oSIST prEN ISO 18797-2:2020

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

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

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

Industries du pétrole, de la pétrochimie et du gaz naturel — Protection de la corrosion externe des tubes de

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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

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

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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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