1、 Reference number ISO 21809-4:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 21809-4 First edition 2009-11-15 Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems Part 4: Polyethylene coatings (2-layer PE) Industries du ptrole e
2、t du gaz naturel Revtements externes des conduites enterres ou immerges utilises dans les systmes de transport par conduites Partie 4: Revtements base de polythylne (PE bicouche) ISO 21809-4:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing poli
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7、va 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 21809-4:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword .v Introductionvi 1 Scope1 2 Normative references1 3 Terms and definitions .2
8、4 Abbreviated terms .4 5 General requirements .4 5.1 Rounding4 5.2 Compliance with this part of ISO 21809 4 6 Information supplied by the purchaser.4 6.1 General information 4 6.2 Additional information 5 7 Coating classification .5 7.1 General .5 7.2 Coating systems5 7.3 Coating thickness classes6
9、8 Materials .6 8.1 Pipe .6 8.2 Coating materials 7 8.3 Packaging.9 9 Coating qualification .9 10 Application .10 10.1 General .10 10.2 Surface preparation.10 10.3 Pipe temperature .11 10.4 Application of adhesive 11 10.5 Application of polyethylene11 10.6 Cutback.11 11 Inspection and testing 11 11.1
10、 Inspection.11 11.2 Testing11 12 Repair of coated pipe 14 12.1 Rectification of below-thickness coating14 12.2 Repair15 12.3 Stripping and recoating 15 13 Markings.15 13.1 General .15 13.2 Required markings 15 14 Handling and storage in the coating area.15 14.1 Handling .15 14.2 Storage .16 15 Test
11、reports and certificates of compliance.16 Annex A (normative) UV ageing test and thermal ageing test.17 ISO 21809-4:2009(E) iv ISO 2009 All rights reservedAnnex B (normative) Cathodic disbondment test .19 Annex C (normative) Impact test .24 Annex D (normative) Indentation test .26 Annex E (normative
12、) Flexibility test 27 Annex F (normative) Peel strength test 29 Annex G (normative) Peel strength test Hanging mass .31 Bibliography 34 ISO 21809-4:2009(E) ISO 2009 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards
13、bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizat
14、ions, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in th
15、e ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of
16、the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21809-4 was prepared by Technical Committee ISO/TC 67, Material
17、s, equipment and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transportation systems. ISO 21809 consists of the following parts, under the general title Petroleum and natural gas industries External coatings for buried or submerged pipeline
18、s used in pipeline transportation systems: Part 1: Polyolefin coatings (3-layer PE and 3layer PP) Part 2: Fusion-bonded epoxy coatings Part 3: Field joint coatings Part 4: Polyethylene coatings (2-layer PE) Part 5: External concrete coatings ISO 21809-4:2009(E) vi ISO 2009 All rights reservedIntrodu
19、ction It is necessary that users of this part of ISO 21809 be aware that further or differing requirements can be needed for individual applications. This part of ISO 21809 is not intended to inhibit a vendor from offering, or the purchaser from accepting, alternative equipment or engineering soluti
20、ons for the individual application. This can be particularly applicable where there is innovative or developing technology. Where an alternative is offered, it is the responsibility of the vendor to identify any variations from this part of ISO 21809 and provide details. INTERNATIONAL STANDARD ISO 2
21、1809-4:2009(E) ISO 2009 All rights reserved 1Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems Part 4: Polyethylene coatings (2-layer PE) 1 Scope This part of ISO 21809 specifies the requirements for qualification, applic
22、ation, inspection, testing, handling and storage of materials for plant application of two-layer polyethylene coatings (2-layer PE) applied externally for the corrosion protection of bare steel pipe for use in pipeline transportation systems for the petroleum and natural gas industries as defined in
23、 ISO 13623. NOTE Pipes coated in accordance with this part of ISO 21809 are considered suitable for additional protection by means of cathodic protection. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the
24、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 31-0:1992, Quantities and Units Part 0: General principles ISO 62, Plastics Determination of water absorption ISO 306, Plastics Thermoplastic materials Determination o
25、f Vicat softening temperature (VST) ISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 527-3, Plastics Determination of tensile properties Part 3: Test conditions for films and sheets ISO 868, Plastics and ebonite Determination of
26、indentation hardness by means of a durometer (Shore hardness) ISO 1133, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics ISO 1872-2, Plastics Polyethylene (PE) moulding and extrusion materials Part 2: Preparation of test specimens and dete
27、rmination of properties ISO 1183 (all parts), Plastics Methods for determining the density of non-cellular plastics ISO 4625-1, Binders for paints and varnishes Determination of softening point Part 1: Ring-and-ball method ISO 4892-2:2006, Plastics Methods of exposure to laboratory light sources Par
28、t 2: Xenon-arc lamps ISO 21809-4:2009(E) 2 ISO 2009 All rights reservedISO 8501-1:2007, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel subs
29、trates after overall removal of previous coatings ISO 8502-3:1992, Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method) ISO
30、 8502-6, Preparation of steel substrates before application of paints and related products Tests for the assessment of surface cleanliness Part 6: Extraction of soluble contaminants for analysis The Bresle method ISO 8502-9, Preparation of steel substrates before application of paints and related pr
31、oducts Tests for the assessment of surface cleanliness Part 9: Field method for the conductometric determination of water- soluble salts ISO 8503-4:1988, Preparation of steel substrates before application of paints and related products Surface roughness characteristics of blast-cleaned steel substra
32、tes Part 4: Method for the calibration of ISO surface profile comparators and for the determination of surface profile Stylus instrument procedure ISO 8503-5:2003, Preparation of steel substrates before application of paints and related products Surface roughness characteristics of blast-cleaned ste
33、el substrates Part 5: Replica tape method for the determination of the surface profile ISO 10474, Steel and steel products Inspection documents ISO 11124 (all parts), Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasive
34、s ISO 11125 (all parts), Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives ISO 11357-6, Plastics Differential scanning calorimetry DSC Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation i
35、nduction temperature (dynamic OIT) ISO 13623, Petroleum and natural gas industries Pipeline transportation systems ISO 15512, Plastics Determination of water content ASTM D1693, Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics ASTM D3236, Standard Test Method for Apparent
36、Viscosity of Hot Melt Adhesives and Coating Materials SSPC-SP1, Solvent Cleaning 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 applicator company that undertakes the coating application in accordance with the provisions of this part of ISO
37、21809 NOTE If the compounding of the top layer is done prior to or during the application process by the applicator, then he is considered as manufacturer (see 3.7). 3.2 batch quantity of coating material as defined by the manufacturer ISO 21809-4:2009(E) ISO 2009 All rights reserved 33.3 batch cert
38、ificate certificate of analysis issued by the manufacturer 3.4 certificate of compliance one of the types of documents defined by ISO 10474 that is issued in accordance with the purchase requirements 3.5 cutback length of pipe left uncoated at each end for joining purposes 3.6 holiday coating discon
39、tinuity that exhibits electrical conductivity when exposed to a specific voltage 3.7 manufacturer company responsible for the manufacture of coating material(s) 3.8 manufacturers specification document that specifies the characteristics, test requirements and application recommendations for the coat
40、ing materials 3.9 maximum design temperature maximum temperature that the coating can be exposed to during operation 3.10 pipe diameter length any length along the pipe axis equal to the specified outside diameter of the pipe 3.11 pipeline those facilities through which fluids are conveyed, includin
41、g pipe, pig traps, components and appurtenances, up to and including the isolating valves ISO 13623 3.12 pipeline transportation system pipeline with compressor or pump stations, pressure control stations, flow control stations, metering, tankage, supervisory control and data acquisition system (SCA
42、DA), safety systems, corrosion protection systems, and any other equipment, facility or building used in the transportation of fluids 3.13 purchaser company responsible for providing the product order requirements 3.14 test report document that provides the quantitative test results for tests conduc
43、ted in accordance with the requirements of this part of ISO 21809 3.15 test ring sample taken from production coated pipe ISO 21809-4:2009(E) 4 ISO 2009 All rights reserved4 Abbreviated terms BST black standard temperature ESCR environmental stress cracking resistance MFR melt flow rate; designated
44、as symbol q MFRfor use in mathematical expressions and equations PE polyethylene ppd per pipe diameter SAW submerged arc welding UV ultraviolet 2LPE 2-layer polyethylene coating 5 General requirements 5.1 Rounding Unless otherwise stated in this part of ISO 21809, to determine conformance with the s
45、pecified requirements, observed or calculated values shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with ISO 31-0:1992, Annex B, Rule A. NOTE For the purpose of this provision, the rounding method of ASTM E29 is equiv
46、alent to ISO 31-0:1992, Annex B, Rule A. 5.2 Compliance with this part of ISO 21809 A quality system and an environmental management system should be applied to assist compliance with the requirements of this part of ISO 21809. NOTE ISO/TS 29001 gives sector-specific guidance on quality management s
47、ystems and ISO 14001 gives guidance on the selection and use of an environmental management system. The applicator shall be responsible for complying with all of the applicable requirements of this part of ISO 21809. It shall be permissible for the purchaser to make any investigation necessary in or
48、der to be assured of compliance by the applicator and to reject any material and/or coating that does not comply. 6 Information supplied by the purchaser 6.1 General information The purchase order shall include the following information: a) the number of this part of ISO 21809 and year of publicatio
49、n (ISO 21809-4:2009); b) pipe quantity, outside diameter, minimum wall thickness, minimum, maximum and nominal length; grade of steel; c) bare pipe standard or specification designation, e.g. ISO 3183; d) coating system classification and thickness; ISO 21809-4:2009(E) ISO 2009 All rights reserved 5e) cutback length and tolerances for both ends of pipe; f) pipeline maximum design temperature, in degrees Celsius; g) test temperat
