Flanges and their joints - Pipework ponents Definition and selection of PN
Nationalforeword
This British Standard is the official English language version of EN 1333:2006. It supersedes BS EN 1333:1997 which is withdrawn.
The UK participation in its preparation was entrusted to Technical CommitteePSE/15 Flanges which has the responsibility to:
aid enquirers to understand the text;present to the responsible international/European mittee any enquiries on the interpretation or proposals for change and keep UKinterests informed;promulgate them in the UK. monitor related international and European developments and
A list of organizations represented on this mittee can be obtained on request to its secretary.
Cross-references
The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence Index or by using the “Search" facility of the BSI Electronic Catalogue or of BritishStandards Online.
This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
Compliance with a British Standard does not ofitself confer immunityfrom legal obligations.
Summary of pages
This document prises a front cover an inside front cover the EN title page pages 2 and 3 and a back cover.
The BSI copyright notice displayed in this document indicates when thedocument was last issued.
This British Standard waspublished under the authority of the Standards Policy andStrategy Commitee on 28 April 2006
Amendments issued since publication
Amd. No. Date Comments
BSI 2006
ISBN 0 580 48174 3
EN1333
Supersedes EN 1333:1996
English Version
Flanges and theirjoints-Pipework ponents-Definition and selectionofPN
Flansche und ihre Verbindungen - Rohrleitungsteile -Definition und Auswahl von PN
Brides et leurs assemblages - Composants de resesux detuyauteries Definition et selection des PN
This European Standard was approved by CEN on 23 January 2006.
CEN members are bound to ply with the CEN/CENELEC Infternal Regulations which stipulatethe conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-datelists and bibliographical references concening such national standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (Engish French German). A version in any other language made by translationunder the responsibilityof a CEN member into is own language and notifed 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 lceland Ireland taly Latvia Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Switzerland and United Kingdom.
Management Centre: rue de Stassart 36 B-1050 Brussels
Foreword
This document (EN 1333:2006) has been prepared by Technical Committee CEN/TC 74 *Flanges and theirjoints* the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard either by publication of an identicaldrawn at the latest by September 2006.
This document supersedes EN 1333:1996.
This document is based on the international standard ISO 7268:1983 but the misleading definition of rnominal pressure" has been omitted as it is so loosely related to the maximum allowable pressure.
According to the CEN/CENELEC Internal Regulations the national standards organizations of the followingmark Estonia Finland France Germany Greece Hungary lceland Ireland Italy Latvia Lithuania Luxem- bourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Switzer-land and United Kingdom.
1Scope
specified in those standards which use the PN designation system. s wesas xdid e jo suuoo on pdde uum Nd jo uop eu s pies ueon ss
This standard specifies the PN numbers which are used.
2Termsanddefinitions
For the purposes of this document the following term and definition applies.
2.1 PN
sional characteristics of a ponent of a pipework system.
It prises the letters PN followed by a dimensionless number.
NOTE 1 The number following the letters PN does not represent a measurable value and should not be used for calcu-lation purposes except where specified in the relevant standard.
NOTE 2 The designation PN is not meaningful unless it is related to the relevant ponent standard number.
NOTE 3 The maximum allowable pressure of a pipework ponent depends on the PN number the material and design of the ponent its maximum allowable temperature etc. The relevant European Component standards includetables of specified pressure/temperature ratings or in minimum include rules how to determine pressure/temperatureratings.
NOTE 4 for patible flange types. It is intended that all ponents with the same PN and DN designations have the same mating dimensions
3Selection of PN
The PN values shall be selected from:
PN 2 5 PN 25 PN 160PN 6 PN 40 PN 250PN 10 PN 63 PN 320PN 16 PN 100 PN 400
