SIST EN ISO 20088-1:2017

Determination of the resistance to cryogenic spillage of insulation materials - Part 1: Liquid phases (ISO 20088-1:2016)

This part of ISO 20088 Part 1 describes a method for determining the resistance to liquid cryogenic spillage on CSP systems. It is applicable where CSP systems are installed on carbon steel and will be in contact with cryogenic fluids.
Liquid nitrogen is used as the cryogenic medium since it has a lower boiling point than liquid natural gas or liquid oxygen. Additionally, it can be safely used for experiment.
Future parts of the standard will cover vapor phase and high pressure jet exposure conditions.

Bestimmung der Beständigkeit von Isoliermaterialien bei kryogenem Auslaufen - Teil 1: Flüssigkeit (ISO 20088-1:2016)

Dieser Teil von ISO 20088 beschreibt ein Verfahren zur Bestimmung der Beständigkeit von kryogenen Auslaufschutzsystemen (CSP) bei kryogenem Auslaufen. Es ist anwendbar, wenn CSP Systeme auf Kohlen-stoffstahl installiert sind und sich in Kontakt mit kryogenen Flüssigkeiten befinden.
Als kryogenes Medium wird flüssiger Stickstoff verwendet, da er einen niedrigeren Siedepunkt als flüssiges Erdgas oder flüssiger Sauerstoff hat. Darüber hinaus kann er sicher bei Versuchen verwendet werden.
Zukünftige Teile der Norm befassen sich mit der Dampfphase und der Exposition unter Hochdruckstrahl-bedingungen.
Das Prüflabor ist für die Durchführung einer angemessenen Risikobewertung nach örtlichen Vorschriften verantwortlich, um die Auswirkung der Exposition von flüssigem und gasförmigem Stickstoff auf die Ausrüstung und das Personal zu prüfen.

Détermination de la résistance des matériaux d'isolation thermique suite à un refroidissement cryogénique - Partie 1: Phase liquide (ISO 20088-1:2016)

ISO 20088-1:2016 décrit une méthode pour déterminer la résistance à une fuite cryogénique liquide sur les systèmes de Protection contre les Fuites Cryogéniques (CSP). Il s'applique quand des systèmes CSP sont installés sur de l'acier au carbone et seront en contact avec des fluides cryogéniques.
L'azote liquide est utilisé comme milieu cryogénique, puisqu'il a un point d'ébullition plus bas que le gaz naturel liquéfié ou l'oxygène liquide. Il peut de plus être utilisé sans danger pour l'expérimentation.
Les parties à venir du présent document traiteront des conditions en phase vapeur et d'émission sous forme de jet.
Il est de la responsabilité du laboratoire d'essai de réaliser une appréciation adéquate du risque suivant la réglementation locale afin de prendre en compte l'impact de l'exposition à l'azote liquide et gazeux sur les équipements et le personnel.

Ugotavljanje obstojnosti izolacijskih materialov pri razlitju v kriogenem področju - 1. del: Tekoča faza (ISO 20088-1:2016)

Ta del standarda ISO 20088 1. del opisuje metodo za ugotavljanje obstojnosti pri razlitju v kriogenem področju v sistemih CSP. Uporablja se, kjer so sistemi nameščeni na ogljikovo jeklo in bodo v stiku s kriogenimi tekočinami. Kot kriogen medij se uporablja tekoči dušik, saj ima nižjo točko vretja kot tekoči zemeljski plin ali tekoči kisik. Poleg tega ga je mogoče varno uporabljati pri eksperimentih. Prihodnji deli standarda bodo zajemali fazo izparevanja in pogoje izpostavljenosti visokotlačnega curka.

General Information

• Status: Published
• Public Enquiry End Date: 05-Jan-2016
• Publication Date: 08-Dec-2016
• ICS: 23.020.40 - Cryogenic vessels
• Technical Committee: DPL - Gas supply
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Nov-2016
• Due Date: 09-Jan-2017
• Completion Date: 09-Dec-2016
• Ref Project: EN ISO 20088-1:2016 - Determination of the resistance to cryogenic spillage of insulation materials - Part 1: Liquid phases (ISO 20088-1:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 20088-1:2017
01-januar-2017
8JRWDYOMDQMHREVWRMQRVWLL]RODFLMVNLKPDWHULDORYSULUD]OLWMXYNULRJHQHPSRGURþMX
GHO7HNRþDID]D,62
Determination of the resistance to cryogenic spillage of insulation materials - Part 1:
Liquid phases (ISO 20088-1:2016)
Bestimmung der Beständigkeit von Isoliermaterialien bei kryogenem Auslaufen - Teil 1:
Flüssigkeit (ISO 20088-1:2016)
Détermination de la résistance des matériaux d'isolation thermique suite à un
refroidissement cryogénique - Partie 1: Phase liquide (ISO 20088-1:2016)
Ta slovenski standard je istoveten z: EN ISO 20088-1:2016
ICS:
23.020.40 Proti mrazu odporne posode Cryogenic vessels
(kriogenske posode)
SIST EN ISO 20088-1:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 20088-1:2017

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SIST EN ISO 20088-1:2017


EN ISO 20088-1
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2016
EUROPÄISCHE NORM
ICS 75.200
English Version

Determination of the resistance to cryogenic spillage of
insulation materials - Part 1: Liquid phases (ISO 20088-
1:2016)
Détermination de la résistance des matériaux Bestimmung der Beständigkeit von Isoliermaterialien
d'isolation thermique suite à un refroidissement bei kryogenem Auslaufen - Teil 1: Flüssigkeit (ISO
cryogénique - Partie 1: Phase liquide (ISO 20088- 20088-1:2016)
1:2016)
This European Standard was approved by CEN on 5 August 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20088-1:2016 E
worldwide for CEN national Members.

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SIST EN ISO 20088-1:2017
EN ISO 20088-1:2016 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 20088-1:2017
EN ISO 20088-1:2016 (E)
European foreword
This document (EN ISO 20088-1:2016) 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 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 April 2017, and conflicting national standards shall be
withdrawn at the latest by April 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] 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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 20088-1:2016 has been approved by CEN as EN ISO 20088-1:2016 without any
modification.
3

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SIST EN ISO 20088-1:2017

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SIST EN ISO 20088-1:2017
INTERNATIONAL ISO
STANDARD 20088-1
First edition
2016-09-15
Determination of the resistance
to cryogenic spillage of insulation
materials —
Part 1:
Liquid phase
Détermination de la résistance des matériaux d’isolation thermique
suite à un refroidissement cryogénique —
Partie 1: Phase liquide
Reference number
ISO 20088-1:2016(E)
©
ISO 2016

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Test configurations . 2
4.1 General . 2
4.2 Sample holder . 2
5 Construction of the test items and substrates . 3
5.1 General . 3
5.2 Material . 3
5.3 Release tank . 3
5.4 Specimen support . 4
5.5 Sample holder . 6
5.6 Test method . 6
6 Cryogenic spillage protection materials . 7
6.1 General . 7
6.2 Wet applied coating systems . 7
6.3 Pre-formed system testing . 7
7 Instrumentation . 7
7.1 General . 7
7.2 Thermocouple location . 7
8 Test apparatus and conditions . 8
8.1 Injection point and position . 8
8.1.1 General. 8
8.1.2 Injection point position . 8
8.2 Test environment . 8
9 Test procedure . 9
10 Repeatability and reproducibility .10
11 Uncertainty of measurement .10
12 Test report .10
13 Practical applications of test results .11
13.1 General .11
13.2 Performance criteria .11
13.2.1 General.11
13.2.2 Coatings and spray-applied materials .11
13.2.3 Systems and assemblies .11
13.3 Factors affecting the validity of the test .12
13.3.1 General.12
13.3.2 Leakage of the release tank .12
13.3.3 Failure of thermocouples . .12
13.3.4 Loss of sample integrity/loss of containment .12
Annex A (normative) Methods of fixing thermocouples .13
Annex B (normative) Complete set-up .15
Annex C (normative) Thermocouple positioning inside the sample holder .17
Annex D (informative) Classification .19
© ISO 2016 – All rights reserved iii

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(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 on 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 the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 67, Materials, equipment and offshore structure
for petroleum, petrochemical and natural gas industries, Subcommittee SC 9, Liquefied natural gas
installations and equipment.
iv © ISO 2016 – All rights reserved

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

Introduction
The test described in the procedure in this document is one in which some of the properties of cryogenic
spillage protection materials can be determined. This test is designed to give an indication of how
cryogenic spillage protection materials will perform in a sudden exposure to cryogenic liquid.
The dimensions of the test specimen can be smaller than typical items of structure and plant and the
release of liquid can be substantially less than that which might occur in a credible event. However,
individual thermal and mechanical loads imparted to the cryogenic spillage protection materials, from
the cryogenic spillage defined in the procedure described in this document, have been shown to be
similar to those by large-scale cryogenic spillage.
Further parts of ISO 20088 are planned for future publication:
— Part 2 : Vapour phase;
— Part 3: High pressure jet release.
© ISO 2016 – All rights reserved v

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SIST EN ISO 20088-1:2017
INTERNATIONAL STANDARD ISO 20088-1:2016(E)
Determination of the resistance to cryogenic spillage of
insulation materials —
Part 1:
Liquid phase
CAUTION — The attention of all persons concerned with managing and carrying out cryogenic
spillage testing is drawn to the fact that liquid nitrogen testing can be hazardous and that there
is a danger of 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 shall
be given to relevant personnel.
1 Scope
This document describes a method for determining the resistance to liquid cryogenic spillage 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 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.
Future parts of the standard will cover vapour phase and jet 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.
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 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products
ISO 845, Cellular plastics and rubbers — Determination of apparent density
ISO 8301, Thermal insulation — Determination of steady-state thermal resistance and related properties —
Heat flow meter apparatus
ISO 16903, Petroleum and natural gas industries — Characteristics of LNG, influencing the design, and
material selection
ISO 22899-1, Determination of the resistance to jet fires of passive fire protection materials — Part 1:
General requirements
EN 10029, Tolerances on dimensions, shape and mass for hot rolled steel plates 3mm thick or above
© ISO 2016 – All rights reserved 1

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

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:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
floating liquid natural gas
FLNG
floating liquid natural gas facilities such as floating production storage and offloading (LNG-FPSO),
floating storage and re-gasification unit (LNG-FSRU)
3.2
cryogenic spill
unintended exposure to cryogenic liquid (CL) at −196°C
3.3
cryogenic spill protection
CSP
coating or cladding arrangement, or free-standing system which, in the event of a cryogenic spill, will
provide thermal protection to restrict the heat transfer rate of the substrate
3.4
limiting temperature
minimum temperature that the equipment, assembly or structure to be protected may be allowed to reach
3.5
release point
assembly from which the cryogenic fluid flows out
3.6
sponsor
person or organization who/which requests a test
3.7
specimen owner
person or company that holds/produces a material to test
4 Test configurations
4.1 General
There is one basic configuration under which the test can be conducted. This is a liquid configuration
where the material to be tested is rapidly exposed to liquid nitrogen in a pool at a temperature of −196 °C.
For reasons of clarity, flexible hoses used for fume extraction are not shown in Figures 1 to 4 below.
4.2 Sample holder
Samples will be tested in a sample holder with exact dimension as specified in ISO 22899-1:2007,
Figure 11.
2 © ISO 2016 – All rights reserved

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

5 Construction of the test items and substrates
5.1 General
The key items required for the test are:
— a liquid nitrogen injection point;
— a sample holder;
— the insulation part.
It is important to reduce vapour generation during the liquid nitrogen dumping. Flexible hoses are to be
used without forced ventilation.
5.2 Material
The material normally used is a 10 mm thick steel plate complying with ISO 630-1, Grade Fe 430. An all
welded construction shall be used and all welds shall be 5 mm fillet and continuous unless otherwise
stated. All dimensions are in millimetres and, unless otherwise stated, the following tolerances shall
be used:
— whole number ±1,0 mm;
— decimal to point, 0 mm ± 0,4 mm;
— decimal to point, 00 mm ± 0,2 mm;
— angles 0’ 30”;
— radius 0,4 mm.
5.3 Release tank
The liquid nitrogen is contained within a tank of a constant surface area either a square base of 750 mm
or circular base of 846 mm diameter. The release orifice shall be 100 mm in diameter.
When there is 250 l of stable non-bubbling liquid nitrogen within the tank, the test is ready to start.
The release tank shall be constructed of cryogenic resistant stainless steel and externally insulated for
personnel protection.
© ISO 2016 – All rights reserved 3

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

Detail D
Section view F-F
Scale 1:2
D
Scale 1:10
2
⌀12
10
E
Detail E
2
⌀12
Scale 1:2
Top view
Scale 1:10
⌀140
F F
⌀98
□750
⌀100
Figure 1 — Layout of a square release tank
Figure 2 — Layout of a cylindrical release tank
5.4 Specimen support
A square generic support will be used to hold the test sample. It shall be constructed with 10 mm carbon
steel. The centre of the table is hollow and will receive the sample holder as shown in Figure 3.
4 © ISO 2016 – All rights reserved
10
1000
1060
4
40 80

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

Figure 3 — Specimen support
The support walls and bottom panel are to be permanently insulated with rigid foam boards with a U
2
value of a minimum of 1,25 W/m ·K. An example material would be polyurethane (PU) foam boards
with the following characteristics:
3 3
— density: 130 kg/m ± 5 kg/m determined as in accordance with ISO 845;
© ISO 2016 – All rights reserved 5

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

— thickness: 30 mm ± 2 mm;
— thermal conductivity at 20 °C: 40 mW/m·K ± 4 mW/m·K determined as in accordance with ISO 8301.
5.5 Sample holder
All beams should be welded onto the bottom flat panel. Planarity of the bottom panel shall be in
accordance with EN 10029 as shown in Figure 4.
Figure 4 — Sample holder
The sample holder walls and top should be externally insulated with an insulation material as described
in 5.4. Rigid foam board walls should have a height of 1 m. The box shall be fully vapour tight.
The top cover shall have three holes: one for liquid nitrogen injection in the centre and two for fume
extraction (see Annex B).
5.6 Test method
When there is 250 l of liquid nitrogen within the tank, the test is ready to start. At the beginning of the
test the liquid nitrogen is quickly released towards the specimen of material under test from a height
of 1 000 mm. It is necessary to ensure a permanent 5 cm level of liquid nitrogen in both parts of the
basin in the sample holder for the duration of the test, liquid nitrogen is fed via the tank with suitable
cryogenic flexible hose for example with 6,35 mm diameter. The procedure for the test is detailed in
Clause 9.
6 © ISO 2016 – All rights reserved

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

6 Cryogenic spillage protection materials
6.1 General
CSP systems generally come in two forms: wet applied materials/coatings and preformed materials.
Preformed systems include boards, tiles, blankets, sandwich panels, etc. and are characterized by
systems that include joints and fixings. Pre-formed systems may be used in conjunction with wet
applied materials.
The application/installation methodology, including any necessary surface preparation, reinforcement,
thickness, top-coats, field joints, etc., is to be determined by the sponsor and/or specimen owner and
details provided for inclusion within test report.
6.2 Wet applied coating systems
For testing CSP systems/materials that are wet applied as coatings, the sample holder test specimen,
as shown in Figure 4, shall have material applied directly to all internal surfaces. The system thickness
should be uniform across the whole specimen.
6.3 Pre-formed system testing
When testing pre-formed systems, the system shall, as a minimum, be installed to cover the bottom of
the test assembly on to which the LN pool is formed, as shown in Figure 4.
2
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 joint located along line of thermocouples: 4, 7, 10 (or 3, 6, 9) as shown in Figure 5;
b) one joint located along line of thermocouples: 5, 6, 7, 8 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
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 s.
7.2 Thermocouple location
Thermocouples are positioned as shown in Figure 5.
© ISO 2016 – All rights reserved 7

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SIST EN ISO 20088-1:2017
ISO 20088-1:2016(E)

Dimensions in millimetres
Key
1 view from rear of specimen
2 thermocouple location
3 simulated corner or edge feature of “l” beam
Figure 5 — Thermocouple location at sample holder
8 Test apparatus and conditions
8.1 Injection point and position
8.1.1 General
Details of construction of the injection point, from which the liquid nitrogen is issued, are given in 5.3.
Liquid nitrogen should be a minimum of 98 % purity.
8.1.2 Injection point position
The injection point shall be positioned vertically above and normal to the bottom panel of the test
specimen. The tip of the injection point shall be located 1 000 mm ± 5 mm above the web of the CSP
material specimen. The centre of the injection point shall align with the centre of the test s
...

SLOVENSKI STANDARD
oSIST prEN ISO 20088-1:2015
01-december-2015
[Not translated]
Determination of the resistance to cryogenic spillage of insulation materials - Part 1:
Liquid phases (ISO/DIS 20088-1:2015)
Bestimmung der Beständigkeit von Isoliermaterialien bei kryogenem Auslaufen - Teil 1:
Flüssigkeit
Détermination de la résistance des matériaux d'isolation thermique suite à un
refroidissement cryogénique - Partie 1: Phase liquide (ISO/DIS 20088-1:2015)
Ta slovenski standard je istoveten z: prEN ISO 20088-1
ICS:
23.020.40 Proti mrazu odporne posode Cryogenic vessels
(kriogenske posode)
oSIST prEN ISO 20088-1:2015 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 20088-1:2015

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oSIST prEN ISO 20088-1:2015
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20088-1
ISO/TC 67 Secretariat: NEN
Voting begins on: Voting terminates on:
2015-10-22 2016-01-22
Determination of the resistance to cryogenic spillage of
insulation materials —
Part 1:
Liquid phase
Détermination de la résistance des matériaux d’isolation thermique suite à un refroidissement cryogénique
ICS: 75.200
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
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 20088-1:2015(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 2015

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oSIST prEN ISO 20088-1:2015
ISO/DIS 20088-1:2015(E)

Contents

Foreword . 5
Introduction. 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test configurations . 8
4.1 General . 8
4.2 Sample holder . 8
5 Construction of the test items and substrates . 8
5.1 General . 8
5.2 Material . 9
5.3 Injection set-up . 9
5.4 Specimen support . 10
5.5 Sample holder . 11
5.6 Test method . 12
6 Cryogenic spillage protection materials . 13
6.1 General . 13
6.2 Panel test specimens . 13
6.3 Wet applied materials . 13
7 Instrumentation . 13
7.1 General . 13
7.2 Thermocouple location . 13
COPYRIGHT PROTECTED DOCUMENT
8 Test apparatus and conditions . 14
© ISO 2015, Published in Switzerland
8.1 Injection point and position . 14
All rights reserved. Unless otherwise specified, 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
8.1.1 General . 14
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
8.1.2 Injection point position . 14
ISO copyright office
Ch. de Blandonnet 8 • CP 401
8.3 Test environment . 14
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
9 Test Procedure . 15
Fax [phone]
[e-mail]
10 Repeatability and reproducibility . 16
www.iso.org
11 Uncertainty of measurement . 16
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Contents

Foreword . 5
Introduction. 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test configurations . 8
4.1 General . 8
4.2 Sample holder . 8
5 Construction of the test items and substrates . 8
5.1 General . 8
5.2 Material . 9
5.3 Injection set-up . 9
5.4 Specimen support . 10
5.5 Sample holder . 11
5.6 Test method . 12
6 Cryogenic spillage protection materials . 13
6.1 General . 13
6.2 Panel test specimens . 13
6.3 Wet applied materials . 13
7 Instrumentation . 13
7.1 General . 13
7.2 Thermocouple location . 13
8 Test apparatus and conditions . 14
8.1 Injection point and position . 14
8.1.1 General . 14
8.1.2 Injection point position . 14
8.3 Test environment . 14
9 Test Procedure . 15
10 Repeatability and reproducibility . 16
11 Uncertainty of measurement . 16

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12 Test report . 16
13 Practical applications of test results . 17
13.1 General . 17
13.2 Performance criteria . 17
13.2.1 General. 17
13.2.2 Coatings and spray-applied materials . 17
13.2.3 Systems and assemblies . 18
13.3 Factors affecting the validity of the test . 18
13.3.1 General. 18
13.3.2 Leakage of the release tank . 18
13.3.3 Failure of thermocouples . 18
13.3.4 Loss of sample integrity/Loss of containment. 19
Annex A (normative) Methods of fixing thermocouples . 20
A.1 General . 20
A.2 “Quick Tip” attachment . 20
A.3 Capacitive discharge welding . 20
A.4 Drilling and peening . 20
A.5 Adhesive . 20
A.6 Central web thermocouples (structural steel work test specimen) . 20
Annex B (normative) Complete set-up . 22
Annex C (normative) Thermocouple positioning inside the sample holder . 24
Annex D (informative) Classification . 26
D.1 General . 26
D.2 Type of exposure . 26
D.3 Type of application . 26
D.4 Critical temperature drop . 26
D.5 Period of resistance . 26

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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. 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. 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO's adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
ISO 20088 Part 1 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries, JWG 13 Resistance to cryogenic
spillage.
Further parts of the ISO 20088 are planned for future publication:
Part 2 – Vapour phase;
Part 3 – High pressure jet release.

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Introduction
The test described in the procedure described in this part of ISO 20088 is one in which some of the
properties of cryogenic spillage protection materials can be determined. This test is designed to give an
indication of how cryogenic spillage protection materials will perform in a sudden exposure to
cryogenic liquid.
The dimensions of the test specimen can be smaller than typical items of structure and plant and the
release of liquid can be substantially less than that which might occur in a credible event. However,
individual thermal and mechanical loads imparted to the cryogenic spillage protection materials, from
the cryogenic spillage defined in the procedure described in this part of ISO 20088, have been shown to
be similar to those by large-scale cryogenic spillage.

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Determination of the resistance to cryogenic spillage of insulation
materials - Part 1: Liquid
CAUTION — the attention of all persons concerned with managing and carrying out cryogenic
spillage test is drawn to the fact that liquid nitrogen testing can be hazardous and that there is a
danger of 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 shall be given to relevant personnel.

1 Scope
This part of ISO 20088 describes a method for determining the resistance to liquid cryogenic spillage 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 nitrogen is used as the cryogenic medium since it has a lower boiling point than liquid natural
gas or liquid oxygen. Additionally, it can be safely used for experiment.
Future parts of the standard will cover vapour phase and high pressure jet 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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 630-1, Structural steels – Part 1: General technical delivery conditions for hot-rolled products.
ISO 845, Cellular plastics and rubbers -- Determination of apparent density
ISO 8301, Determination of steady-state thermal resistance and related properties -- Heat flow meter
apparatus.
ISO 22899-1, Determination of the resistance to jet fires of passive fire protection materials
Part 1: General Requirements.
EN 10029, Tolerances on dimensions, shape and mass for hot rolled steel plates 3mm thick or above.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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3.1
Floating Liquid Natural Gas
FLNG
floating liquid natural gas facilities such as LNG-FPSO (floating production storage and offloading), LNGFSRU
(floating storage and re-gasification unit)
3.2
Cryogenic spill
cryogenic spill in relation to this standard is defined to be the unintended exposure to cryogenic liquid (CL) at -
196°C
3.3
Cryogenic spill protection
CSP
coating or cladding arrangement, or free-standing system which, in the event of a cryogenic spill, will provide
thermal protection to restrict the heat transfer rate of the substrate
3.4
limiting temperature
minimum temperature that the equipment, assembly or structure to be protected may be allowed to reach
3.5
release point
assembly from which the cryogenic fluid flows out
3.6
sponsor
person or organization who/which requests a test
3.7
specimen owner
person or company that holds/produces a material to test
4 Test configurations
4.1 General
There is one basic configuration under which the test can be conducted. This is a liquid configuration
where the material to be tested is rapidly exposed to liquid nitrogen in a pool at a temperature of
-196°C. For reasons of clarity, flexible hoses used for fume extraction are not shown in figures 1 to 4
below.
4.2 Sample holder
Samples will be tested in a sample holder with exact dimension as specified in ISO 22899-1.
5 Construction of the test items and substrates
5.1 General
The key items required for the test are
 a liquid nitrogen injection point,
 a sample holder;
 the insulation part.
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It is important to reduce vapour generation during the liquid nitrogen dumping. Flexible hoses are to be used
without forced ventilation.

5.2 Material
The material normally used is a 10 mm thick steel plate complying with ISO 630-1, Grade Fe 430. An all
welded construction shall be used and all welds shall be 5 mm fillet and continuous unless otherwise
stated. 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”;
 radii 0,4 mm.

5.3 Injection set-up
2
The liquid nitrogen is contained within a tank of a constant surface area of 0,5625m either a square
base of 750mm or circular base of 846mm diameter. The release orifice shall be 100 mm in diameter.
When there is 250 l of non-boiling liquid nitrogen within the tank, the test is ready to start. The
injection tank shall be constructed of cryogenic resistant stainless steel and insulated with flexible
aerogel blanket if necessary.
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Figure 1 — Layout of a square release tank


Figure 2 — Layout of a cylindrical release tank

5.4 Specimen support
A square generic support will be used to hold the test sample. It shall be constructed with 10mm carbon
steel. The centre of the table is hollow and will receive the sample holder as shown in Figure 3.
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Figure 3 — Specimen support

The support walls and bottom panel are to be permanently insulated with rigid foam boards with a U
2.
value of a minimum of 1,25W/m K. An example material would be polyurethane (PU) foam boards
with the following characteristics:
 density : 130 ± 5 kg/m3 as specified in ISO 845;
 thickness : 30 ± 2mm;
 thermal conductivity at 20 °C : 40 ± 4 mW/m.K as specified in ISO 8301.

5.5 Sample holder
All beams should be welded onto the bottom flat panel. Planarity of the bottom panel shall be in
accordance with EN 10029.
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Figure 4 — Sample holder

The sample holder walls and top should be insulated with an insulation material as described in 5.4.
Rigid foam board walls should have a height of 1 m. The box shall be fully vapour tight.
The top cover shall have three holes: one for liquid nitrogen injection in the centre and two for fume
extraction (see Annex B).

5.6 Test method
When there is 250 l of non-boiling liquid nitrogen within the tank, the test is ready to start. At the
beginning of the test the liquid nitrogen is quickly released towards the specimen of material under test
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from a height of 1000 mm. If it is necessary to ensure a permanent 5 cm level of liquid nitrogen in both
parts of the ba
...