1、BRITISH STANDARD Steel tubes and fittings for onshore and offshore pipelines External two layer extruded polyethylene based coatings The European Standard EN 10288:2002 has the status ofa British Standard ICs 23.040.10; 23.040.40; 25.220.60 BS EN 10288:2002 WkNb A%“ U- rn% E rn NO COPYING WITHOUT BS
2、I PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW $ present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organ
3、izations represented on this committee 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 Standards Catalogue under the section entitled “International Standar
4、ds Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard
5、 does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 48, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last is
6、sued. OBSI 10 May 2002 ISBN O 580 39686 X EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10288 April 2002 ICs 23.040.1 O; 23.040.40; 25.220.60 English version Steel tubes and fittings for onshore and offshore pipelines - External two layer extruded polyethylene based coatings Tubes et raccords
7、 en acier pour canalisations enterres et immerges - Revtements externes double couche base de polythylne extrud Stahlrohre- und Formstcke fr erd- und wasserverlegte Rohrleitungen - Im Zweischicht-Verfahren extrudierte Polyethylenbeschichtungen This European Standard was approved by CEN on 26 Decembe
8、r 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtaine
9、d 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 translation under the responsibility of a CEN member into its own language and notified to the Management Centre
10、 has the same status as the official versions. 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. EUROP
11、EAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10288:2002 E EN 10288:200
12、2 (E) Contents page Foreword 4 1 2 3 3.1 3.2 4 5 5.1 5.2 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 8.10 8.1 1 8.12 8.13 8.14 9 9.1 9.2 9.3 9.4 10 11 12 12.1 12.2 12.3 12.4 Scope 5 Normative references 5 Terms. definitions and symbols . 6 Terms and definitions 6 Symbols 6 Classification of co
13、atings . 6 Information to be supplied by the purchaser 6 Mandatory . 6 Documents 7 Application of the coating . 7 Surface preparation . 7 Composition of the coating 8 Requirements of the applied coating . 8 General 8 Thickness of the coating system . 9 Holiday detection . 11 Impact resistance . 11 O
14、ptions to be indicated by the purchaser . 7 Appearance and continuity . 9 Cut back at the ends 11 Peel force 12 Indentation resistance . 12 Elongation at break 13 Electrical insulation resistance 13 Resistance to ultraviolet irradiation . 13 Thermal stability . 13 Cathodic disbondment 15 Flexibility
15、 . 15 Inspection . 15 Document 15 Sampling . 16 Retests 18 Repairs 18 Marking . 18 Handling, transportation and storage 19 Handling 19 Nature and frequency of testing and control 16 Transportation to the storage area 19 Storage I9 Loading of tubes and components for delivery 19 Annex A (normative) I
16、nspection of thickness 20 A.3 Procedure . 20 A.l General 20 A.2 Apparatus . 20 A.4 Results 20 2 EN 10288:2002 (E) Annex B (normative) Holiday detection test 21 B.l General 21 B.2 Apparatus . 21 B.3 Procedure . 21 B.4 Results 21 Annex C (normative) Impact test 22 C.l General 22 C.2 Apparatus . 22 C.3
17、 Procedure . 22 C.4 Results 23 Annex D (normative) Peel force test 24 D.l Measurement of the peeling force on a coated sample (typel) 24 D.2 Measurement of the peel strength on large diameter tube (type 2) . 25 Annex E (normative) Indentation test 30 E.l General 30 E.2 Apparatus . 30 E.3 Procedure .
18、 30 E.4 Results 30 Annex F (normative) Specific electrical insulation resistance test 31 F.l General 31 F.2 Apparatus . 31 F.3 Procedure . 31 F.4 Results 31 Annex G (normative) Elongation at break test 35 G.l General 35 G.2 Apparatus . 35 G.4 Procedure . 35 G.5 Results 36 Annex H (normative) Ultravi
19、olet irradiation and thermal stability tests . 37 H.l Resistance to ultraviolet irradiation . 37 H.2 Thermal stability 38 Annex J (normative) Cathodic disbondment test 40 J.l General 40 J.2 Apparatus . 40 J.3 Sampling . 41 J.4. Procedure . 42 J.5 Results 42 Annex K (normative) Types of inspection do
20、cuments 46 Annex L (informative) A-Deviation . 47 Bibliography 48 G.3 Sampling . 35 3 EN 10288:2002 (E) Foreword This document EN 10288:2002 has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes“, the secretariat of which is held by UNI. This European Standar
21、d shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2002, and conflicting national standards shall be withdrawn at the latest by October 2002. During the 6 months enquiry, it appeared that two tests were omitted:
22、- long term performance; - stress cracking. After discussions, the conclusions were that there was insufficient data for standardization of test conditions and required properties. ECISS/TC 29/SC 4 agreed to leave the standards as they are and to create an Ad Hoc Group to study these problems in ord
23、er 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 CENKENELEC Internal Regulations, the national standards organizations of the following countr
24、ies 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. 4 EN 10288:2002 (E) 1 Scope This European Stan
25、dard 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
26、 “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 b
27、y means of cathodic protection. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, s
28、ubsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendments or revision. For undated references, the latest edition of the publication referred to applies (including amendments). prEN 10224, Steel tubes and steel fittin
29、gs for the conveyance of aqueous liquids including water for human consumption - Technical delivery conditions. IS0 527-2:1993, Plastics - Determination of tensile properties - Part 2 : Test conditions for moulding and extrusion plastics. IS0 1133, Plastics - Determination of the melt mass-flow rate
30、 (MFR) and the melt volume-flow rate (MVR) of thermoplastics. IS0 1 1 83, Plastics - Methods for determining the density and relative density of non-cellular plastics. IS0 4287, Geometrical Product Specification (GPS) - Surface texture : Profile method - Terms, definitions and surface texture parame
31、ters. IS0 4892-2: 1994, Plastics - Methods of exposure to laboratory light sources - Part 2 : Xenon-arc sources. IS0 8501 -1, Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part I: Rust grades and preparation grades of u
32、ncoated steel substrates and of steel substrates after overall removal of previous coatings. IS0 11420, Method for the assessment of the degree of carbon black dispersion in polyolefin pipes, fittings and compounds. 5 EN 10288:2002 (E) 3 Terms, definitions and symbols 3.1 Terms and definitions For t
33、he purposes of this European Standard, the following terms and definitions apply. 3.1 .I product manufacturer supplier of the coating material in a condition suitable for application to the product to coat 3.1.2 coater person responsible for applying the coating material to the components to coat in
34、 accordance with the provisions of this European Standard or the special requirements given in the tender specification and in the order 3.1.3 purchaser company which buys the coated products 3.2 Symbols R, roughness parameter (the average roughness from five successive evaluation areas measured acc
35、ording to IS0 4287); R, specific electrical insulation resistance, expressed in ohmssquare metres (Ckm2); k correction factor. 4 Classification of coatings The coating shall consist of two layers: an adhesive and an extruded polyethylene outer sheath. The type 1 adhesive can either be applied as a p
36、owder or by extrusion, the type 2 adhesive is applied by flood coating. 5 Information to be supplied by the purchaser 5.1 Mandatory The purchaser shall state in his enquiry and order the following minimum information: - tubes and components coated in accordance with this European Standard shall be d
37、esignated by reference to this 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 O00 m of tube - EN 10224 of 406,4-4,
38、 O external coating EN 10288 Class 1, Type 1, category A; - maximum number and dimensions of repairs; - maximum service temperature. 6 EN 10288:2002 (E) 5.2 Options to be indicated by the purchaser definition of surface preparation (see Table 8); cut back at the ends (see Table 8); electrical insula
39、tion 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
40、the top coat. Documents See 9.1. 7 Application of the coating 7.1 Surface preparation Two kinds of surface preparation can be applied according to the type of coating. 7.1.1 Type 1 7.1.1.1 The tube and components shall be abrasive blast cleaned. The degree of cleanliness shall be Sa 2 1/2 in accorda
41、nce with IS0 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 surface preparation or to the adhesion of the coating. 7.1
42、.1.3 After blast cleaning, the surface of the tube shall be inspected. All slivers, laminations, weld spatter and other 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 m
43、inimum tolerance requirements specified by the relevant standard. All treated areas greater than 10 cm2 shall be prepared to provide a 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 Con
44、taminants (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 determined in agreem
45、ent with the manufacturers of the products. 7 EN 10288:2002 (E) The temperature holding time of the tube shall not result in oxidation of its surface, detrimental to the good quality and adhesion of the coating. The temperature of the tube shall be monitored using suitable means in order to make sur
46、e that the application conditions are fully satisfied. 7.1.2 Type 2 This method may only be used for type 2 coatings. Where a type 2 system is specified, a chemical cleaning and passivation process may be used as an alternative to blast cleaning. 7.2 Composition of the coating The coating shall cons
47、ist of two layers and shall be applied in the factory in accordance with the established proced Ure. The constituent material data sheets shall contain the items required in Table 1. 7.2.1 Layer 1 7.2.1.1 Type 1 The layer shall be formed by a polymer intended to provide adhesion between the steel su
48、bstrate and layer 2. Its thickness shall be uniform and its minimum value shall make it possible to satisfy the requirements of clause 8. 7.2.1.2 Type 2 The layer shall be formed by a mastic adhesive characterized by its ability to flow at relatively low ambient temperatures and which provides adhes
49、ion between the steel substrate and layer 2. Its thickness shall be uniform and its minimum value shall make it possible to satisfy the requirements of clause 8. 7.2.2 Layer2 The layer shall be formed by the polyethylene outer sheath. The thickness shall be uniform with a minimum sufficient 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 the coating are obtained. The pigments shall be dispersed uniformly. Unless otherwise agreed the coa
