1、DEUTSCHE NORM March 1999 External organic coatings for the corrosion protection of buried or immersed steel pipelines used in conjunction with cathodic Drotection DIN - ICs 23.040.99; 25.220.60 Descriptors: Cathodic protection, organic coatings, steel pipelines. Supersedes parts of September 1991 ed
2、ition. DIN 30672-1, Kathodischer Korrosionsschutz - Organische Umhllungen fr den Korrosionsschutz von in Bden und Wssern verlegten Stahlrohrleitungen im Zusammenwirken mit kathodischem Korrosionsschutz - Bnder und schrumpfende Materialien European Standard EN 12068 : 1998 has the status of a DIN Sta
3、ndard. A comma is used as the decimal marker. This standard has been included in the body of DVGW Codes of practice for gas and water. National foreword This standard has been prepared by CEN/TC 262. The responsible German body involved in its preparation was the Normenausschu Gastechnik (Gas Tech-
4、nology Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard(s) IS0 188 DIN 53508 IS0 2808 IS0 3251 IS0 4593 DIN 53370 IS0 4626 DIN 531 71 IS0 4892-2 IS0 1523 DIN 53213-1 DIN EN IS0 2808*) DIN
5、EN IS0 3251 IS0 281 1 DIN 53217-2 IS0 4892-1 DIN 53387 DIN 53387 and DIN EN IS0 4892-2*) Amendments Parts of DIN 30672-1, September 1991 edition, have been superseded by the specifications of EN 12068. Previo us edit ions DIN 30672: 1976-09, 1979-08; DIN 30672-1 : 1991 -09. Standards referred to (an
6、d not included in Normative references) DIN 531 71 DIN 5321 3-1 Volatile organic fluids - Determination of boiling range Determination of the flashpoint of paints and varnishes and similar solvent-borne products by the closed cup method *) At present at draft stage. Continued overleaf. EN comprises
7、46 pages. I Q No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 12068 : 1999-03 Sales No. 1115 09.99 DIN Deutsches Institut fur Normung e. V., Berlin. Beuth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). Englis
8、h pricegroup 15 Page 2 DIN EN 12068 : 1999-03 DIN 5321 7-2 Determination of density of paints, varnishes and similar coating materials - Survey of test methods DIN 53370 Determination of plastic film and sheeting thickness by mechanical scanning DIN 53387 Artificial weathering and ageing of plastics
9、 and elastomers by exposure to filtered xenon arc rad at i on DIN 53508 Accelerated ageing of rubber DIN EN IS0 2808 Paints and varnishes - Determination of film thickness (IS0 2808 : 1997)*) DIN EN IS0 3251 Paints and varnishes - Determination of non-volatile matter of paints, varnishes and bind- e
10、rs for paints and varnishes (IS0 3251 : 1993) DVG W-Merkblatt GW O1 4 Ausbesserung von Fehlstellen in Korrosionsschutzumhllungen von Rohren aus fisenwerkstoffen (Repairing corrosion protection coatings (tape and sleeving) on iron pipes) *) At present at draft stage. EUROPEAN STANDARD NORME EUROPENNE
11、 EUROPISCHE NORM EN 12068 August 1998 ICs 23.040.99; 25.220.60 Descriptors: Cathodic protection, organic coatings, steel pipelines. English version Cathodic protection External organic coatings for the corrosion protection of buried or immersed steel pipelines used in conjunction with cathodic prote
12、ction Tapes and shrinkable materials Protection cathodique - Revtements organiques extrieurs pour la protec- tion contre la corrosion de tubes en acier enterrs ou immergs en conjonction avec la protection cathodique - Bandes et matriaux rtractables und schrumpfende Materialien Kathodischer Korrosion
13、sschutz - Organische Umhllungen fr den Korrosionsschutz von in Bden und Wssern verlegten Stahlrohrleitungen im Zusammenwirken mit katho- dischem Korrosionsschutz - Bnder This European Standard was approved by CEN on 1998-07-1 8. CEN members are bound to comply with the CENKENELEC Internal Regulation
14、s 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 stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The Europe
15、an Standards exist 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 Central Secretariat has the same status as the official versions. CEN members are the nation
16、al standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisatio
17、n Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 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 Page 2 EN 12068 : 1998 Contents Page Page Foreword . 3 Introduction
18、3 1 Scope . 4 2 Normative References . 4 3 Definitions . 5 4 Classification and designation 7 5 Requirements 9 6 Quality 15 Annex A (normative) Tape strength, elongation at break, modulus at 1 O % elongation, bursting strength . 16 Annex B (normative) Peel strength layer to layer . 18 Annex C (norma
19、tive) Peel strength to pipe surface and factory coating . 20 Annex D (normative) Lap shear strength . 21 Annex E (normative) Thermal ageing resistance . 23 Annex G (normative) Indentation resistance 27 Annex H (normative) Impact resistance . 29 Annex J (normative) Specific electrical insulation resi
20、stance 31 Annex K (normative) Cathodic disbondment resistance . 33 Annex L (informative) Saponification value . 36 Annex M (normative) Microbiological resistance . 37 Annex N (normative) Annex P (normative) Low temperature flexibility 40 Low temperature unrolling test . 45 Annex Q (normative) Drip r
21、esistance of petrolatum tapes . 46 Annex F (normative) Ultraviolet irradiation resistance . 26 Page 3 EN 12068: 1998 Foreword This European Standard has been prepared by Technical Committee CENFC 21 9 ?Cathodic protection?, the secretariat of which is held by BSI. This European Standard shall be giv
22、en 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 CENKENELEC Internal Regulations, the national standards organizat
23、ions 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. Introduction This Europea
24、n Standard gives requirements for organic coatings based on tapes 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 secreta
25、riat of which is held by DIN. There is a liaison between CENTTC 262/SC WG 6 and ECISSTTC 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 en
26、sure compatibility of the organic coatings with cathodically protected pipelines, tests of cathodic disbonding resistance at continuous operating temperature are specified. Test requirements are given for 23 OC but due to limited data available to WG 6 it is intended that values for higher temperatu
27、res 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 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
28、 a burial in soil is the only satisfactory test method. The described test method is proposed for the interim period of five years. Page 4 EN 12068 : 1998 1 Scope This standard specifies the functional requirements and test methods for external organic coatings based on tapes or shrinkable materials
29、 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 operating temperatures. Coatings for special installation conditions are also considered. A comprehensive classification
30、 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 this standard. This European standard is not applicable to special applications in off-shore and stress loads caused by f
31、requent temperature changes. Specifications of fillers are outside the scope of this 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
32、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 incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to app
33、lies. prEN 1427 Petroleum products - Bitumen and bituminous binders - Determination of the softening point - Ring and ball method Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets (ISO/DIS 527-3:1995) Preparation of steel substrates before application of p
34、aints and related products - Surface roughness characteri- stics of blast-cleaned steel substrates - Part 2: Method for the grading of surface profile of abrasive blast-cleaned steel - Comparator procedure (IS0 8503-2:1988) EN IS0 527-311995 EN IS0 8503-2 EN IS0 9000-1 Quality management and quality
35、 assurance standards - Guidelines for selection and use EN IS0 9000-2 Quality management and quality assurance standards - Generic guidelines for the application of IS0 9001, IS0 9002 and IS0 9003 EN IS0 9001 Quality systems - Model for quality assurance in design/development, production, installati
36、on and servicing EN IS0 9002 Quality systems - Model for quality assurance in production, installation and servicing EN IC0 9003 Quality systems - Model for quality assurance in final inspection and test ISO/DIS 188 Rubber, vulcanised - Accellerated ageing and heat resistance tests IS0 1523 Paints,
37、varnishes, petroleum and related products - Determination of flashpoint - Closed cup equilibrium method IS0 2808 Paints and varnishes - Determination of film thickness IS0 281 1 Paints and varnishes - Determination of density IS0 3251 Paints and varnishes - Determination of non-volatile matter of pa
38、ints, varnishes and binders for paints and varnishes Page 5 EN 12068: 1998 IS0 3303:1990 Rubber- or plastics-coated fabrics - Determination of bursting strength IS0 3801 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area IS0 4591 Plastics - Film and sheeting - De
39、termination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness) IS0 4593 Plastics - Film and sheeting - Determination of thickness by mechanical scanning IS0 4626 Volatile organic liquids - Determination of boiling range IS0
40、4892-1 Plastics - Methods of exposure to laboratory light sources - Part 1 : General guidance IS0 4892-2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources IS0 5893 Rubber and plastics test equipment - Tensile, flexural and compression types (consistant rate of tr
41、averse) - Description IS0 7254 Paints and varnishes - Assessment of natural spreading rate - Brush application IS0 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 unc
42、oated steel substrates and of steel substrates afier overall removal of previous coatings 3 Definit ions For the purposes of this standard, the following definitions apply 3.1 external organic coatings 3.1 .I coating One or several layers of materials applied to the pipe in the form of tapes (spiral
43、 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 in 3.2. Prirner(s) and/or filler(s) can be used in conjunction with these coating materials t
44、o 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 Coaling primarily constituted to protect the inner layer from mechanical stresses. Page 6 EN 12068 : 1998 3.2 basic types of coating ma
45、terials 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 backing film. 3.2.2 bituminous tape (hot applied) Corrosion protect
46、ion 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 generally bonded to a flexible polymer film and may contain a synthetic
47、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 compound may be reinforced with synthetic fibres. 3.2.3.2 reinfo
48、rced 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 consisting only of an adhesive compound. It may contain a fle
49、xible polymer film (thickness 5 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 with an adhesive. The polymer backing can be reinforced. Shrinkable materials are available as: - tubular sleeves; - - tapes; - pre-shaped materials. wraparound sleeves with either separate or attached closure; 3.3 complementary materials 3.3.1 primer Material applied (generally in a liquid form) as a thin film over a prepared metal sur
