ISO/FDIS 18797-2
(Main)Petroleum, petrochemical and natural gas industries -- External corrosion protection of risers by coatings and linings
Petroleum, petrochemical and natural gas industries -- External corrosion protection of risers by coatings and linings
Industries du pétrole, de la pétrochimie et du gaz naturel -- Protection de la corrosion externe des tubes de production par revêtements et doublures
General Information
Standards Content (sample)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 18797-2
ISO/TC 67
Petroleum, petrochemical and natural
Secretariat: NEN
gas industries - External corrosion
Voting begins on:
2021-06-01 protection of risers by coatings and
linings —
Voting terminates on:
2021-07-27
Part 2:
Maintenance and field repair coatings
for riser pipes
Industries du pétrole, de la pétrochimie et du gaz naturel —
Protection de la corrosion externe des tubes de production par
revêtements et doublures —
Partie 2: Entretien et réparation in situ des tubes de production
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 18797-2:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 18797-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 18797-2:2021(E)
Contents Page
Foreword ........................................................................................................................................................................................................................................vi
Introduction ..............................................................................................................................................................................................................................vii
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ...................................................................................................................................................................................... 1
3 Terms and definitions ..................................................................................................................................................................................... 4
4 Symbols and abbreviated terms ........................................................................................................................................................... 7
4.1 Symbols ......................................................................................................................................................................................................... 7
4.2 Abbreviated terms ............................................................................................................................................................................... 7
5 Coating types ............................................................................................................................................................................................................ 7
6 General requirements ..................................................................................................................................................................................... 8
6.1 Client’s requirements ........................................................................................................................................................................ 8
6.1.1 Approval of repair coating and repair method ...................................................................................... 8
6.1.2 Specification of purchase order mandatory information ............................................................. 8
6.1.3 Specification of purchase order additional information ............................................................... 9
6.2 Contractor’s requirements ............................................................................................................................................................ 9
6.2.1 Documented information ......................................................................................................................................... 9
6.2.2 Marking of coating materials .............................................................................................................................10
6.3 Rounding ...................................................................................................................................................................................................10
6.4 Conformity to requirements ......... ............................................................................................................................................10
6.5 Criteria for the condition assessment of an existing coating .......................................................................10
6.5.1 General – Evaluation of coating condition ..............................................................................................10
6.5.2 Applicable inspection techniques ..................................................................................................................11
7 Qualification processes and application procedures ..................................................................................................11
7.1 General ........................................................................................................................................................................................................11
7.2 APS and ITP .............................................................................................................................................................................................12
7.2.1 General...................................................................................................................................................................................12
7.2.2 APS ............................................................................................................................................................................................12
7.2.3 ITP .............................................................................................................................................................................................13
7.3 Technical assessment of coating conformity .............................................................................................................13
7.4 Procedure qualification trial ....................................................................................................................................................13
7.5 Pre-production trial .........................................................................................................................................................................14
7.6 Production, testing and inspection .....................................................................................................................................15
7.6.1 General...................................................................................................................................................................................15
7.6.2 Inspection documents and traceability .....................................................................................................15
8 Selection criteria for repair coatings ...........................................................................................................................................15
8.1 General ........................................................................................................................................................................................................15
8.2 Application constraints.................................................................................................................................................................16
8.2.1 Wet substrates ................................................................................................................................................................16
8.2.2 Contamination by soluble salts ........................................................................................................................17
8.2.3 Dust contamination ....................................................................................................................................................17
8.2.4 Contamination by oil, grease and other petroleum-like products .....................................17
8.2.5 Compatibility with existing coating ..............................................................................................................17
8.2.6 Feasibility of surface cleaning ...........................................................................................................................18
8.2.7 Space and riser access constraints ................................................................................................................18
8.2.8 Time constraints ...........................................................................................................................................................18
8.2.9 Temperatures and relative humidity ...........................................................................................................18
8.2.10 Coating continuity .......................................................................................................................................................18
8.3 Operational conditions..................................................................................................................................................................19
8.3.1 Resistance to ageing, weathering and water ........................................................................................19
8.3.2 Resistance to mechanical loads ........................................................................................................................19
8.3.3 Interaction with cathodic protection ..........................................................................................................19
© ISO 2021 – All rights reserved iii---------------------- Page: 3 ----------------------
ISO/FDIS 18797-2:2021(E)
9 Test programs .......................................................................................................................................................................................................19
9.1 Substrate conditions used for tests ....................................................................................................................................19
9.2 Inspections, tests and frequencies ......................................................................................................................................19
9.3 Thickness testing ...............................................................................................................................................................................20
9.4 Retest ............................................................................................................................................................................................................20
10 Non-crystalline low-viscosity polyolefin-based coatings ........................................................................................21
10.1 Coating identification .....................................................................................................................................................................21
10.2 Description of the coatings ........................................................................................................................................................21
10.3 Surface preparation .........................................................................................................................................................................22
10.4 Application of coatings ..................................................................................................................................................................22
10.4.1 General...................................................................................................................................................................................22
10.4.2 Overlap ..................................................................................................................................................................................22
10.5 Testing of coatings ............................................................................................................................................................................22
10.5.1 General...................................................................................................................................................................................22
10.5.2 Thickness .............................................................................................................................................................................22
10.5.3 Glass transition temperature and crystallization temperature ............................................23
10.5.4 Holiday detection .........................................................................................................................................................23
10.5.5 Drip resistance ................................................................................................................................................................23
10.5.6 Adhesion to pipe surface and existing coating .................. ..................................................................23
10.5.7 Lap shear resistance ..................................................................................................................................................24
10.5.8 Specific electrical insulation resistance ....................................................................................................24
10.5.9 Impact resistance .........................................................................................................................................................24
10.5.10 Indentation resistance .............................................................................................................................................24
10.5.11 Cathodic disbondment resistance ..................................................................................................................25
10.5.12 Resistance to ageing and weathering .................. ........................................................................................25
10.5.13 Peel strength between layers of outer wrap .........................................................................................25
10.5.14 Thermal ageing resistance ...................................................................................................................................26
10.5.15 Hot-water immersion test ....................................................................................................................................26
11 Petrolatum and wax-based tape wrap systems .................................................................................................................31
11.1 Coating identification .....................................................................................................................................................................31
11.2 Description of the tape wrap systems ......... .....................................................................................................................32
11.2.1 Petrolatum tape wrap systems (type 11A) ............................................................................................32
11.2.2 Wax-based tape wrap systems (type 11B) .............................................................................................32
11.3 Surface preparation .........................................................................................................................................................................32
11.4 Application of coating systems ..............................................................................................................................................32
11.4.1 General...................................................................................................................................................................................32
11.4.2 Overlap ..................................................................................................................................................................................32
11.5 Testing of the coating systems ................................................................................................................................................33
11.5.1 General...................................................................................................................................................................................33
11.5.2 Density ...................................................................................................................................................................................33
11.5.3 Dielectric strength .......................................................................................................................................................33
11.5.4 Thickness .............................................................................................................................................................................33
11.5.5 Holiday detection .........................................................................................................................................................34
11.5.6 Impact resistance .........................................................................................................................................................34
11.5.7 Specific electrical insulation resistance ....................................................................................................34
11.5.8 Cathodic disbondment resistance ..................................................................................................................34
11.5.9 Adhesion to pipe surface and existing coating .................. ..................................................................34
11.5.10 Drip resistance ................................................................................................................................................................35
11.5.11 Hot water immersion test .....................................................................................................................................35
11.5.12 Resistance to ageing and weathering .................. ........................................................................................35
12 Polychloroprene-based elastomeric coatings .....................................................................................................................41
12.1 Coating identification .....................................................................................................................................................................41
12.2 Description of the coatings ........................................................................................................................................................41
12.3 Surface preparation .........................................................................................................................................................................41
12.4 Application of the coating ...........................................................................................................................................................41
12.4.1 General...................................................................................................................................................................................41
12.4.2 Overlap ..................................................................................................................................................................................42
iv © ISO 2021 – All rights reserved---------------------- Page: 4 ----------------------
ISO/FDIS 18797-2:2021(E)
12.5 Testing of the coatings ...................................................................................................................................................................42
12.5.1 General...................................................................................................................................................................................42
12.5.2 Visual appearance ........................................................................................................................................................42
12.5.3 Thickness .............................................................................................................................................................................42
12.5.4 Holiday detection .........................................................................................................................................................42
12.5.5 Hardness ..............................................................................................................................................................................42
12.5.6 Adhesion to pipe surface and existing coating .................. ..................................................................42
12.5.7 Cathodic disbondment resistance ..................................................................................................................43
12.5.8 Density ...................................................................................................................................................................................43
12.5.9 Rheometer curve ..........................................................................................................................................................43
12.5.10 Tensile strength .............................................................................................................................................................43
12.5.11 Elongation at break .................. ......................................................................................................................... ..........43
12.5.12 Tear strength ....................................................................................................................................................................43
12.5.13 Electrical volume resistivity ................................................................................................................................43
12.5.14 Ozone resistance ...........................................................................................................................................................43
12.5.15 Resistance to seawater ............................................................................................................................................44
12.5.16 Hot-water immersion test ....................................................................................................................................44
12.5.17 Thermal ageing resistance ...................................................................................................................................44
12.5.18 Resistance to ageing and weathering .................. ........................................................................................44
13 Liquid-applied epoxy coatings ............................................................................................................................................................46
13.1 Coating identification .....................................................................................................................................................................46
13.2 Description of the liquid-applied epoxy coating .....................................................................................................47
13.3 Surface preparation .........................................................................................................................................................................47
13.4 Application of the coatings ........................................................................................................................................................47
13.4.1 General...................................................................................................................................................................................47
13.4.2 Overlap ..................................................................................................................................................................................47
13.5 Testing of the coatings ...................................................................................................................................................................47
13.5.1 General...................................................................................................................................................................................47
13.5.2 Dry-film thickness .......................................................................................................................................................48
13.5.3 Holiday detection .........................................................................................................................................................48
13.5.4 Hardness ..............................................................................................................................................................................48
13.5.5 Impact resistance .........................................................................................................................................................48
13.5.6 Indentation resistance .............................................................................................................................................48
13.5.7 Specific electrical insulation resistance ....................................................................................................48
13.5.8 Cathodic disbondment resistance ..................................................................................................................49
13.5.9 Adhesion to pipe surface and existing coating .................. ..................................................................49
13.5.10 Thermal ageing resistance ...................................................................................................................................49
13.5.11 Hot-water immersion test ....................................................................................................................................49
13.5.12 Resistance to ageing and weathering .................. ........................................................................................49
Annex A (informative) Likelihood of exposure in splash zone area .................................................................................53
Annex B (informative) Tests for coatings applied on wet substrates ..............................................................................55
Bibliography .............................................................................................................................................................................................................................64
© ISO 2021 – All rights reserved v---------------------- Page: 5 ----------------------
ISO/FDIS 18797-2:2021(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 partic...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.