1、ICS 23.040.60Ltlose Rohrverschraubungen mit Schneidring Winkel-Einschraubstutzen mit kegeligem Einschraubgewinde(Nicht fr Neukonstruktionen)In keeping with current practice in standards published by the International Organization for Standardization(ISO), a comma has been used throughout as the deci
2、mal marker.ForewordThis standard has been prepared by Technical Committee Rohrverschraubungen of the NormenausschussRohrleitungen und Dampfkesselanlagen (Pipelines and Pressure Vessels Standards Committee).AmendmentsThis standard differs from the April 1984 edition in that it has been editorially re
3、vised and the specificationsfor surface roughness and finish have been amended.Previous editionDIN 3903: 1984-04.Ref. No. DIN 3903 : 2001-04English price group 05 Sales No. 010505.02DEUTSCHE NORM April 20013903Continued on pages 2 to 4. No part of this translation may be reproduced without the prior
4、 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).Taper stud elbows for use withcompression couplings(not to be used for new designs)Translation by DIN-Sprachendienst.In case of do
5、ubt, the German-language original should be consulted as the authoritative text.Supersedes April 1984 edition.All dimensions are in millimetres.1 ScopeThis standard specifies the design and dimensions of taper stud elbows with type W port as in DIN 3861, foruse in compression coupling assemblies.In
6、combination with fittings as in DIN EN ISO 8434-1, series L and S fittings as specified here areinterchangeable with DIN 3942 male stud elbows.NOTE: Tightness of the assembly cannot be guaranteed, since this is a function of the medium conveyed,the working pressure and temperature, and the combinati
7、on of materials used. Therefore, when designingcompression couplings as specified in this standard, use of a seal is recommended.Page 2DIN 3903 : 2001-042 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These normativereferences are
8、cited at the appropriate places in the text, and the titles of the publications are listed below. Fordated references, subsequent amendments to or revisions of any of these publications apply to this standardonly when incorporated in it by amendment or revision. For undated references, the latest ed
9、ition of thepublication referred to applies.DIN 158-1 Metric taper external and mating parallel internal screw threads Dimensions, tolerancesand inspectionDIN 3852-1 Stud ends and tapped holes with metric fine pitch thread, for use with compressioncouplings, valves and screw plugs DimensionsDIN 3852
10、-2 Stud ends and tapped holes with pipe thread, for use with compression couplings, valvesand screw plugs DimensionsDIN 3853 Compression ends for coupling nutsDIN 3858 Pipe threads for compression couplings Parallel internal threads and metric taperexternal threads Thread dimensionsDIN 3859-1 Compre
11、ssion fittings and couplings Technical delivery conditionsDIN 3861 Compression rings (ferrules) for use with compression couplings Design and type Wcompression ends (ports)DIN 3942 Compression fittings and couplings Swivel type male stud elbows with 24 cone andO-ring and with type W port as in DIN 3
12、861DIN 24312 Fluid power Pressure: concepts and characteristic valuesDIN 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)3 Dimensions and designationThe design
13、shown is for illustrative purposes only, but the dimensions of elbows shall be as specified.Type F (forged) Type P (made from tube)Key to figure1 Compression end as in DIN 38532 Type W port as in DIN 38613 Stud end as in DIN 3852-1 or DIN 3852-2Figure 1: Dimensions of taper stud elbow (notation)Desi
14、gnation of a taper stud elbow with stud end with metric thread (M), light duty series (L), made of steel (St),for a 12 mm pipe outside diameter (12):Elbow DIN 3903 L 12 M St132123Page 3DIN 3903 : 2001-04Designation of a taper stud elbow with stud end with pipe thread (R), extra-light duty series (LL
15、), made of steel(St), for an 8 mm pipe outside diameter (8):Elbow DIN 3903 LL 8 R StFor pipes with an outside diameter up to 12 mm, either type F or type P elbows will be supplied. If a particulartype is required, the symbol denoting the type shall be included in the designation.EXAMPLE:Designation
16、of a type F taper stud elbow (F) with stud end with metric thread (M), light duty series (L), madeof steel (St), for a 12 mm pipe outside diameter (12):Elbow DIN 3903 L 12 MF StTable 1: Dimensions of taper stud elbowsSeriesPipeNominalType C stud endCompression end detailsoutsidepressure(as in DIN 38
17、52-1 or DIN 3852-2)(type W port as in DIN 3861)diameter(as inDIN 24312)1)with metric thread with pipe thread(as in DIN 158-1) (as in DIN 3858)d2i2d2i2d7i42) d9LL4 M8 G180 1 keg 8 R 1/8 8M8G180 164(extra-light5100M8 G180 1 keg 8 R 1/8 8 M10 G180 165duty)6 M10 G180 1 keg 8 R 1/8 8 M10 G180 1668 M10 G1
18、80 1 keg 8 R 1/8 8 M12 G180 1786 M10 G180 1 keg 8 R 1/8 8 M12 G180 1,5 7 68 M12 G180 1,5 keg 12 R 1/4 12 M14 G180 1,5 7 8L10 250 M14 G180 1,5 keg 12 R 1/4 12 M16 G180 1,5 8 10(light duty)12 M16 G180 1,5 keg 12 R 3/8 12 M18 G180 1,5 8 1215 M18 G180 1,5 keg 12 R 1/2 12 M22 G180 1,5 9 1518 160 M22 G180
19、 1,5 keg 14 R 1/2 14 M26 G180 1,5 9 186 M12 G180 1,5 keg 12 R 1/4 12 M14 G180 1,5 9 68 M14 G180 1,5 keg 12 R 1/4 12 M16 G180 1,5 9 8S10400M16 G180 1,5 keg 12 R 3/8 12 M18 G180 1,5 9 10(heavy12 M18 G180 1,5 keg 12 R 3/8 12 M20 G180 1,5 9 12duty)14 M20 G180 1,5 keg 14 R 1/2 14 M22 G180 1,5 11 1416 M22
20、 G180 1,5 keg 14 R 1/2 14 M24 G180 1,5 11 161) Applies only to steel elbows (cf. DIN 3859-1 for technical delivery conditions).2) i4= i3 f, as in DIN 3853.(continued)Page 4DIN 3903 : 2001-04Table 1 (concluded)SeriesPipeWidth acrossApprox. mass,outsided10d11l1l2flats, s,in kg,diameterfor typeper 100
21、units,t 0,3 t 0,3 for typefor metric for pipethread threadLL 4 3 3,53)17 17 15 9 94) 1,2 1,5(extra- 5 3,5 3,53) 17 17 15 9 11 1,2 1,7light 6 4,5 4,5 17 17 15 9 11 1,3 1,7duty) 8 6 6 20 20 17 12 12 1,6 2,46 4 4 20 20 19 12 12 2,1 2,98 6 6 26 26 21 12 14 2,6 4,7L108 7 27 27 22 14 17 3,6 6,5(light 12 1
22、0 9 28 28 24 17 19 5,2 9,0duty) 15 12 11 32 34 28 19 9,0 18 15 14 36 36 31 24 12 6 4 4 26 26 23 12 14 3,8 5,48 5 5 27 27 24 14 17 4,8 7,6S107 7 28 28 25 17 19 6,5 10(heavy 12 8 8 28 28 29 17 22 7,8 13duty) 14 10 10 32 32 30 19 10 16 12 12 32 32 33 24 12 3) For LL series, 4 mm pipe thread.4) 11 mm fo
23、r pipe thread.4 MaterialsThe standard material of taper stud elbows shall be steel as specified in DIN 3859-1. Other materials specifiedin DIN 3859-1 shall be the subject of agreement, with the relevant symbol being included in the designation.5 FinishThe standard finish shall be Fe/Zn 8c2C 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.F P F P
