1、STD-BSI BS EN 120b-ENGL 1999 m Lb24bL 077950q 3T BRITISH STANDARD 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 The European Standard EN 12068:1!398 has
2、the status of a British standard ICs 23.040.99; 25.220.60; 77.060 BS EN 12068:1999 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW - STD=SSI BS EN 120bd-ENGL 1777 W Lb24bb9 0779585 24b Mon of the Engineering Amd. No. sector Committee, was published under the authority of the S
3、tandards Committee and comes into effect on 15 May 1999 BS EN 12068:1999 Date Text afected National foreword This British Standard is the English language version of EN 12068: 1998. The UK participation in its prepamtion was entrusted to Technical Committee ISW16, Protective coatings and linings of
4、metal pipes and fittings, which has the responsibility to: to: - aid enquirers to understand the tee - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK
5、interests informed, 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 publications referred to in this document may be found in the BSI Standards Catalogu
6、e under the section entitled “Jnternational Stan 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, confor
7、mity tests, tests English veision Cathodic protection - Ekkmal organic coatings for the corrosion prokction of buried or immersed steel pipelines used in conjunction with cathodic protection - 2qes and shrinkable materials protection cathodique - Revtements organiques exkrieus pour ia protection con
8、tre ia corrosion de tubes en acier enterrs ou immergs en coqjonction avec ia protection cztthdque - Bandes et matriauXr-1es Kathodischer Korrosionsschutz - Organische Umhullungen fur den Korrosionsschutz von in Bden und WasSem verlegten Stahlrohrleitungen im Zusammenwirken mit kathodischem Korrosion
9、sschutz - Bander und schrumpfende Matedien This European Standard was approved by CEN on 18 July 1998. CEN members are bound to comply with the CENKENELEC Inkmal Regulations which stipuia the conditions for giving this European Standard the status of a national standard without any alteration Up-to-
10、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 tsanslation under t
11、he responsibility of a CEN member into its own language and notifed to the Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembou
12、rg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Stanmion Comit Europen de Normalisation Europisches Komitee fur Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1998 CEN AU rights of exploitation in any form and by any means
13、reserved worldwide for CEN national Members. Ref. No. EN 12068:1998 E STD-BSI BS EN 120b8-ENGL 1999 = LbZqbbS 0779587 019 Page 2 EN 12068:1998 Foreword This European Standard has been prepared by Technical Committee CENirC 219, Cathodic protection, the Secretariat of which is held by BSI. This Europ
14、ean 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 conllicng national standards shall be withdrawn at the latest by February 1999. According to the CEN/CENELEC Internal Regulations, the nati
15、onal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Irelaaid, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
16、Contents Foreword Introduction 1 Scope 2 Normative references 3 Definitions 4 Classification and designation 5 Requirements Annex A (normative) Tape strength, elongation at break, modulus at 10 % elongation, bursting strength Annex B (normative) Peel strength layer to layer Annex C (normative) Peel
17、strength to pipe surface and factory coating Annex D (normative) Lap shear strength Annex E (normative) Thennal ageing resistance Annex F (normative) Ultraviolet irradiation resistance Annex G (normative) Indentation mistance Annex H (normative) impact resistance Annex J (normative) Specific elecric
18、al insulation resistance Annex K (normative) Cathodic disbondment resisance Annex L (iormative) Saponification value Annex M (normative) Microbiological resistance Annex N (normative) Low temperature flexibility Annex P (normative) Low temperature unrolling test Annex Q (normatike) Drip resistance o
19、f petrolatum tapes 6 it may contain an additional backing fim 3.2.2 bituminous tape (hot applied) corrosion protection tape consisting of giass or synthetic reinforcement coated on both sides with a bituminous compound 3.2.3 polymeric tape (cold or hot applied) corrosion protection tape consisting o
20、f a compound highly adhesive to the adhesive 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 stre
21、ngth polymeric tape corrosion protection tape consisting only of an adhesive compound; it may contain a flexible polymer film (thickness 5 0,15 nun) to avoid overstretching duringapplication 3.2.4 shrinkable material corrosion protection product consisting of a polymer backing capable of controlied
22、shnnking, 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 materi
23、al applied (generally in a liquid form) as a thin film over a prepared metal surface and the dacent 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 fo
24、r the voicl-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 materials to enhance impact and indentation resistance and/or isolate movements between coated pipel
25、ines and surrounding soil Any additional mechanical protection not completely bonded to the coating below is either perorated or electrical conductive under operating conditions to avoid screening of cathodic protection. O BSI 05-1999 STDoBSI BS EN L20bA-ENGL 1999 9 Lb24bb9 0779590 b03 3.4 repair ma
26、terial material used to reconstitute the coating at places where mechanical damage has occured. It may be hot or cold applicable mate - indentation resistance; - specific electrid insulation resistance; - cathodic disbondment resistance; - peel strength layer to layer, - peel strength to pipe surfac
27、e and factory coating. Coatings shall meet requirements for the foliowing classes as specified in Table 1. 4.1.2.2 Class A Coating which has a low mechanical resistance. 4.1.2.3 Class B Coating which has a medium mechanical raistance. 4.1.2.4 Class C Coating which has a high mechanical resistance. T
28、hree alternative combmations of requirements are specified for cathodic disbondment resistance, peel strength layer to layer and peel strength to pipe surface and factory coating. Page 5 EN 12068:1998 4.1.3 Maximum continuoui operating temperature classes 4.1.3.1 Geneml Coatings m ciassiied accordin
29、g to their maximum continuous operating temperature specified by the following tests (where applicable): - indentation resistance; - cathodic disbondment resistance; - peel strength layer to layer, - peel strength to pipe surface and factory com; - lap shear stsength; - thermai ageing resistance. Co
30、atings shall meet the requirements for the maximum continuous operating temperature classes as specified in Wles 1 and 2. 4.1.3.2 Class30 In the absence of any specific indication, coatings shad be considered suitable for use at maximum continuous operating temperature Tmax up to 30 OC. 4.1.3.3 clas
31、s50 Coatings in this class shali be suitable for use at maximum continuous operating temperature 4.1.3.4 ClassHT Coatings in this class shall be suitable for use at maximum continuous operating temperature Tm 50 OC in increments of 10 “C. This temperature shall be stated in brackets. 4.1.4 Classes f
32、or special application conditions 4.1.4.1 class Ums VL 4.1.4.1.1 General For these classes of coatings it shall be possible to handle products and the coated pipe at temperatures below -5 “C. They shall meet the requirements specified in Wle 2. 4.1.4.1.2 Class L For low temperatures between -20 OC a
33、nd -5 OC. 4.1.4.1.3 class VL For very low temperatures lower than -20 OC. In this case, the minimum handling and laying temperature shall be agreed between user and manufacturer. This temperature shall be stated in brackets. 4.1.4.2 Class W Coatings in this class shall be suitable for storage for pr
34、olonged periods while exposed to sunlight and shall comply with the resistance to ultraviolet irradiation required in Wle 2. Tmax = 50 OC. O BSI 05-!999 STD=BSI BS EN 120bB-ENGL 1999 = LbZVbbS 0779593 5VT Page 6 EN 12068:1998 4.2 Designation 5 Requirements 5.1 Requirements for coatings Coatings shal
35、l be designated as foiows: EN - Mechanicxi lass - Maximum coatings s meet the requirements for the particular special application conditions (i applicable). Peg lass - lass for as in mies 1 and 2. EXAMPLE 1 Designation of a coating of meium mechanical resistance (class B) for temperatures up to 30 O
36、C (ciass 30): EXAMPLE 2 Designation of a coating of high mechanical resistance (class C) which is suitable for use up to 50 OC (ch 50) and for handling and laying at low temperatures between -20 OC and -5 OC (ciass L): EXAMPLE 3 Designation of a coating of high mechanical resistance (class C) which
37、is suitable for use up to 60 OC (class “I) with proven ultraviolet irradiaion resistance (ciassw): coating EN 1268-B 30. coating EN 12O8-C 50 L. coating EN 120S-C “i 60 rn! O BSI 051999 STD-BSI BS EN L20b-ENGL 1977 Lb24bb9 0777572 Li8b Property Operating tempera- ture class Specific electrical insul
38、ation resistance 4100 41 d 5.31 6 6.1 6.2: 6.21 6.3 6.4 7 7.12 7.11: 7.2 7.3 7.4 7.5 3 3.1 - 3.2 - Property We name Description of coating materiai Colour Minimum total thickness or Mass per unit area Polymeric film/reinforcement Generic type of polymeric film Generic type of reinforcement material
39、Nominal thickness or Mass per unit area Adhesive Generic type of adhesive Nominal thickness or Mass per unit area Saponification value Softening point ring and ball2) Mechanicai properties of component me strength or Bursting strength Modulus at 10 % elongationz) Elongahon at break2) Low temperature
40、 flexibilityz) (class L and VL only) Shrinkage (shrinkable materiai 0niy3) Storage conditions 3torage temperature minimum maximum Shelf life at storage Emperature Unit Test method - - - IS0 459u IS0 4593 IS0 3801 - - - SO 4591/ SO 4593 SO 3801 - - so 459u SO 4593 SO 3801 hex L prEN 142: - hex A hex
41、A hex A hex A hex N o - - - - - ) Data to be supplied for each coating component. If applicable. In according with manufacturers test method. No. 1 1.1 1.2 1.3 2 2.1 2.1.1 2.1.2 2.2 3 3.1 3.2 3.3 3.4 3.5 4 4.1 4.2 4.3 5 5.1 5.2 5.3 6 6.1 6.2 6.3 6.4 item 7. To be Table 7 - Application instructions P
42、roperty Ambient conditions Minimum temperature Maximum temperature Relative humidity Surface preparation Metal surface Cleanllliess (in according with IS0 8501-1) Profile (in according with IS0 8503-2) Factory coating Application of primer Method of application Surface temperature minimum maximum Po
43、tlife Overcoating time minimum Curing temperature Application of tape Method of application Minimum product temperature (in accordance with annex P) Minimum overlap of tape Application of shrinkable material Surface temperature Method of preheat Shrink temperature Senerai Minimum overlap on factory
44、Specic application instnictions Holiday detection voltage Flepair procedures maximum roating) Unit OC “C % - - - - - OC “C h h or min dorh OC - OC 36 IC )C - mm - CV - ren for each compatible factory coating in Table 3, O BSI O51999 STDDBSI BS EN LZUbA-ENGL 1999 Lb24bb9 077957b 021 Annex A (normativ
45、e) ape strength, elongation at break, modulus at 10% elongation, bursting strength A.l General “he test method consists of measuring the value of tape strength (n-dmum force per unit width), elongation at break and modulus (tensile force per unit width) at 10 96 elongation of tapes with and without
46、reinforcement and shrinkable materials without reinforcement in accordance with EN IS 527-3. Shrinkable materiais with reinforcement shaii be measured for buisting strength in accordance with method A of IS0 33031990. A.2 Apparatus Tensile testing muchine, in accordance with IS0 5893 allowing the st
47、res-strain curve to be recorded and capable of operating at a constant rate of separation or compression of the clamps of 100 mm/min. A.3 Preparation of the test specimens A.3.1 mpes with or without reirlforcement and shrinkable materials without reir2forcement A.3.1.1 ip with or without reinforneme
48、nt Sample tapes as delivered after conditioning for 24 h at (23 2) “C. Discard the three outer turns from the roll. Unwind sufficient tape to cut five specimens in the longitudinai direction. Conition this length of tape for aminimum of 1 h at (23I2)“C on a flat surface. a) ?apes without reinforceme
49、nt: prepare five test specimens type 5 in accordance with Figure 2 of EN IS0 52731995. b) mes with reinforcement: prepare five rectanguar test specimens, 200 mm long and 50 mm wide or the tape width if narrower. A.3.1.2 Shrhhbe material without reinforcement Sample shrinkable materiai by free duinking in accordance with the manufacturers instruction. We specimens circumferentially and condition for a minimum of 1 h at (23 2) “C. Prepare five test specimens of type 5 in accordance with Figure 2 of EN IS0 5273: 1995. A.3.2 Shrin
