EN ISO 18797-1:2017

SLOVENSKI STANDARD
01-november-2017
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Petroleum, petrochemical and natural gas industries - External corrosion protection of
risers by coatings and linings - Part 1: Elastomeric coating systems-polychloroprene or
EPDM (ISO 18797-1:2016)
Erdöl-, petrochemische und Erdgasindustrie - Äußerer Korrosionsschutz von
Steilgeitungen durch Beschichtungen und Auskleidungen - Teil 1: Elastomerisches
Beschichtungssystem - Polychloropren oder EPDM (ISO 18797-1:2016)
Industries du pétrole, de la pétrochimie et du gaz naturel - Protection de la corrosion
externe des risers par revêtements et doublures - Partie 1: Systèmes de revêtement
élastomère-polychloroprène ou EPDM (ISO 18797-1:2016)
Ta slovenski standard je istoveten z: EN ISO 18797-1:2017
ICS:
25.220.01 Površinska obdelava in Surface treatment and
prevleke na splošno coating in general
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 18797-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 75.180.10
English Version
Petroleum, petrochemical and natural gas industries -
External corrosion protection of risers by coatings and
linings - Part 1: Elastomeric coating systems-
polychloroprene or EPDM (ISO 18797-1:2016)
Industries du pétrole, de la pétrochimie et du gaz Erdöl-, petrochemische und Erdgasindustrie - Äußerer
naturel - Protection de la corrosion externe des risers Korrosionsschutz von Steilgeitungen durch
par revêtements et doublures - Partie 1: Systèmes de Beschichtungen und Auskleidungen - Teil 1:
revêtement élastomère-polychloroprène ou EPDM (ISO Elastomerisches Beschichtungssystem -
18797-1:2016) Polychloropren oder EPDM (ISO 18797-1:2016)
This European Standard was approved by CEN on 23 August 2017.

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, Serbia, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18797-1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 18797-1:2016 has been prepared by Technical Committee ISO/TC 67 “Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 18797-1:2017
by Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum,
petrochemical and natural gas industries” the secretariat of which is held by NEN.
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 March 2018, and conflicting national standards shall
be withdrawn at the latest by March 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 18797-1:2016 has been approved by CEN as EN ISO 18797-1:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 18797-1
First edition
2016-09-01
Petroleum, petrochemical and natural
gas industries — External corrosion
protection of risers by coatings and
linings —
Part 1:
Elastomeric coating systems-
polychloroprene or EPDM
Industries du pétrole, de la pétrochimie et du gaz naturel —
Protection de la corrosion externe des risers par revêtements et
doublures —
Partie 1: Systèmes de revêtement élastomère-polychloroprène ou EPDM
Reference number
ISO 18797-1:2016(E)
©
ISO 2016
ISO 18797-1:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved

ISO 18797-1:2016(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Abbreviated terms . 5
5 Pre-work requirements . 6
5.1 General . 6
5.2 Health, safety and environmental (HSE) . 6
5.3 Qualification of coating/lining application and inspection personnel . 6
6 Materials . 7
6.1 General requirements . 7
6.2 Material requirements. 8
6.3 Materials packing, handling and storage . 9
6.4 Coating materials . 9
7 Bare pipes transportation, handling and storage .10
7.1 Transportation and handling of pipes .10
7.2 Storage of pipes .10
8 Surface preparation .10
8.1 General .10
8.2 Pipe imperfections/damages removal .11
8.3 Contaminants removal .11
8.4 Abrasive blast cleaning .11
9 Coating application for risers .13
9.1 General .13
9.2 Priming and coating on abrasive blast-cleaned surface .13
9.3 Polychloroprene or EPDM application and vulcanization .14
9.4 Manual coating application on clamps, guides, bolt holes, inner sections of flanges
and pipe section used for modifications at worksites .15
9.5 Coating application of field joints .16
9.6 Coating repair .16
10 Inspection and testing .17
10.1 General .17
10.2 Testing of elastomer properties .17
10.2.1 General.17
10.2.2 Cure and hardness .17
10.2.3 Specific gravity.17
10.2.4 Rheological properties . .17
10.2.5 Tensile strength, tear strength and elongation at break .17
10.2.6 Compression set .18
10.2.7 Abrasion resistance .18
10.2.8 Ozone resistance .18
10.2.9 Adhesion .18
10.2.10 Resistance to seawater .18
10.2.11 Thermal conductivity . .18
10.2.12 Vulcanization characteristics (rotorless curemeters) .18
10.2.13 Cathodic disbondment .19
10.2.14 Volume resistivity .19
10.3 Inspection/testing of coated pipes .19
10.3.1 Visual inspection .19
ISO 18797-1:2016(E)
10.3.2 Holiday detection .19
10.3.3 Thickness test .20
10.3.4 Adhesion (bond) test . .20
10.3.5 Hardness testing .20
10.3.6 Ultrasonic inspection .20
10.3.7 Sound testing .20
10.3.8 Rejection .20
10.4 Inspection and testing of field joint coating .21
10.5 Test reports and certificate of compliance .21
11 Coating damage/defect repair .21
11.1 Defect acceptance criteria .21
11.2 Repair procedures .21
12 Handling and stacking of coated pipes .22
13 Quality requirements .22
14 Documentation .23
Annex A (informative) Contents in a batch certificate .24
Annex B (normative) Physical properties of polychloroprene or EPDM elastomer .25
Annex C (normative) Riser pipe external coating progress chart .26
Bibliography .28
iv © ISO 2016 – All rights reserved

ISO 18797-1:2016(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 (see 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 (see 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 World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries.
A list of all parts in the ISO 18797 series can be found on the ISO website.
ISO 18797-1:2016(E)
Introduction
This document is based on GSO 2273. This document defines the minimum technical requirements
for the external corrosion protection of risers by coatings and linings based on elastomeric coating
systems-polychloroprene, EPDM or equivalent elastomeric coatings that are employed in the oil and
gas industry and provides technical guidance for developing local standards and specifications in
order to ensure compliance in coating and lining material selection and performance with contract
requirements.
Users of this document need to be aware that further or differing requirements can be needed for
individual applications. This document is not limiting the contractor and/or manufacturer from
proposing or company from accepting alternative engineering solutions for the individual application.
This can be particularly applicable where there is innovative or developing technology. Where an
alternative is proposed, the specification issuer needs to identify any deviations from this document
and provide details.
This document does not incorporate any form of passive fireproofing requirements or any related
compatibility issues. Any requirements with regards to passive fireproofing are to be addressed
separately.
vi © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 18797-1:2016(E)
Petroleum, petrochemical and natural gas industries —
External corrosion protection of risers by coatings and
linings —
Part 1:
Elastomeric coating systems-polychloroprene or EPDM
1 Scope
This document specifies the minimum requirements for materials selection, surface preparation,
application, inspection, testing, qualification and acceptance criteria of external coating for steel risers
pipes used in the splash zone, their field joints and clamps/guides, using an elastomeric protective
coating based on polychloroprene, EPDM or equivalent. This is applicable for new construction and
repair of applied pipes before installation. Maintenance requirements and field repairs are covered in
ISO 18797-2.
This document also specifies the requirements for transportation, handling and storage of riser pipes
before and after surface preparation and coating application.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 34 (all parts), Rubber, vulcanized or thermoplastic — Determination of tear strength
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and
100 IRHD)
ISO 813, Rubber, vulcanized or thermoplastic — Determination of adhesion to rigid substrate — 90 degree
peel method [alternative to ISO 814]
ISO 814, Rubber, vulcanized or thermoplastic — Determination of adhesion to metal — Two-plate method
[alternative to ISO 813]
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient
or elevated temperatures
ISO 815-2, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low
temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 2781, Rubber, vulcanized or thermoplastic — Determination of density
ISO 2812-2, Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion method
ISO 18797-1:2016(E)
ISO 4649, Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating
cylindrical drum device
ISO 6502, Rubber — Guide to the use of curemeters
ISO 7619-1, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1:
Durometer method (Shore hardness)
1)
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 8502-2, Preparation of steel substrates before application of paints and related products — Tests for
the assessment of surface cleanliness — Part 2: Laboratory determination of chloride on cleaned surfaces
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 8502-4, Preparation of steel substrates before application of paints and related products — Tests for the
assessment of surface cleanliness — Part 4: Guidance on the estimation of the probability of condensation
prior to paint application
ISO 8502-5, Preparation of steel substrates before application of paints and related products — Tests for
the assessment of surface cleanliness — Part 5: Measurement of chloride on steel surfaces prepared for
painting (ion detection tube 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 substrate 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 8503-2, 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
[alternative to ISO 8503-5]
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 [alternative to ISO 8503-4]
ISO 10474:2013, Steel and steel products — Inspection documents
ISO 11126 (all parts), Preparation of steel substrates before application of paints and related products —
Specifications for non-metallic blast-cleaning abrasives
ISO 21457, Petroleum, petrochemical and natural gas industries — Materials selection and corrosion
control for oil and gas production systems
ISO 21809-3, Petroleum and natural gas industries — External coatings for buried or submerged pipelines
used in pipeline transportation systems — Part 3: Field joint coatings
1) SSPC SP10 is equivalent to ISO 8501-1.
2 © ISO 2016 – All rights reserved

ISO 18797-1:2016(E)
ISO 29601, Paints and varnishes — Corrosion protection by protective paint systems — Assessment of
porosity in a dry film [alternative to ASTM D5162]
EN 10204:2004, Metallic products — Types of inspection documents
EN 12664, Thermal performance of building materials and products — Determination of thermal resistance
by means of guarded hot plate and heat flow meter methods — Dry and moist products of medium and low
thermal resistance [alternative to ISO 29601]
EN 14879-4:2007, Organic coating systems and linings of protection of industrial apparatus and plants
against corrosion caused by aggressive media — Part 4: Linings on metallic components
API RP 5LW, Recommended Practice for Transportation of Line Pipe on Barges and Marine Vessels
[alternative to API RP 5L1]
API RP 5L1, Recommended Practice for Railroad Transportation of Line Pipe [alternative to API RP 5LW]
ASTM D2084, Standard Test Method for Rubber Property ― Vulcanization Using Oscillating Disc Cure Meter
ASTM D4285, Standard Test Method for Indicating Oil or Water in Compressed Air
ASTM D5162, Standard Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating
on Metallic Substrates [alternative to ISO 29601]
ASTM D5894, Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures
in a Fog/Dry Cabinet and a UV/Condensation Cabinet)
SSPC-AB 2, Cleanliness of Recycled Ferrous Metallic Abrasive
SSPC-PA 2, Procedure for Determining Conformance to Dry Coating Thickness Requirements
SSPC-SP 1, Solvent Cleaning
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
atmospheric zone
areas of offshore structures and riser pipes that extend upward from the splash zone (3.18) up to top
decks of the platform (3.12) which are exposed to sun, wind, sprays and rains
3.2
applicator
organization appointed by contractor (3.3)/client (3.4) to perform application of coatings/linings on
riser pipes as per project procedures prepared in accordance with this document
3.3
contractor
organization appointed by the client (3.4) to perform the works (3.21) in accordance with this document
3.4
client
organization for which professional services are rendered or person that receives a product
ISO 18797-1:2016(E)
3.5
dew point
temperature at which moisture in air will condense out on to a solid surface, like blast-cleaned metal
surface or newly coated surfaces
3.6
dust
loose fine particulate matter present on a steel surface prepared for rubber lining, arising from blast
cleaning or other grinding activities or from worksite environments
3.7
elastomeric coatings
flexible skins, permanently bonded to risers (3.15) and structures
Note 1 to entry: Elastomeric coatings are designed and developed to withstand aggressive environment or
conditions affecting platform structures and risers in marine splash zones. These provide add on durability to
designed life to structures and risers in offshore environment, while providing resistance to seawater ingression,
ozone oxidation, erosion and abrasion.
3.8
ethylene propylene diene monomer
EPDM
elastomeric compound or synthetic rubber applied as a protective coating on riser pipes in splash
zones (3.18) to withstand erosion of riser pipe material caused by continuous exposure to seawater
and wave actions
Note 1 to entry: EPDM provides resistance to outdoor and high temperature services in the range of -35 °C to 120 °C.
3.9
flash rusting
slight rust formation on a freshly blast-cleaned carbon steel surfaces due to humidity in air and if not
painted within 4 h from start of blasting
3.10
holiday
discontinuity in a protective coating (cracks, pinholes, voids, etc.) that exhibits electrical conductivity
when exposed to specific voltage
Note 1 to entry: Holiday also means a small defect in the lining that would permit corrosion of substrate
under service conditions for which lining is designed. The term can be considered synonymous with cracks or
mechanical damages occurring in rubber lining, while in services.
3.11
manufacturer
organization responsible for the manufacture of coating material(s)
3.12
platform
offshore structure used to accommodate oil and gas wells related production equipment, pipelines and
living quarters
3.13
production batch
one loading capacity of the internal mixer used for preparing the mixed rubber prior to forming strip
of sheet
3.14
polychloroprene
light yellow synthetic rubber compound obtained by polymerization of chloroprene
Note 1 to entry: Polychloroprene is commonly known as polychloroprene compound.
4 © ISO 2016 – All rights reserved

ISO 18797-1:2016(E)
Note 2 to entry: Polychloroprene is applied as a protective coating on riser pipes in splash zones (3.18) and below
to withstand erosion of riser pipe material caused by continuous exposure to seawater and wave actions. It
provides resistance to outdoor and services temperature in the range of −35 °C to 90 °C.
3.15
riser
section of pipeline carrying crude/gas between ocean floor and upper decks of platform (3.12) on
offshore structures
3.16
shore hardness
methods for determining the hardness of materials by means of durometer
3.17
site
lands and waters and other places on, under, in or through which the works (3.21) are to be carried
out and any other lands, waters or places provided by the client (3.4) for the purposes of the contract
together with any other places designated in the contract
3.18
splash zone
external surfaces of an offshore structure or pipeline that are, periodically wet and dry by the influence
of the astronomical tides, winds and waves, the limits are as defined by the contract specifications
3.19
surface profile
micro-roughness of surface generally expressed as an average of height of highest peaks relative to
lowest valleys sometime referred to as amplitude
3.20
vulcanization
curing of elastomeric materials by chemical reaction under heat and pressure to improve strength and
elasticity of applied rubber lining
3.21
works
activities to be executed in accordance with the contract, as defined in the specified conditions and
including both permanent and temporary activities
4 Abbreviated terms
µm micrometer (microns)
ASTM American Society for Testing and Materials
BS British Standard
DFT dry film thickness
HSE health, safety and environment
GSO Gulf Standardization Organization ITP
MS method statement
MSDS material safety data sheet
NACE National Association of Corrosion Engineers
NPS nominal pipe size
ISO 18797-1:2016(E)
pphm parts per hundred million
PPT pre-production trial
PQT procedure qualification trial
QA/QC quality assurance/quality control
SSPC Society for Protective Coatings
5 Pre-work requirements
5.1 General
5.1.1 All requirements in this document and the referenced documents shall be followed, except if they
are modified or supplemented by project specification or datasheet.
5.1.2 The equipment, materials, consumables, spaces and stockpile areas that are necessary to carry
out surface preparation, coating application, qualification testing, inspection and QA/QC shall be in
accordance with this document and in a manner satisfactory to the client.
5.1.3 Surface preparation, priming, coating application, qualification testing/inspection and QA/QC
works shall be carried out in a continuous sequence as per this document and as recommended by the
manufacturers, unless otherwise specified by the client.
5.2 Health, safety and environmental (HSE)
5.2.1 All necessary health, safety and environmental (HSE) procedures shall be employed to protect
the personnel and the surrounding environment during on-site/field works. The contractors shall
submit their HSE manual for client’s approval. The approved HSE procedures for the safe coating/lining
processes shall be strictly followed.
5.2.2 All relevant international safety requirements, client’s safety regulations for contractors and
lifting equipment regulations shall be adhered, while performing coating and lining works.
5.2.3 Materials safety data sheets (MSDS) for all chemicals to be used within the client’s operation
areas shall be submitted to the client for review and approval. Health and safety precautions shall be
clearly described on each materials container/package.
5.2.4 All wastes resulting from supply, preparation and application shall be contained, collected
and properly disposed of in accordance with international/local environmental protection
standards/regulations.
5.3 Qualification of coating/lining application and inspection personnel
5.3.1 The coating/lining operatives shall be competent to undertake the coating application,
inspection/testing procedures and repair work. The qualification shall be obtained as agreed with the
client or by demonstration at a procedure qualification trial (PQT) during pre-production trial (PPT).
5.3.2 Inspectors and applicator personnel carrying out the coating inspection shall be competent
to carry out the requirements of this document. The applicator shall request the manufacturer of the
coating/lining material(s) and equipment to provide technical assistance to the coating/lining operatives
if necessary.
6 © ISO 2016 – All rights reserved

ISO 18797-1:2016(E)
6 Materials
6.1 General requirements
6.1.1 The general requirements for the selection of materials for coating system and surface
preparation shall be in accordance with ISO 21457. Materials proposed for coating of the riser pipe
shall be tested by the product manufacturer and approved by the client before use. Non-conforming
materials shall be rejected and replaced with approved materials. Test certificates shall be provided for
all materials.
6.1.2 Identification of corrosion mechanism and parameter for evaluation when performing selection
of materials for pipelines, piping related to transport and processing of hydrocarbon production including
utility, injection system and wellheads shall be in accordance with ISO 21457.
NOTE ISO 21457 refers to materials that are generally available with properties that are known and
documented. It also allows other materials to be evaluated and qualified for use.
6.1.3 Materials shall be of high quality, uniform in composition and free from all inclusions and foreign
contaminants.
6.1.4 Materials shall not contain any asbestos/fibrous constituents, i.e. fibrous fillers or asbestos felt.
6.1.5 The contractor shall provide details of manufacturer, materials composition, technical
specification, physical properties, data sheets and test certificates for all materials, prior to use, for the
client’s review and approval. The client has the right to request a complete performance test for any
material used during the surface preparation and coating processes. The contractor and/or lining
applicator shall select polychloroprene or EPDM compound, which is suitable for company specified
characteristics and services and also select adhesive system, which will provide an adequate bond
between rubber and riser pipe surface to ascertain designed life of services in seawater splash zone.
Adhesive system shall depend upon the type of rubber compound and method of vulcanization.
6.1.6 The client shall at least provide the following characteristics of riser lines or pipe sections to be
coated with polychloroprene or EPDM rubber:
a) nominal diameter;
b) wall thickness;
c) type of pipe joint;
d) design temperature (max-min);
e) operating temperature (max-min);
f) design pressure, service – seawater splash zone;
g) chemical analysis of seawater and designed service life of coating while indicating special site
requirements.
6.1.7 Rubber compound and adhesive system shall be selected on the basis of previous project
references and industry experience to ascertain that it is suitable for specified services. If this requirement
could not be satisfied, appropriate testing shall be carried out as per manufacturer’s recommendations.
Where it is not possible to test sample elastomer lining in actual conditions, specified service conditions
shall be simulated accurately.
ISO 18797-1:2016(E)
6.1.8 Polychloroprene and EPDM coating as described in this document comprise the following coats
or layers of coating materials:
a) 1st coat — primer coat that shall be compatible with the bonding agent and is bonded adequately to
the steel substrate;
b) 2nd coat — bonding agent that shall be compatible with both the primer and the elastomer coating;
c) 3rd coat — tack cement rubber solution (rubber compound solution), if deemed necessary;
d) 4th coat — elastomeric coating material (polychloroprene or EPDM).
6.1.9 Elastomer compound and adhesive manufacturing facility and in-house testing laboratory shall
be in compliance with the quality management system requirements.
6.1.10 The materials shall be compatible with each other to provide adequate bonding when vulcanized
to enhance inbuilt chemical and physical properties as desired for corrosion protection of riser pipes in
the splash zone.
6.1.11 Nylon tape to be wrapped temporarily over the elastomer coated pipe shall be of sufficient
strength to withstand tension and secure coating tightly adherent to substrate. It shall also withstand
autoclave temperatures during the vulcanization process.
6.1.12 The contractor/applicator shall provide the following to the client for review and approvals, well
before entering into actual application of elastomer coating on specified surfaces:
a) name and number of elastomer compound;
b) test panels coated with proposed elastomer compound and vulcanized as a reference sample;
c) test certificate by in-house laboratory as well as client’s designated external laboratory certifying
qualification of polychloroprene and/or EPDM, meeting desired chemical and physical properties
along with satisfaction of special considerations, if any.
6.1.13 Clearance for usage shall be obtained for coating materials to be used on riser pipes in seawater
splash zone from local and
...