1、ICS 71.120.10Stutzen aus unlegiertem Stahl, PN 10 bis PN 40In keeping with current practice in standards published by the International Organization for Standardization(ISO), a comma has been used throughout as the decimal marker.Ref. No. DIN 28115 : 2003-02English price group 07 Sales No. 010702.04
2、DEUTSCHE NORM February 200328115Continued on pages 2 to 5. 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 German Standards (DIN-Normen).PN 10 to
3、PN 40 carbon steel nozzles for vesselsin process engineering applicationsTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.Supersedes DIN 28115,April 1981 edition.ForewordThis standard has been prepared by the Normenausschu
4、ss Chemischer Apparatebau (Process EngineeringStandards Committee).AmendmentsThis standard differs from the April 1981 edition in that it has been revised in form and substance,harmonizing it with the specifications of DIN EN 1092-1.Previous editionsDIN 28115-1: 1958-03; DIN 28115-2: 1958-03; DIN 28
5、115: 1971-07, 1981-04.All dimensions are in millimetres.1 ScopeThis standard specifies dimensions of carbon steel nozzles for vessels in process engineering applications,for use at nominal pressures of 10 bar to 40 bar and operating temperatures as specified in table 1. Thedimensions are specified t
6、o agree with DIN EN 1092-1.See DIN 28025 for stainless steel nozzles and Explanatory notes for design assumptions.2 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the
7、text and the titles of the publications are listedbelow. For dated references, subsequent amendments to or revisions of any of these publications apply tothis standard only when incorporated in it by amendment or revision. For undated references, the latestedition of the publication referred to appl
8、ies.DIN 28025 PN 10 to PN 40 stainless steel nozzles for vessels in process engineering applicationsDIN EN 1092-1 Flanges and their joints Circular flanges for pipes, valves, fittings and accessories Part 1: Steel flanges, PN designatedDIN EN 1591-1 Flanges and their joints Design rules for gasketed
9、 circular flange connections Part 1:Calculation methodDIN EN 10204 Inspection documents for metallic products (includes Amendment A1 : 1995)DIN EN 10220 Seamless and welded steel tubes Dimensions and masses per unit lengthDIN EN 29692 Metal-arc welding with covered electrode, gas-shielded metal-arc
10、welding and gaswelding Joint preparation for steel (ISO 9692 : 1992)Page 2DIN 28115 : 2003-02ISO 2768-1:1989 General tolerances Part 1: Tolerances for linear and angular dimensions without individualtolerance indicationsAD-Merkblatt (AD Code of practice) B 08 Flansche (Flanges)AD-Merkbltter, series
11、W1)3 Pressure/temperature ratings, dimensions and designation3.1 Pressure/temperature ratingsThe pressure/temperature ratings given in table 1 are based on the design assumptions made in the Explanatorynotes.Table 1: Pressure/temperature ratingsPressure ratingMaximal allowable pressure1) at an opera
12、ting temperature, in C, PNequal to ambientup to 150 up to 200temperature10 10 17,5 16,916 16 11,9 11,025 25 18,7 17,240 40 29,9 27,61) Gauge pressure.3.2 DimensionsNozzles shall have dimensions as specified in table 3.General tolerances shall be class mk tolerances as in ISO 2768-1 for the nozzle le
13、ngth and for flanges asspecified in DIN EN 1092-1.See DIN EN 1092-1 for information on surface roughness of flanges and flange facings (any other agreementon surface roughness may be made, depending on the service conditions).Table 2: New and old flange facing designationsDesignation as in DIN EN 10
14、92-1 Old designationForm D Form NForm B11) Form C1) For flanges designed for use with nozzles rated for pressures up to 40 bar, type B1 facings and for thoserated for pressures of 63 bar and higher, type B2 facings shall be used (unless otherwise specified).1) Obtainable from Beuth Verlag GmbH, Burg
15、grafenstrae 6, 10787 Berlin, Germany.Page 3DIN 28115 : 2003-02Weld preparation as in DIN EN 29692, ref. no. 1.3 or 1.5.Key:1 Weld-neck flange (type 11) as in DIN EN 1092-12 Tube as in DIN EN 10220No specification is made for l, which depends on the vessel design.Figure 1: Type B1 nozzle (standard de
16、sign)3.3 DesignationDesignation of a nozzle with type B1 facing (B1), of size DN 100 (100), with the flange made of carbon steel ofgrade S235JRG2 (material number 1.0038), tube made of grade P235TR1 (material number 1.0254) steel andrated for a pressure of 16 bar (PN 16):Nozzle DIN 28115 B1 100 PN 1
17、6 1.0038/1.0254Designation of a nozzle with type D facing (D), of size DN 100 (100), with the flange made of carbon steel of gradeS235JRG2 (material number 1.0038), tube made of grade P235TR1 (material number 1.0254) steel and ratedfor a pressure of 16 bar (PN 16):Nozzle DIN 28115 D 100 PN 16 1.0038
18、/1.02544 MaterialsProof of the suitability of materials shall be furnished by producing an inspection document as in DIN EN 10204,with the type of document as specified in the AD-Merkbltter of series W.Page 4DIN 28115 : 2003-02Table 3: Nozzle dimensionsPage 5DIN 28115 : 2003-02Explanatory notesIt sh
19、ould be noted that the pressure/temperature ratings in the table are for guidance only. Since the tightnessof flanged joints is vital to the joint performance and given the inaccuracy involved in bolt tightening, a flangedassembly is to be analysed in each particular case.The design of nozzles as sp
20、ecified in this standard is based on DIN EN 1591-1, assuming the following:a) the internal pressure increases by 10 % in service (if nozzles are exposed to external loads, separateanalysis is to be made);b) the flange thickness values are based on the characteristics of expanded graphite gaskets;c)
21、the rectangularity of flange faces is as specified in AD-Merkblatt B 8;d) the characteristics for flange materials are those specified in the relevant AD-Merkbltter of series W;e) the bolts used are of property class 5.6;f) the maximum permissible temperature is utilized;g) the scatter involved in bolt tightening is 30 %.The strength of reinforcement of vessel openings shall be analysed on a case-by-case basis.It should be noted that bolt tightening may cause local plastic deformation which is, however, limited by theassembly relaxing.
