ISO 21809-3:2008

INTERNATIONAL ISO
STANDARD 21809-3
First edition
2008-12-15


Petroleum and natural gas industries —
External coatings for buried or
submerged pipelines used in pipeline
transportation systems —
Part 3:
Field joint coatings
Industries du pétrole et du gaz naturel — Revêtements externes des
conduites enterrées ou immergées utilisées dans les systèmes de
transport par conduites —
Partie 3: Revêtements des joints soudés sur site





Reference number
ISO 21809-3:2008(E)
©
ISO 2008

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ISO 21809-3:2008(E)
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ii © ISO 2008 – All rights reserved

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ISO 21809-3:2008(E)
Contents Page
Foreword. vi
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 4
4 Symbols and abbreviated terms . 6
4.1 Symbols . 6
4.2 Abbreviated terms . 7
5 General requirements. 7
5.1 Rounding . 7
5.2 Compliance to standard. 7
6 Information to be supplied by the purchaser . 8
6.1 General information. 8
6.2 Additional information. 8
7 Application procedures and qualification. 9
7.1 Application procedure specification (APS). 9
7.2 Coating materials. 9
7.3 Procedure qualification trial (PQT) . 10
7.4 Pre-production trial (PPT) . 11
7.5 Qualification of coating and inspection personnel . 11
7.6 Production testing and inspection. 11
7.7 Certificates of compliance and traceability .12
8 Classification of field joint coatings . 12
9 General requirements for surface preparation, coating application, testing and repair. 13
9.1 Surface preparation. 13
9.2 Application of the coating. 14
9.3 Visual inspection of the applied coating. 14
9.4 Testing of the field joint coating . 14
9.5 Repairs. 15
9.6 Verification and storage of coating materials. 15
10 Bituminous, petrolatum, wax and polymeric tape coatings. 15
10.1 Coating identification . 15
10.2 Description of the coatings . 15
10.3 Surface preparation. 15
10.4 Coating application. 16
10.5 Testing of the applied coatings. 17
11 Heat-shrinkable coatings . 25
11.1 Coating identification . 25
11.2 Description of the coatings . 25
11.3 Surface preparation. 26
11.4 Application of the coatings. 26
11.5 Testing of the applied coatings. 27
12 Fusion-bonded epoxy (FBE) powder coatings . 31
12.1 Coating identification . 31
12.2 Description of the coatings . 32
12.3 Surface preparation. 32
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ISO 21809-3:2008(E)
12.4 Application of the coatings. 32
12.5 Testing of the applied coatings . 33
13 Liquid coatings. 35
13.1 Coating identification . 35
13.2 Description of the coatings. 35
13.3 Surface preparation . 35
13.4 Application of the coatings. 36
13.5 Testing of the applied coatings . 36
14 Polyolefin-based coatings. 41
14.1 Coating identification . 41
14.2 Description of the coatings. 41
14.3 Surface preparation . 42
14.4 Application of the coating. 43
14.5 Testing of the applied coatings . 44
15 Thermal spray aluminium (TSA) coatings . 49
15.1 Coating identification . 49
15.2 Description of the coating. 49
15.3 Qualification. 49
15.4 Surface preparation . 49
15.5 Application of the coating. 49
15.6 Testing of the applied coating . 50
16 Hot-applied microcrystalline wax coatings . 51
16.1 Coating identification . 51
16.2 Description of the coating. 52
16.3 Surface preparation . 52
16.4 Application of the coating. 52
16.5 Testing of the applied coatings . 53
17 Elastomeric coatings . 54
17.1 Coating identification . 54
17.2 Description of the coatings. 55
17.3 Surface preparation . 55
17.4 Application of the coatings. 55
17.5 Testing of the applied coatings . 56
Annex A (normative) Inspection of thickness . 60
Annex B (normative) Holiday detection test. 61
Annex C (normative) Adhesion test — Resistance to removal . 62
Annex D (normative) Peel-strength test. 64
Annex E (normative) Thermal analysis of epoxy powder and cured coating film (FBE) . 68
Annex F (normative) Cathodic disbondment test . 72
Annex G (normative) Impact test . 78
Annex H (normative) Indentation test. 80
Annex I (normative) Hot-water immersion test. 82
Annex J (normative) Drip resistance of petrolatum and wax tapes. 84
Annex K (normative) Specific electrical insulation resistance. 85
Annex L (normative) Lap shear strength . 87
Annex M (normative) Peel strength between layers . 89
Annex N (normative) Thermal ageing resistance. 92
Annex O (normative) Test programmes for procedure for qualification trials, pre-production trials
or production testing . 96
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ISO 21809-3:2008(E)
Bibliography . 99

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ISO 21809-3:2008(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards 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 organizations, 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 the 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 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 21809-3 was prepared by Technical Committee ISO/TC 67, Materials, 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 pipelines used in pipeline transportation systems:
⎯ Part 1: Polyolefin coatings (3-layer PE and 3-layer PP)
⎯ Part 2: Fusion-bonded epoxy coatings
⎯ Part 3: Field joint coatings
⎯ Part 4: Polyethylene coatings (2-layer PE)
⎯ Part 5: External concrete coatings
A Part 6, dealing with bitumen, asphalt and coaltar coatings, a Part 7, dealing with liquid coatings, a Part 8,
dealing with thermal insulation coatings, and a Part 9, dealing with epoxy polyamide powder coatings (2-layer)
are under preparation.
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ISO 21809-3:2008(E)
Introduction
Users of this part of ISO 21809 should 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 solutions for the individual application. This
can be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, the vendor should identify any variations from this part of ISO 21809 and provide details.

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INTERNATIONAL STANDARD ISO 21809-3:2008(E)

Petroleum and natural gas industries — External coatings for
buried or submerged pipelines used in pipeline transportation
systems —
Part 3:
Field joint coatings
1 Scope
This part of ISO 21809 specifies requirements for field joint coating of seamless or welded steel pipes for
pipeline transportation systems in the petroleum and natural gas industries as defined in ISO 13623. This part
of ISO 21809 specifies the qualification, application and testing of the corrosion protection coatings applied to
steel surfaces left bare after the pipes and fittings (components) are joined by welding.
This part of ISO 21809 does not address additional mechanical protection, thermal insulation or joint infills for
concrete weight-coated pipes.
This part of ISO 21809 defines and codifies the different types of field joint coatings for buried or submerged
pipelines as presented in Table 1.
NOTE Pipes coated in accordance with this part of ISO 21809 are considered suitable for further 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 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 34-1, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 1: Trouser, angle and
crescent test pieces
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 62, Plastics — Determination of water absorption
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
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 indentation hardness by means of a durometer (Shore
hardness)
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ISO 21809-3:2008(E)
ISO 1431-1:2004, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1523, Determination of flash point — Closed cup equilibrium method
ISO 1817, Rubber, vulcanized — Determination of the effect of liquids
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic
method
ISO 2781:2008, Rubber, vulcanized or thermoplastic — Determination of density
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2811-1, Paints and varnishes — Determination of density — Part 1: Pyknometer method
ISO 3251, Paints, varnishes and plastics — Determination of non-volatile-matter content
ISO 3417, Rubber — Measurement of vulcanization characteristics with the oscillating disc curemeter
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 thickness)
ISO 4593, Plastics — Film and sheeting — Determination of thickness by mechanical scanning
ISO 4624, Paint and varnishes — Pull-off test for adhesion
ISO 4625-1, Binders for paints and varnishes — Determination of softening point — Part 1: Ring-and-ball
method
ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of
traverse) — Specification
ISO 7619 (all parts), Rubber, vulcanized or thermoplastic — Determination of indentation hardness
ISO 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 substrates 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 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 products — Tests for the
assessment of surface cleanliness — Part 9: Field method for conductometric determination of water-soluble
salts
ISO 8503-1, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 1: Specifications and definitions for ISO
surface profile comparators for the assessment of abrasive blast-cleaned surfaces
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ISO 21809-3:2008(E)
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 abrasive blast-cleaned steel — Comparator procedure
ISO 8503-4, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — 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 steel substrates — Part 5: Replica tape method for the
determination of the surface profile
ISO 8504-3, Preparation of steel substrates before application of paints and related products — Surface
preparation methods — Part 3: Hand- and power-tool cleaning
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 abrasives
ISO 11126 (all parts), Preparation of steel substrates before application of paints and related products —
Specifications for non-metallic blast-cleaning abrasives
ISO 11357-2, Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition
temperature
ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)
ISO 13623:—, Petroleum and natural gas industries — Pipeline transportation systems
ISO 21809-2, Petroleum and natural gas industries — External coatings for buried and submerged pipelines
used in pipeline transportation systems — Part 2: Fusion-bonded epoxy coatings
1)
ASTM D 70 , Standard Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method)
ASTM D 92, Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester
ASTM D 127, Standard Test Method for Drop Melting Point of Petroleum Wax, Including Petrolatum
ASTM D 149, Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid
Electrical Insulating Materials at Commercial Power Frequencies
ASTM D 257, Standard Test Methods for DC Resistance or Conductance of Insulating Materials
ASTM D 695, Standard Test Method for Compressive Properties of Rigid Plastics
ASTM D 937, Standard Test Method for Cone Penetration of Petrolatum
ASTM D 938, Standard Test Method for Congealing Point of Petroleum Waxes, Including Petrolatum
ASTM D 1000, Standard Test Method for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and
Electronic Applications
ASTM D 1141, Standard Practice for the Preparation of Substitute Ocean Water
ASTM D 1321, Standard Test Method for Needle Penetration of Petroleum Waxes

1) American Society for Testing and Materials, 100 Harbour Drive, West Conshohocken, PA 19428-2959, USA.
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ISO 21809-3:2008(E)
ASTM D 2084, Standard Test Method for Rubber Property — Vulcanization Using Oscillating Disk Cure Meter
ASTM D 4285, Standard Test Method for Indicating Oil or Water in Compressed Air
ASTM D 4541, Standard Test Method for Pull-off Strength of Coatings Using Portable Adhesion Testers
2)
SSPC-SP1 , Surface preparation specification No.1 — Solvent cleaning
SSPC CS 23.00, Specification for the Application of Thermal Spray Coatings (Metallizing) of Aluminum, Zinc
and Their Alloys and Composites for the Corrosion Protection of Steel
3)
AWS C2.25/C2.25M , Specification for Thermal Spray Feedstock Solid and Composite Wire and Ceramic
Rods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
application procedure specification
APS
document describing procedures, methods, equipment and tools used for coating application
3.2
applicator
company that undertakes the coating application in accordance with the provisions of this part of ISO 21809
3.3
batch
quantity of material produced in a continuous manufacturing operation using raw materials of the same source
and grade
3.4
batch certificate
certificate of analysis issued by the manufacturer
3.5
bonding agent
material applied as a film to the primed metal surface in order to ensure adhesion of the subsequent protective
coating
3.6
certificate of compliance
one of the types of inspection documents defined by ISO 10474, issued in accordance with the purchasing
requirements
3.7
coating operative
individual undertaking coating activity on the work site, including surface preparation
3.8
cutback
length of pipe left uncoated at each end for joining purposes (e.g. welding)

th th
2) The Society for Protective Coatings, 40 24 Street, 6 Floor, Pittsburgh, PA 15222-4656, USA.
3) America Welding Soc
...