SIST EN 13445-3:2002/A17:2008
(Amendment)Unfired pressure vessels - Part 3: Design
Unfired pressure vessels - Part 3: Design
Complex editorial changes to the layout of Annex J of this standard.
Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Récipients sous pression non soumis a la flamme - Partie 3 : Conception
Neogrevane tlačne posode - 3. del: Konstruiranje
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13445-3:2002/A17:2008
01-januar-2008
1HRJUHYDQHWODþQHSRVRGHGHO .RQVWUXLUDQMH
Unfired pressure vessels - Part 3: Design
Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Récipients sous pression non soumis a la flamme - Partie 3 : Conception
Ta slovenski standard je istoveten z: EN 13445-3:2002/A17:2007
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
SIST EN 13445-3:2002/A17:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 13445-3:2002/A17
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2007
ICS 23.020.30
English Version
Unfired pressure vessels - Part 3: Design
Récipients sous pression non soumis à la flamme - Partie 3 Unbefeuerte Druckbehälter - Teil 3: Konstruktion
: Conception
This amendment A17 modifies the European Standard EN 13445-3:2002; it was approved by CEN on 26 May 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2002/A17:2007: E
worldwide for CEN national Members.
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EN 13445-3:2002/A17:2007 (E)
Contents Page
Foreword.3
Annex J (normative) Alternative method for the design of heat exchanger tube sheets.4
J.3 Specific symbols and abbreviations .4
J.3.3 Symbols .4
J.5 Parameters for all types .5
J.5.1 Diameters and widths.5
2
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EN 13445-3:2002/A17:2007 (E)
Foreword
This document (EN 13445-3:2002/A17:2007) has been prepared by Technical Committee CEN/TC 54
“Unfired pressure vessels”, the secretariat of which is held by BSI.
This Amendment to the European Standard EN 13445-3:2002 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by April 2008, and conflicting national
standards shall be withdrawn at the latest by April 2008.
The document includes the text of the amendment itself. The corrected pages of EN 13445-3 will be delivered
as issue 29 of the standard.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
3
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EN 13445-3:2002/A17:2007 (E)
Annex J
(normative)
Alternative method for the design of heat exchanger tube sheets
J.3 Specific symbols and abbreviations
Change the following symbols in Annex J.3.3:
J.3.3 Symbols
Add the following symbols:
2
A is the minimum area of the tubed region, [mm ], see J.5.1.1.3.2;
R()min
d is the average of d and d , [mm], see J.5.1.1.4;
1()av 1()min 1()max
d is the maximum value of d , [mm], see J.5.1.1.2;
1()max 1
d is the minimum value of d , [mm], see J.5.1.1.3;
1()min 1
j is an integer to identify any trapezoidal area (tubed or untubed);
k is an integer to identify an untubed (pass partition) zone;
N is the number of potential extra tubes in a given untubed trapezoidal area, [1], see J.5.1.1.3.2;
I()k
N is the number of potential extra tubes in a given row, [1], see J.5.1.1.3.2;
I()r
p is the tube pitch in relation to the height of the trapezoidal area, [mm];
b
p is the tube pitch in relation to the width of the trapezoidal area, [mm];
c
r is an integer to identify a tube row;
∆d is the actual difference between d and d , [mm];
()act 1()max 1()min
∆d is the allowable difference between d and d , [mm];
()all 1()max 1()min
4
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EN 13445-3:2002/A17:2007 (E)
Replace the following symbols:
N is the total minimum number of potential extra tubes for the whole tubed area, [1], see
I()min
J.5.1.1.3.2;
r is the radius of the outermost tube hole centre [mm]; see Figure J-7(a) and NOTE in J.5.1.1.2
o
(also Figure 13.7-1);
Delete the following symbol:
θ is a factor dependant on the tube pitch [1]; see J.5.1.
J.5 Parameters for all types
J.5.1 Diameters and widths
Replace 5.1.1 with the following text:
J.5.1.1 Outside diameter d of tubed region
1
J.5.1.1.1 General
The procedure for calculating d is given below.
1
NOTE Upper and lower limits for d can be established by considering the space within the tubed area which is
1
available for additional tubes. d is calculated from the limits.
1
J.5.1.1.2 Maximum diameter d
1()max
Determine d as follows:
1()max
d = 2r + d (J.5.1-1)
1()max o T
NOTE If an isolated tube or small group of tubes lies outside the main tubed region (by a distance of more than one
pitch) it should be ignored when determining r and d .
T
o
J.5.1.1.3 Minimum diameter d
1()min
J.5.1.1.3.1 Defining trapezoidal areas
Draw the tangent lines to the outside tubes to enclose the tubed region within a polygon. The positions of the
tie rods shall be ignored.
NOTE 1 An example is shown in Figures J-7(c) and J-7(d).
NOTE 2 For simplicity, where two tangent lines have nearly equal slopes, they can be replaced by a single tangent line
if this line lies outside the centres of any tubes it crosses (i.e. it cuts less than half tube sections). (See area of height b in
7
Figure J-7(b).)
Divide the tubed region into (perforated or un-perforated) trapezoidal areas by drawing straight lines parallel to
the
...
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