1、DEUTSCHE NORM SeDtember 2000 DIN - Seamless steel tubes subjected to dynamic loading I 2445-1 I Part 1 : Hot finished tubis for use in fluid power systems, rated for messures from 1 O0 bar to 500 bar ICs 23.100.40 Supersedes November 1974 edition. Nahtlose Stahlrohre fr schwellende Beanspruchungen -
2、Teil 1 : Warmgefertigte Rohre fr hydraulische Anlagen, 1 O0 bar bis 500 bar In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has been prepared by the Arb
3、eitsausschuss Rohrverschraubungen (Technical Committee on Compression Couplings). See Supplement 1 to this standard for design principles. Products as in this edition are compatible with products in accordance with the previous edition. Amendments This standard differs from the November 1974 edition
4、 as follows. a) The standard now covers tubes rated for 1 O0 bar to 500 bar. b) There is no longer a differentiation between water-based and oil-based fluid power systems, and dimensions have been specified for a pressure surge of 60 bar in all cases. c) Dimensions are specified for two load cases i
5、nvolving different stress amplitudes. d) Design calculations were based on DIN 2413-1. e) The standard has been editorially revised. Previous edition DIN 2445-1 : 1974-1 1. 1 Scope This standard specifies requirements for hot finished seamless straight steel tubes which are subjected to dynamic load
6、ing. Such tubes are primarily used in high-pressure fluid power systems rated for pressures up to 500 bar. Outside diameters and wall thicknesses have been taken from DIN V ENV 10220, and are identical to those in DIN 2448. Tubes in accordance with tables 1 and 2 of this standard are designed to res
7、ist plastic deformation and fatigue failure, as is specified for load case III in DIN 2413-1 (see Supplement 1 to DIN 2445 for design details). Continued on pages 2 and 3. Translation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text.
8、 No pari of this translation may be reproduced without the prior permission of hiDeutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN 2445-1 : 2000-0 English price group 05 Sales No. 0105
9、12.00 Page 2 DIN 2445-1 : 2000-09 219,l 14,2 - - 22,2 - 28,O 273,O 20,o - 323,9 - 355,6 - - - 28,O - 30,O - 2 Normative references This standard incorporates, by dated or undated reference, provisionsfrom other publications. These normative references are cited at the appropriate places in the text,
10、 and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to appli
11、es. DIN 1630 High performance seamless circular unalloyed steel tubes -Technical delivery conditions DIN 241 3-1 Design of steel pressure pipes Supplement 1 to DIN 2445 Seamless steel tubes subjected to dynamic loading - Design principles DIN 2448 Seamless steel pipes and tubes - Dimensions and mass
12、 per unit length DIN EN 10204 Metallic products - Types of inspection document (includes Amendment Al : 1995) DIN V ENV 10220 Seamless and welded steel tubes - Dimensions and masses per unit length 28,O 32,2 - 40,l - - - - 3 Designation Designation of a DIN 2448 seamless steel tube, of 88,9 mm outsi
13、de diameter and 11 mm wall thickness, which meets the requirements specified in DIN 1630, is of grade St 52.4 steel (material number 1.0581) in the normalized condition (NBK), and is accompanied by an inspection certificate 3.1 b as in DIN EN 10204: Tube DIN 2448 - 88.9 X 11 - DIN 1630 - 1 .O581 NBK
14、 - 3.1 b 4 Dimensions Dimensions shall be as given in tables 1 and 2, which include only recommended sizes that are compatible with standard connections. Page 3 DIN 2445-1 : 2000-09 177,8 193,7 219.1 - - - 25,O - 44,6 - - 40,l 48,6 - - 22.2 - - 54.9 69.8 - 273,O 323,9 355,6 5 Material and technical
15、delivery conditions Tubes shall be of grade St 52.4 steel (material number 1.0581) as in DIN 1630. They shall be accompanied by an inspection certificate 3.1 b as in DIN EN 10204. - - 68,4 - - 28,O - - 63,6 - 69,8 - - - - - - - - Explanatory notes The tubes specified here are standard tubes often us
16、ed in fluid power systems. The rated pressures and tube dimensionsgiven are those used in systems subjected to the most common service conditions. For other service conditions, the design principles described in Supplement 1 to this standard are to be used to determine the appropriate dimensions, for instance, for a higher PN value. The usual allowances are to be made when designing bends.
