EN 13445-3:2002/A4:2005
(Amendment)Unfired pressure vessels - Part 3: Design
Unfired pressure vessels - Part 3: Design
Reinforced and toroidal bellows.
Reinforced and toroidal bellows in fixed tubesheet Heat Exchangers (only bellows having flat walls are considered now in Clause 14)
Unbefeuerte Druckbehälter - Teil 3: Konstruction
Récipients sous pression non soumis à la flamme - Partie 3: Conception
Neogrevane tlačne posode – 3. del: Konstruiranje
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13445-3:2002/A4:2005
01-november-2005
1HRJUHYDQHWODþQHSRVRGH±GHO .RQVWUXLUDQMH
Unfired pressure vessels - Part 3: Design
Unbefeuerte Druckbehälter - Teil 3: Konstruction
Récipients sous pression non soumis a la flamme - Partie 3: Conception
Ta slovenski standard je istoveten z: EN 13445-3:2002/A4:2005
ICS:
23.020.30
SIST EN 13445-3:2002/A4:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 13445-3:2002/A4
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2005
ICS 23.020.30
English Version
Unfired pressure vessels - Part 3: Design
Récipients sous pression non soumis à la flamme - Partie Unbefeuerte Druckbehälter - Teil 3: Konstruction
3: Conception
This amendment A4 modifies the European Standard EN 13445-3:2002; it was approved by CEN on 14 April 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2002/A4:2005: E
worldwide for CEN national Members.
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EN 13445-3:2002/A4:2005 (E)
Foreword
This document (EN 13445-3:2002/A4:2005) 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 January 2006, and conflicting
national standards shall be withdrawn at the latest by January 2006.
This amendment, relative to Clause 14, is based on EN 13445-3:2002 up to Issue 11 (May 2004).
The document includes the text of the amendment itself. The corrected pages of EN 13445-3 will be delivered
as issue xx 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, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
2
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EN 13445-3:2002/A4:2005 (E)
14 Expansion bellows
14.1 Purpose
Add at the end of the first sentence (after c):
subject to internal or external pressure and cyclic displacement.
Delete Note 1.
Rename Note 2 as Note.
Add the following paragraph at the end of the subclause:
If erosion or vibration is considered to be a concern due to the velocity of the medium conveyed, the use of an
internal sleeve should be considered.
14.2.5 Squirm
Replace the complete subclause by the following:
14.2.5 Reinforcing and equalizing rings
Devices that are tightly fitted into the roots of the convolutions in order to reinforce the bellows against internal
pressure.
Reinforcing rings are fabricated from tubing or round bars. Equalizing rings are approximately "T" shaped in
cross section and their primary purpose is to limit the total equivalent axial displacement range.
Figure 14.1-1c)
Replace by the following:
1
q
2
e
c
D
m
L
w
e
D
i
Key
(1) convolution
(2) reinforcing collar
c) Toroidal bellows
Figure 14.1-1 — Three types of expansion bellows
3
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EN 13445-3:2002/A4:2005 (E)
14.3 Specific symbols and abbreviations
Replace the description of E by the following:
o
E is the modulus of elasticity of bellows material at room temperature;
o
Replace the description of K by the following:
b
K is the bellows axial rigidity, given by equations (14.5.7-1, 14.6.8-1 or 14.7.8-1);
b
Add the following symbols in alphabetical order:
...
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