434-1DIN 53519-2 Determination of indentation hardness (IRHD) of soft
10、rubber using small specimensDIN EN ISO 4042 Fasteners Electroplated coatings (ISO 4042 : 1999)DIN EN ISO 8434-1 Metallic tube connections for fluid power and general use Part 1: 24 compressionfittings (ISO 8434-1 : 1994)DIN EN ISO 8434-4 Metallic tube connections for fluid power and general use Part
11、 4: 24 cone connectorswith O-ring weld-on nipples (ISO 8434-4 : 1995)3 Dimensions and designationThe design shown is for illustrative purposes only, but the dimensions of reducing adaptors shall be as speci-fied.Key to figure1a Pipe stud end1 Compression end as in DIN 38532 O-ring3 Port as in DIN EN
12、 ISO 8434-14 Ring and nut (pre-assembled) at manufacturers discretion5 Thread identical to thread of nut as in DIN EN ISO 8434-1*) Width across flats.Figure 1: Dimensions of reducing adaptor (notation)Designation of a reducing swivel adaptor with metric thread of size M12 (d1), light-duty series (L)
13、 made of steel(St), for a pipe outside diameter (d9) of 6 mm (6):Adaptor DIN 3946 L12 6 StPage 3DIN 3946 : 2002-04Table1:Dimensions of reducing adaptorsSeriesPipeoutsidediametersNominalpressure,in bar1)Compression end details(port as in DINENISO8434-1)L (light- duty)1)Applies only to steel adaptors
14、 (cf. DIN3859-1 for technical delivery conditions).2)Width across flats and values of mass given in brackets are optional.3)As specified in DINENISO8434-4 for series S6 to S12, L15 and L18 fittings.Width acrossflats2)d7i3d9d1ld6d10d12d1d9O-ringApprox.mass,in kg,per100 units3)Page 4DIN 3946 : 2002-04
15、4 MaterialsThe standard material of reducing swivel adaptors and nuts shall be steel, as specified in DIN 3859-1. Othermaterials specified in DIN 3859-1 shall be the subject of agreement, with the relevant symbol being includedin the designation.O-rings shall normally be made of acrylonitrile/butadi
16、ene rubber (NBR), with a hardness of (85 t 5) IRHD asspecified in DIN 53519-2, use of other materials being the subject of agreement.5 FinishThe standard finish shall be Fe/Zn8c2C as in DIN EN ISO 4042. Other types of finish (cf. DIN 3859-1) shall bethe subject of agreement, with the relevant symbol being included in the designation.6 Technical delivery conditionsThe technical delivery conditions specified in DIN 3859-1 shall apply.Other relevant standardDIN 2353 Compression fittings and couplings
