EN 1333:2006

Flanges and their joints - Pipework components - Definition and selection of PN

This European Standard gives the definition of PN when applied to components of a pipework system, as specified in those standards which use the PN designation system.
This standard specifies the PN numbers which are used.

Flansche und ihre Verbindungen - Rohrleitungsteile - Definition und Auswahl von PN

Diese Europäische Norm definiert den Begriff PN, soweit er in Normen, die das PN-Kenngrößensystem an-
wenden, für Bauteile eines Rohrleitungssystems verwendet wird.
Diese Norm legt die gebräuchlichen PN-Stufen fest.

Brides et leurs assemblages - Composants de réseaux de tuyauteries - Définition et sélection des PN

La présente Norme européenne donne la définition de PN appliquée aux composants d’un réseau de tuyauteries, qui s’applique aux composants dont les normes se réfèrent à la désignation par le PN.
Cette norme prescrit les numéros de PN qui sont utilisés.

Prirobnice in prirobnični spoji - Sestavni deli cevovodov - Definicija in izbira tlačne stopnje PN

General Information

• Status: Published
• Publication Date: 07-Mar-2006
• Withdrawal Date: 29-Sep-2006
• ICS: 01.040.23 - Fluid systems and components for general use (Vocabularies)
• ICS: 23.040.01 - Pipeline components and pipelines in general
• Technical Committee: CEN/TC 74 - Flanges and their joints
• Drafting Committee: CEN/TC 74 - Flanges and their joints
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 04-Jun-2022
• Completion Date: 04-Jun-2022
• Directive: 90/531/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: SIST EN 1333:2006 - Flanges and their joints - Pipework components - Definition and selection of PN

Relations

• Replaces: EN 1333:1996 - Pipework components - Definition and selection of PN
• Effective Date: 22-Dec-2008

Overview

EN 1333:2006 is a key European standard developed by CEN that defines the nominal pressure (PN) designation used for pipework components such as flanges, couplings, and joints. This standard provides comprehensive guidance on the definition and selection of PN numbers, ensuring consistent and reliable specification of pressure ratings across pipework systems. It replaces the earlier EN 1333:1996 and aligns with international practices without adopting the loosely related definitions from ISO 7268:1983.

The PN designation is widely applied in European standards related to pipework, serving as a reference for the mechanical and dimensional characteristics of components. This standardized approach facilitates compatibility, safety, and interoperability in fluid system design and manufacturing.

Key Topics

• Definition of PN: EN 1333:2006 clarifies that PN stands for a dimensionless number following the letters “PN” that references pressure ratings related to pipework components. It is crucial to understand the PN value is not a precise measurable pressure but a standardized designation connected to relevant component standards.

• PN Number Range: The standard specifies the officially recognized PN numbers, including common values such as PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, and PN 400. These options enable designers and engineers to select appropriate ratings for varying applications.

• Component Compatibility: Components with identical PN and DN (nominal diameter) designations are designed to have matching mating dimensions. This enables interchangeability and ease of assembly in pipework systems.

• Factors Influencing Pressure Ratings: While PN provides a nominal reference, actual maximum allowable pressure depends on multiple factors including component material, design, and temperature limits, which are detailed in the respective European component standards.

Applications

EN 1333:2006 is essential for professionals involved in:

• Pipework Design and Engineering: Ensures selection of compatible flanges and pipe components with suitable pressure ratings based on standardized PN numbers.

• Manufacturing of Pipe Components: Manufacturers apply this standard to mark and produce components that fit seamlessly in systems designed according to European norms.

• Quality Assurance and Compliance: Facilitates verification of component specifications against standardized PN ratings to meet safety and regulatory requirements.

• Installation and Maintenance: Helps engineers and technicians match flange and joint components correctly for reliable operation and system integrity.

Typical industries benefiting from EN 1333:2006 include oil and gas, chemical processing, water treatment, power generation, and HVAC systems, where safe and standardized pipework connections are critical.

Related Standards

EN 1333:2006 interfaces with multiple other standards to support harmonized pipework design:

• European Component Standards: Other CEN standards that use PN designations to define detailed pressure/temperature ratings and dimensional data for specific components such as flanges, couplings, or valves.

• ISO 7268: The international standard on nominal pressure, although EN 1333:2006 refines and clarifies definitions to avoid ambiguity found in ISO 7268.

• DN (Nominal Diameter) Standards: Ensures dimensional compatibility aligned with DN sizes for pipe components.

• CEN Technical Committee TC 74 Standards: Cover flanges, flange joints, and sealing elements complementing the PN designation system.

Summary

EN 1333:2006 establishes a clear and practical framework for defining and selecting nominal pressure (PN) ratings for pipework components in Europe. By adopting this standard, industries benefit from enhanced compatibility, safety assurance, and regulatory compliance when designing and maintaining pipe systems. It is essential for engineers, manufacturers, and quality professionals aiming for consistency in pipework component specification and assembly.

Keywords: EN 1333:2006, nominal pressure PN, pipework components, flanges and joints, PN designation, pipe system standards, pressure rating, European pipework standards, flange compatibility, pipe component selection.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flansche und ihre Verbindungen - Rohrleitungsteile - Definition und Auswahl von PNBrides et leurs assemblages - Composants de réseaux de tuyauteries - Définition et sélection des PNFlanges and their joints - Pipework components - Definition and selection of PN23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and joints01.040.23Fluid systems and components for general use (Vocabularies)ICS:Ta slovenski standard je istoveten z:EN 1333:2006SIST EN 1333:2006en01-maj-2006SIST EN 1333:2006SLOVENSKI
STANDARDSIST EN 1333:19981DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1333March 2006ICS 01.040.23; 23.040.01Supersedes EN 1333:1996
English VersionFlanges and their joints - Pipework components - Definition andselection of PNBrides et leurs assemblages - Composants de réseaux detuyauteries - Définition et sélection des PNFlansche und ihre Verbindungen - Rohrleitungsteile -Definition und Auswahl von PNThis European Standard was approved by CEN on 23 January 2006.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 bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat 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 a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1333:2006: ESIST EN 1333:2006

Foreword This document (EN 1333:2006) has been prepared by Technical Committee CEN/TC 74 “Flanges and
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