SIST EN ISO 21809-2:2015

SLOVENSKI STANDARD
01-februar-2015
1DGRPHãþD
SIST EN ISO 21809-2:2008
SIST EN ISO 21809-2:2008/AC:2009
Naftna industrija in industrija zemeljskega plina - Zunanje prevleke za cevovode,
zakopane v zemljo ali potopljene v vodo, v sistemih cevovodnega transporta - 2.
del: Enoplastne epoksidne prevleke, nataljene na podlago (ISO 21809-2:2014)
Petroleum and natural gas industries - External coatings for buried or submerged
pipelines used in pipeline transportation systems - Part 2: Single layer fusion-bonded
epoxy coatings (ISO 21809-2:2014)
Erdöl und Erdgasindustrie - Umhüllungen für erd- und wasserverlegte Rohrleitungen in
Transportsystemen - Teil 2: Einschicht-Epoxipulverbeschichtungen (ISO 21809-2:2014)
Industries du pétrole et du gaz naturel - Revêtements externes des conduites enterrées
ou immergées utilisées dans les systèmes de transport par conduites - Partie 2:
Revêtements à base de résine simple époxydique appliquée par fusion (ISO 21809-
2:2014)
Ta slovenski standard je istoveten z: EN ISO 21809-2:2014
ICS:
25.220.99 Druge obdelave in prevleke Other treatments and
coatings
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 21809-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2014
ICS 75.200 Supersedes EN ISO 21809-2:2007
English Version
Petroleum and natural gas industries - External coatings for
buried or submerged pipelines used in pipeline transportation
systems - Part 2: Single layer fusion-bonded epoxy coatings
(ISO 21809-2:2014)
Industries du pétrole et du gaz naturel - Revêtements Erdöl und Erdgasindustrie - Umhüllungen für erd- und
externes des conduites enterrées et immergées utilisées wasserverlegte Rohrleitungen in Transportsystemen - Teil
dans les systèmes de transport par conduites - Partie 2: 2: Einschicht-Epoxipulverbeschichtungen (ISO 21809-
Revêtements monocouche à base de résine époxydique 2:2014)
appliquée par fusion (ISO 21809-2:2014)
This European Standard was approved by CEN on 22 May 2014.

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 be obtained on application to the CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21809-2:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 21809-2:2014) has been prepared by Technical Committee ISO/TC 67 “Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries” in collaboration
with Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” the secretariat of which is
held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by May 2015, and conflicting national standards shall be withdrawn at the
latest by May 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 21809-2:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 21809-2:2014 has been approved by CEN as EN ISO 21809-2:2014 without any modification.

INTERNATIONAL ISO
STANDARD 21809-2
Second edition
2014-11-01
Petroleum and natural gas
industries — External coatings for
buried or submerged pipelines used
in pipeline transportation systems —
Part 2:
Single layer fusion-bonded epoxy
coatings
Industries du pétrole et du gaz naturel — Revêtements externes
des conduites enterrées et immergées utilisées dans les systèmes de
transport par conduites —
Partie 2: Revêtements monocouche à base de résine époxydique
appliquée par fusion
Reference number
ISO 21809-2:2014(E)
©
ISO 2014
ISO 21809-2:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 4
4.1 Symbols . 4
4.2 Abbreviated terms . 4
5 General requirements . 4
5.1 Rounding . 4
5.2 Compliance to standard . 5
6 Information supplied by the purchaser . 5
6.1 General information . 5
6.2 Additional information . 5
7 Coating materials . 6
7.1 Epoxy powder . 6
7.2 Repair materials . 7
8 Coating qualification . 8
8.1 Qualification by manufacturer. 8
8.2 Qualification by applicator .10
9 Application of coating .12
9.1 General .12
9.2 Surface preparation .13
9.3 Coating application and curing temperature .14
9.4 Coating thickness .14
9.5 Cutback .15
10 Inspection and testing .15
10.1 General .15
10.2 Testing of incoming epoxy powder.15
10.3 In-process and finished product testing requirements .15
10.4 Test results.17
11 Repair of coated pipe .17
11.1 General .17
11.2 Repair of holidays .17
11.3 Stripping and recoating .17
12 Markings .18
12.1 General .18
12.2 Required markings .18
13 Handling and storage in the coating area .18
13.1 Handling.18
13.2 Storage .18
14 Test reports and inspection documents .19
Annex A (normative) Test methods .20
Annex B (normative) Procedure qualification trial (PQT), inspection and testing plan (ITP)
and daily log .47
Bibliography .50
ISO 21809-2:2014(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures for
petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transportation systems.
This second edition cancels and replaces the first edition (ISO 21809-2:2007), which has been technically
revised. It also includes the Technical corrigendum ISO 21809-2:2007/Cor.1:2008.
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: Single layer fusion-bonded epoxy coatings
— Part 3: Field joint coatings
— Part 4: Polyethylene coatings (2-layer PE)
— Part 5: External concrete coatings
The following parts are under preparation:
— Part 6: Multilayer fusion-bonded epoxy coatings (FBE)
iv © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
Introduction
Users of this part of ISO 21809 should be aware that further or differing requirements might 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 if there is innovative or developing technology. If an alternative is
offered, the vendor should identify any variations from this part of ISO 21809 and provide details.
INTERNATIONAL STANDARD ISO 21809-2:2014(E)
Petroleum and natural gas industries — External coatings
for buried or submerged pipelines used in pipeline
transportation systems —
Part 2:
Single layer fusion-bonded epoxy coatings
1 Scope
This part of ISO 21809 specifies the requirements for qualification, application, testing and handling of
materials for plant application of single layer fusion-bonded epoxy (FBE) coatings 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 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 documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2815, Paints and varnishes — Buchholz indentation test
ISO 8130-2, Coating powders — Part 2: Determination of density by gas comparison pyknometer
(referee method)
ISO 8130-3, Coating powders — Part 3: Determination of density by liquid displacement pyknometer
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, 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 the conductometric determination of water-
soluble salts
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, 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 10474:2013, Steel and steel products — Inspection documents
ISO 21809-2:2014(E)
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 11127-6, Preparation of steel substrates before application of paints and related products — Test
methods for non-metallic blast-cleaning abrasives — Part 6: Determination of water-soluble contaminants
by conductivity measurement
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems
ISO 80000-1:2009, Quantities and units — Part 1: General
1)
EN 10204:2004, Metallic products — Types of inspection documents
2)
AS 3894.6, Site testing of protective coatings — Determination of residual contaminants
3)
ASTM D4060, Standard Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser
ASTM D4940, Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of
Blasting Abrasives
4)
SSPC-AB 1, Mineral and Slag Abrasives
SSPC-AB 2, Cleanliness of Recycled Ferrous Metallic Abrasives
SSPC-AB 3, Ferrous Metallic Abrasive
SSPC-SP 1, Solvent cleaning
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 this part of ISO 21809
3.3
batch
quantity of epoxy powder produced using the same formulation and raw materials of the same source
during a continuous production run of not more than 8 h
3.4
batch certificate
certificate of analysis issued by the manufacturer
1) European Committee for Standardization, Management Centre, Avenue Marnix 17, B-1000, Brussels, Belgium.
2) Standards Australia, GPO Box 476, Sydney, NSW 2001, Australia.
3) American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, USA.
4) SSPC: The Society for Protective Coatings, 40 24th Street, 6th Floor, Pittsburg. PA 15222-4656, USA.
2 © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
3.5
cutback
length of pipe left uncoated at each end for joining purposes
3.6
glass transition
reversible change in an amorphous polymer or in amorphous regions of a partially crystalline polymer
from (or to) a viscous or rubbery condition to (or from) a hard and relatively brittle one
[SOURCE: ISO 11357-2:2013, 3.1]
3.7
glass transition temperature
T
g
characteristic value of the temperature range over which the glass transition takes place
Note 1 to entry: Note to entry: The assigned glass transition temperature, T , can vary, depending on the specific
g
property and on the method and conditions selected to measure it.
[SOURCE: ISO 11357-2:2013, 3.2]
3.8
holiday
coating discontinuity that exhibits electrical conductivity when exposed to a specific voltage
3.9
laboratory-coated test specimen
specimen taken from a laboratory-prepared panel
3.10
manufacturer
company responsible for the manufacture of coating material(s)
3.11
manufacturer’s specification
document that specifies the characteristics, test requirements and application recommendations for the
coating materials
3.12
powder shipment
amount of powder transported in one container
3.13
procedure qualification trial
PQT
application of a coating and subsequent inspection/testing of its properties, to confirm that the APS is
adequate to produce a coating with the specified properties, carried out prior to the start of production
3.14
purchaser
company responsible for providing the product order requirements
3.15
test report
document that provides the quantitative test results for tests conducted in accordance with the
requirements of this part of ISO 21809
3.16
test ring
sample taken from production-coated pipe
ISO 21809-2:2014(E)
4 Symbols and abbreviated terms
4.1 Symbols
C percentage conversion of FBE coating, expressed as a percentage
d thickness, expressed in millimetres
ΔH exothermic heat of reaction, expressed in joule per grams
M mass, expressed in grams
R mandrel radius, expressed in millimetres
T glass transition temperature, expressed in degrees Celsius
g
ΔT variation of the glass transition temperature, expressed in degrees Celsius
g
w mass fraction of the epoxy power retained on a sieve, expressed as a percentage of total
ep
sample
w mass fraction of moisture, expressed as a percentage
m
4.2 Abbreviated terms
d.c. direct current
DSC differential scanning calorimetry
FBE fusion-bonded epoxy
HRC Rockwell C scale hardness
ID inner diameter
ITP inspection and testing plan
NPS nominal pipe size
OD outer diameter
ppd per pipe diameter
5 General requirements
5.1 Rounding
Unless otherwise stated in this part of ISO 21809, to determine conformance with the specified 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 80000-1:2009, Annex B, Rule A.
NOTE For the purposes of this provision, the rounding method of ASTM E29 is equivalent to ISO 80000-1:2009,
Annex B, Rule A.
4 © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
5.2 Compliance to standard
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 systems 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 order to be
ensured 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) reference to this part of ISO 21809 and year of publication, i.e. ISO 21809-2:2014;
b) pipe quantity, outside diameter, minimum wall thickness, minimum, maximum and nominal
length, steel grade;
c) bare pipe standard or specification designation, e.g. ISO 3183;
d) minimum thickness and maximum permissible thickness of the coating;
e) cutback and tolerances for both ends of pipe;
f) minimum and maximum pipeline design temperatures (°C);
g) type of certificate of compliance;
h) pipe line installation methods for offshore (e.g. reel lay, S-lay, J-lay).
6.2 Additional information
The purchase order shall specify which of the following provisions apply for the specific order item:
a) additional surface treatments;
b) plant and process inspection by the purchaser;
c) increased test ring length;
d) test ring location;
e) test frequency for additional test rings;
f) additional markings;
g) handling procedures;
h) storage procedures;
i) waiver of test reports;
j) maximum allowable preheating temperature;
k) applicator qualification requirements;
l) other special requirements;
ISO 21809-2:2014(E)
m) pipe tracking and traceability of pipes to coating materials;
n) permissible number coating repairs if different from Clause 11;
o) documentation and schedule for supply of documents;
p) purchaser approval of APS;
q) inspection and testing plan and/or daily log;
r) inspection of incoming pipe;
s) pipe end protection;
t) surface pretreatments if any;
u) PQT requirements;
v) protection against adverse weather conditions during storage.
7 Coating materials
7.1 Epoxy powder
7.1.1 General
The applicator shall use epoxy powder that is
a) certified by the manufacturer to be in accordance with the requirements of 7.1.2 and 8.1, and
compatible with the requirements of 9.2, 9.3 and 9.4,
b) identified by the manufacturer on each package with the following:
— manufacturer’s name;
— product number/description;
— product temperature range (maximum and minimum);
— mass of material;
— batch number/manufacturing identification number;
— location of manufacture;
— temperature requirements for transportation and storage;
— year, month and day of manufacture;
— expiry date, and
c) handled, transported, and stored in accordance with the manufacturer’s recommendations.
7.1.2 Properties
As a minimum, each batch of epoxy powder shall be tested by the manufacturer in accordance with
the requirements of Table 1. Test results shall be reported in accordance with ISO 10474 and a batch
certificate with the test results shall be provided by the manufacturer to the applicator.
6 © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
Table 1 — Minimum requirements for epoxy powder
Property Unit Test method Requirements
Cure time s Clause A.2 Within the manufacturer’s specification
Gel time s Clause A.3 Within the manufacturer’s specification
Total volatile/moisture ≤ 0,6 %
% Clause A.5
content mass fraction
Maximum retained on 150 µm and 250 µm
Particle size % Clause A.6
sieves within the manufacturer’s specification
Density g/cm Clause A.7 Within the manufacturer’s specification
T (°C) Within the manufacturer’s specification
g1
Thermal characteristics T (°C) Clause A.8
g2
ΔH (J/g)
7.1.3 Packaging
The powder shall be contained in packaging that is labelled to identify the items specified in 7.1.1 b).
7.2 Repair materials
The applicator shall use repair materials that are certified by the powder manufacturer to be compatible
with the epoxy powder.
Repair material batches shall be identified by the product manufacturer with the following:
— manufacturer’s name;
— product number/description;
— product temperature range (maximum and minimum);
— mass of material;
— batch number/manufacturing identification number;
— location of manufacture;
— temperature requirements for transportation and storage;
— year, month and day of manufacture;
— expiry date.
Repair materials shall be handled, transported, and stored in accordance with the material manufacturer’s
recommendations.
ISO 21809-2:2014(E)
8 Coating qualification
8.1 Qualification by manufacturer
8.1.1 Epoxy powder
8.1.1.1 General
The manufacturer shall qualify the epoxy powder in accordance with this part of ISO 21809. The
qualification shall be repeated in case of changes in the material composition, changes in the production
process which influence the material processing behaviour and change in production facility.
The manufacturer shall carry out the tests in accordance with the requirements of 8.1.1. Coatings designed
for up to 95°C shall be qualified by the manufacturer through laboratory coated test specimens or plant
applied coating for each of the applicable tests. The test results shall meet the acceptance criteria in Table 2.
For coatings designed for services above 95°C, in addition to the requirements in Table 2, the tests for
flexibility, impact resistance, cathodic disbondment, hot water adhesion, tabor abrasion and thermal
characteristics shall be repeated using samples that have been conditioned in an oven at a temperature
of 5°C below T , for a minimum of 30 d followed by ambient temperature for 24 h before testing. Cathodic
g
disbondment testing shall be performed using the method in Clause A.10. Acceptance criteria for these
tests shall be agreed between the manufacturer and the purchaser. Other temperature exposure
conditions may be agreed based on the pipeline service conditions.
Laboratory test specimens shall be prepared in accordance with 8.1.1.2.
These test results shall be reported in accordance with ISO 10474 and shall be available to the applicator
upon request.
8 © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
Table 2 — Requirements for coating qualification
Properties Acceptance criteria Number of test spec- Test method
imens
Meets the manufactur-
Thermal characteristics 1 Clause A.8
er’s specification
Cathodic disbondment: ≤5 mm disbondment
3 Clause A.9
24 h, 65 °C ± 3 °C, −3,5 V
24 h hot-water adhesion 75 °C ± 3 °C Rating of 1 to 2 3 Clause A.16
28 d hot-water adhesion 75 °C ± 3 °C Rating of 1 to 3 3 Clause A.16
Cathodic disbondment: ≤8 mm disbondment
3 Clause A.9
28 d, 20 °C ± 3 °C, −1,5 V
Cathodic disbondment: ≤18 mm disbondment
3 Clause A.9
28 d, 65 °C ± 3 °C, −1,5 V
Cathodic disbondment: ≤18 mm disbondment
3 Clause A.9
28 d, max design temperature (if above
65 °C) ± 3 °C, −1,5 V
Pass (compared with
Cross-section porosity 1 Clause A.12
Figure A.11)
Pass (compared with
Interface porosity 1 Clause A.12
Figure A.12)
Flexibility at 0 °C for coating thickness of No cracking at 2,5° ppd
5 Clause A.13
350 µm to 500 µm
Flexibility at −30 °C for coating thickness No cracking at 2° ppd
3 Clause A.13
of 350 µm to 500 µm
Flexibility at minimum design temperature No cracking at 2° ppd
3 Clause A.13
for coating thickness of 350 µm to 500 µm
Impact at minimum design temperature ≥2 J 3 Clause A.14
Strained coating, No cracking
cathodic disbondment
3 Clause A.15
28 d, 20 °C ± 3 °C, −1,5 V
Hardness test at maximum design temper- Buchholz value min 80
3 ISO 2815
ature
100 mg ASTM D4060
ASTM CS-17
Taber abrasion 3 wheel, 1 000
cycles,
1kg mass
8.1.1.2 Preparation of the laboratory coated test specimens
Test specimens shall be mild steel and shall have dimensions in accordance with the applicable test method
(see Annex A). The substrate shall be abrasively blast cleaned with steel grit, in accordance with ISO 11124-3,
to provide a cleanliness in accordance with the requirements of ISO 8501-1:2007, grade Sa 2 1/2.
The surface shall have a peak-to-trough height of between 50 µm and 100 µm as measured in accordance
with ISO 8503-4 (Stylus method), or ISO 8503-5 (Replica tape method).
Coating shall be applied in accordance with the product (data sheet) application guidelines.
The thickness of the coating on the completed test specimen shall be 350 µm to 500 µm. This should be
measured by a calibrated coating thickness gauge verified to ± 5 % of full scale range.
ISO 21809-2:2014(E)
8.1.2 Repair material
Qualification requirements for the repair material shall be agreed between repair material manufacturer
and purchaser.
8.2 Qualification by applicator
8.2.1 General
The production coating shall be qualified by the applicator for each coating line, unless purchaser waives
this requirement as indicated in 6.2. Applicator shall use coating materials qualified in accordance with
the requirements of 8.1 and prepare coated samples in accordance with a documented APS.
Qualification shall be achieved by successful evaluation of pipe coated samples using the specified coating
line and the coating qualification test results shall be reported in accordance with the requirements of this
part of ISO 21809. The minimum requirements for plant qualification and production are given in 8.2.2.
The qualification shall be carried out in accordance with APS (see 8.2.3) and repeated in case of essential
modifications of the coating line, coating materials and coating procedures.
8.2.2 Minimum requirements for plant qualification and production
The requirements for testing pipe surface preparation are given in Table 3. Requirements of plant
applied coating (quality tests) are given in Table 4.
Table 3 — Requirements for inspection of surface preparation-production and plant
qualification
Properties Unit Test method Requirements Frequency quali- Frequency pro-
fication duction
Incoming FBE - see 10.2 see 10.2 each batch each shipment
powder
Surface condition - visual inspection free of contamina- each pipe each pipe
before blasting tions
Environmental - calculation as determined at once every 4 h
conditions time of measure-
ment
Pipe temperature °C thermocouple minimum 3 °C once every 4 h
before blasting above the dew
point
Size, shape and - visual and certification conformity to once 1/day
properties of ISO 11124 (all parts) certificate,
abrasive (metallic)
compliance to
ISO 11126 (all parts)
manufacturing/
(non metallic)
working proce-
dures
Water soluble µS/cm ASTM D4940 conductivity max. once 1/shift
contamination of 60
abrasives
Soluble salt after mg/m Potassium ferricyanide salt content (as each pipe every 4 h
blasting indicator in accordance NaCl) max. 20
every 4 h if salt
with AS 3894.6 and fol-
presence is indi-
lowing conductive meas-
cated
urement, ISO 8502-9 and
ISO 11127-6
Surface roughness µm ISO 8503-4 50 to 100 5 pipes every 1 h
of blasted surface
or
(R R )
z/ y5
ISO 8503-5
10 © ISO 2014 – All rights reserved

ISO 21809-2:2014(E)
Table 3 (continued)
Properties Unit Test method Requirements Frequency quali- Frequency pro-
fication duction
Visual inspection - ISO 8501-1 grade Sa 2 1/2 each pipe each pipe
of blasted surface
Presence of dust - ISO 8502-3 max. class 2 5 pipes every 1 h
after dust removal
(for both size and
quantity)
Visual inspection - visual no rust each pipe each pipe
of pipe prior to
introduction to
coating line
Preheating tem- °C pyrometer compliance to APS each pipe each pipe
perature before
coating
Table 4 — Requirements for plant applied coating: production and plant qualification
Properties Acceptance Criteria Test Method Frequency for quali- Frequency for pro-
fication duction
Degree of cure DSC - ΔT meets manufacturers Clause A.8 first pipe first pipe of the order
g
specification and then 1/shift
Porosity less than or equal to Clause A.12 first pipe first pipe of the order
that illustrated in Fig- and then 1/shift
ures A.11 and A.12
Dry adhesion rating of 1 to 2 Clause A.4 5 pipes every 4 h
Impact ≥2 J Clause A.14 3 1/shift
Flexibility at minimum no cracking at 2° ppd Clause A.13 3 1/shift
design temperature for
coating thickness of
350 µm to500 µm
Hot-water adhesion; 24 rating of 1 to 2 Clause A.16 1 1/shift
h, 75°C ± 3°C
Hot-water adhesion; 28 rating of 1 to 3 Clause A.16 1 In accordance with
d, 75°C ± 3°C APS
Cathodic disbondment: ≤5 mm disbondment Clause A.9 1 1/shift
24 h, 65°C ± 3°C – 3,5 V
Interface contamination 30 % maximum Clause A.11 1 1/shift
Cathodic disbondment: ≤18 mm disbondment Clause A.10 1 In accordance with
28 d, at max. design APS
temperature per APS (if
design temperature is
above 65°C) ± 3°C – 1,4 V
(Ag/AgCl reference
electrode)
Cathodic disbondment, ≤ 8 mm disbondment Clause A.9 1 In accordance with
28 d 65°C ± 3°C – 1,5 V APS
Coating thickness 350 µm to 500 µm - In accordance with In accordance with
APS APS
Cut back - - In accordance with In accordance with
APS APS
Continuity no holidays Subclause 10.3.2.2 each pipe each pipe
ISO 21809-2:2014(E)
8.2.3 Application procedure specification (APS)
Prior to the start of coating production and any specified PQT, the applicator shall prepare an APS, including:
— incoming inspection of the pipe and pipe tracking;
— data sheets for coating materials, including any materials to be used for coating repairs;
— data sheets for abrasive blast materials;
— certification, receipt, handling and storage of materials for coating and abrasive blasting;
— procedure for cleaning of all application equipment;
— preparation of steel surface including monitoring of environmental parameters, methods and tools
for inspection, grinding of pipe surface defects and testing of surface preparation;
— coating application, including tools/equipment for control of process parameters essential for
quality of the coating;
— lay-out sketch or flow diagram for the coating plant;
— methods and tools/equipment for inspection and testing of the applied coating;
— repairs of coating defects and any associated inspection and testing;
— stripping of defective coating;
— preparation of coating cutback areas;
— marking and traceability;
— handling and storage of pipe;
— any special condition for despatch of coated pipes, including protection of pipe ends;
— documentation.
The APS (see Annex B) shall cover all items associated with quality control as defined in this part of
ISO 21809 and any agreed amendments. It shall be available to the purchaser on request at any time
during production.
If specified, the APS (see Annex B) including any revisions shall be approved by the purchaser prior to
the start of production and any specified PQT.
The applicator shall prepare an ITP and a daily log to record quality control data in accordance with B.3
or agree
...