SIST EN 10288:2003
(Main)Steel tubes and fittings for onshore and offshore pipelines - External two layer extruded polyethylene based coatings
Steel tubes and fittings for onshore and offshore pipelines - External two layer extruded polyethylene based coatings
This European Standard defines the application of factory applied external two layer extruded polyethylene based coatings for the corrosion protection of tubes and pipeline components.
External extruded polyethylene coating can be used for the protection of buried or submerged tubes service at temperatures up to + 60 °C for type 1 and + 30 °C for type 2.
The coatings in this standard can be applied to longitudinally or spirally welded and to seamless steel tubes and components used for the construction of pipelines for conveying liquids or gases.
Tubes coated with this type of coating may be further protected by means of cathodic protection.
Stahlrohre und -formstücke für erd- und wasserverlegte Rohrleitungen - Im Zweischichtverfahren extrudierte Polyethylenumhüllungen
Diese Europäische Norm legt die Anforderungen an werksseitig im Zweischicht-Verfahren aufgebrachte extrudierte Polyethylenumhüllungen fest, die dem Korrosionsschutz von Rohren und Rohrleitungsteilen dienen.
Eine extrudierte Polyethylenumhüllung kann zum Schutz erd- oder wasserverlegter Rohre bei Betriebs-temperaturen bis + 60°C für Typ 1 und bis + 30°C für Typ 2 angewendet werden.
Nach dieser Norm können Umhüllungen auf längs- oder spiralgeschweißte sowie auf nahtlose Stahlrohre und Rohrleitungsteile zum Bau von Rohrleitungen für die Beförderung von Flüssigkeiten oder Gasen aufgebracht werden.
Rohre, die auf diese Art mit Polyethylen umhüllt wurden, dürfen außerdem einen kathodischen Schutz erhalten.
Tubes et raccords en acier pour canalisations enterrées et immergées - Revetements externes double couche a base de polyéthylene extrudé
La présente Norme européenne définit l'application en usine des revetements externes double couche a base de polyéthylene extrudé, destinés a protéger les tubes et éléments de canalisations contre la corrosion.
Les revetements externes en polyéthylene extrudé peuvent etre utilisés pour la protection des canalisations enterrées ou immergées travaillant a des températures pouvant atteindre + 60 °C pour les revetements de type 1 et + 30 °C pour les revetements de type 2.
Les revetements de la présente norme peuvent etre appliqués sur les tubes et éléments en acier soudés en long ou en hélice, ou sans soudure, utilisés dans la construction de canalisations de transport pour fluides liquides ou gazeux.
Les tubes recouverts au moyen de ce type de revetement peuvent en outre recevoir une protection cathodique.
Jeklene cevi in fitingi za cevovode v zemlji in pod vodo - Zunanja dvoplastna prevleka iz polietilena, izdelana z iztiskovanjem
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Jeklene cevi in fitingi za cevovode v zemlji in pod vodo - Zunanja dvoplastna prevleka iz polietilena, izdelana z iztiskovanjemStahlrohre und -formstücke für erd- und wasserverlegte Rohrleitungen - Im Zweischichtverfahren extrudierte PolyethylenumhüllungenTubes et raccords en acier pour canalisations enterrées et immergées - Revetements externes double couche a base de polyéthylene extrudéSteel tubes and fittings for onshore and offshore pipelines - External two layer extruded polyethylene based coatings77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific use25.220.60Organske prevlekeOrganic coatingsICS:Ta slovenski standard je istoveten z:EN 10288:2002SIST EN 10288:2003en01-april-2003SIST EN 10288:2003SLOVENSKI
STANDARD
SIST EN 10288:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10288April 2002ICS 23.040.10; 23.040.40; 25.220.60English versionSteel tubes and fittings for onshore and offshore pipelines -External two layer extruded polyethylene based coatingsTubes et raccords en acier pour canalisations enterrées etimmergées - Revêtements externes double couche à basede polyéthylène extrudéStahlrohre- und Formstücke für erd- und wasserverlegteRohrleitungen - Im Zweischicht-Verfahren extrudiertePolyethylenbeschichtungenThis European Standard was approved by CEN on 26 December 2001.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,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10288:2002 ESIST EN 10288:2003
EN 10288:2002 (E)2ContentspageForeword.41Scope.52Normative references.53Terms, definitions and symbols.63.1Terms and definitions.63.2Symbols.64Classification of coatings.65Information to be supplied by the purchaser.65.1Mandatory.65.2Options to be indicated by the purchaser.76Documents.77Application of the coating.77.1Surface preparation.77.2Composition of the coating.88Requirements of the applied coating.88.1General.88.2Appearance and continuity.98.3Thickness of the coating system.98.4Cut back at the ends.118.5Holiday detection.118.6Impact resistance.118.7Peel force.128.8Indentation resistance.128.9Electrical insulation resistance.138.10Elongation at break.138.11Resistance to ultraviolet irradiation.138.12Thermal stability.138.13Cathodic disbondment.158.14Flexibility.159Inspection.159.1Document.159.2Sampling.169.3Nature and frequency of testing and control.169.4Retests.1810Repairs.1811Marking.1812Handling, transportation and storage.1912.1Handling.1912.2Transportation to the storage area.1912.3Storage.1912.4Loading of tubes and components for delivery.19Annex A
(normative)
Inspection of thickness.20A.1General.20A.2Apparatus.20A.3Procedure.20A.4Results.20SIST EN 10288:2003
EN 10288:2002 (E)3Annex B (normative)
Holiday detection test.21B.1General.21B.2Apparatus.21B.3Procedure.21B.4Results.21Annex C (normative)
Impact test.22C.1General.22C.2Apparatus.22C.3Procedure.22C.4Results.23Annex D (normative)
Peel force test.24D.1Measurement of the peeling force on a coated sample (type1).24D.2Measurement of the peel strength on large diameter tube (type 2).25Annex E (normative)
Indentation test.30E.1General.30E.2Apparatus.30E.3Procedure.30E.4Results.30Annex F (normative)
Specific electrical insulation resistance test.31F.1General.31F.2Apparatus.31F.3Procedure.31F.4Results.31Annex G (normative)
Elongation at break test.35G.1General.35G.2Apparatus.35G.3Sampling.35G.4Procedure.35G.5Results.36Annex H (normative)
Ultraviolet irradiation and thermal stability tests.37H.1Resistance to ultraviolet irradiation.37H.2Thermal stability.38Annex J
(normative)
Cathodic disbondment test.40J.1General.40J.2Apparatus.40J.3Sampling.41J.4.Procedure.42J.5Results.42Annex K
(normative)
Types of inspection documents.46Annex L (informative)
A-Deviation.47Bibliography.48SIST EN 10288:2003
EN 10288:2002 (E)4ForewordThis document EN 10288:2002 has been prepared by Technical Committee ECISS/TC 29 "Steel tubes and fittingsfor steel tubes", the secretariat of which is held by UNI.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 2002, and conflicting national standards shall be withdrawn at the latestby October 2002.During the 6 months enquiry, it appeared that two tests were omitted: long term performance; stress cracking.After discussions, the conclusions were that there was insufficient data for standardization of test conditions andrequired properties.ECISS/TC 29/SC 4 agreed to leave the standards as they are and to create an Ad Hoc Group to study theseproblems in order to be able to introduce these tests in the 5 years revision.The annexes A, B, C, D, E, F, G, H, J and K are normative.The annex L is informative.This standard includes a Bibliography.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, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 10288:2003
EN 10288:2002 (E)51 ScopeThis European Standard defines the application of factory applied external two layer extruded polyethylene basedcoatings for the corrosion protection of tubes and pipeline components.External extruded polyethylene coating can be used for the protection of buried or submerged tubes service attemperatures up to + 60 °C for type 1 and + 30 °C for type 2.The coatings in this standard can be applied to longitudinally or spirally welded and to seamless steel tubes andcomponents used for the construction of pipelines for conveying liquids or gases.Tubes coated with this type of coating may be further protected by means of cathodic protection.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 amendments or revision. For undated references, the latest edition of thepublication referred to applies (including amendments).prEN 10224, Steel tubes and steel fittings for the conveyance of aqueous liquids including water for humanconsumption - Technical delivery conditions.ISO 527-2:1993, Plastics - Determination of tensile properties – Part 2 : Test conditions for moulding and extrusionplastics.ISO 1133, Plastics - Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) ofthermoplastics.ISO 1183, Plastics - Methods for determining the density and relative density of non-cellular plastics.ISO 4287, Geometrical Product Specification (GPS) – Surface texture : Profile method – Terms, definitions andsurface texture parameters.ISO 4892-2:1994, Plastics - Methods of exposure to laboratory light sources – Part 2 : Xenon-arc sources.ISO 8501-1, Preparation of steel substrates before application of paints and related products – Visual assessmentof surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steelsubstrates after overall removal of previous coatings.ISO 11420, Method for the assessment of the degree of carbon black dispersion in polyolefin pipes, fittings andcompounds.SIST EN 10288:2003
EN 10288:2002 (E)63 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1.1product manufacturersupplier of the coating material in a condition suitable for application to the product to coat3.1.2coaterperson responsible for applying the coating material to the components to coat in accordance with the provisions ofthis European Standard or the special requirements given in the tender specification and in the order3.1.3purchasercompany which buys the coated products3.2 SymbolsRzroughness parameter (the average roughness from five successive evaluation areas measured according toISO 4287);Rsspecific electrical insulation resistance, expressed in ohms.square metres (m²);kcorrection factor.4 Classification of coatingsThe coating shall consist of two layers: an adhesive and an extruded polyethylene outer sheath. The type 1adhesive can either be applied as a powder or by extrusion, the type 2 adhesive is applied by flood coating.5 Information to be supplied by the purchaser5.1 MandatoryThe purchaser shall state in his enquiry and order the following minimum information: tubes and components coated in accordance with this European Standard shall be designated by reference tothis standard followed by the thickness class of the coating, the type and the category for type 1. If applicable,the reference to the standard for the tube to which the coating is applied shall be added to this designation;EXAMPLE : 5 000 m of tube - EN 10224 of 406, 4-4, 0external coating EN 10288 Class 1, Type 1, category A; maximum number and dimensions of repairs; maximum service temperature.SIST EN 10288:2003
EN 10288:2002 (E)75.2 Options to be indicated by the purchaser definition of surface preparation (see Table 8); cut back at the ends (see Table 8); electrical insulation resistance (see Table 8); resistance to ultraviolet irradiation (see Table 8); thermal stability (see Table 8); cathodic disbondment (see Table 8); flexibility (see Table 8); scheme of procedure qualification; type of inspection document required, if different to the one of clause 9; colour of the top coat.6 DocumentsSee 9.1.7 Application of the coating7.1 Surface preparationTwo kinds of surface preparation can be applied according to the type of coating.7.1.1 Type 17.1.1.1 The tube and components shall be abrasive blast cleaned. The degree of cleanliness shall be Sa 2 1/2 inaccordance with ISO 8501-1.7.1.1.2 Prior to abrasive blast cleaning, the steel surface shall be dry and free from contamination (oil, grease,temporary corrosion protection, etc.) and surface defects (slivers, laminations, etc.) detrimental to the surfacepreparation or to the adhesion of the coating.7.1.1.3 After blast cleaning, the surface of the tube shall be inspected. All slivers, laminations, weld spatter andother surface imperfections made visible by the blast cleaning process shall be removed.After removal of these defects, the residual thickness of tube and components shall satisfy the minimum tolerancerequirements specified by the relevant standard. All treated areas greater than 10 cm² shall be prepared to providea profile to satisfy the provisions of 7.1.7.1.1.4 Tube and components shall be maintained at least 3 °C above the dew point temperature prior to coating.7.1.1.5 Contaminants (e.g. residual abrasive dust) shall be removed prior to coating.Chemical treatment of the steel may be used in addition to abrasive blast cleaning, by agreement.7.1.1.6 At the time of application, the temperature range at the surface of the tube to be coated shall be determinedin agreement with the manufacturers of the products.SIST EN 10288:2003
EN 10288:2002 (E)8The temperature holding time of the tube shall not result in oxidation of its surface, detrimental to the good qualityand adhesion of the coating.The temperature of the tube shall be monitored using suitable means in order to make sure that the applicationconditions are fully satisfied.7.1.2 Type 2This method may only be used for type 2 coatings. Where a type 2 system is specified, a chemical cleaning andpassivation process may be used as an alternative to blast cleaning.7.2 Composition of the coatingThe coating shall consist of two layers and shall be applied in the factory in accordance with the establishedprocedure.The constituent material data sheets shall contain the items required in Table 1.7.2.1 Layer 17.2.1.1 Type 1The layer shall be formed by a polymer intended to provide adhesion between the steel substrate and layer 2. Itsthickness shall be uniform and its minimum value shall make it possible to satisfy the requirements of clause 8.7.2.1.2 Type 2The layer shall be formed by a mastic adhesive characterized by its ability to flow at relatively low ambienttemperatures and which provides adhesion between the steel substrate and layer 2. Its thickness shall be uniformand its minimum value shall make it possible to satisfy the requirements of clause 8.7.2.2 Layer 2The layer shall be formed by the polyethylene outer sheath. The thickness shall be uniform with a minimumsufficient to meet the total system thickness requirements given in Table 2.Pigments and additives may be added to the basic polyethylene, provided that all the required properties of thecoating are obtained. The pigments shall be dispersed uniformly.Unless otherwise agreed the coater can add pigments and additives to the basic polyethylene. The requiredproperties shall be certified by a documented quality programme. The following tests shall be undertaken as aminimum: quantitative analysis of the raw-material components immediately before coating; determination of dispersion of pigments and additives in accordance with ISO 11420.8 Requirements of the applied coating8.1 GeneralThe required properties of the applied coatings are given below: appearance and continuity; thickness of the coating system;SIST EN 10288:2003
EN 10288:2002 (E)9 cut back at the ends; holiday detection; impact resistance; peel force; indentation resistance; electrical insulation resistance; elongation at break; resistance to ultraviolet irradiation; thermal stability; cathodic disbondment; flexibility.Other properties can be specified at the time of enquiry and order.A summary of the required properties is given in Table 7.8.2 Appearance and continuityThe appearance and continuity of the coating system shall be inspected visually over the total length of all tubes.The coating shall be of uniform colour, have a smooth appearance and be free of holidays, defects and laminationsdetrimental to the quality of the coating.8.3 Thickness of the coating systemCoating thickness shall be measured in accordance with the method defined in annex A.Unless otherwise agreed by the purchaser, the minimum thickness of the coating system at any point shallcorrespond to the value given in Table 2 depending on the class (1, 2, 3) specified.SIST EN 10288:2003
EN 10288:2002 (E)10Table 1 - Content of data sheets and certificatesItemsStandard test referenceLayer 1Layer 2 Date of issue+ o+ o Name of manufacturer+ o+ o Name and type of product+ o+ o Factory of originoo Batch or production lot numberoo Shelf life+ Physical state of the delivered product++ Packaging++ Storage conditions++ Sieve analysis+ o (powder only) DensityISO 1183 adhesive and PE+ o+ o Melt indexISO 1133+ o+ o Recommended processing temperature++ Content of pigmentISO 11420+ oDispersion of pigmentISO 11420o Maximum service temperature++ Elongation at breakISO 527-2++ Maximum moisture content++ Softening pointISO 306++NOTE 1+ Technical data sheetNOTE 2 o Test certificateSIST EN 10288:2003
EN 10288:2002 (E)11Table 2 - Minimum thickness of the coating systemTube diameter DmmThickness ammClasses123D
114,31,51,82,5114,3 < D
2731,82,02,7273 < D
5082,02,22,9508 < D
7622,22,53,2762 < D2,53,03,7aThe thicknesses given in this Table can be reduced by 10 % for submerged arcwelded tubes, at the weld reinforcement.8.4 Cut back at the endsThe length of the cut back shall be (150 ± 20) mm and the coating shall be bevelled at the cut back forming a bevelangle of
30° unless otherwise specified by the purchaser.When removing the coating, the surface of the tube shall not be damaged.8.5 Holiday detectionHoliday detection shall be carried out in accordance with the method defined in annex B.The coating shall be free from holidays.8.6 Impact resistanceThe minimum impact energy, in joules, shall be determined in accordance with the method defined in annex C andshall correspond to 5 J
k for each millimetre of nominal coating thickness. The values of k are given in Table 3.Table 3 - Correction factorDiametermmkD > 219,176,1 < D
219,1D
76,11,000,850,70SIST EN 10288:2003
EN 10288:2002 (E)128.7 Peel force8.7.1 Type 1The level of adhesion is dependent on the test temperature.Peel force shall be determined in accordance with annex D. The average and the minimum average values aredefined in annex D.Other test method can be used after agreement between the purchaser and coater.The minimum requirements for the peel force shall be as given in Table 4, according to the category specified.Table 4 - Minimum peel forceCategoryForce (in N/10 mm)
at room temperature (23
2) °CForce (in N/10 mm)at (60
2) °CMinimum averageAverageMinimum averageAverageA2030510B3040510C60801520NOTE 1If the top coat cannot be peeled from the tube, the measured tensile force at yield should be recorded andthe force of adhesion rated as greater than the tensile force at yield.NOTE 2Higher values may be agreed.8.7.2 Type 2Where the coating system is classified as type 2, the resistance to peeling shall be determined in accordance withthe method defined in D.2.The peeling resistance shall be such that the measured peel rate falls below the curve in D.2
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