Determination of the resistance to cryogenic spill of insulation materials - Part 2: Vapour exposure (ISO 20088-2:2020)

This part of ISO 20088 describes a method for determining the resistance to cryogenic spray on Cryogenic Spillage Protection (CSP) systems. It is applicable where CSP systems are installed on carbon steel and will be in contact with cryogenic fluids. Liquid jet release is potentially formed at high pressure LNG handling section in LNG liquefaction unit, e.g., around 40 - 60 bar operating pressure. Due to high velocity discharge, it may cause severe condition for cryogenic protection coating by large momentum with extreme cryogenic temperature. Liquid nitrogen is used as the cryogenic medium since it has a lower boiling point than liquid natural gas or liquid oxygen and it is not flammable. Additionally, it can be safely used for experiment. Part 2 of the standard covers vapour phase exposure conditions. The test laboratory is responsible to conduct an appropriate risk assessment according to local regulation in order to consider the impact of liquid and gaseous nitrogen exposure to equipment and personnel.

Bestimmung der Beständigkeit von Isoliermaterialien bei kryogenem Auslaufen - Teil 2: Dampfphase (ISO 20088-2:2020)

Dieses Dokument beschreibt ein Verfahren zur Bestimmung des Widerstands von CSP-Systemen (Schutz gegen kryogenen Auslauf, en: cryogenic spill protection) gegen Dampf, der aus einer Freisetzung einer kryogenen Flüssigkeit entsteht, wobei der Flüssigkeitsgehalt praktisch null ist. Es ist anwendbar, wenn CSP-Systeme auf Kohlenstoffstahl installiert sind.
Die Freisetzung von Flüssigkeitsstrahlen kann durch Freisetzung von verflüssigtem Erdgas (LNG, en: Liquified Natural Gas) aus Prozessanlagen, die unter Druck stehen, entstehen, z. B. nutzen einige Verflüssigungsprozesse einen Betriebsdruck von 40 – 60 bar. Jedoch wird in bestimmten Abständen vom Freisetzungspunkt erwartet, dass der Flüssigkeitsanteil so abnimmt, dass eine Flüssigkeitskühlung im Strom praktisch keine Auswirkung hat.
Es sollte beachtet werden, dass es bei dieser Prüfung nicht praktikabel ist, den gesamten Bereich der unter realen Anlagenbedingungen auftretenden kryogenen Prozessbedingungen abzudecken; insbesondere deckt die Prüfung keine Freisetzungen von kryogenen Hochdruckflüssigkeiten ab, die in Kühlkreisläufen und in LNG-Strömen unmittelbar nach der Verflüssigung vorzufinden sind.
Als kryogenes Medium wird flüssiger Stickstoff (LN2) genutzt, da das Material bei den in dieser Norm beschriebenen Drücken sicher gehandhabt werden kann.
ISO 20088-1 deckt die Freisetzung von kryogenen Flüssigkeiten ab, die bei durch CSP geschützten Stahlarbeiten zu einer Flüssigkeitsansammlung führen können. ISO 20088-3 deckt strahlförmige Freisetzungsbedingungen ab, unter denen im Strom Flüssigkeit vorherrschend ist.

Détermination de la résistance des matériaux d'isolation thermique suite à un refroidissement cryogénique - Partie 2: Phase vapeur (ISO 20088-2:2020)

Le présent document décrit une méthode pour déterminer la résistance de systèmes de protection contre la fuite cryogénique (CSP) à la vapeur générée par une émission de liquide cryogénique dont la teneur en liquide est quasi-nulle. Cette méthode s'applique quand des systèmes CSP sont installés sur de l'acier au carbone.
L'essai fourni dans ce document ne couvre pas les émissions de liquide cryogénique sous haute pression que l'on peut trouver dans les circuits de réfrigération et dans les courants de GNL immédiatement après la liquéfaction.

Ugotavljanje obstojnosti izolacijskih materialov pri puščanju v kriogenem območju - 2. del: Izpostavljenost pari (ISO 20088-2:2020)

General Information

Status
Published
Public Enquiry End Date
03-Apr-2019
Publication Date
05-May-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
17-Apr-2020
Due Date
22-Jun-2020
Completion Date
06-May-2020

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SLOVENSKI STANDARD
SIST EN ISO 20088-2:2020
01-junij-2020

Ugotavljanje obstojnosti izolacijskih materialov pri puščanju v kriogenem območju

- 2. del: Izpostavljenost pari (ISO 20088-2:2020)

Determination of the resistance to cryogenic spill of insulation materials - Part 2: Vapour

exposure (ISO 20088-2:2020)

Bestimmung der Beständigkeit von Isoliermaterialien bei kryogenem Auslaufen - Teil 2:

Dampfphase (ISO 20088-2:2020)
Détermination de la résistance des matériaux d'isolation thermique suite à un
refroidissement cryogénique - Partie 2: Phase vapeur (ISO 20088-2:2020)
Ta slovenski standard je istoveten z: EN ISO 20088-2:2020
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
SIST EN ISO 20088-2:2020 en,fr,de

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

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SIST EN ISO 20088-2:2020
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SIST EN ISO 20088-2:2020
EN ISO 20088-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 75.200
English Version
Determination of the resistance to cryogenic spill of
insulation materials - Part 2: Vapour exposure (ISO 20088-
2:2020)

Détermination de la résistance des matériaux Bestimmung der Beständigkeit von Isoliermaterialien

d'isolation thermique suite à un refroidissement bei kryogenem Auslaufen - Teil 2: Dampfphase (ISO

cryogénique - Partie 2: Phase vapeur (ISO 20088- 20088-2:2020)
2:2020)
This European Standard was approved by CEN on 31 March 2020.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20088-2:2020 E

worldwide for CEN national Members.
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SIST EN ISO 20088-2:2020
EN ISO 20088-2:2020 (E)
Contents Page

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

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SIST EN ISO 20088-2:2020
EN ISO 20088-2:2020 (E)
European foreword

This document (EN ISO 20088-2:2020) has been prepared by Technical Committee ISO/TC 67/SC 9

"Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries"

in collaboration with Technical Committee CEN/TC 282 “Installation and equipment for LNG” the

secretariat of which is held by AFNOR.

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 October 2020, and conflicting national standards shall

be withdrawn at the latest by October 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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 20088-2:2020 has been approved by CEN as EN ISO 20088-2:2020 without any

modification.
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SIST EN ISO 20088-2:2020
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SIST EN ISO 20088-2:2020
INTERNATIONAL ISO
STANDARD 20088-2
First edition
2020-01
Determination of the resistance
to cryogenic spill of insulation
materials —
Part 2:
Vapour exposure
Détermination de la résistance des matériaux d'isolation thermique
suite à un refroidissement cryogénique —
Partie 2: Phase vapeur
Reference number
ISO 20088-2:2020(E)
ISO 2020
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(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
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test configurations ............................................................................................................................................................................................. 2

5 Construction of the test apparatus and substrates ........................................................................................................... 2

5.1 Apparatus .................................................................................................................................................................................................... 2

5.2 Materials and tolerances ................................................................................................................................................................ 3

5.3 Release nozzle.......................................................................................................................................................................................... 3

5.3.1 Nozzle construction ...................................................................................................................................................... 3

5.3.2 Nozzle position .................................................................................................................................................................. 4

5.4 Test assembly supports ................................................................................................................................................................... 4

5.5 Test specimen and recirculation chamber ...................................................................................................................... 4

6 Cryogenic spill protection materials ............................................................................................................................................... 5

6.1 General ........................................................................................................................................................................................................... 5

6.2 Wet applied coating systems ....................................................................................................................................................... 6

6.3 Preformed system testing .............................................................................................................................................................. 6

7 Instrumentation for test specimens ................................................................................................................................................. 6

7.1 General ........................................................................................................................................................................................................... 6

7.2 Thermocouple location .................................................................................................................................................................... 6

8 Test environment ................................................................................................................................................................................................. 7

9 Test procedure ........................................................................................................................................................................................................ 7

10 Repeatability and reproducibility ...................................................................................................................................................... 8

11 Uncertainty of measurement ................................................................................................................................................................... 8

12 Test report ................................................................................................................................................................................................................... 8

13 Practical applications of test results ................................................................................................................................................ 9

13.1 General ........................................................................................................................................................................................................... 9

13.2 Performance criteria .......................................................................................................................................................................10

13.2.1 General...................................................................................................................................................................................10

13.2.2 Coatings and spray-applied materials — Substrate temperature ......................................10

13.2.3 Systems and assemblies .........................................................................................................................................10

13.3 Factors affecting the validity of the test .........................................................................................................................11

13.3.1 General...................................................................................................................................................................................11

13.3.2 Failure at nozzle ............................................................................................................................................................11

13.3.3 Failure of thermocouples .................. .....................................................................................................................11

Annex A (normative) Methods for fixing thermocouples ............................................................................................................12

Annex B (informative) Classification .................................................................................................................................................................13

Bibliography .............................................................................................................................................................................................................................15

© ISO 2020 – All rights reserved iii
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(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. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore

structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 9, Liquefied natural

gas installations and equipment, in collaboration with the European Committee for Standardization

(CEN) Technical Committee CEN/TC 282, Installation and equipment for LNG, in accordance with the

Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 20088 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
Introduction

The test is intended to be, as far as practicable, representative of a potential accidental pressurised

release of cryogenic LNG material manufactured in industrial plants. The test includes

a) release from of cryogenic liquid under pressure, and

b) scenarios where the conditions in the jet characterized predominantly by gaseous exposure.

Liquid jet release may be formed upon release of Liquified Natural Gas (LNG) from process equipment

operating at pressure, e.g., some liquefaction processes utilise 40 - 60 bar operating pressure. However,

at specific distances from the release point, it is expected that the liquid fraction will diminish such

that there is practically no effect from liquid cooling in the stream.

This test is designed to give an indication of how cryogenic spill protection materials will perform in a

sudden exposure to cryogenic jet where it is expected that little or no liquid fraction is present.

The dimensions of the test specimen might be smaller than typical items of structure and plant. The

liquid cryogenic jet mass flow rates can be substantially less than that which might occur in a credible

event. However, individual thermal loads imparted to the cryogenic spill protection materials, from

the cryogenic release defined in the procedure described in this document, have been shown to

be representative of areas exposed to a cryogenic LNG accidental release where little or no liquid is

present.
© ISO 2020 – All rights reserved v
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SIST EN ISO 20088-2:2020
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SIST EN ISO 20088-2:2020
INTERNATIONAL STANDARD ISO 20088-2:2020(E)
Determination of the resistance to cryogenic spill of
insulation materials —
Part 2:
Vapour exposure

CAUTION — The attention of all persons concerned with managing and carrying out cryogenic

spill testing is drawn to the fact that liquid nitrogen testing can be hazardous and that there is a

danger of oxygen condensation (risk of explosion), receiving a ’cold burn’ and/or the possibility

that harmful gases (risk of anoxia) can be evolved during the test. Mechanical and operational

hazards can also arise during the construction of the test elements or structures, their testing

and disposal of test residues.

An assessment of all potential hazards and risks to health shall be made, and safety precautions

shall be identified and provided. Appropriate training and Personal Protection Equipment (PPE)

shall be given to relevant personnel.

The test laboratory is responsible for conducting an appropriate risk assessment in order to

consider the impact of liquid and gaseous nitrogen exposure to equipment, personnel and the

environment.
1 Scope

This document describes a method for determining the resistance of Cryogenic Spill Protection (CSP)

systems to vapour generated from a cryogenic liquid release where the liquid content is practically

zero. It is applicable where CSP systems are installed on carbon steel.

The test provided in this document is not applicable to high pressure cryogenic liquid releases that can

be found in refrigeration circuits and in LNG streams immediately post-liquefaction.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 22899-1, Determination of the resistance to jet fires of passive fire protection materials — Part 1:

General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2020 – All rights reserved 1
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
3.1
cryogenic spill protection
CSP

coating or cladding arrangement, or free-standing system which, in the event of a cryogenic jet release,

provides insulation to restrict the heat transfer rate from the substrate
3.2
limiting temperature

minimum temperature that the equipment, assembly or structure that is protected can reach

3.3
nozzle
assembly from which the cryogenic liquid is released as a jet
3.4
sponsor
person or organization who/which requests a test
3.5
specimen owner
person or company that holds or produces a material to test
3.6
cooling power
amount of heat transferred per unit area per unit time from a surface (W/m )
4 Test configurations

The test is conducted with the plate specimen placed vertically. The material to be tested is exposed

to a liquid nitrogen release under pressure where the liquid fraction is practically zero (i.e. gaseous

exposure). Due to safety concerns, the test should only be performed outside unless there are sufficient

safeguards implemented to mitigate the confined space and LN (liquid nitrogen) safety risks.

5 Construction of the test apparatus and substrates
5.1 Apparatus
The key items required for the test are the following.

5.1.1 Nozzle and cryogenic liquid feed assembly, where the temperature and pressure of the liquid

can be measured at the point the liquid enters the nozzle.
5.1.2 Environmental chamber, (3-sided plastic tunnel) up to a length of 6 m.

5.1.3 Liquid nitrogen, of sufficient volume for the test duration supplied from a tanker capable of

offload via a pump to generate the required stable pressure at the nozzle.
5.1.4 Carbon steel specimen, protected with CSP.

5.1.5 Thermocouples, to determine the temperature as a function of time in the steel specimen and

the atmosphere immediately in front of the test specimen.
2 © ISO 2020 – All rights reserved
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
5.2 Materials and tolerances

The steel grade used for the test shall be recorded. Where welded, construction shall be representative

or the as-built structure. All dimensions are in millimetres and, unless otherwise stated, the following

tolerances shall be used.
— whole number ±1,0 mm;
— decimal to point ,0 ±0,4 mm;
— decimal to point ,00 ±0,2 mm;
— angles ±0’ 30”;
— radius ±0,4 mm.

Test specimen shall be a structural steelwork test specimen as described in ISO 22899-1.

5.3 Release nozzle
5.3.1 Nozzle construction

Liquid nitrogen is released towards the specimen from a nozzle. An example of a suitable nozzle has

the following characteristics. The nozzle of length 150 mm, constructed from a stainless-steel pipe of

nominal diameter 10 mm ± 0,5 mm and of outside diameter 20 mm to 30 mm, giving a wall thickness

between 5 mm and 10 mm. The nozzle shall not be tapered and the end shall be clean cut, with no

chamfering of pipe walls. The nozzle is fed with liquid nitrogen from a DN50 diameter schedule 40S

stainless steel pipe, with a machined section reducing in internal diameter to 10 mm over a 250 mm

length as shown in Figure 1.
Dimensions in millimetres
Key
1 welds
2 slip-on flange
3 reducing section
4 butt weld
5 straight-sided nozzle
Figure 1 — Feed pipe and nozzle construction
© ISO 2020 – All rights reserved 3
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
5.3.2 Nozzle position

The nozzle shall be positioned horizontally in front of the test specimen, aligned with the centre point

such that the cryogenic release impacts normal to the plate specimen as shown in Figure 2. The tip of

the nozzle shall be located to give the required cooling power described in Clause 8.

EXAMPLE 5 000 mm ± 10 mm from the protected surface of the test specimen when the average outlet

pressure is 8 barg (0,8 MPa) [standard deviation of 0,8 barg (0,08 MPa)] and liquid temperature lower than

−170 C (An example of specimen support and side view configuration is shown in Figure 2).

5.4 Test assembly supports

The test assembly shall be supported using material resistant to cryogenic temperatures.

Dimensions in millimetres
Key
1 release nozzle (piping omitted for clarity
2 recirculation chamber (insulated on back surface)
3 protective chamber
4 environmental chamber
5 recirculation chamber and protective chamber supports
Figure 2 — Example of vapour test (side view)
5.5 Test specimen and recirculation chamber

It shall be the primary test piece to which the CSP is applied to the internal surface of the box. Dimension

shall be as described in ISO 22899-1. To provide extra support and stability, the protective chamber

shall be attached to the rear of the recirculation chamber as shown in Figure 3. Insulation board (U

Value maximum 1,25 W/m .K) shall be affixed to the rear of the recirculation chamber.

4 © ISO 2020 – All rights reserved
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
Dimensions in millimetres
Thirteen holes drilled.
Figure 3 — Recirculation chamber and test sample
6 Cryogenic spill protection materials
6.1 General

CSP systems generally come in two forms; wet applied materials/coatings and preformed systems.

Preformed systems include boards, tiles, blankets, sandwich panels, etc. and are characterized by

systems that include joints and fixings. Preformed systems can be used in conjunction with wet applied

materials.

The application/installation methodology, including any necessary surface preparation, reinforcement,

thickness, top-coats, field joints, etc. shall be determined by the sponsor and/or specimen owner and

details provided for inclusion within the test report.

The thickness shall be measured at the positions specified in Figure 4 for sprayed applied systems. The

measurement positions indicated shall be regarded as approximate. For preformed systems, thickness

shall be measured for the protective layer at locations proximal to those presented in Figure 4. If there

are clear signs of thinning or thickening at positions away from those indicated for measurement,

additional measurements should be taken.
© ISO 2020 – All rights reserved 5
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
Figure 4 — Thickness measurement points for test specimen
6.2 Wet applied coating systems

For CSP systems/materials that are wet applied as coatings, the CSP systems/materials should be

applied in the same manner as will be used in service.
6.3 Preformed system testing

For preformed systems, the system shall also be installed in the same manner as will be used in service.

The method of installing the system shall include representative joints, fixings and wet applied material

interface details; a minimum of two joints should be included as follows.
a) One horizontal joint located over thermocouples: 3, 14 and 4 in Figure 5.
b) One vertical joint located over thermocouples 4, 7, 10 as shown in Figure 5.

Joints should be tested, either in a single test or separate tests, as determined by the sponsor and/or

specimen owner, ensuring the details are representative in accordance with Clause 10.

7 Instrumentation for test specimens
7.1 General

Thermocouples shall be fastened to all test specimens. The type and fixing shall be in accordance with

one of the methods described in Annex A.
Readings shall be recorded at intervals of not more than 1 second.
7.2 Thermocouple location

Thermocouples are positioned as shown in Figure 5. For thermocouple locations shown in red, these

shall be positioned at a distance of 10 mm ± 2 mm away from the test samples (i.e. in the test atmosphere).

Thermocouples shown in black shall be within the steel substrate, as described in Annex A.

6 © ISO 2020 – All rights reserved
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SIST EN ISO 20088-2:2020
ISO 20088-2:2020(E)
Dimension in millimetres
Key
1 thermocouples 13 to 18
2 thermocouples 1 to 12

NOTE Thermocouple locations for specimen. Red thermocouples are in front of the box whereas the black

marks are in relation to thermocouples in the steel.
Figure 5 — Vapour test thermocouple configuration (front view)
8 Test environment

The test shall be preferably operated outdoors. If curing and conditioning is conducted under different

conditions, it shall be clearly stated in the test report.

The test shall be carried out in an environment in which the effects of the weather do not significantly

affect the test and the following conditions shall apply.

— The distance of the nozzle from the test specimen and the pressure measured at the exit of the

schedule 40 feed pipe prior to entry to the nozzle should be such that the thermocouples in front of

an unprotected bare steel back face of the sample reads in the range
...

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