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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 materials Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority
4、of the Standards Committee and comes into effect on 15 May 1999 BSI 05-1999 ISBN 0 580 30229 6 BS EN 12068:1999 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 12068:1998. The UK participation in its preparat
5、ion was entrusted to Technical Committee ISE/16, Protective coatings and linings of metal pipes and fittings, 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 kee
6、p the UK interests informed; monitor related international and European developments and promulgate them in 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 publ
7、ications referred to in this document may be found in the BSI Standards Catalogue under the section entitled 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 provisi
8、ons of a contract. Users of British Standards are responsible for their correct application. Compliance 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,
9、an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B
10、-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 STANDARDEN 12068 NORME EUROPE ENNE EUROPA ISCHE NORM August 1998 ICS 23.040.99; 25.220.60 Descriptors: metal protection, corrosion prevention
11、, electrochemical corrosion, organic coatings, adhesive tapes, cathodic protection, buried pipes, submerged construction, steel tubes, specifications, operating requirements, quality, conformity tests, tests English version Cathodic protection External organic coatings for the corrosion protection o
12、f 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 de tubes en acier enterre s ou immerge s en conjonction avec la protection cathodique Band
13、es 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 Korrosionsschutz Ba nder und schrumpfende Materialien This European Standard was approved by CEN o
14、n 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 alteration. Up-to-date lists and bibliographical references concerning such national standards may
15、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 translation under the responsibility of a CEN member into its own language and notified to the Centr
16、al 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, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom
17、. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 Europe
18、an Standard shall 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 nat
19、ional standards organizations 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.
20、Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions4 4Classification and designation5 5Requirements6 6Quality9 Annex A (normative) Tape strength, elongation at break, modulus at 10 % elongation, bursting strength11 Annex B (normative) Peel strength layer to layer12 Anne
21、x C (normative) Peel strength to pipe surface and factory coating13 Annex D (normative) Lap shear strength13 Annex E (normative) Thermal ageing resistance14 Annex F (normative) Ultraviolet irradiation resistance16 Annex G (normative) Indentation resistance17 Annex H (normative) Impact resistance18 A
22、nnex J (normative) Specific electrical insulation resistance19 Annex K (normative) Cathodic disbondment resistance20 Annex L (informative) Saponification value21 Annex M (normative) Microbiological resistance22 Annex N (normative) Low temperature flexibility23 Annex P (normative) Low temperature unr
23、olling test28 Annex Q (normative) Drip resistance of petrolatum tapes28 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12068:1998 BSI 05-1999 Introduction This European Standard gives requirements for organic coatings based on tap
24、es or shrinkable materials for corrosion protection of buried or immersed pipelines, used in conjunction 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
25、262/SC 2/WG 6 and ECISS/TC 29/SC 4, to harmonize the standards prepared in both committees. This 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 p
26、rotected pipelines, tests of cathodic disbonding resistance at continuous operating temperature are specified. Test requirements are given for 23 8C 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 t
27、o the fact that degradation of the properties of a coating may occur following attack from microbiological 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 de
28、scribed test method is proposed for the interim period of five years. 1 Scope This standard specifies 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 conjun
29、ction with cathodic protection. It classifies coatings by increasing mechanical resistance and operating temperatures. Coatings for special installation conditions are also considered. A comprehensive classification of coatings in relation to functional requirements is defined. Tapes and shrinkable
30、materials which meet the requirements of these classes can belong to various types defined in this 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
31、European Standard. 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, subsequent amen
32、dments to or revisions of any of these publications apply to this European Standard only when incorporated 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 t
33、he softening point Ring and ball method. EN ISO 527-3:1995, Plastics Determination of tensile properties 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 characteristi
34、cs of blast-cleaned steel substrates Part 2: Method for the grading of surface profile of abrasive 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 qua
35、lity assurance standards Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 9003. 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, installa
36、tion and servicing. EN ISO 9003, Quality systems Model for quality assurance in final inspection 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 meth
37、od. ISO 2808, Paints and varnishes Determination of film thickness. ISO 2811, Paints and varnishes 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 fabric
38、s Determination of bursting strength. ISO 3801, Textiles Woven fabrics Determination of mass per 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
39、thickness). ISO 4593, Plastics Film and sheeting Determination of thickness by mechanical scanning. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 15:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12068:1998 BSI 05-1999 ISO 4626, Volatile organic liquids Determination of boiling
40、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 5893, Rubber and plastics test equipment Tensile, flexural and compression types (consistant rate
41、 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 products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoa
42、ted 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 3.1.1 coating one or several layers of materials applied to the pipe in the form of tapes (spiral o
43、r 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 in 3.2. Primer(s) and/or filler(s) can be used in conjunction with these coating materials to impr
44、ove 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 inner layer from mechanical stresses 3.2 basic types of coating materials 3.2.1 petrolatum tape (c
45、old 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 backing film 3.2.2 bituminous tape (hot applied) corrosion protection tape consisting of glass or s
46、ynthetic 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 generally bonded to a flexible polymer film and may contain a synthetic reinforcement, these tapes can be
47、 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 compound may be reinforced with synthetic fibres 3.2.3.2 reinforced polymeric tape corrosion prot
48、ection 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 consisting only of an adhesive compound; it may contain a flexible polymer film (thickness # 0,1
49、5 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 with 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 (g
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