1、May 2013 Translation by DIN-Sprachendienst.English price group 6No 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).ICS 21.
2、060.20!%c“2046491www.din.deDDIN 431Pipe nuts with thread according to DIN EN ISO 228-1,English translation of DIN 431:2013-05Rohrmuttern mit Rohrgewinde nach DIN EN ISO 228-1,Englische bersetzung von DIN 431:2013-05crous de tube avec filetage selon DIN EN ISO 228-1,Traduction anglaise de DIN 431:201
3、3-05SupersedesDIN 431:2000-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 8 pages08.13 DIN 431:2013-05 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Dimensions 5 4 Techni
4、cal delivery conditions . 7 5 Designation . 8 DIN 431:2013-05 3 Foreword This standard has been prepared by Working Committee NA 067-00-03 AA Verbindungselemente mit metri-schem Innengewinde of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee). The DIN 4000-161-1 ta
5、bular layout of product properties applies to pipe nuts covered by this standard. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. Amendments This sta
6、ndard differs from DIN 431:2000-10 as follows: a) normative references have been updated; b) Table 2 has been harmonized with the table for ISO product standards; c) in Table 1, the number of positions after the decimal comma has been harmonized; d) symbol d has been changed to D to comply with DIN
7、EN ISO 228-1; e) property class 50 for stainless steel is no longer included; f) value sminhas been corrected for G 3/4. Previous editions DIN 431: 1926-01, 1929-04, 1949xx-06, 1970-02, 1972-12, 1982-11, 2000-02, 2000-10 DIN 431:2013-05 4 1 Scope This standard specifies requirements for size G 1/8 t
8、o G 6 (hexagon and octagon) pipe nuts with thread as in DIN EN ISO 228-1 and of product grades B and C. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispens-able for its application. For dated references, only the edition
9、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 267-2, Fasteners Technical delivery conditions Design and dimensional accuracy DIN 267-24, Fasteners Technical delivery conditions Part 24: Hardness classes for nuts without s
10、peci-fied proof load values DIN 4000-161, Tabular layout of product properties Part 161: Fasteners with internal thread DIN EN 10242, Threaded pipe fittings in malleable cast iron DIN EN 28839, Mechanical properties of fasteners Nonferrous metal bolts, screws, studs and nuts DIN EN ISO 225, Fastener
11、s Bolts, screws, studs and nuts Symbols and descriptions of dimensions DIN EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimen-sions, tolerances and designation DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-2, Mechanical properties of c
12、orrosion-resistant stainless steel fasteners Part 2: Nuts DIN EN ISO 4042, Fasteners Electroplated coatings DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 6157-2, Fasteners Surface discontinuities Part 2: Nuts DIN EN ISO 10683,
13、Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 10684, Fasteners Hot dip galvanized coatings DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN 431:2013-05 5 3 Dimensions For dimensions see Figure 1 and Table 1. Symbols and their descriptions are
14、 specified in DIN EN ISO 225. Type A Type B For sizes G 1/8 to G 4 For sizes G 5 and G 6 Other dimensions as for type A Figure 1 Pipe nuts (types A and B) (notation) DIN 431:2013-05 6 Table 1 Dimensions Dimensions in millimetres Thread size (D) dadwe m s Nominal size max. min. min. min. max.amax. =
15、nominal size min. G 1/8 10,5 16,5 19,85 6 6,48 18b17,57 cG 1/4 14,2 19,1 22,78 6 6,48 21b20,16 cG 3/8 18,0 24,8 29,56 7 7,58 27 26,16 26,1 G 1/2 22,6 31,3 37,29 8 8,58 34b33,00 c(G 5/8) 24,7 31,3 37,29 8 8,58 34b33,00 cG 3/4 28,6 32,3 39,55 9 9,58 36 35,00 43,6 (G 7/8) 32,6 38,0 45,20 9 9,58 41 40,0
16、0 54,0 G 1 35,6 42,8 50,85 10 10,58 46 45,00 81,3 (G 1 1/8) 40,9 46,5 55,37 10 10,58 50 49,00 95 G 1 1/4 45,3 51,1 60,79 11 11,70 55 53,80 117 G 1 1/2 51,6 55,9 66,44 12 12,70 60 58,80 134 (G 1 3/4) 58,0 64,7 76,93 13 13,70 70 68,10 213 G 2 64,4 69,4 82,60 13 13,70 75 73,10 277 (G 2 1/4) 71,0 78,7 9
17、3,56 16 16,70 85 82,80 378 G 2 1/2 81,2 88,2 104,86 16 16,70 95 92,80 449 G 3 94,9 97,7 116,16 19 19,84 105 102,80 554 G 4 122,0 125,9 149,72 22 22,84 135 132,50 1 040 G 5 149,5 154,4 183,06 22 22,84 165 162,50 1 330 G 6 177,0 176,1 209,50 25 25,84 190 185,40 1 850 Bracketed sizes should be avoided
18、if possible. aThe maximum size applies for type B pipe nuts only. For type A pipe nuts, m is to be larger by a machining allow-ance. bThe width across flats shall be added to the designation, see Clause 5. cMass values for pipe nuts with the new widths across flats are currently not available. Mass
19、( = 7,85 kg/dm3) kg per 1 000 units DIN 431:2013-05 7 4 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel Stainless steel Nonferrous metal General re-quirements Standard DIN ISO 8992 Thread size Standard DIN EN ISO 228-1 Mechanical properties Hardness cl
20、ass/ Steel propertya14H A2 Materials as in DIN EN 28839 Standards DIN 267-24 DIN EN ISO 3506-2 Product grade B for type B C for type A Standard DIN EN ISO 4759-1 Surface finish Coating As processed. Plain Plain DIN EN ISO 4042 applies with regard to electroplating. DIN EN ISO 4042 applies with regar
21、d to electroplating. DIN EN ISO 10683 applies with regard to non-electrolytically applied zinc flake coatings. DIN EN ISO 10684 applies with regard to hot dip galvanizing. DIN 267-2 applies with regard to surface roughness. Additional requirements or other surface finishes or coatings shall be subje
22、ct to agreement between the supplier and the customer. Surface dicontinuities DIN EN ISO 6157-2 applies to tolerances for surface discon-tinuties. Acceptance inspection DIN EN ISO 3269 applies with regard to acceptance inspection. aWhere nuts are to be made of other materials (except for malleable i
23、ron) or of other property classes, these shall be selected based on the relevant standards. For pipe nuts made of malleable iron DIN EN 10242 applies. Limit deviations, geometrical tolerances DIN 431:2013-05 8 5 Designation Designation of a size G1 pipe nut of type A, assigned to hardness class 14H: Pipe nut DIN 431 A G 1 14H The designation of sizes G 1/8, G 1/4, G 1/2 and G 5/8 pipe nuts shall also include the width across flats (SW), e.g. SW34 for size G 1/2: Pipe nut DIN 431 A G 1/2 SW34 14H Designation of a size G1 pipe nut of type A and made of A2 steel: Pipe nut DIN 431 A G 1/2 A2
