Fixed firefighting systems - Components for gas extinguishing systems - Part 11: Requirements and test methods for mechanical weighing devices

This European Standard specifies requirements and test methods for mechanical weighing devices for continuous monitoring of containers of CO2-, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.
This European Standard does not cover weighing devices for non-transportable containers which are filled and refilled on site, e.g. CO2-low-pressure containers.

Ortsfeste Brandbekämpfungsanlagen - Bauteile für Löschanlagen mit gasförmigen Löschmitteln - Teil 11: Anforderungen und Prüfverfahren für mechanische Wägeeinrichtungen

Diese Norm legt Anforderungen und Prüfverfahren für mechanische Abwiege-Vorrichtungen zur dauerhaften Überwachung von Behältern mit CO2- Inertgas- oder Feuerlöschanlagen mit halogenierten Kohlenwasserstoffen.
Dieser Europäische Norm befasst sich nicht mit Abwiege-Vorrichtungen für nicht transportierbare Behälter, die vor Ort(wieder-)befüllt werden, wie z. B. CO2-Niederdruckbehälter.

Installations fixes de lutte contre l’incendie - Éléments constitutifs des installations d’extinction à gaz - Partie 11 : Exigences et méthodes d’essai pour dispositifs de pesée mécaniques

La présente Norme européenne spécifie les exigences et les méthodes d’essai applicables aux dispositifs de pesée mécaniques pour la surveillance continue de réservoirs d’installations d’extinction incendie à CO2, à gaz inerte ou à gaz halogéné.
La présente Norme européenne ne s’applique pas aux dispositifs de pesée pour réservoirs non transportables qui sont remplis et re-remplis sur site, par exemple les réservoirs à CO2 basse pression.

Vgrajeni gasilni sistemi - Sestavni deli sistemov za gašenje s plinom - 11. del: Zahteve in preskusne metode za mehanske naprave za tehtanje

General Information

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Current Stage
4060 - Closure of enquiry - Enquiry
Due Date
09-Sep-2016
Completion Date
09-Sep-2016

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SLOVENSKI STANDARD
oSIST prEN 12094-11:2016
01-september-2016
Vgrajeni gasilni sistemi - Sestavni deli sistemov za gašenje s plinom - 11. del:
Zahteve in preskusne metode za mehanske naprave za tehtanje
Fixed firefighting systems - Components for gas extinguishing systems - Part 11:
Requirements and test methods for mechanical weighing devices
Ortsfeste Brandbekämpfungsanlagen - Bauteile für Löschanlagen mit gasförmigen
Löschmitteln - Teil 11: Anforderungen und Prüfverfahren für mechanische
Wägeeinrichtungen

Installations fixes de lutte contre l’incendie - Éléments constitutifs des installations

d’extinction à gaz - Partie 11 : Exigences et méthodes d’essai pour dispositifs de pesée

mécaniques
Ta slovenski standard je istoveten z: prEN 12094-11
ICS:
13.220.10 Gašenje požara Fire-fighting
oSIST prEN 12094-11:2016 en,fr,de

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

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oSIST prEN 12094-11:2016
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oSIST prEN 12094-11:2016
DRAFT
EUROPEAN STANDARD
prEN 12094-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2016
ICS 13.220.20 Will supersede EN 12094-11:2003
English Version
Fixed firefighting systems - Components for gas
extinguishing systems - Part 11: Requirements and test
methods for mechanical weighing devices

Installations fixes de lutte contre l'incendie - Éléments Ortsfeste Brandbekämpfungsanlagen - Bauteile für

constitutifs des installations d'extinction à gaz - Partie Löschanlagen mit gasförmigen Löschmitteln - Teil 11:

11 : Exigences et méthodes d'essai pour dispositifs de Anforderungen und Prüfverfahren für mechanische

pesée mécaniques Wägeeinrichtungen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 191.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
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. prEN 12094-11:2016 E

worldwide for CEN national Members.
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Contents page

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

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Terms and definitions ................................................................................................................................... 5

3 Product characteristics ................................................................................................................................. 6

3.1 General ................................................................................................................................................................ 6

3.2 Operational reliability ................................................................................................................................... 6

3.3 Durability of operational reliability ......................................................................................................... 7

4 Testing, assessment and sampling methods ......................................................................................... 7

4.1 General ................................................................................................................................................................ 7

4.2 Operational reliability ................................................................................................................................... 7

4.3 Durability of operational reliability ......................................................................................................... 9

5 Marking and documentation ....................................................................................................................... 9

5.1 Marking ............................................................................................................................................................... 9

5.2 Documentation ................................................................................................................................................. 9

6 Assessment and verification of constancy of performance (AVCP) ........................................... 10

6.1 General ............................................................................................................................................................. 10

6.2 Type testing .................................................................................................................................................... 10

6.3 Factory production control (FPC) .......................................................................................................... 12

Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU

Construction Products Regulation ......................................................................................................... 18

A.1 Scope and relevant characteristics ........................................................................................................ 18

A.2 System of Assessment and Verification of Constancy of Performance (AVCP) ...................... 18

A.3 Assignment of AVCP tasks ......................................................................................................................... 19

Bibliography ................................................................................................................................................................. 20

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European foreword

This document (prEN 12094-11:2016) has been prepared by Technical Committee CEN/TC 191 “Fixed

firefighting system”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Regulation (EU) 305/2011.

For relationship with EU Regulation (EU) 305/2011, see informative Annex ZA which is an integral part of

this document.

EN 12094, Fixed firefighting systems - Components for gas extinguishing systems, consists of the following

parts:

— Part 1: Requirements and test methods for electrical automatic control and delay devices

— Part 2: Requirements and test methods for non-electrical automatic control and delay devices

— Part 3: Requirements and test methods for manual triggering and stop devices

— Part 4: Requirements and test methods for container valve assemblies and their actuators

— Part 5: Requirements and test methods for high and low pressure selector valves and their actuators

— Part 6: Requirements and test methods for non-electrical disable devices
— Part 7: Requirements and test methods for nozzles for CO systems
— Part 8: Requirements and test methods for connectors
— Part 9: Requirements and test methods for special fire detectors

— Part 10: Requirements and test methods for pressure gauges and pressure switches

— Part 11: Requirements and test methods for mechanical weighing devices
— Part 12: Requirements and test methods for pneumatic alarm devices
— Part 13: Requirements and test methods for check valves and non-return valves
low pressure systems
— Part 16: Requirements and test methods for odorizing devices for CO
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Introduction

It has been assumed in the preparation of this European Standard that the execution of its provisions is

entrusted to appropriately qualified and experienced people.

All pressure data in this European Standard are given as gauge pressures in bar, unless otherwise stated.

5 -2
NOTE 1 bar = 10 N m = 100 kPa.
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1 Scope

This European Standard specifies requirements and test methods for mechanical weighing devices for

continuous monitoring of containers of CO -, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.

This European Standard does not cover weighing devices for non-transportable containers which are filled

and refilled on site, e.g. CO -low-pressure containers.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
CO -high-pressure installation
fire extinguishing installation in which the CO is stored at ambient temperature

Note 1 to entry: For example, the pressure of the CO in storage is p = 58,6 bar at 21 °C.

2 abs
2.2
CO -low-pressure installation

fire extinguishing installation in which the CO is stored at low temperature, normally – 19 °C to –21 °C

2.3
gross load

mass of a container filled with extinguishing medium including valve and actuator

2.4
fill ratio

mass of extinguishing medium related to the nominal internal volume of a container expressed in kilograms

per litre
2.5
halocarbon gas

extinguishing agent that contains as primary components one or more organic compounds containing one or

more of the elements fluorine, chlorine, bromine or iodine
2.6
halocarbon gas installation

fire extinguishing installation in which the halocarbon gas is stored at ambient temperature

2.7
inert gas

non liquefied gas or mixture of gases which extinguish the fire mainly by reducing the oxygen-concentration

in the protected zone
Note 1 to entry: E.g. Argon, Nitrogen or CO or mixtures of these gases.
2.8
inert gas installation

fire extinguishing installation in which the inert gas is stored at ambient temperature

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2.9
net load
mass of the extinguishing medium in a container
3 Product characteristics
3.1 General
3.1.1 Design

A weighing device may be designed for monitoring containers of various sizes, with various fill ratios or with

various gases.

NOTE Different combinations of size, fill ratio (where applicable) and type of gas result in different values for gross

and net load.

For each combination of gross load and net load, which the weighing device is used for, the manufacturer

shall specify:
a) type of gas;
b) nominal internal volume of the container;
c) net load;
d) gross load;
e) fill ratio, if applicable.

A weighing device shall be adjustable to give a loss indication when a mass loss between 5 % and 10 % of the

net load occurs. The loss indication shall be maintained until corrective action is taken.

Normal building movement should not generate a false loss indication.
3.1.2 Object of the test

The test sample shall comply with the documentation (drawings, parts lists, description of functions,

operating and installation instructions) when assessed in accordance with 4.1.2.
3.2 Operational reliability
3.2.1 Function at normal temperature

A weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested in

accordance with 4.2.1.
3.2.2 Function at high and low temperature

A weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested at –

20 °C and + 50 °C in accordance with 4.2.2.
3.2.3 Overload

A weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested in

accordance with 4.2.1.2, after being loaded with twice the maximum gross load in accordance with 4.2.3.

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3.3 Durability of operational reliability
3.3.1 Corrosion

A weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested in

accordance with 4.2.1.2, after being subjected to the corrosive atmosphere in accordance with 4.3.1.

4 Testing, assessment and sampling methods
4.1 General
4.1.1 Test conditions

The component shall be assembled for test as specified in the documentation. The tests shall be carried out

at a temperature of (25 ± 10) °C, except when otherwise specified for a particular test.

The tolerance for all test parameters is 5 %, unless otherwise stated.
4.1.2 Object of the test
This test relates to the requirements of 3.1.2.

A visual and measurement check shall be made to determine that the test sample corresponds to the

description in the drawings, parts lists, description of functions, operating and installation instructions.

4.1.3 Test samples and order of tests
For the tests one sample is needed. The order of tests is shown in Table 1.
Table 1 — Order of tests
Order of test Test
1 4.1.2 Object of the test
2 4.2.1 Function at normal temperature
3 4.2.2 Function at high and low temperature
4 4.2.3 Overload
5 4.2.1.2 Function at normal temperature
6 4.3.1 Corrosion
7 4.2.1.2 Function at normal temperature
4.2 Operational reliability
4.2.1 Function at normal temperature
4.2.1.1 This test relates to the requirements of 3.2.1.

If a weighing device is specified by the manufacturer for one combination of gross load and net load, the

following sequence a) to d) shall be conducted with the specified gross load and net load.

If a weighing device is specified by the manufacturer for several combinations of gross load and net load, the

following sequence a) to d) shall be conducted with the following combinations of gross load and net load:

— maximum gross load, maximum net load;
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— maximum gross load, minimum net load;
— medium gross load, medium net load;
— minimum gross load, maximum net load;
— minimum gross load, minimum net load.

a) Load the test sample with the gross load including an amount of water. The mass of the water shall be at

least 15 % of the net load;

b) Adjust the test sample in accordance with the installation instructions of the manufacturer to

correspond to the actual test load applied;
c) Carry out the following steps:

1) decrease the test load corresponding to a loss of 5 % of the net load by draining water in a period of

2 min to 5 min into a collecting container;
2) stop when loss is indicated;

3) measure and record the mass or the volume of the water collected (permissible error ± 0,5 % of the

net load; 1 l water = 1 kg);
4) add the water to the load again and repeat steps c) 1) to c) 3) twice.

d) If one or more of the three values is not in the range between 5 % and 10 % of the net load, repeat steps

b) and c), carrying out step c) five times (all five values shall be in the range between 5 % and 10 % of

the net load).
4.2.1.2 This test relates to the requirements of 3.2.2, 3.2.3 and 3.3.1.

If a weighing device is specified by the manufacturer for one combination of gross load and net load, the

sequence a) to d) of 4.2.1.1 shall be conducted with the specified gross load and net load.

If a weighing device is specified by the manufacturer for several combinations of gross load and net load, the

sequence a) to d) of 4.2.1.1 shall be conducted with the following combinations of gross load and net load:

— maximum gross load, minimum net load;
— minimum gross load, minimum net load.
4.2.2 Function at high and low temperature
This test relates to the requirements of 3.2.2.

Condition the test sample for at least 4 h at the intended test temperature, i.e. at:

a) (−20 ) °C for low temperature;
) °C for high temperature.
b) (+50
Conduct the test described in 4.2.1.2 at both test temperatures.

For the low test temperature a suitable liquid for use at this temperature shall be used instead of water.

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4.2.3 Overload
This test relates to the requirements of 3.2.3.

The test sample shall be statically loaded with twice the maximum gross load for 15 min.

The force shall be applied in any way which represents the intended normal use.
Conduct the test as described in 4.2.1.2.
4.3 Durability of operational reliability
4.3.1 Corrosion
This test relates to the requirements specified in 3.3.1.
A specimen shall be suspended freely in its normal installation attitude.

The test set-up comprises a container of 5 l volume, made of heat-resistant glass and with a corrosion-

resistant cover which is shaped to prevent condensate dripping onto the specimen. (If a container 10 l in

volume is used, the quantities of chemicals given below shall be doubled.) The container is heated

electrically and the side walls are cooled with water. A thermostat regulates the heating so as to maintain a

temperature of approximately 45 °C inside the container. During testing water is passed through a cooling

coil wrapped around the container; it shall flow fast enough that its temperature at the discharge point is

below 30 °C.

The combination of heating and cooling is designed to ensure that vapours will condense on the surface of

the specimen. The sulphur dioxide atmosphere is generated in the 5 l container with a solution of 20 g of

3 3

sodium thiosulphate (Na S O * 5H O) in 500 cm of distilled water, to which 20 cm of dilute sulphuric acid

2 2 3 2

is added daily. The dilute sulphuric acid comprises 128 cm of one molar sulphuric acid (H SO ) dissolved in

2 4

1 l of distilled water. The test specimens shall be removed from the container after eight days; the container

shall be cleaned. Then the procedure described above is repeated for a further period of eight days.

After a total of 16 days, the specimen is removed from the container and allowed to dry for seven days at a

temperature of (20 ± 5) °C at maximum relative humidity of 70 %.
Conduct the test as described in 4.2.1.2.
5 Marking and documentation
5.1 Marking
A weighing device shall be marked with:
a) model designation (type / environment category, i.e. indoor/outdoor);

b) some mark(s) or code(s) (e.g. serial number or batch code), by which, at least, the date or batch and

place of manufacture (if several places of manufacture) can be identified by the manufacturer;

c) supplier's name or trademark;
d) maximum gross load.
The markings shall be non-detachable, non-flammable, permanent, and legible.
5.2 Documentation
5.2.1 The manufacturer shall prepare and maintain documentation.
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5.2.2 The manufacturer shall prepare installation and user documentation, which shall be submitted to the

testing authority together with the test sample(s). This documentation shall comprise at least the following:

a) a general description of the component, including a list of its features and functions;

b) a technical specification including:
1) the information mentioned in 3.1.1;

2) sufficient information to permit an assessment of the compatibility with other components of the

system (if applicable e.g. mechanical, electrical or software compatibility);
c) installation instructions including mounting instructions;
d) operating instructions;
e) maintenance instructions;
f) routine testing instructions, if appropriate.

5.2.3 The manufacturer shall prepare design documentation, which shall be submitted to the testing

authority together with the test sample(s). This documentation shall include drawings, parts lists, block

diagrams (if applicable), circuit diagrams (if applicable) and a functional description to such an extent that

compliance with this European Standard may be checked and that a general assessment of the design is

made possible.
6 Assessment and verification of constancy of performance (AVCP)
6.1 General

The compliance of mechanical weighing device with the requirements of this Standard and with the

performances declared by the manufacturer in the DoP shall be demonstrated by:
— determination of product type;
— factory production control by the manufacturer, including product assessment.

The manufacturer shall always retain the overall control and shall have the necessary means to take

responsibility for the conformity with its declared performance(s).
6.2 Type testing
6.2.1 General

All performances related to characteristics included in this standard shall be determined when the

manufacturer intends to declare the respective performances unless the standard gives provisions for

declaring them without performing tests. (e.g. use of previously existing data, CWFT and conventionally

accepted performance).

Assessment previously performed in accordance with the provisions of this standard, may be taken into

account provided that they were made to the same or a more rigorous test method, under the same AVCP

system on the same product or products of similar design, construction and functionality, such that the

results are applicable to the product in question.

NOTE Same AVCP system means testing by an independent third party under the responsibility of a notified

product certification body.
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For the purpose of assessment manufacturer’s products may be grouped into families where it is considered

that the results for one or more characteristics from any one product within the family are representative for

that same characteristics for all products within that same family.
Products may be grouped in different families for different characteristics.

Reference to the assessment method standards should be made to allow the selection of a suitable

representative sample.

In addition, the determination of the product type shall be performed for all characteristics included in the

standard for which the manufacturer declares the performance:

— at the beginning of the production of a new or modified mechanical weighing device (unless a member

of the same product range); or

— at the beginning of a new or modified method of production (where this may affect the stated

properties)

They shall be repeated for the appropriate characteristic(s), whenever a change occurs in the mechanical

weighing device design, in the raw material or in the supplier of the components, or in the method of

production (subject to the definition of a family), which would affect significantly one or more of the

characteristics.

Where components are used whose characteristics have already been determined, by the component

manufacturer, on the basis of assessment methods of other product standards, these characteristics need not

be re-assessed. The specifications of these components shall be documented.

Products bearing regulatory marking in accordance with appropriate harmonized European specifications

may be presumed to have the performances declared in the DoP, although this does not replace the

responsibility on the manufacturer to ensure that the mechanical weighing device as a whole is correctly

manufactured and its component products have the declared performance values.
6.2.2 Test samples, testing and compliance criteria

The number of samples of mechanical weighing device to be tested/assessed shall be in accordance with 5.1.

6.2.3 Test reports

The results of the determination of the product type shall be documented in test reports. All test reports

shall be retained by the manufacturer for at least 10 years after the last date of production of the mechanical

weighing device to which they relate.
6.2.4 Shared other party results

A manufacturer may use the results of the product type determination obtained by someone else (e.g. by

another manufacturer, as a common service to manufacturers, or by a product developer), to justify his own

declaration of performance regarding a product that is manufactured according to the same design (e.g.

dimensions) and with raw materials, constituents and manufacturing methods of the same kind, provided

that:

— the results are known to be valid for products with the same essential characteristics relevant for the

product performance;

— in addition to any information essential for confirming that the product has such same performances

related to specific essential characteristics, the other party who has carried out the determination of the

product type concerned or has had it carried out, has expressly accepted1 to transmit to the

manufacturer the results and the test report to be used for the latter’s product type determination, as

well as information regarding production facilities and the production control process that can be taken

into account for FPC;
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— the manufacturer using other party results accepts to remain responsible for the product having the

declared performances and he also:

a) ensures that the product has the same characteristics relevant for performance as the one that has

been subjected to the determination of the product type, and that there are no significant

differences with regard to production facilities and the production control process compared to that

used for the product that was subjected to the determination of the product type; and

b) keeps available a copy of the determination of the product type report that also contains the

information needed for verifying that the product is manufactured according to the same design and

with raw materials, constituents and manufacturing methods of the same kind.
6.3 Factory production control (FPC)
6.3.1 General

The manufacturer shall establish, document and maintain an FPC system to ensure that the products placed

on the market comply with the declared performance of the essential characteristics.

The FPC system shall consist of:
— procedures;
— regular inspections and tests or assessments or both;
— the use of the results to control:
a) raw and other incoming materials or components;
b) equipment;
c) the production process and the product.

All the elements, requirements and provisions adopted by the manufacturer shall be documented in a

systematic manner in the form of written policies and procedures. This factory production control system

documentation shall:

— ensure a common understanding of the evaluation of the constancy of performance;

— enable the achievement of the required product performances;
— enable the effective operation of the production control system to be checked.

Factory production control, therefore, brings together operational techniques and all measures allowing

maintenance and control of the compliance of the product with the declared performance(s) of the essential

characteristics.

In case the manufacturer has used shared product type results, the FPC shall also include the appropriate

documentation as foreseen in 6.2.4.
6.3.2 Requirements
6.3.2.1 General

The manufacturer is responsible for organizing the effective implementation of the FPC system in line with

the content of this product standard. Tasks and responsibilities in the production control organization shall

be documented and this documentation shall be kept up-to-date.
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The responsibility, authority and the relationship between personnel that manages, performs or verifies

work affecting product constancy shall be defined. This applies in particular to personnel that need to

initiate actions preventing product non-constancies from occurring, actions in case of non-constancies and

to identify and register product constancy problems.

Personnel performing work affecting the constancy of performance of the product shall be competent on the

basis of
...

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