SIST EN ISO 20783-2:2004

SLOVENSKI STANDARD
SIST EN ISO 20783-2:2004
01-julij-2004
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Petroleum and related products - Determination of emulsion stability of fire-resistant
fluids - Part 2: Fluids in category HFB (ISO 20783-2:2003)
Mineralölerzeugnisse und verwandte Produkte - Bestimmung der Emulsionsstabilität von
schwerentflammbaren Druckflüssigkeiten - Teil 2: HFB-Flüssigkeiten (ISO 20783-2:2003)
Pétrole et produits connexes - Détermination de la stabilité d'émulsions de fluides
difficilement inflammables - Partie 2: Fluides de catégorie HFB (ISO 20783-2:2003)
Ta slovenski standard je istoveten z: EN ISO 20783-2:2003
ICS:
75.080 Naftni proizvodi na splošno Petroleum products in
general
SIST EN ISO 20783-2:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 20783-2:2004

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SIST EN ISO 20783-2:2004
EUROPEAN STANDARD
EN ISO 20783-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2003
ICS 75.120
English version
Petroleum and related products - Determination of emulsion
stability of fire-resistant fluids - Part 2: Fluids in category HFB
(ISO 20783-2:2003)
Pétrole et produits connexes - Détermination de la stabilité Mineralölerzeugnisse und verwandte Produkte -
d'émulsions de fluides difficilement inflammables - Partie 2: Bestimmung der Emulsionsstabilität von schwer
Fluides de catégorie HFB (ISO 20783-2:2003) entflammbaren Flüssigkeiten - Teil 2: HFB-Flüssigkeiten
(ISO 20783-2:2003)
This European Standard was approved by CEN on 2 December 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20783-2:2003 E
worldwide for CEN national Members.

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SIST EN ISO 20783-2:2004
EN ISO 20783-2:2003 (E)
CORRECTED  2004-03-03
Foreword
This document (EN ISO 20783-2:2003) has been prepared by Technical Committee ISO/TC 28
"Petroleum products and lubricants" in collaboration with Technical Committee CEN/TC 19
"Petroleum products, lubricants and related products", the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by June 2004, and conflicting national
standards shall be withdrawn at the latest by June 2004.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 20783-2:2003 has been approved by CEN as EN ISO 20783-2:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
2

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SIST EN ISO 20783-2:2004
EN ISO 20783-2:2003 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN/HD Year
ISO 3170 1988 Petroleum liquids - Manual sampling EN ISO 3170 1998
ISO 3696 1987 Water for analytical laboratory use - EN ISO 3696 1995
Specification and test methods
3

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SIST EN ISO 20783-2:2004

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SIST EN ISO 20783-2:2004


INTERNATIONAL ISO
STANDARD 20783-2
First edition
2003-12-15


Petroleum and related products —
Determination of emulsion stability of
fire-resistant fluids —
Part 2:
Fluids in category HFB
Pétrole et produits connexes — Détermination de la stabilité d'émulsion
de fluides difficilement inflammables —
Partie 2: Fluides de catégorie HFB





Reference number
ISO 20783-2:2003(E)
©
ISO 2003

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(E)
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ii © ISO 2003 – All rights reserved

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references . 1
3 Method A — Determination of stability of HFB fluids at ambient temperature . 2
3.1 Principle . 2
3.2 Reagents . 2
3.3 Apparatus. 2
3.4 Samples. 2
3.5 Procedure. 4
3.6 Calculation. 5
3.7 Precision . 6
4 Method B — Determination of stability of HFB fluids at medium temperature . 7
4.1 Principle . 7
4.2 Apparatus. 7
4.3 Samples. 7
4.4 Procedure. 7
4.5 Expression of results. 8
4.6 Precision . 8
5 Method C — Determination of stability of HFB.LT fluids at low temperature. 9
5.1 Principle . 9
5.2 Reagent . 9
5.3 Apparatus. 9
5.4 Samples. 9
5.5 Procedure. 9
5.6 Calculation. 10
5.7 Precision . 11
6 Test report. 11
Bibliography . 12

© ISO 2003 – All rights reserved iii

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 20783-2 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants.
ISO 20783 consists of the following parts, under the general title Petroleum and related products —
Determination of emulsion stability of fire-resistant fluids:
— Part 1: Fluids in category HFAE
— Part 2: Fluids in category HFB
iv © ISO 2003 – All rights reserved

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SIST EN ISO 20783-2:2004
INTERNATIONAL STANDARD ISO 20783-2:2003(E)

Petroleum and related products — Determination of emulsion
stability of fire-resistant fluids —
Part 2:
Fluids in category HFB
WARNING — The use of this part of ISO 20783 may involve hazardous materials, operations and
equipment. This part of ISO 20783 does not purport to address all of the safety problems associated
with its use. It is the responsibility of the user of this part of ISO 20783 to establish appropriate safety
and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This part of ISO 20783 specifies three test methods to assess the stability of emulsions within the category
[5]
HFB, as defined in ISO 6743-4 .
Method A describes a method for the determination of stability during storage at ambient temperature
1)
[(20 ± 2) °C] and is applicable to HFB and HFB.LT fluids.
Method B describes a method for the determination of stability during storage at medium temperature
1)
[(70 ± 2) °C] and is again applicable to HFB and HFB.LT fluids.
Method C describes a method for the determination of stability during storage at low temperature
1)
[(−10 ± 2) °C] and is applicable only to HFB.LT fluids.
2 Normative references
The following referenced documents are indispensable for the application 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 648:1977, Laboratory glassware — One-mark pipettes
2)
ISO 3170:— , Petroleum liquids — Manual sampling
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
ISO 3733:1999, Petroleum products and bituminous materials — Determination of water — Distillation method

1) LT is the designation for low temperature applications.
2) To be published. (Revision of ISO 3170:1988)
© ISO 2003 – All rights reserved 1

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(E)
3 Method A — Determination of stability of HFB fluids at ambient temperature
3.1 Principle
A graduated measuring cylinder is filled with 450 ml of emulsion above a 50 ml layer of water and is stored for
1 000 h at ambient temperature. At the end of this time, 50-ml sub-samples are pipetted from two defined
levels in the upper and lower regions of the emulsion column. The water contents of these test portions are
compared with the measured initial water content. Measurements of the surface oil layer volume and the
volume of accumulated free water are also made.
3.2 Reagents
[2]
3.2.1 Water-free petroleum spirit, (see ISO 1998-1:1998 , 1.20.146) with a boiling range of 90 °C to
160 °C.
3.2.2 Water, meeting the requirements of Grade 3 of ISO 3696:1987.
3.2.3 Reagents for distillation procedure, as specified in ISO 3733, for the determination of water.
3.3 Apparatus
3.3.1 Graduated measuring cylinders, of 500 ml capacity, with a scale length from the 50 ml to 500 ml
graduations of (250 ± 25) mm and an overall height of approximately 390 mm.
[4]
Cylinders conforming to ISO 4788 are suitable.
3.3.2 Pipettes, of 50 ml capacity, conforming to ISO 648.
3.3.3 Polyethylene film, approximately 0,05 mm thick.
3.3.4 Round-bottomed flasks, of 500 ml capacity, used as distillation vessels for the determination of
water in accordance with ISO 3733.
3.3.5 Sampling jig, consisting of a retort stand, clamps and set square as shown in Figure 1.
3.3.6 Stop clock.
3.3.7 Wash bottle.
3.3.8 Apparatus for distillation procedure, as specified in ISO 3733, for the determination of water.
3.4 Samples
3.4.1 Unless otherwise specified, samples of fluid shall be obtained using the procedures specified in
ISO 3170.
3.4.2 A fluid sample of no less than 1,5 l in volume shall be supplied for the test. Care shall be taken to
ensure that the sample is representative of the bulk.
2 © ISO 2003 – All rights reserved

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(E)
Dimensions in millimetres

Key
1 retort stand
2 Stop C
3 Clamp B
4 500 ml measuring cylinder
5 set square for external alignment of pipette
6 Clamp A
7 50 ml pipette in sampling position
a
To vacuum pump
Figure 1 — Sampling apparatus
© ISO 2003 – All rights reserved 3

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SIST EN ISO 20783-2:2004
ISO 20783-2:2003(E)
3.5 Procedure
3.5.1 General
Mix the sample thoroughly by agitation in a vessel having a capacity that is substantially greater than the
sample size.
3.5.2 Initial water content of the emulsion
Take two sub-samples of 50 ml each from the sample (3.4.2) using a pipette (3.3.2). Drain each 50 ml test
portion from the pipette into a clean, dry 500 ml round-bottomed flask (3.3.4). Rinse the residual fluid from the
pipette into the flask using several charges of petroleum spirit (3.2.1) from a wash bottle (3.3.7). A total volume
of approximately 100 ml of petroleum spirit shall be used for this operation. Drain the pipette thoroughly to
ensure that all of the sub-sample is transferred to the round-bottomed flask. Use the sub-sample as the test
portion specified in ISO 3733 and subject each of them to the distillation procedure given in ISO 3733 to obtain
two determinations of the initial percentage water content (volume fraction), ϕ, of the emulsion to the nearest
i
0,2 %.
Some emulsions contain water-soluble liquid, which distils over during the determination of the water content
(volume fraction, %) by the distillation method. When such water-soluble liquid is present, the result of the
water content determination by the distillation method is termed the apparent water content. Determine the
apparent water content where appropriate.
3.5.3 Preparation of te
...