EN 12502-1:2004
(Main)Protection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 1: General
Protection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 1: General
This document gives guidance for the assessment of the corrosion likelihood of metallic materials in water distribution and storage systems, as a result of corrosion on the water-side.
NOTE This document lists the different types of corrosion and describes in general terms the factors influencing corrosion likelihood.
Water distribution and storage systems considered in this document are used for waters intended for human consumption according to EC directive 98/83/EEC and for waters of similar chemical composition.
This document does not cover systems that convey the following types of water.
- sea water;
- brackish water;
- geothermal water;
- sewage water;
- swimming pool water;
- open cooling tower water;
- recirculating heating and cooling water;
- demineralized water.
Parts 2 to 5 of this document cover the factors influencing the corrosion likelihood for copper and copper alloys, hot-dip galvanized ferrous materials, stainless steels and cast iron, unalloyed and low alloyed steels in detail.
This document does not cover lead.
Korrosionsschutz metallischer Werkstoffe - Hinweise zur Abschätzung der Korrosionswahrscheinlichkeit in Wasserverteilungs- und speichersystemen - Teil 1: Allgemeines
Dieses Dokument gibt Hinweise zur Abschätzung der Korrosionswahrscheinlichkeit von metallischen Werkstoffen in Wasserverteilungs- und -speichersystemen als Folge wasserseitiger Korrosion.
Dieser Teil 1 des Dokuments benennt die verschiedenen Korrosionsarten und beschreibt in allgemeiner Form die Faktoren, die die Korrosionswahrscheinlichkeit beeinflussen.
Bei den in diesem Dokument behandelten Wasserverteilungs- und speichersystemen handelt es sich um Systeme für Wasser für den menschlichen Gebrauch entsprechend der EG-Richtlinie 98/83/EG und für Wässer ähnlicher chemischer Zusammensetzung.
Diese Norm behandelt nicht Systeme, in denen folgende Arten von Wässern gefördert werden:
- Meerwasser
- Brackwasser
- geothermisches Wasser
- Abwasser
- Schwimmbadwasser
- Wässer in offenen Kühltürmen
- zirkulierendes Heiz- und Kühlwasser
- entsalztes Wasser.
Die Teile 2 bis 5 dieses Dokumentes behandeln detailliert die Faktoren, die die Korrosionswahrscheinlichkeit von Kupfer und Kupferlegierungen, schmelztauchverzinkten Eisenwerkstoffen, nichtrostenden Stählen sowie Gusseisen und un- und niedriglegierten Stählen beeinflussen.
Blei wird in diesem Dokument nicht behandelt.
Protection des matériaux métalliques contre la corrosion - Recommandations pour l'évaluation du risque de corrosion dans les installations de distribution et de stockage d'eau - Partie 1: Généralités
Le présent document donne des recommandations pour l'évaluation du risque de corrosion des matériaux métalliques dans les installations de distribution et de stockage d'eau dû à une corrosion interne.
NOTE Le présent document énumère les différents types de corrosion et décrit en général les facteurs influant sur le risque de corrosion.
Les installations de distribution et de stockage d'eau considérées dans le présent document sont utilisées pour les eaux destinées à la consommation humaine conformément à la Directive européenne 98/83/CE et pour les eaux ayant une composition chimique similaire.
Le présent document ne s'applique pas aux installations qui transportent les types d'eaux suivants :
- les eaux de mer ;
- les eaux saumâtres ;
- les eaux géothermales ;
- les eaux usées ;
- les eaux de piscine ;
- les eaux de tours de refroidissement ouvertes ;
- les eaux de chauffage et de refroidissement en circulation ;
- les eaux déminéralisées.
Les Parties 2 et 5 de la présente Norme européenne couvrent dans le détail les facteurs influant sur le risque de corrosion du cuivre et des alliages de cuivre, des matériaux ferreux galvanisés à chaud, des aciers inoxydables et de la fonte, des aciers non alliés et faiblement alliés.
La présente Norme européenne ne s'applique pas au plomb.
Protikorozijska zaščita kovinskih materialov – Navodilo za ocenjevanje verjetnosti nastanka korozije v porazdeljeni vodi in skladiščnih sistemih - 1. del: Splošno
General Information
- Status
- Published
- Publication Date
- 21-Dec-2004
- Technical Committee
- CEN/TC 262 - Metallic and other inorganic coatings
- Drafting Committee
- CEN/TC 262/WG 10 - Corrosion likelihood
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 03-Sep-2018
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 22-Dec-2008
Overview
EN 12502-1:2004 is a European standard developed by CEN that provides comprehensive guidance on assessing the likelihood of corrosion affecting metallic materials used in water distribution and storage systems. Specifically, it addresses corrosion occurring on the water-side of these systems. These systems handle water intended for human consumption according to the EC Directive 98/83/EEC or waters with similar chemical composition.
This part of the standard-Part 1: General-outlines the fundamental concepts, types of corrosion, and influential factors affecting corrosion likelihood. It acts as a foundational reference for corrosion assessment, complementing Parts 2 to 5, which focus on specific metals like copper, galvanized ferrous materials, stainless steels, cast iron, and low alloy steels.
Key Topics
Types of Corrosion:
The standard identifies various corrosion types common in water systems, including:- Uniform corrosion
- Pitting corrosion
- Crevice corrosion
- Selective and knife-line corrosion
- Bimetallic (galvanic) corrosion
- Erosion corrosion
- Stress corrosion and corrosion fatigue
Factors Influencing Corrosion Likelihood:
Corrosion likelihood depends on a complex interplay of factors:- Metallic Material Characteristics: Chemical composition, microstructure, and surface condition significantly affect corrosion susceptibility.
- Water Characteristics: Physical and chemical properties of the water such as pH, temperature, dissolved oxygen, hardness, conductivity, chloride or sulfate ion concentrations, organic content, and alkalinity impact corrosion processes.
- Design and Construction: Geometry, presence of crevices or dead legs, multi-metal assemblies (risk of bimetallic corrosion), types of joints, and tensile stresses all influence corrosion behavior.
- Pressure Testing and Commissioning: Practices like draining after pressure testing and inadequate flushing can create conditions favorable to corrosion, such as water-air-metal contact zones.
- Operating Conditions: Temperature fluctuations, flow regimes, stagnant water zones, and disinfection methods modify the corrosion environment. High velocity flows can cause erosion corrosion, whereas stagnation promotes localized pitting.
Assessment Guidance:
The standard provides methodological advice to evaluate corrosion likelihood by considering all influencing factors systematically, emphasizing that only a corrosion expert or trained professional can properly assess and interpret these risks.
Applications
EN 12502-1:2004 is valuable for professionals involved in the design, construction, maintenance, and operation of potable water distribution and storage systems, enabling:
- Corrosion Risk Mitigation: Assisting engineers and designers to select appropriate metallic materials and optimize system design to minimize corrosion.
- Failure Analysis: Supporting diagnostic investigations following corrosion failures to prevent recurrence.
- Corrosion Protection Planning: Guiding decisions on additional protective measures such as coatings or cathodic protection.
- Maintenance Strategies: Informing flushing, disinfection, and operational protocols to reduce corrosion likelihood during service life.
Its practical orientation ensures that water system longevity and water quality are maintained by controlling corrosion-related deterioration in metallic components.
Related Standards
EN 12502-1:2004 is part of a 5-part series on corrosion assessment in water systems, including:
- Part 2: Influencing factors for copper and copper alloys
- Part 3: Influencing factors for hot-dip galvanized ferrous materials
- Part 4: Influencing factors for stainless steels
- Part 5: Influencing factors for cast iron, unalloyed and low alloyed steels
Additionally, it references international documents like EN ISO 8044:1999, which defines basic terms and concepts in corrosion of metals and alloys-critical for uniform understanding of corrosion terminology.
Keywords:
Water distribution systems, corrosion assessment, metallic materials, water storage systems, corrosion types, corrosion likelihood, potable water, EN 12502-1, CEN standard, corrosion risk, bimetallic corrosion, pitting corrosion, water quality, anti-corrosion design, pressure testing, water chemistry
Frequently Asked Questions
EN 12502-1:2004 is a standard published by the European Committee for Standardization (CEN). Its full title is "Protection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 1: General". This standard covers: This document gives guidance for the assessment of the corrosion likelihood of metallic materials in water distribution and storage systems, as a result of corrosion on the water-side. NOTE This document lists the different types of corrosion and describes in general terms the factors influencing corrosion likelihood. Water distribution and storage systems considered in this document are used for waters intended for human consumption according to EC directive 98/83/EEC and for waters of similar chemical composition. This document does not cover systems that convey the following types of water. - sea water; - brackish water; - geothermal water; - sewage water; - swimming pool water; - open cooling tower water; - recirculating heating and cooling water; - demineralized water. Parts 2 to 5 of this document cover the factors influencing the corrosion likelihood for copper and copper alloys, hot-dip galvanized ferrous materials, stainless steels and cast iron, unalloyed and low alloyed steels in detail. This document does not cover lead.
This document gives guidance for the assessment of the corrosion likelihood of metallic materials in water distribution and storage systems, as a result of corrosion on the water-side. NOTE This document lists the different types of corrosion and describes in general terms the factors influencing corrosion likelihood. Water distribution and storage systems considered in this document are used for waters intended for human consumption according to EC directive 98/83/EEC and for waters of similar chemical composition. This document does not cover systems that convey the following types of water. - sea water; - brackish water; - geothermal water; - sewage water; - swimming pool water; - open cooling tower water; - recirculating heating and cooling water; - demineralized water. Parts 2 to 5 of this document cover the factors influencing the corrosion likelihood for copper and copper alloys, hot-dip galvanized ferrous materials, stainless steels and cast iron, unalloyed and low alloyed steels in detail. This document does not cover lead.
EN 12502-1:2004 is classified under the following ICS (International Classification for Standards) categories: 23.040.99 - Other pipeline components; 77.060 - Corrosion of metals; 91.140.60 - Water supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12502-1:2004 has the following relationships with other standards: It is excused to EN 12502-2:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 12502-1:2004 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Korrosionsschutz metallischer Werkstoffe - Hinweise zur Abschätzung der Korrosionswahrscheinlichkeit in Wasserverteilungs- und
speichersystemen - Teil 1: AllgemeinesProtection des matériaux métalliques contre la corrosion - Recommandations pour l'évaluation du risque de corrosion dans les installations de distribution et de stockage d'eau - Partie 1: GénéralitésProtection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 1: General91.140.60Sistemi za oskrbo z vodoWater supply systems77.060Korozija kovinCorrosion of metals23.040.99Drugi sestavni deli za cevovodeOther pipeline componentsICS:Ta slovenski standard je istoveten z:EN 12502-1:2004SIST EN 12502-1:2005en01-marec-2005SIST EN 12502-1:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12502-1December 2004ICS 77.060; 23.040.99; 91.140.60English versionProtection of metallic materials against corrosion - Guidance onthe assessment of corrosion likelihood in water distribution andstorage systems - Part 1: GeneralProtection des matériaux métalliques contre la corrosion -Recommandations pour l'évaluation du risque de corrosiondans les installations de distribution et de stockage d'eau -Partie 1: GénéralitésKorrosionsschutz metallischer Werkstoffe - Hinweise zurAbschätzung der Korrosionswahrscheinlichkeit inWasserverteilungs- und
speichersystemen - Teil 1:AllgemeinesThis European Standard was approved by CEN on 22 November 2004.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, 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© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12502-1:2004: ESIST EN 12502-1:2005
The type and rate of corrosion for any particular alloy system can depend on: characteristics of the metallic material; characteristics of the water; design and construction; pressure testing and commissioning; operating conditions. As a result of the complex interactions between the various influencing factors, the extent of corrosion can only be expressed in terms of likelihood. This document therefore is a guidance document and does not set explicit rules for the use of metallic materials in water systems. It can be used to minimize the likelihood of corrosion damages occurring by: assisting in designing, installing and operating systems from an anti-corrosion point of view; evaluating the need for additional corrosion protection methods for a new or existing system; assisting in failure analysis, when failures occur in order to prevent repeat failures occurring. However, a corrosion expert, or at least a person with technical training and experience in the corrosion field is required to give a correct assessment of corrosion likelihood or failure analysis.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...