1、December 2007DEUTSCHE NORM English price group 21No part of this standard 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 91.140.10; 91.140.60!
2、$Jw|“1398489www.din.deDDIN EN 13831Closed expansion vessels with built in diaphragm for installation inwaterEnglish version of DIN EN 13831:2007-12Ausdehnungsgefe mit eingebauter Membrane fr den Einbau in WassersystemenEnglische Fassung DIN EN 13831:2007-12www.beuth.deTogether with DIN EN 12828:2003
3、-06 supersedes DIN 4807-2:1991-05 supersedes DIN 4807-3:1993-10 Document comprises 62 pagesDIN EN 13831:2007-12 2 National foreword This standard has been prepared by Technical Committee CEN/TC 54 “Unfired pressure vessels” (Secretariat: BSI, United Kingdom). The responsible German body involved in
4、its preparation was the Normenausschuss Chemischer Apparatebau (Process Engineering Standards Committee), Technical Committee FNCA GA 54. In addition to the legal units of measurement, this standard also uses the unit “inch”. It is important to note that according to the German law on units in metro
5、logy, the use of the unit “inch” is not permitted in official or business communications within Germany. 1 Zoll (inch) = 25,4 mm The DIN Standard corresponding to the International Standard referred to in the EN is as follows: ISO 898-2:1992 DIN EN 20898-2:1994-02 Amendments This standard differs fr
6、om DIN 4807-2:1991-05 and DIN 4807-3:1993-10 as follows: a) Steel groups as defined in DIN EN 13445-2 are now included. b) Design and calculation methods are in accordance with DIN EN 13445-3. c) The manufacturing method is in accordance with DIN EN 13445-4. d) The testing method is in accordance wi
7、th DIN EN 13445-5. e) Reference is made to DIN EN 1708-1 regarding recommended weld details; the suitability of other weld details is to be proven as specified. f) Requirements for closed expansion vessels with built-in diaphragm are now included. g) Requirements for and testing of diaphragms are no
8、w included. Previous editions DIN 4806: 1953-09 DIN 4807-1: 1980-03 DIN 4807-2: 1991-05 DIN 4807-3: 1986-04, 1993-10 National Annex NA (informative) Bibliography DIN EN 20898-2:1994-02, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread (ISO 898-2:1992) EU
9、ROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13831August 2007ICS 91.140.10English VersionClosed expansion vessels with built in diaphragm for installationin waterVases dexpansion ferms avec membrane incorpore pourinstallation dans des systmes eauAusdehnungsgefe mit eingebauter Membrane fr denEinb
10、au in WassersystemenThis European Standard was approved by CEN on 26 July 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibl
11、iographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of
12、 a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland,
13、 Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-10
14、50 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13831:2007: EEN 13831:2007 (E) 2 Contents Page Foreword4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and conditions .7 4 Symbols and units.9 5 Materials
15、.10 5.1 General10 5.2 Materials proven by experience and current use.10 5.3 Fasteners 11 5.4 Non-pressurised parts 11 6 Design and calculation11 6.1 Design .11 6.1.1 Requirements pertaining to the diaphragm 11 6.1.2 Requirements pertaining to fresh water application11 6.1.3 Outside finish.11 6.1.4 I
16、nspection openings11 6.1.5 Connections .12 6.1.6 Clenched joints 12 6.1.7 Volume tolerance of vessels 12 6.1.8 Fatigue 12 6.1.9 Loadings .13 6.2 Experimental design method13 6.2.1 General13 6.2.2 Preparations .13 6.2.3 Vessels with PS V 1 000 bar L 13 6.2.4 Vessels with 1 000 bar L 0,005 Di(if this
17、condition is not fulfilled, e has to be checked additionally for plastic buckling. See EN 134453 f) R DeEN 13831:2007 (E) 17 The required thickness e is the greater of the following values ( )fD,R,pei+=20750(6) p,zfRpe502 = (7) Figure 2 Torispherical end design (factor ) 6.3.4.5 Ellipsoidal ends An
18、ellipsoidal end is made on a truly ellipsoidal former. These rules apply only to ends for which 1,7 6,3 mm, (bois the basic gasket or joint seating width = w / 2 with the exception of the ring-joint for which bo = w / 8) mm d diameter of an opening mm dinozzle inside diameter mm denozzle outside dia
19、meter mm Diinside diameter of the cylindrical shell / pipe / opening to which the end is bolted mm C diameter of the bolt circle mm G mean diameter of gasket mm e minimum required wall thickness of the end mm EN 13831:2007 (E) 26 ebminimum required wall thickness of nozzle under internal pressure mm
20、 eominimum required wall thickness of end without opening mm e1minimum required wall thickness for the peripheral area of the end mm f nominal design stress of end material at temperature MPa fambnominal design stress of end material at room temperature MPa Wamb total tensile force of bolts for the
21、gasket seating condition N k distance between centre lines of two adjacent openings mm m tightening coefficient of gasket (Table 1) ea,banalysis thickness of external section of a nozzle mm ea,banalysis thickness of the internal protrusion of a nozzle mm fbnominal design stress at calculation temper
22、ature of the nozzle MPa l external length of a nozzle effective for reinforcement mm l internal length on a protruding nozzle effective for reinforcement mm w contact width of gasket, as limited by gasket width and flange facing mm Y2calculation coefficient of opening reinforcement y gasket seating
23、pressure (Table 1) N/mm26.3.6.3 Unstayed flat circular bolted ends without openings 6.3.6.3.1 General These design rules relate to the following ends: gaskets entirely within the bolt circle (narrow-face); gaskets on both sides of the bolt circle (full-face). The ends may or may not be of uniform th
24、ickness. However the minimum required wall thickness has to be extended to the entire surface located inside the gasket. EN 13831:2007 (E) 27 6.3.6.3.2 Circular ends with gasket entirely within the bolt circle a) plane face c) tongue joint b) raised face d) groove joint Figure 9 Bolted circular flat
25、 ends with gasket entirely within the bolt circle The minimum required wall thickness e for the end is the greater value calculated from Equations (41) and (42) respectively. For the gasket seating condition: ambambA3fGWG)(Ce= (41) For each pressure condition: ()fpGCmbGG,e += 2433102p(42)Wamb is giv
26、en by the following equation: yGbW = amb (43) The minimum required wall thickness e1for the peripheral area end is given by Equation (41) or the following for each pressure condition whichever is greater. EN 13831:2007 (E) 28 ()fpGCmbGe += 243p1 (44) 6.3.6.3.3 Circular ends with gasket on both sides
27、 of the bolt circle (full faced gasket flange) Figure 10 Bolted circular flat end with a gasket on both sides of the bolts The minimum required wall thickness for the end is given by the following equation: fpC,e = 410 (45) The minimum required wall thickness for the peripheral area of the end is given by: e1= 0,8 e (46) The reduced thickness of the flanged extension shall be limited to a crown area whose internal circumference is not smaller than 0,7 C.
