1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12068:1999 The Euro
2、pean Standard EN 12068:1998 has the status of a British Standard ICS 23.040.99; 25.220.60; 77.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Cathodic protection External organic coatings for the corrosion protection of buried or immersed steel pipelines used in conjunctio
3、n with cathodic protection Tapes and shrinkable materialsThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 1999 BSI 05-1999 ISBN 0 580 30229 6 BS EN 12068:1
4、999 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 12068:1998. The UK participation in its preparation was entrusted to Technical Committee ISE/16, Protective coatings and linings of metal pipes and fittin
5、gs, which has the responsibility to: to: aid enquirers to understand the text; 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 i
6、n the UK. A list of organizations 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 entitl
7、ed “International Standards 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. Complianc
8、e with a British Standard does not of itself 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 28, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de N
9、ormalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12068:1998 E EUROPEAN STANDARD EN 12068 NORME EUROPE ENNE EUROPA ISCHE NO
10、RM August 1998 ICS 23.040.99; 25.220.60 Descriptors: metal protection, corrosion prevention, electrochemical corrosion, organic coatings, adhesive tapes, cathodic protection, buried pipes, submerged construction, steel tubes, specifications, operating requirements, quality, conformity tests, tests E
11、nglish version Cathodic protection External organic coatings for the corrosion protection of buried or immersed steel pipelines used in conjunction with cathodic protection Tapes and shrinkable materials Protection cathodique Reve tements organiques exte rieurs pour la protection contre la corrosion
12、 de tubes en acier enterre s ou immerge s en conjonction avec la protection cathodique Bandes et mate riaux re tractables Kathodischer Korrosionsschutz Organische Umhu llungen fu r den Korrosionsschutz von in Bo den und Wa ssern verlegten Stahlrohrleitungen im Zusammenwirken mit kathodischem Korrosi
13、onsschutz Ba nder und schrumpfende Materialien This European Standard was approved by CEN on 18 July 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterati
14、on. Up-to-date lists and bibliographical references concerning such national standards 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 translati
15、on under the responsibility of a CEN member into its own language and notified to the Central Secretariat 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, Ital
16、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 12068:1998 BSI 05-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 219, Cathodic protection, the Secretariat of which is held by BSI. This European Standard shall
17、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999. According to the CEN/CENELEC Internal Regulations, the national standards o
18、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page For
19、eword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 4 4 Classification and designation 5 5 Requirements 6 6 Quality 9 Annex A (normative) Tape strength, elongation at break, modulus at 10 % elongation, bursting strength 11 Annex B (normative) Peel strength layer to layer 12 Annex
20、 C (normative) Peel strength to pipe surface and factory coating 13 Annex D (normative) Lap shear strength 13 Annex E (normative) Thermal ageing resistance 14 Annex F (normative) Ultraviolet irradiation resistance 16 Annex G (normative) Indentation resistance 17 Annex H (normative) Impact resistance
21、 18 Annex J (normative) Specific electrical insulation resistance 19 Annex K (normative) Cathodic disbondment resistance 20 Annex L (informative) Saponification value 21 Annex M (normative) Microbiological resistance 22 Annex N (normative) Low temperature flexibility 23 Annex P (normative) Low tempe
22、rature unrolling test 28 Annex Q (normative) Drip resistance of petrolatum tapes 28Page 3 EN 12068:1998 BSI 05-1999 Introduction This European Standard gives requirements for organic coatings based on tapes or shrinkable materials for corrosion protection of buried or immersed pipelines, used in con
23、junction with cathodic protection. This European Standard has been taken over from WG 6 of CEN/TC 262/SC 2, Cathodic protection, the Secretariat of which is held by DIN. There is a liaison between CEN/TC 262/SC 2/WG 6 and ECISS/TC 29/SC 4, to harmonize the standards prepared in both committees. This
24、 is primarily a functional standard giving the requirements for the material properties necessary to ensure the function of the coating. To ensure compatibility of the organic coatings with cathodically protected pipelines, tests of cathodic disbonding resistance at continuous operating temperature
25、are specified. Test requirements are given for 238C but due to limited data available to WG 6 it is intended that values for higher temperatures will be established after five years. Attention is drawn to the fact that degradation of the properties of a coating may occur following attack from microb
26、iological matter. Work is to be undertaken in Europe to produce a suitable test method but this may take several years. It is considered that a burial in soil is the only satisfactory test method. The described test method is proposed for the interim period of five years. 1 Scope This standard speci
27、fies the functional requirements and test methods for external organic coatings based on tapes or shrinkable materials to be used for corrosion protection of buried and immersed steel pipelines in conjunction with cathodic protection. It classifies coatings by increasing mechanical resistance and op
28、erating temperatures. Coatings for special installation conditions are also considered. A comprehensive classification of coatings in relation to functional requirements is defined. Tapes and shrinkable materials which meet the requirements of these classes can belong to various types defined in thi
29、s standard. This European Standard is not applicable to special applications in off-shore and stress loads caused by frequent temperature changes. Specifications of fillers are outside the scope of this European Standard. 2 Normative references This European Standard incorporates by dated or undated
30、 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, subsequent amendments to or revisions of any of these publications apply to this European Standard only when inc
31、orporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 1427, Petroleum products Bitumen and bituminous binders Determination of the softening point Ring and ball method. EN ISO 527-3:1995, Plastics Determination of tensile pro
32、perties Part 3: Test conditions for films and sheets. (ISO/DIS 527-3:1995) EN ISO 8503-2, Preparation of steel substrates before application of paints and related products Surface roughness characteristics of blast-cleaned steel substrates Part 2: Method for the grading of surface profile of abrasiv
33、e blast-cleaned steel Comparator procedure. (ISO 8503-2:1988) EN ISO 9000-1, Quality management and quality assurance standards Guidelines for selection and use. EN ISO 9000-2, Quality management and quality assurance standards Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 900
34、3. EN ISO 9001, Quality systems Model for quality assurance in design/development, production, installation and servicing. EN ISO 9002, Quality systems Model for quality assurance in production, installation and servicing. EN ISO 9003, Quality systems Model for quality assurance in final inspection
35、and test. ISO/DIS 188, Rubber, vulcanized Accelerated ageing and heat resistance tests. ISO 1523, Paints, varnishes, petroleum and related products Determination of flashpoint Closed cup equilibrium method. ISO 2808, Paints and varnishes Determination of film thickness. ISO 2811, Paints and varnishe
36、s Determination of density. ISO 3251, Paints and varnishes Determination of non-volatile matter of paints, varnishes and binders for paints and varnishes. ISO 3303:1990, Rubber- or plastics-coated fabrics Determination of bursting strength. ISO 3801, Textiles Woven fabrics Determination of mass per
37、unit length and mass per unit area. ISO 4591, Plastics Film and sheeting Determination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness). ISO 4593, Plastics Film and sheeting Determination of thickness by mechanical scannin
38、g.Page 4 EN 12068:1998 BSI 05-1999 ISO 4626, Volatile organic liquids Determination of boiling range. ISO 4892-1, Plastics Methods of exposure to laboratory light sources Part 1: General guidance. ISO 4892-2 , Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc sources. ISO 58
39、93, Rubber and plastics test equipment Tensile, flexural and compression types (consistant rate of traverse) Description. ISO 7254, Paints and varnishes Assessment of natural spreading rate Brush application. ISO 8501-1, Preparation of steel substrates before application of paints and related produc
40、ts Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings. 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 external organic coatings 3.1.
41、1 coating one or several layers of materials applied to the pipe in the form of tapes (spiral or “cigarette” wrapping), shrinkable materials (as delivered or constituted just prior to application) or repair materials Coatings can consist of one or more basic types of coating materials as described i
42、n 3.2. Primer(s) and/or filler(s) can be used in conjunction with these coating materials to improve adherence or facilitate application. 3.1.2 inner layer coating primarily constituted to protect the pipe surface from corrosion damage 3.1.3 outer layer coating primarily constituted to protect the i
43、nner layer from mechanical stresses 3.2 basic types of coating materials 3.2.1 petrolatum tape (cold applied) corrosion protection tape consisting of a synthetic reinforcement coated on both sides with a semi-solid petrolatum compound mouldable at ambient temperature; it may contain an additional ba
44、cking film 3.2.2 bituminous tape (hot applied) corrosion protection tape consisting of glass or synthetic reinforcement coated on both sides with a bituminous compound. 3.2.3 polymeric tape (cold or hot applied) corrosion protection tape consisting of a compound highly adhesive to steel and generall
45、y bonded to a flexible polymer film and may contain a synthetic reinforcement, these tapes can be subdivided into the following types: 3.2.3.1 laminate polymeric tape corrosion protection tape consisting of a flexible polymer film, coated on one or both sides with an adhesive compound; the adhesive
46、compound may be reinforced with synthetic fibres 3.2.3.2 reinforced polymeric tape corrosion protection tape consisting of a synthetic reinforcement, coated on both sides with an adhesive compound and containing an additional polymer film 3.2.3.3 low strength polymeric tape corrosion protection tape
47、 consisting only of an adhesive compound; it may contain a flexible polymer film (thickness# 0,15 mm) to avoid overstretching during application 3.2.4 shrinkable material corrosion protection product consisting of a polymer backing capable of controlled shrinking, generally precoated on one side wit
48、h an adhesive, the polymer backing can be reinforced. Shrinkable materials are available as: tubular sleeves; wraparound sleeves with either separate or attached closure; tapes; pre-shaped materials. 3.3 complementary materials 3.3.1 primer material applied (generally in a liquid form) as a thin fil
49、m over a prepared metal surface and the adjacent pipe coating in order to ensure maximum adherence of the subsequent coating material 3.3.2 filler mouldable material for smoothing out uneven surfaces or cavities (e.g. complicated shapes) to allow for the void-free application of tapes or shrinkable materials NOTE Fillers will be selected by mutual agreement between manufacturer and user. 3.3.3 additional mechanical protection materials various materia
