ISO 18797-2:2021 石油、石油化学、天然ガス産業—コーティングとライニングによるライザーの外部腐食保護—パート2：ライザーパイプのメンテナンスと現場修理コーティング | ページ 6

3.1

application procedure specification

APS

document describing procedures, methods, equipment and tools used for coating application

3.2

applicator

contractor (3.6) or subcontractor having the technical capability, knowledge, equipment and qualified personnel that is approved by the client (3.4) for the coating process

3.3

atmospheric zone

external surface (3.26) of a riser (3.19) that extends upward from the splash zone (3.22) up to the top decks of the platform which are exposed to sun, wind, sprays and rains

3.4

client

organization for which professional services are rendered or person that receives a product

3.5

complete coating

installed coating ready for commissioning comprising all individual parts of the coating material

3.6

contractor

organization that agrees to furnish materials and/or perform specific services to the client (3.4)

3.7

dry film thickness

DFT

thickness of a coating remaining over the peaks of a rough surface (3.26) when the coating has hardened

[SOURCE:ISO 19840:2012, 3.1]

3.8

failure mechanism

process that leads to failure

Note 1 to entry: ISO 14224:2016, B.2.2 and Table B.2, define failure causes for all equipment classes.

3.9

failure mode

manner in which failure occurs

Note 1 to entry: ISO 14224:2016, B.2.6, contains tables with relevant failure modes defining failure modes to be used for each equipment class.

3.10

holiday

coating discontinuity that exhibits electrical conductivity when exposed to a specific voltage

3.11

inspection and testing plan

ITP

document providing an overview of the sequence of inspections and tests, including standard references, recommended apparatuses (tools) and testing procedures

3.12

maintenance and repair of a coating

activities dedicated to retaining or restoring the integrity of the existing coating in order to reach a level of protection against corrosion that enables a metallic structure to continue in service operation safely and economically for a determinate period

Note 1 to entry: Maintenance of a coating can refer to the activities to restore either the damages that are localized on small areas and do not require the complete removal of existing coating, or damage over larger areas that require the complete removal of existing coating and installation of field repair coating.

Note 2 to entry: For the purposes of this document, all types of coating used for maintenance and repair of riser coatings are designated as"repair coating".

Note 3 to entry: In ISO 14224:2016, 3.49,"maintenance" is defined as a combination of all technical and management actions intended to retain an item in, or restore it to, a state in which it can perform as required.

Note 4 to entry: In ISO 14224:2016, 3.8,"corrective maintenance" is defined as maintenance carried out after fault detection to effect restoration.

Note 5 to entry:"Repair" is a type of maintenance activity as defined in ISO 14224:2016, Table B.5.

3.13

manufacturer

organization responsible for the manufacture of coating material(s)

3.14

nominal dry film thickness

NDFT

dry film thickness (3.7) specified for each coat or for the whole paint system to achieve the required durability

[SOURCE:ISO 19840:2012, 3.6]

3.15

nominal strain at break

elongation at break

nominal strain at the last recorded data point before the stress is reduced to less than or equal to 10 % of the strength if the break occurs after yielding

Note 1 to entry: Nominal strain is the representation of strain calculated from grip displacement and the gripping distance.

[SOURCE:ISO 527-1:2019, 3.8 and 3.8.1]

3.16

nominal thickness

dimension as specified by the manufacturer (3.13)

Note 1 to entry: The nominal thickness of the complete coating is the calculated sum of the nominal thicknesses of all the layers of the coating before application.

3.17

pre-production trial

PPT

application of coating and subsequent inspection and testing of its properties, to confirm that the application procedure specification (3.1) contains all necessary instructions to install the coatings in conformity with specific minimum requirements, carried out at the job site immediately prior to production

3.18

procedure qualification trial

PQT

application of coating and subsequent inspection and testing of its properties, to confirm that the application procedure specification (3.1) contains all necessary instructions to install the coatings in conformity with minimum requirements, carried out at the premises of the contractor (3.6) or another agreed location

3.19

riser

section of pipeline carrying crude oil or gas between the ocean floor and the upper decks of the platform on offshore structures

Note 1 to entry: In ISO 14224:2016,"riser” is a specific equipment class as per ISO 14224:2016, Table A.4 (level 6) and"coating" is a “maintainable item” for risers, as per ISO 14224:2016, Table A.93.

3.20

self-healing

ability of a coating to restore its original film thickness (leaving no holidays (3.10) as a result), after a 6 mm diameter defect is made down to bare metal

3.21

shift

time period when a crew of workers is at work

3.22

splash zone

external surface (3.26) of a riser (3.19) area above and below the mean water level that is periodically wet and dry due to the influence of the astronomical tides, winds and waves

Note 1 to entry: The limits are as defined by the contract specifications.

3.23

strain at break

strain at the last recorded data point before the stress is reduced to less than or equal to 10 % of the strength if the break occurs prior to yielding

[SOURCE:ISO 527-1:2019, 3.7.2, modified — Note 2 to entry has been deleted.]

3.24

stress at break

stress at which the specimen breaks

Note 1 to entry: Expressed in megapascals (MPa).

[SOURCE:ISO 527-1:2019, 3.6.4, modified — Note 2 to entry has been deleted.]

3.25

submerged zone

external surface (3.26) of a riser (3.19) below the water level

3.26

surface

interface between substrate (3.28) and environment where coating is applied

3.27

surface preparation

method of preparing a surface (3.26) for coating application

Note 1 to entry: ISO 12944-4:2017, Clause 6, contains a comprehensive overview of suitable methods for surface preparation.

3.28

substrate

material from which the riser (3.19) is made

3.29

technical assessment

ta

application of coating and subsequent inspection and testing of its properties to confirm that the coatings are meeting the minimum requirements

Note 1 to entry: Technical assessment is usually carried out under controlled laboratory conditions.

3.30

weld cap

outermost surface (3.26) of the weld