SIST EN 12501-2:2003
(Main)Protection of metallic materials against corrosion - Corrosion likelihood in soil - Part 2: Low alloyed and non alloyed ferrous materials
Protection of metallic materials against corrosion - Corrosion likelihood in soil - Part 2: Low alloyed and non alloyed ferrous materials
This part of prEN 12501 deals with the assessment of the corrosion load in soil for low-alloyed and non-alloyed ferrous materials in direct contact with soil. Corrosion protection systems and their performance are not covered by this standard but by specific products standards.
This part of the standard deals with the case of new structures to be buried and gives information for existing structures.
Korrosionsschutz metallischer Werkstoffe - Korrosionswahrscheinlichkeit in Böden - Teil 2: Niedrig- und unlegierte Eisenwerkstoffe
Dieser Teil der Norm behandelt die Beurteilung der Korrosionsbelastung in Böden für niedrig und unlegierte Eisenwerkstoffe im direkten Kontakt mit Boden. Korrosionsschutzsysteme und ihre Leistungsfähigkeit werden durch diese Norm nicht abgedeckt, sondern werden in speziellen Produktnormen geregelt.
Dieser Teil der Norm behandelt neue erdüberdeckte Anlagen und informiert über bestehende Anlagen.
Protection des matériaux métalliques contre la corrosion - Risque de corrosion dans les sols - Partie 2 : Matériaux ferreux faiblement ou non alliés
La présente partie de la Norme européenne traite de l'évaluation de la force corrosive dans les sols des matériaux ferreux faiblement ou non alliés qui sont en contact direct avec le sol. Les systemes de protection contre la corrosion et leur performance ne sont pas abordés dans la présente norme, mais ils sont traités dans d'autres normes spécifiques, relatives aux produits.
La présente partie de la Norme européenne traite du cas des nouvelles structures destinées a etre enterrées et donne des informations sur les structures existantes.
Protikorozijska zaščita kovinskih materialov - 2. del: Malolegirani in nelegirani železovi materiali
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Korrosionsschutz metallischer Werkstoffe - Korrosionswahrscheinlichkeit in Böden - Teil 2: Niedrig- und unlegierte EisenwerkstoffeProtection des matériaux métalliques contre la corrosion - Risque de corrosion dans les sols - Partie 2 : Matériaux ferreux faiblement ou non alliésProtection of metallic materials against corrosion - Corrosion likelihood in soil - Part 2: Low alloyed and non alloyed ferrous materials77.060Korozija kovinCorrosion of metalsICS:Ta slovenski standard je istoveten z:EN 12501-2:2003SIST EN 12501-2:2003en01-december-2003SIST EN 12501-2:2003SLOVENSKI
STANDARD
SIST EN 12501-2:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12501-2April 2003ICS 77.060English versionProtection of metallic materials against corrosion - Corrosionlikelihood in soil - Part 2: Low alloyed and non alloyed ferrousmaterialsProtection des matériaux métalliques contre la corrosion -Risque de corrosion dans les sols - Partie 2: Matériauxferreux peu ou non alliésKorrosionsschutz metallischer Werkstoffe -Korrosionswahrscheinlichkeit in Böden - Teil 2: Niedrig- undunlegierte EisenwerkstoffeThis European Standard was approved by CEN on 21 February 2003.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 Management Centre 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 Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12501-2:2003 ESIST EN 12501-2:2003
EN 12501-2:2003 (E)2ContentspageForeword.3Introduction.41Scope.42Normative references.43Terms and definitions.44Assessment of the corrosion load in soil for a new structure to be buried.44.1Method.44.2Criteria.54.2.1Soil conditions.54.2.2Preliminary Inquiry.54.2.3Site survey.54.2.4Soil sampling.64.2.5Backfill materials.75Complementary information for an existing structure.75.1General.75.2Investigations and analysis.8Annex A (informative)
Procedure for assessing the corrosion load in soil in the case of a newstructure.9Annex B (informative)
General principles of soil studies.10SIST EN 12501-2:2003
EN 12501-2:2003 (E)3ForewordThis document (EN 12501-2:2003) has been prepared by Technical Committee CEN/TC 262 “Metallic and otherinorganic coatings”, the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 12501-2:2003
EN 12501-2:2003 (E)4IntroductionThis European Standard should be used in conjunction with EN 12501-1, Protection of metallic materials againstcorrosion — Corrosion likelihood in soil — Part 1: General, which describes general principles of the assessment ofthe corrosion load.The method of assessing the corrosion load in the case of a new structure to be installed takes into account theadverse parameters of the soil and environment with regard to corrosion. They have been chosen to avoidunderestimation of the risks of corrosion damage. The assessment is performed considering a bare structure indirect contact with the soil without taking into account any protective system that will be present in service.The complexity of corrosion in soil demands that the measurements and their interpretation are carried out byexperienced personnel. The described method should be adapted in relation to the expected service life of thestructure and to possible future changes of its environment.1 ScopeThis part of this European Standard deals with the assessment of the corrosion load in soil for low-alloyed and non-alloyed ferrous materials in direct contact with soil. Corrosion protection systems and their performance are notcovered by this standard but by specific products standards.This part of this European Standard deals with the case of new structures to be buried and gives information forexisting structures.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 12501-1:2003, Protection of metallic materials against corrosion — Corrosion likelihood in soil — Part 1:General.3 Terms and definitionsFor the purposes of this European Standard, the terms and definitions given in EN 12501-1:2003 apply.4 Assessment of the corrosion load in soil for a new structure to be buried4.1 MethodThe method to be applied is based on:¾ general concepts and factors influencing the corrosion load given in EN 12501-1;¾ criteria defined in the present standard.SIST EN 12501-2:2003
EN 12501-2:2003 (E)5The corrosion load is accepted high if no investigation is done for any reason.4.2 Criteria4.2.1 Soil conditionsTable 1 summarises different soil conditions to be examined during either the preliminary inquiry or the site surveyand which indicate a location of high corrosion load, in the absence of further investigation.Table 1 — soil conditions that can lead to a high corrosion loadCharacteristicsCircumstancesExamples of criteriaType of soilNatural soilPresence of peat, lignite, coal . in the soilsAreas such as marsh, fen, .Tidal zonePresence of brackish or sea water tableAnaerobic soils (Possible Microbially Induced Corrosion)Artificial soilSoils containing ashes, slag, industrial by-products, residuesof household refuse, .Areas backfilled by industrial by-products (any type)Uncontrolled recycled materialsElectrical influenceDevice using DCClose vicinity of DC railways, tramways, underground, .Proximity of a cathodically protected structure, or anodes, .Device using ACProximity of AC power lines, AC railwaysProximity to AC earthing electrodesPollutionContaminated soilsContamination by de-icing salts, manure, fertilisers, leakingsewer, industrial pollutionTopography HydrographyPresence on the pipe route of a low point, a creek or rivercrossing, .OthersToponomyIndications from the village names of special characters of thenature of soilThree phase boundaryFluctuating water table4.2.2 Preliminary InquiryA preliminary inquiry generally consists of a topographical study, a geological study and an investigation for specificinformation. It enables to identify areas which should be studied with particular attention during the site survey.Annex B gives more detailed information on the way to collect data during the preliminary inquiry.In the absence of further investigation, such as site survey or soil sampling, and if one or more criteria as given intable 1 are met corrosion load is accepted high.4.2.3 Site surveyA site survey consists in collecting additional information (see Table 1) by observations and measurements on theconstruction site; soil resistivity measurements have to be performed and, when appropriate, potential gradientmeasurements.Annex B gives additional information on the way to carry out a site survey.The following criteria allow to assess the corrosion load, based on visual inspection of soil and resistivitymeasurements from the surface during the site survey:SIST EN 12501-2:2003
EN 12501-2:2003 (E)6¾ resistivity values below 30 Wm and/or soil conditions as given in Table 1 indicate locations of high corrosionload;¾ if resistivity values are above 30 Wm, additional investigation such as soil sampling shall be done. However, ifthe three following conditions are fulfilled together, they indicate locations of low corrrosion load and no otherinvestigation is necessary:¾
soil is sand or gravel,¾
resistivity values are above 100 Wm, for site survey conditions representative of the average soilmoisture content and temperature values,¾
soil conditions as given in Table 1 are absent.In addition, in case of a possible electrical influence, whatever its origin, measurements should be taken on site inorder to assess more precisely its effects on the estimation of the corrosion load. If no measurement is performedthe corrosion load is accepted high.4.2.4 Soil samplingSoil samples are taken at various locations on
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