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12065 : 1998
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Installations and equipment |
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for liquefied natural gas Ð |
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Testing of foam concentrates |
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designed for generation of |
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medium and high expansion |
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foam and of extinguishing |
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powders used on liquefied |
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natural gas fires |
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The European Standard EN 12065 : 1997 has the status of a |
British Standard |
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ICS 13.220.10; 75.180.01 |
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NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
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BS EN 12065 : 1998

National foreword
This British Standard is the English language version of EN 12065 : 1997.
The UK participation in its preparation was entrusted to Technical Committee
GSE/38, Installation and equiment for LNG, which has the responsibility to:

± aid enquirers to understand the text;

± present to the responsible European committee any enquiries on the
interpretation, or proposals for change, and keep the UK interests informed;
± monitor related international and European developments and promulgate
them in the UK.

A list of organizations represented on this committee can be obtained on request to

its secretary.
Cross-references
The British Standards which implement international or European publications
referred to in this document may be found in the BSI Standards Catalogue under the
section entitled `International Standards Correspondence Index', or by using the
`Find' facility of the BSI Standards Electronic Catalogue.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

Summary of pages
This document comprises a front cover, an inside front cover, the EN title page,
pages 2 to 18, an inside back cover and a back cover.

This British Standard, having Amendments issued since publication

been prepared under the
direction of the Engineering Amd. No. Date Text affected
Sector Board, was published
under the authority of the
Standards Board and comes into
effect on 15 February 1998

 BSI 1998

ISBN 0 580 28946 X

EUROPEAN STANDARD EN 12065
NORME EUROPEÂENNE
EUROPAÈISCHE NORM September 1997

ICS 13.220.10; 75.180.01

Descriptors: Gas installation, liquefied natural gas, fire, fire protection, extinguishing agents, foam extinguishers,
dry powder extinguishers, operating requirements, tests, test equipment, effectiveness, accountancy, acceptability

English version

Installations and equipment for liquefied natural gas Ð Testing of

foam concentrates designed for generation of medium and high
expansion foam and of extinguishing powders used on liquefied
natural gas fires

Installations et eÂquipements relatifs au gaz naturel Anlagen und AusruÈstung fuÈr FluÈssigerdgas Ð
liqueÂfie РEssais d'eÂmulseurs destineÂs aÁ la EignungspruÈfung von Schaummitteln fuÈr das
production de mousse haut et moyen foisonnement AufschaÈumen von Mittelschaum und Hochschaum
et de poudres extinctrices utiliseÂs sur feux de gaz sowie LoÈschpulvern zur BekaÈmpfung von
naturel liqueÂfie FluÈssigerdgasbraÈnden (LNG-BraÈnden)

This European Standard was approved by CEN on 22 September 1997.

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 Central Secretariat 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 Central Secretariat 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, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom.

CEN
European Committee for Standardization
Comite EuropeÂen de Normalisation
EuropaÈisches Komitee fuÈr Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
Members.
Ref. No. EN 12065 : 1997 E
Page 2
EN 12065 : 1997

Foreword
8 Description of the equipment required
This European Standard has been prepared by
to test the compatibility between foam
Technical Committee CEN/TC 282, Installation and
and extinguishing powder 6
equipment for LNG, the secretariat of which is held by
AFNOR. 8.1 Components of the foam production
This European Standard shall be given the status of a unit 6
national standard, either by publication of an identical 8.2 Equipment required for the application
text or by endorsement, at the latest by March 1998, of extinguishing powder 6
and conflicting national standards shall be withdrawn 8.3 Special equipment required for the test 6
at the latest by March 1998.
8.4 Other equipment required for the test 6
According to the CEN/CENELEC Internal Regulations,
the national standards organizations of the following 9 The test for compatibility between
countries are bound to implement this European foam and extinguishing powder 7
Standard: Austria, Belgium, Czech Republic, Denmark, 9.1 General requirements for performing
Finland, France, Germany, Greece, Iceland, Ireland, the test 7
Italy, Luxembourg, Netherlands, Norway, Portugal,
9.2 Test procedure 7
Spain, Sweden, Switzerland and the United Kingdom.
9.3 Criterion of acceptance of
extinguishing powder 7
10 The test report for the efficency of the
Contents extinguishing powder on an LNG fire 7
Page 10.1 Test report 7
Foreword 2 10.2 Extinction test on a free fire 7
1 Scope 3 10.3 Test for compatibility between foam
and extinguishing powder 7
2 Normative references 3
Annexes
3 Definitions 3
A (informative) General
4 Description of equipment required for recommendations on the design of the
the foam concentrate tests 4 foam generating equipment required
4.1 Components of the foam production for testing 8
unit 4 B (informative) Measuring equipment
4.2 Special equipment required to used to quantify foam production 11
determine the foam expansion ratio 4 C (normative) Measuring equipment
4.3 Special equipment required to used to determine fire conditions 14
determine the efficiency of the foam D (normative) Method of calculating the
on LNG fires 4 parameters used to determine the
4.4 Other equipment required for the foam efficiency of the foam concentrate 16
concentrate tests 4 E (normative) Special test rig required to
5 Foam concentrate tests 4 test the compatibility between foam
5.1 Measurement of foam expansion ratio 4 and extinguishing powder 18
5.2 Evaluation of the efficiency of the
foam on LNG fires 5
6 The foam concentrate test report 5
7 Evaluation of the efficiency of an
extinguishing powder on a free LNG
fire 6

 BSI 1998
 Page 3
EN 12065 : 1997

1 Scope 3 Definitions
This European Standard specifies the tests to be For the purposes of this standard, the following
carried out in order to assess the suitability of foam definitions, and those given in EN 1160, apply:
concentrates used to produce medium expansion foam NOTE. Other definitions will be given in the document
(made from foam concentrates conforming to WI 00191043 (Fixed fire fighting systems Ð Foam systems Ð
prEN 1568-1) or high expansion foam (made from foam Part 1: Components), still in preparation.
concentrates conforming to prEN 1568-2) and fire 3.1 liquefied natural gas (LNG)
extinguishing powder conforming to EN 615 when used
See EN 1160.
alone or in combination on liquefied natural gas (LNG)
fires. 3.2 solution
This standard does not specify the general Liquid formed by mixing foam concentrate and water.
requirements for foam concentrates given in
prEN 1568-1 and prEN 1568-2 or fire extinguishing 3.3 application rate of solution
powder given in EN 615. The flow rate of application of the solution, per
This standard does not apply to foam concentrates surface unit area on fire, generally expressed
used to produce low expansion foam (made from foam in l/(min´m2).
concentrates conforming to prEN 1568-3) which are 3.4 foam concentrate ratio
not used on LNG installations. Ratio generally expressed in percentage of the foam
concentrate volume over the solution volume.
2 Normative references 3.5 proportioner
This European Standard incorporates, by dated or A device installed on a pipe to ensure mixing of water
undated reference, provisions from other publications. with foam concentrate in such a way that the resulting
These normative references are cited at the solution presents the desired foam concentrate ratio.
appropriate places in the text and the publications are
listed hereafter. For dated references, subsequent 3.6 foam expansion ratio
amendments to or revisions of any of these The ratio between the resulting volume of foam and
publications apply to this European Standard only the volume of solution used.
when incorporated in it by amendment or revision. For
undated references the latest edition of the publication 3.7 initial radiation
referred to applies. The radiation of the LNG fire not covered with foam,
burning in free combustion.
EN 615 Fire protection Ð Fire extinguishing
media Ð Specification for powders 3.8 reduced radiation
(other than class D powders) The radiation of an LNG fire covered with a layer of
foam.
EN 1160 Installations and equipment for
NOTE. The value of this radiation varies as a function of the
liquefied natural gas Ð General thickness of the foam.
characteristics of liquefied natural
gas 3.9 containment of fire
prEN 1568-1 Fire extinguishing media Ð Foam A fire is contained when its radiation has been
concentrates Ð Part 1: Specification changed from the mean initial radiation to a mean
for medium expansion foam reduced radiation that is 10 % of the mean initial
concentrates for surface application to radiation under the effect of the foam discharged.
water-immiscible liquids 3.10 control of fire
prEN 1568-2 Fire extinguishing media Ð Foam A fire is controlled when its mean reduced radiation is
concentrates Ð Part 2: Specification between 10 % and 25 % of the mean initial radiation
for high expansion foam concentrates between two additions of foam.
for surface application to
water-immiscible liquids 3.11 free LNG fire
prEN 1866 Mobile fire extinguishers A fire where LNG is in free combustion, not covered
by any foam.
3.12 mitigated LNG fire
A fire where the combustion of LNG is reduced by
foam coverage.

 BSI 1998
Page 4
EN 12065 : 1997

4 Description of equipment required for 4.3 Special equipment required to determine the
efficiency of the foam on LNG fires
the foam concentrate tests
4.1 Components of the foam production unit 4.3.1 Impounding area
The foam discharge on an ignited LNG pool is The fire test shall be performed in a circular
obtained by injecting the solution into a foam impounding area, with a surface area at least equal
generator. to 50 m2 and a height of 1,5 m. When necessary, the
4.1.1 Foam generator bottom of the impounding area shall be lined with
insulating concrete in order to reduce LNG evaporation
The foam generator used for these tests shall be of the
same type as the equipment installed on industrial during impounding area filling.
sites. The output rate at its rated operating pressure The impounding area shall be fabricated from materials
shall be such that the application rate of the solution listed in EN 1160.
during testing is between 3 l/(m2´min) and 4.3.2 Measuring equipment
10 l/(m2´min).
The following measuring devices shall be used to
4.1.2 Equipment used to supply the solution to determine the condition of the fire:
the foam generator
a) eight thermocouples arranged on a vertical mast
The foam concentrate ratio of the solution selected for
positioned at the centre of the impounding area;
testing shall be defined either by the foam concentrate
supplier or the industrial user, or by mutual agreement b) four radiometers positioned crosswind on both
between both parties. sides of the impounding area, at a distance from the
centre of the impounding area equal to twice the
The solution may be supplied to the foam generator in
diameter of the impounding area.
two different manners:
a) the solution shall be prepared in advance by The values shall be recorded throughout the entire
mixing in a container (open or closed tank or LNG combustion.
equivalent) the water volume required for testing Annex C specifies the measuring equipment to be used
with the quantity of foam concentrate necessary to to determine the fire condition.
obtain the desired foam concentrate ratio. The 4.4 Other equipment required for the foam
solution shall be used in a time limit specified by the concentrate tests
foam concentrate supplier. The prepared solution
shall then be transferred to the foam generator via a Regardless of the test conducted, the following data
pump and transfer pipes; relative to the test site shall be measured and recorded
b) water shall be supplied to a proportioner by a with appropriate equipment:
pump; the resulting solution shall then be transferred a) air temperature;
to the foam generator via transfer pipes. b) water temperature;
Annex A provides the general recommendations on the c) wind speed and direction;
design of the foam generating facilities required for d) air humidity.
testing. In addition, video equipment shall be used to record all
4.1.3 Measurements to be carried out to quantify the tests carried out.
the foam production
In order to quantify the foam production during
testing, the following values shall be measured and 5 Foam concentrate tests
recorded: 5.1 Measurement of foam expansion ratio
a) the flow rate of the solution;
5.1.1 General requirements for performing the
b) the solution pressure at the generator inlet;
test
c) the quantity of foam concentrate used;
The quality of the water used for testing purposes shall
d) the quantity of water used;
be defined either by the supplier of the foam
e) the temperature of the water used. concentrate or the industrial user, or by mutual
Annex B provides information on the means and agreement between both parties.
methods that may be used to measure the above
parameters. The foam expansion ratio measuring test shall be
performed only if the following conditions are met:
4.2 Special equipment required to determine the
a) zero precipitation;
foam expansion ratio
The foam expansion ratio shall be determined by b) when comparing different foam concentrates, the
releasing the produced foam into an impounding area air and water temperatures between the different
with a surface area at least equal to 70 m2 and a height tests shall be within 15 ÊC for each fluid;
at least equal to 1,2 m. In any case, the impounding c) the mean wind speed is under 4 m/s, and wind
area filling time shall be greater than 45 s. The gusts are not exceeding 6 m/s;
impounding area shall be calibrated to measure its d) the transfer pipes used to supply the foam
volume with a precision at least equal to 1 %. generator are filled with solution.

 BSI 1998
 Page 5
EN 12065 : 1997

5.1.2 Test procedure 5.2.2 Test procedure

The test shall be performed in accordance with the The test shall be performed in accordance with the
following procedure: following procedure:
a) start up of the foam generator and discharge the a) fill the impounding area with LNG;
resulting foam outside the test impounding area until b) ignite the LNG;
nominal operating conditions of the foam generating c) leave as a free LNG fire for 45 s, obtaining the
unit are achieved; mean initial radiation by averaging the radiation
b) continuously discharge the foam into the test values measured by the four radiometers positioned
impounding area; crosswind during the last 30 s;
c) stop the discharge of the foam once the test d) start the foam generator to operate under nominal
impounding area is filled. operating conditions;
e) stop the foam discharge as soon as the mean
5.1.3 Parameters derived from the measurements
reduced radiation measured over a period of 10 s is
The foam expansion ratio, f, shall be calculated as equal to or lower than 10 % of the mean initial
follows: radiation;
V f) add foam when the mean reduced radiation
f= (1)
Vsol measured over a period of 10 s reaches 25 % of the
where: mean initial radiation;
g) stop the foam discharge as soon as the mean
V is the volume of the impounding area that is reduced radiation measured over a period of 10 s is
filled with foam; equal to or lower than 10 % of the mean initial
Vsol is the volume of solution required to produce a radiation;
volume, V, of foam. h) repeat the last two steps (f and g) at least twice;
i) monitor the foam destruction until the end of
If a proportioner is used, the foam concentrate ratio, combustion.
t , shall be calculated as follows:
5.2.3 Parameters derived from measurements
V
t = em (2) The efficiency of each foam concentrate shall be
Vsol determined by calculating the following parameters, in
where: accordance with annex D:
a) the time for LNG fire containment;
Vem is the volume of the foam concentrate.
b) the volume of foam concentrate required to
contain the LNG fire;
5.2 Evaluation of the efficiency of the foam on
LNG fires c) the height of foam required for containment of
fire;
5.2.1 General requirements for performing the d) the foam concentrate consumption required to
test control the LNG fire;
The quality of the water used for testing purposes shall e) the rate of foam destruction.
be defined either by the supplier of the foam
concentrate or the industrial user, or by mutual
agreement between both parties. 6 The foam concentrate test report
The test shall be regarded as valid only if the following The measurement of the foam expansion ratio and the
conditions are met: evaluation of the foam efficiency on LNG fires shall be
a) the methane content of the LNG discharged into recorded in a test report containing the following
the impounding area is greater than 85 %; information:
a) the date and time of the tests;
b) the methane content of the LNG at the end of the
impounding area filling is greater than 60 %; b) data concerning the test site (location, address);
c) the name of the testing company;
c) the LNG level in the impounding area is at least
equal to 0,15 m within 2 min before the start of the d) the technical data sheet for the foam concentrate
ignition; under test, specifying the physico-chemical
parameters as defined by prEN 1568-1 and
d) zero precipitation; prEN 1568-2;
e) the mean wind speed is under 4 m/s, and wind e) the performance specification of the foam
gusts are not exceeding 6 m/s; generator (flow rate and rated operating pressure);
f) the foam generator is positioned upwind of the f) the dimensions and volume of the impounding
impounding area; areas used in the foam expansion ratio measuring
g) the transfer pipes used to supply the foam test and in the foam efficiency evaluation measuring
generator are filled with solution. test;

 BSI 1998
Page 6
EN 12065 : 1997

g) the quality of the water used (salt, brackish or 7 Evaluation of the efficiency of an
fresh water);
extinguishing powder on a free LNG fire
h) technical data sheets of the measuring and
The efficiency of an extinguishing powder on a free
recording devices;
LNG fire shall be evaluated in accordance with
i) the conditions of the foam expansion ratio EN 615, substituting LNG for the class B combustible
measuring test as follows: in the fire test. Portable fire extinguishers with a rated
1) ambient temperature; load equal to 6 kg or 9 kg shall be used for testing
2) wind speed and direction; purposes.
3) air humidity;
4) water temperature; 8 Description of the equipment required
5) flow rate and pressure of the foam generator; to test the compatibility between foam
6) foam concentrate ratio; and extinguishing powder
j) the results from the foam expansion ratio 8.1 Components of the foam production unit
measuring test as follows: The equipment used shall be as in 4.1.
1) time for filling the impounding area;
8.2 Equipment required for the application of
2) volume of solution; extinguishing powder
3) foam expansion ratio; The equipment used for these tests shall be of the
k) the conditions of the evaluation of the foam same type as the equipment used on industrial sites.
efficiency on LNG fires as follows: Each nozzle shall have a flow rate between 2,5 kg/s
1) the LNG level in the impounding area at and 3,3 kg/s and shall be capable of discharging a load
ignition time; of extinguishing powder equal to 100 kg.
2) methane content of the LNG measured at the 8.3 Special equipment required for the test
end of the impounding area;
The impounding area used to perform this test shall be
3) description of the methods used to determine circular shaped, with a base area equal to (50 ± 5) m2
the LNG level and methane content at the end of and a height equal to 1,5 m. When necessary, the base
impounding area filling; of the impounding area shall be lined with insulating
4) ambient temperature; concrete in order to reduce LNG evaporation during
5) wind speed and direction; the filling of the impounding area.
6) air humidity; Annex E specifies the equipment to be used.
7) temperature of the water used to produce 8.4 Other equipment required for the test
foam; The following data relative to the test site shall be
8) flow rate and pressure of the foam generator measured and recorded with appropriate equipment:
during the different discharges and additions of a) ambient temperature;
foam;
b) wind speed and direction;
9) orientation of the foam generator in relation to
the wind; c) air humidity.
10) actual position of radiometers in relation to In addition, video equipment shall be used to record all
the wind; the tests carried out.
l) the results from the evaluation of the foam
efficiency on LNG fires as follows:
1) initial radiation from the fire;
2) curves of heat radiation as a function of time as
measured by the four radiometers, accompanied
by comments detailing the beginning and end of
the foam discharge periods;
3) time for LNG fire containment;
4) volume of the foam concentrate required to
contain the LNG fire;
5) height of foam required for fire containment;
6) foam concentrate consumption required to
control the LNG fire;
7) rate of foam destruction.

 BSI 1998
 Page 7
EN 12065 : 1997

9 The test for compatibility between 10.2 Extinction test on a free fire
foam and extinguishing powder The following information shall be recorded:
9.1 General requirements for performing the a) the date and time of the extinction attempts;
test b) data concerning the test site (location, address);
The test for compatibility between foam and c) the name of the testing company;
extinguishing powder shall be performed only if the d) the technical data sheet for the portable fire
following conditions are met for each extinction extinguishers in accordance with prEN 1866;
attempt:
e) the technical data sheet for the extinguishing
a) the methane content of the LNG discharged into powder under test in accordance with EN 615;
the impounding area is greater than 85 %;
f) the dimensions of the impounding area, surface
b) the LNG level in the impounding area is at least
area of the pool and the LNG height before ignition;
equal to 0,15 m obtained within a maximum time
of 1 h following start of filling the impounding area; g) the number of successful extinctions and number
c) zero precipitation; of extinction attempts;
d) the mean wind speed is under 4 m/s, and wind h) the quantity of powder used for each successful
gusts are not exceeding 6 m/s; extinction.
e) the foam generator is positioned upwind of the 10.3 Test for compatibility between foam and
impounding area; extinguishing powder
f) the transfer pipes used to supply foam generator The following information shall be recorded:
are filled with solution;
a) the date and time of extinction attempts;
g) fire-extinguishing equipment is properly installed
prior to LNG ignition, so that two operators can be b) data concerning the test site (location, address);
positioned crosswind on both sides of the c) the name of testing company;
impounding area at the beginning of the extinction d) the technical data sheet for the foam generator;
attempt; NOTE. CEN/TC 191 is preparing a document on this subject
h) the handling of the extinguisher shall be (00191043 Fixed fire fighting systems Ð Foam systems Ð
conducted in accordance with the recognized codes Part 1 : Components).
of practice. e) the technical data sheet for the mobile fire
9.2 Test procedure extinguishers in accordance with prEN 1866;
Each extinction attempt shall be performed in f) the technical data sheet for the foam concentrate
accordance with the following procedure: under test used for foam production specifying the
a) fill the impounding area with LNG; physico-chemical parameters as defined in
b) ignite the LNG; prEN 1568-1 and prEN 1568-2;
c) leave as a free LNG fire for 45 s; g) the technical data sheet for the extinguishing
d) start the foam generator to operate under nominal powder under test in accordance with EN 615;
operating conditions; h) the technical data sheets of the measuring and
e) stop the foam discharge as soon as the recording devices used;
impounding area is filled; i) the conditions of the foam discharge over the LNG
f) extinguish the mitigated LNG fire using two fire as follows:
operators working simultaneously. 1) LNG level in the bund at time of ignition;
9.3 Criterion of acceptance of extinguishing 2) methane content of the LNG discharged into
powder the impounding area;
The compatibility between foam and extinguishing 3) ambient temperature;
powder shall be assessed on the basis of five
4) wind speed and direction;
successful extinctions out of eight attempts. No further
testing is required as soon as five successful 5) air humidity;
extinctions are achieved. 6) temperature of the water used for foam
The quantity of powder used during each successful production;
extinction shall be measured. 7) flow rate and pressure of the foam generator;
8) orientation of the foam generator and
10 The test report for the efficency of extinguishers in relation to the wind;
the extinguishing powder on an LNG fire j) the number of successful extinctions and number
10.1 Test report of extinction attempts;
The results from the free fire test and from the test for k) the quantity of powder used for each successful
compatibility between foam and extinguishing powder extinction.
shall be recorded in a test report.

 BSI 1998
Page 8
EN 12065 : 1997

Annex A (informative) e) the pipes and fire hoses connected to the foam
generator are filled with solution;
General recommendations on the design f) the foam expansion ratio measuring test is started.
of the foam generating equipment NOTE. The foam generator should be placed on a rotating table,
required for testing thereby enabling the generated foam to be discharged outside the
impounding area at the beginning of the test. Once the foam
A.1 General remarks generator operates under nominal operating conditions, the
rotating table can then be oriented to discharge the foam into the
Foam concentrate tests may be carried out on request test impounding area.
from:
a) the foam concentrate supplier who prescribes the A.3 Design of a foam generating system with
foam concentrate ratio; preparation of solution using a proportioner
b) an industrial user such as an engineering firm or A.3.1 Overall design
operator wishing to assess the performance of the A diagram of the proposed test rig is shown in
foam concentrate related to a given piece of figure A.2. The system consists of the following:
equipment. In this case, the foam concentrate ratio a) a water supply, either a tank or a tanker from
selected for the test should be the subject of a prior which the water is pumped;
agreement between the supplier and the industrial
user. b) a pump;
In order to obtain a given foam concentrate ratio, the c) a proportioner used to add the foam concentrate;
solution may be prepared in a container by mixing d) a system of rigid pipes, fire hoses and valves to
finite volumes of water and foam concentrate. transfer the solution to the foam generator;
In the event that testing is intended to demonstrate the e) a waste water circuit fitted with a flow-control
compatibility between the foam concentrate and the valve.
foam generating equipment, a proportioner may then
A.3.2 Production of solution
be used, similar to the equipment selected by the
industrial user. A.3.2.1 Preliminary adjustment
A.2 Foam producing equipment with prior The following preliminary adjustments are carried out:
preparation of solution in a container a) start up and adjustment of the pump to ensure
operation of the foam generator at its rated output;
A.2.1 Overall design
NOTE. It is not necessary when adjusting the pump to supply
A diagram of the proposed test rig is presented on foam concentrate to the proportioner.
figure A.1. It consists of the following components: b) release of the water returned by the pump
a) a tank designed to prepare the solution required through the waste water circuit, in order to adjust
for testing; the flow control valve and ensure that its head loss
b) a pump designed to provide recycling of the is identical to that of the transfer circuit to the foam
solution and its transfer into the foam generating generator;
system; c) filling of the pipes and the fire hoses connected to
c) rigid pipes, fire hoses pipes and valves comprising the foam generator, with solution.
the solution recycling circuit and the solution A.3.2.2 Test procedure
transfer circuit to the foam generator;
For production of foam using a foam generator
d) foam generator. operating under nominal conditions, it is recommended
A.2.2 Preparation and production of solution to apply the following procedure:
In this case, the applicable procedure is as follows: a) start up of the pump to ensure that the foam
a) the water and foam concentrate volumes required generator operates at its rated output; water is
to obtain the desired foam concentrate ratio are returned through the waste water circuit;
determined; b) closure of the waste water circuit and,
NOTE. These volumes can be determined on the basis of the simultaneously, opening of the transfer circuit to the
total estimated quantity of solution required for the test. foam generator;
b) the tank is filled with the water volume c) start of the foam expansion ratio measuring test.
previously calculated; NOTE. The foam generator should be placed on a rotating table,
thereby enabling the generated foam to be discharged outside the
c) the foam concentrate volume previously impounding area at the beginning of the test. Once the foam
calculated is added; generator operates under nominal operating conditions, the
d) the solution to ensure homogeneous mixing of rotating table can then be oriented to discharge the foam into the
test impounding area.
the water and the foam concentrate is recycled.
NOTE. Measures should be taken in order to prevent the
formation of foam inside the solution tank.

 BSI 1998
 BSI 1998

1 Tank 5 Isolating valve

2 Tank isolating valve 6 Control valve
3 Filter 7 Foam generator
4 Pump 8 Impounding area

Figure A.1 Diagram of generating system with prior preparation of solution

EN 12065 : 1997
Page 9
 EN 12065 : 1997
Page 10
1 Tank 6 Control valve
2 Tank isolating valve 7 Foam concentrate storage
3 Filter 8 Proportioner
4 Pump 9 Foam generator
5 Isolating valve 10 Impounding area

Figure A.2 Diagram of a foam generating system with foam production using a proportioner
 BSI 1998
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EN 12065 : 1997

Annex B (informative)
Measuring equipment used to quantify
foam production
B.1 General remarks
Since all measurements should be recorded, it is
recommended that a data acquisition system connected
to a computer is provided.
B.2 Measuring devices
The measuring devices necessary to quantify foam
production are listed in table B.1

Table B.1 List of the measuring devices

Measuring devices Measurements
Water meter Quantity of water used to fill the
tank. Only required if using
previously mixed solution
Flowmeter Flow rate of solution
Electronic scales Weight of foam concentrate used
to prepare the solution or when
using a proportioner
Pressure Pressure at foam generator input
measuring device

B.3 Layout of measuring devices in test rig

Measuring devices should be positioned in accordance
with the diagram shown:
± on figure B.1 for a test rig with prior preparation
of solution;
± on figure B.2 for a test rig with a proportioner.

 BSI 1998
 EN 12065 : 1997
Page 12
1 Water meter _____ production of solution
2 Flowmeter
3 Pressure measuring device ........... preparation of solution

Figure B.1 Layout of measuring devices on test rig with prior preparation of solution
 BSI 1998
 BSI 1998

1 Electronic scales
2 Flowmeter
3 Pressure measuring device

Figure B.2 Layout of measuring devices on test rig with proportioner

EN 12065 : 1997
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Page 14
EN 12065 : 1997

Annex C (normative)
Measuring equipment used to determine
fire conditions
C.1 General remarks
Since the execution of the LNG fire test requires real
time processing of the measurements, a data
acquisition system connected to a computer shall be
used.
C.2 Type and layout of sensors
The sensors required to evaluate the fire activity shall
be as listed in 4.3.2.
Sensor layout shall fulfill the following requirements:
± radiometers shall be positioned 1 m above the
open surface of the impounding area;
± thermocouples shall be positioned below the open
surface of the impounding area in order to measure
the foam destruction rate.
The position of sensors in relation to the bund shall be
as specified on table C.1 and on figure C.1.

Table C.1 Position of thermocouples

Reference of Location of thermocouple from the
thermocouple base of the bund
mm

T1 250
T2 420
T3 580
T4 750
T5 920
T6 1070
T7 1250
T8 1420

 BSI 1998
 Page 15
EN 12065 : 1997

1 Foam generator 3 Temperature mast

2 Radiometer 4 Impounding area
R Radius of the impounding area
Figure C.1 Positioning of sensors for determination of fire conditions

 BSI 1998
Page 16
EN 12065 : 1997

Annex D (normative) D.3 Height of foam required for fire

containment
Method of calculating the parameters
The required height of foam Hm, in metres, shall be
used to determine the efficiency of the determined on the basis of an analysis of the
foam concentrate temperatures measured by the thermocouples arranged
on the mast positioned at the centre of the impounding
D.1 Fire containment time
area:
The fire containment time, tc, shall correspond to the Hthi + 1 2 Hthi
time interval elapsed between the instant when the Hm = Hthi + (D.5)
foam starts being discharged into the impounding area 2
and the instant when the reduced radiation is less than where:
or equal to 10 % of the mean initial radiation over a
completed period of 10 s. Hthi is the position of the highest
tc = tf10 % 2 tg (D.1) thermocouple thi showing a temperature
where: below 100 ÊC during the continuous 10 s
period during which the reduced
tg is the instant when foam discharge starts, in radiation is less than or equal to 10 % of
seconds; the initial radiation, in metres;
tf10 % is the instant when the reduced radiation is Hthi + 1 is the height of thermocouple thi + 1
less than or equal to 10 % of the mean initial positioned above thermocouple thi, in
radiation over a completed period of 10 s. metres.
D.2 Volume of foam concentrate required to D.4 Foam concentrate consumption required for
contain the fire fire control
D.2.1 Test rig with prior preparation of solution D.4.1 Test rig with prior preparation of solution
in a tank in a tank
The volume of foam concentrate per surface unit Vem The consumption rate of foam concentrate Cem shall
shall be derived from the flow rate of the solution Qsol be derived from the solution flow rate Qsol and
in cubic metres per second, and calculated as follows: calculated as follows:
tf10 %
1 ⌠ t2
1 ⌠
S ⌡
Vsol = Qsol dt (D.2)
S ⌡
Vsol = Qsoldt (D.6)
t g t 1
where:
where:
S is the surface area of the impounding area, in
square metres; t1 is the instant, in seconds, at the end of the first
Vsol is the volume of solution used per surface unit, foam discharge, when the reduced radiation is
in cubic metres per square metre. less than or equal to 10 % of the mean initial
radiation over a completed period of 10 s;
Vem = t´Vsol (D.3)
t2 is the instant, in seconds, at the end of the last
foam discharge, when the reduced radiation is
where: less than or equal to 10 % of the mean initial
radiation over a completed period of 10 s.
t is the foam concentrate ratio.
t´Vsol
D.2.2 Test rig with proportioner Cem = (D.7)
t2 2 t1
The volume of foam concentrate per surface unit Vem
where:
shall be derived from continuous weighing of the foam
concentrate container:
t is the foam concentrate ratio.
1 1
Vem = ´ ´ (Mg 2 Mf10 % ) (D.4)
S rem
where:
Mg is the mass of foam concentrate stored at
time tg, in kilograms;
Mf10 % is the mass of foam concentrate remaining
at time tf10 %, in kilograms;
rem is the density of the foam concentrate, in
kilograms per cubic metre.

 BSI 1998
 Page 17
EN 12065 : 1997

D.4.2 Test rig with proportioner

The consumption rate of foam concentrate Cem shall
be derived from continuous weighing of the foam
concentrate container:
1 1 Mt1 2 Mt2
Cem = ´ ´ (D.8)
S rem t2 2 t1
where:

Mt1 is the mass of foam concentrate initially stored

at time t1, in kilograms;
Mt2 is the mass of foam concentrate remaining at
time t2, in kilograms.

D.5 Rate of foam destruction

The foam destruction rate Vdest expressed in m/s shall
be determined by analysing, after the last foam
discharge, the temperatures measured by the
thermocouples arranged on the vertical mast
positioned at the centre of the impounding area, as a
function of time. The destruction rate shall be
calculated as follows:
0,5
Vdest = (D.9)
tth0,75 m 2 tth1,25 m
where:

tth1,25 m is the time, expressed in seconds, when the

thermocouple located 1,25 m from the base
of the impounding area is no longer
immersed in foam and detects a temperature
greater than or equal to 100 ÊC;
tth0,75 m is the time, expressed in seconds, when the
thermocouple located 0,75 m from the base
of the bund is no longer immersed in foam
and detects a temperature greater than or
equal to 100 ÊC.

 BSI 1998
Page 18
EN 12065 : 1997

Annex E (normative)
Special test rig required to test the compatibility between foam and extinguishing
powder

1 Foam generator
2 Extinguishers
3 Impounding area
R Radius of the impounding area

Figure E.1 Test rig configuration

 BSI 1998
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