EN 13445-3:2002/A8:2006

SLOVENSKI STANDARD
01-oktober-2006
1HRJUHYDQHWODþQHSRVRGH±GHO.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/A8:2006
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13445-3:2002/A8
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
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: Konstruktion
3: Conception
This amendment A8 modifies the European Standard EN 13445-3:2002; it was approved by CEN on 26 October 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, 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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2002/A8:2006: E
worldwide for CEN national Members.

Contents Page
Foreword .3
21 Design Rules For Reinforced Flat Walls .4
21.1 General .4
21.2 Stayed Flat Walls .4
21.3 Specific Definitions for Stayed Flat Walls.4
21.4 Required Thickness of Stayed Flat Walls .4
21.5 Required Dimensions and Layout of Staybolts and Stays .4
21.6 Requirements For Threaded Staybolts .5
21.7 Requirements For Welded-in Staybolts And Welded Stays .5
21.8 Tables for Stayed Flat Walls .6
21.9 Figures for Stayed Flat Walls.7
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC .10

Foreword
This European Standard (EN 13445-3:2002/A8:2006) 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 October 2006, and conflicting
national standards shall be withdrawn at the latest by October 2006.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
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, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
The document includes the text of the amendment itself. The corrected pages of EN 13445-3 will be delivered
as issue 19 of the standard.
Insert a new clause 21:
21 Design Rules For Reinforced Flat Walls
21.1 General
Flat walls may be reinforced either by stays and staybolts, which are intended to take a fraction of the
pressure load acting on the wall (Stayed Flat Walls), or by stiffeners welded to the same in order to increase
their section modulus and their moment of inertia (Stiffened Flat Walls).
21.2 Stayed Flat Walls
Design requirements for stayed flat walls are provided in sub-clauses 21.1 to 21.8. Requirements for the plate
thickness and requirements for the staybolt or stay geometry including size, pitch, and attachment details are
provided.
21.3 Specific Definitions for Stayed Flat Walls
C     is the stress factor for braced and stayed surfaces (see Table 21.8-1).

p  is the maximum pitch. The maximum pitch is the greatest distance between any set of parallel straight
lines passing through the centres of staybolts in adjacent rows. Each of the three parallel sets running
in the horizontal, the vertical, and the inclined planes shall be considered.

21.4 Required Thickness of Stayed Flat Walls
21.4.1 The minimum thickness for stayed flat walls and those parts that, by these rules, require staying as flat
plates with braces or staybolts of uniform diameter symmetrically spaced, shall be calculated by the following
equation.
P
e = p                                    (21.4.1)
fC
21.
...