Petroleum, petrochemical and natural gas industries - External corrosion protection of risers by coatings and linings - Part 2: Maintenance and field repair coatings for riser pipes (ISO 18797-2:2021)

This document specifies the selection criteria and minimum requirements for protective coating systems for field maintenance and repair of risers exposed to conditions in the splash zone.
This document does not cover the selection of techniques and materials used to restore integrity of the risers to be coated.
This document neither covers the selection of additional mechanical protective materials that are not part of the described coating systems included in this document.

Erdöl-, petrochemische und Erdgasindustrie - Äußerer Korrosionsschutz von Steigleitungen durch Beschichtungen und Auskleidungen - Teil 2: Wartungs- und Reparaturbeschichtungen für Steigleitungen (ISO 18797-2:2021)

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 18797-2:2021)

Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Zunanja protikorozijska zaščita dvižnih cevi s prevlekami in oblogami - 2. del: Vzdrževanje in popravilo proizvodnih cevi na kraju samem (ISO 18797-2:2021)

General Information

Status
Published
Public Enquiry End Date
24-Sep-2020
Publication Date
11-Oct-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Oct-2021
Due Date
11-Dec-2021
Completion Date
12-Oct-2021

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SLOVENSKI STANDARD
SIST EN ISO 18797-2:2021
01-november-2021
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Zunanja protikorozijska zaščita dvižnih cevi s prevlekami in oblogami - 2. del:
Vzdrževanje in popravilo proizvodnih cevi na kraju samem (ISO 18797-2:2021)

Petroleum, petrochemical and natural gas industries - External corrosion protection of

risers by coatings and linings - Part 2: Maintenance and field repair coatings for riser

pipes (ISO 18797-2:2021)
Erdöl-, petrochemische und Erdgasindustrie - Äußerer Korrosionsschutz von
Steigleitungen durch Beschichtungen und Auskleidungen - Teil 2: Wartungs- und
Reparaturbeschichtungen für Steigleitungen (ISO 18797-2:2021)

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 18797-2:2021)
Ta slovenski standard je istoveten z: EN ISO 18797-2:2021
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
SIST EN ISO 18797-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 18797-2:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 18797-2:2021
EN ISO 18797-2
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2021
EUROPÄISCHE NORM
ICS 75.180.10
English Version
Petroleum, petrochemical and natural gas industries -
External corrosion protection of risers by coatings and
linings - Part 2: Maintenance and field repair coatings for
riser pipes (ISO 18797-2:2021)

Industries du pétrole, de la pétrochimie et du gaz Erdöl-, petrochemische und Erdgasindustrie - Äußerer

naturel - Protection de la corrosion externe des tubes Korrosionsschutz von Steigleitungen durch

de production par revêtements et doublures - Partie 2: Beschichtungen und Auskleidungen - Teil 2: Wartungs-

Entretien et réparation in situ des tubes de production und Reparaturbeschichtungen für Steigleitungen (ISO

(ISO 18797-2:2021) 18797-2:2021)
This European Standard was approved by CEN on 28 August 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18797-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 18797-2:2021
EN ISO 18797-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 18797-2:2021
EN ISO 18797-2:2021 (E)
European foreword

This document (EN ISO 18797-2:2021) 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 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 2022, and conflicting national standards shall

be withdrawn at the latest by March 2022.

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.

Any feedback and questions on this document should be directed to the users’ national standards

body/national committee. A complete listing of these bodies can be found on the CEN website.

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, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 18797-2:2021 has been approved by CEN as EN ISO 18797-2:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 18797-2:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 18797-2:2021
INTERNATIONAL ISO
STANDARD 18797-2
First edition
2021-09
Petroleum, petrochemical and natural
gas industries — External corrosion
protection of risers by coatings and
linings —
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
Reference number
ISO 18797-2:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 18797-2:2021
ISO 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: 8 ----------------------
SIST EN ISO 18797-2:2021
ISO 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: 9 ----------------------
SIST EN ISO 18797-2:2021
ISO 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: 10 ----------------------
SIST EN ISO 18797-2:2021
ISO 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 ..........................................................................................

...

SLOVENSKI STANDARD
oSIST prEN ISO 18797-2:2020
01-september-2020
Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina -
Zunanja protikorozijska zaščita dvižnih cevi s prevlekami in oblogami - 2. del:
Vzdrževanje in popravilo proizvodnih cevi na kraju samem (ISO/DIS 18797-2:2020)

Petroleum, petrochemical and natural gas industries - External corrosion protection of

risers by coatings and linings - Part 2: Maintenance and field repair coatings for riser

pipes (ISO/DIS 18797-2:2020)
Erdöl-, petrochemische und Erdgasindustrie - Äußerer Korrosionsschutz von
Steigleitungen durch Beschichtungen und Auskleidungen - Teil 2: Wartungs- und
Reparaturbeschichtungen für Steigleitungen (ISO/DIS 18797-2:2020)

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/DIS 18797-2:2020)
Ta slovenski standard je istoveten z: prEN ISO 18797-2
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
oSIST prEN ISO 18797-2:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 18797-2:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 18797-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 18797-2
ISO/TC 67 Secretariat: NEN
Voting begins on: Voting terminates on:
2020-07-03 2020-09-25
Petroleum, petrochemical and natural gas industries -
External corrosion protection of risers by coatings and
linings —
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: Partie 2: Entretien et réparation in situ des tubes de production
ICS: 75.180.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 18797-2:2020(E)
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 SUPPORTING DOCUMENTATION. ISO 2020
---------------------- Page: 3 ----------------------
oSIST prEN ISO 18797-2:2020
ISO/DIS 18797-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 18797-2:2020
ISO/DIS 18797-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................vi

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 3

4 Symbols and abbreviated terms ........................................................................................................................................................... 6

4.1 Symbols ......................................................................................................................................................................................................... 6

4.2 Abbreviated terms ............................................................................................................................................................................... 7

5 Coating types ............................................................................................................................................................................................................ 7

6 General requirements ..................................................................................................................................................................................... 7

6.1 Responsibility of the client ........................................................................................................................................................... 7

6.2 Rounding ...................................................................................................................................................................................................... 7

6.3 Conformance to this document ................................................................................................................................................. 8

7 Qualification processes and application procedures ..................................................................................................... 8

7.1 General ........................................................................................................................................................................................................... 8

7.2 Information to be supplied by the client .......................................................................................................................... 8

7.3 APS and ITP ................................................................................................................................................................................................ 9

7.4 Coating materials ...............................................................................................................................................................................11

7.5 Technical assessment of coating conformity .............................................................................................................11

7.6 Procedure qualification trial ....................................................................................................................................................12

7.7 Pre-production trial .........................................................................................................................................................................12

7.8 Production, testing and inspection .....................................................................................................................................13

7.8.1 General...................................................................................................................................................................................13

7.8.2 Inspection documents and traceability .....................................................................................................13

8 Selection criteria for repair coatings ...........................................................................................................................................13

8.1 General ........................................................................................................................................................................................................13

8.2 Application constraints.................................................................................................................................................................14

8.2.1 Wet substrates ................................................................................................................................................................14

8.2.2 Contamination by soluble salts ........................................................................................................................15

8.2.3 Dust contamination ....................................................................................................................................................15

8.2.4 Contamination by oil, grease and other petroleum-like products .....................................15

8.2.5 Compatibility with existing coating ..............................................................................................................15

8.2.6 Feasibility of surface cleaning ...........................................................................................................................16

8.2.7 Space and riser access constraints ................................................................................................................16

8.2.8 Time constraints ...........................................................................................................................................................16

8.2.9 Temperatures and relative humidity ...........................................................................................................16

8.2.10 Coating continuity .......................................................................................................................................................16

8.3 Operational conditions..................................................................................................................................................................17

8.3.1 Resistance to ageing, weathering and water ........................................................................................17

8.3.2 Resistance to mechanical loads ........................................................................................................................17

8.3.3 Interaction with cathodic protection ..........................................................................................................17

9 Test programs .......................................................................................................................................................................................................17

9.1 Substrate conditions used for tests ....................................................................................................................................17

9.2 Inspections, tests and frequencies ......................................................................................................................................18

9.3 Retest ............................................................................................................................................................................................................18

10 Non-crystalline low-viscosity polyolefin based coatings .........................................................................................18

10.1 Coating identification .....................................................................................................................................................................18

10.2 Description of the coatings ........................................................................................................................................................19

10.3 Surface preparation .........................................................................................................................................................................19

10.4 Application of coatings ..................................................................................................................................................................20

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 18797-2:2020
ISO/DIS 18797-2:2020(E)

10.4.1 General...................................................................................................................................................................................20

10.4.2 Overlap ..................................................................................................................................................................................20

10.5 Testing of coatings ............................................................................................................................................................................20

10.5.1 General...................................................................................................................................................................................20

10.5.2 Thickness .............................................................................................................................................................................20

10.5.3 Glass transition temperature and crystallization temperature ............................................21

10.5.4 Holiday detection .........................................................................................................................................................21

10.5.5 Drip resistance ................................................................................................................................................................21

10.5.6 Adhesion to pipe surface and existing coating .................. ..................................................................21

10.5.7 Lap shear resistance ..................................................................................................................................................22

10.5.8 Specific electrical insulation resistance ....................................................................................................22

10.5.9 Impact resistance .........................................................................................................................................................22

10.5.10 Indentation resistance .............................................................................................................................................22

10.5.11 Cathodic disbondment resistance ..................................................................................................................22

10.5.12 Resistance to ageing and weathering .................. ........................................................................................23

10.5.13 Peel strength between layers of outer wrap .........................................................................................23

10.5.14 Thermal ageing resistance ...................................................................................................................................23

10.5.15 Hot-water immersion test ....................................................................................................................................24

11 Petrolatum and wax-based tape wrap systems .................................................................................................................30

11.1 Coating identification .....................................................................................................................................................................30

11.2 Description of the tape wrap systems ......... .....................................................................................................................30

11.2.1 Petrolatum tape wrap systems (type 11A) ............................................................................................30

11.2.2 Wax-based tape wrap systems (type 11B) .............................................................................................31

11.3 Surface preparation .........................................................................................................................................................................31

11.4 Application of coating systems ..............................................................................................................................................31

11.4.1 General...................................................................................................................................................................................31

11.4.2 Overlap ..................................................................................................................................................................................31

11.5 Testing of the coating systems ................................................................................................................................................32

11.5.1 General...................................................................................................................................................................................32

11.5.2 Density ...................................................................................................................................................................................32

11.5.3 Dielectric strength .......................................................................................................................................................32

11.5.4 Thickness .............................................................................................................................................................................32

11.5.5 Holiday detection .........................................................................................................................................................33

11.5.6 Impact resistance .........................................................................................................................................................33

11.5.7 Indentation resistance .............................................................................................................................................33

11.5.8 Specific electrical insulation resistance ....................................................................................................33

11.5.9 Cathodic disbondment resistance ..................................................................................................................33

11.5.10 Adhesion to pipe surface and existing coating .................. ..................................................................34

11.5.11 Drip resistance ................................................................................................................................................................34

11.5.12 Thermal ageing resistance ...................................................................................................................................34

11.5.13 Hot water immersion test .....................................................................................................................................34

11.5.14 Resistance to ageing and weathering .................. ........................................................................................34

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 ...........................................................................................................................................................42

12.4.1 General...................................................................................................................................................................................42

12.4.2 Overlap ..................................................................................................................................................................................42

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 ..............................................................................................................................................................................43

12.5.6 Adhesion to pipe surface and existing coating .................. ..................................................................43

12.5.7 Cathodic disbondment resistance ..................................................................................................................43

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oSIST prEN ISO 18797-2:2020
ISO/DIS 18797-2:2020(E)

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 ................................................................................................................................44

12.5.14 Ozone resistance ...........................................................................................................................................................44

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 ............................................................................................................................................................47

13.1 Coating identification .....................................................................................................................................................................47

13.2 Description of the liquid-applied epoxy coating .....................................................................................................47

13.3 Surface preparation .........................................................................................................................................................................48

13.4 Application of the coatings ........................................................................................................................................................48

13.4.1 General...................................................................................................................................................................................48

13.4.2 Overlap ..................................................................................................................................................................................48

13.5 Testing of the coatings ...................................................................................................................................................................48

13.5.1 General...................................................................................................................................................................................48

13.5.2 Dry-film thickness .......................................................................................................................................................48

13.5.3 Holiday detection .........................................................................................................................................................48

13.5.4 Hardness ..............................................................................................................................................................................49

13.5.5 Impact resistance .........................................................................................................................................................49

13.5.6 Indentation resistance .............................................................................................................................................49

13.5.7 Specific electrical insulation resistance ....................................................................................................49

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 ....................................................................................................................................50

13.5.12 Resistance to ageing and weathering .................. ........................................................................................50

Annex A (informative) Likelihood of exposure in splash zone area .................................................................................54

Bibliography .............................................................................................................................................................................................................................56

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oSIST prEN ISO 18797-2:2020
ISO/DIS 18797-2:2020(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. Internat

...

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