Food processing machinery - Bulk milk coolers on farms - Requirements for performance, safety and hygiene

1.1   This document specifies requirements for design, performance, safety and hygiene of refrigerated bulk milk coolers and the related methods of test.
NOTE   The informative Annex J gives some elements regarding the estimation and calculation of energy consumption.
This document deals with all significant hazards, hazardous situations and events relevant to bulk milk coolers on farm, when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).
It applies to refrigerated bulk milk tanks with air-cooled condensing units and automatic control intended for installation on farms or at milk collection points. It applies to tanks for two milkings (24 h), four milkings (48 h) and six milkings (72 h), in which the cooling takes place totally (non-pre-cooled milk) or partially (in case of pre-cooled milk) within the tank. It also applies to tanks in combination with a continuous system of milking (e.g. milking with robot).
1.2   This document does not cover:
-   mobile tanks;
-   tanks intended to be tilted for drainage;
-   equipment for delivering the milk to the tank;
-   equipment for pre-cooling of the milk;
-   the hazards due to the use of other energy than electrical energy;
-   pressure aspect of vacuum tanks (i.e. tanks where the inner part of the vessel is designed to operate at a pressure below atmospheric pressure).
1.3   Noise is not considered to be a significant hazard, but relevant for bulk milk coolers. This document therefore includes information in 7.1 and in Annex A concerning the manufacturer's declaration of the noise emission level of the cooler.
1.4   This document does not cover the calibration requirements for the tank to be used as a system for payment purpose.
1.5   This document is not applicable to bulk milk coolers on farm which are manufactured before the date of its publication as EN.

Nahrungsmittelmaschinen - Behältermilchkühlanlagen für Milcherzeugerbetriebe - Anforderungen an Leistung, Sicherheit und Hygiene

1.1   Dieses Dokument legt die Anforderungen für die Konstruktion, Leistung, Sicherheit und Hygiene von Behälter Milchkühlanlagen und die damit verbundenen Prüfverfahren fest.
ANMERKUNG   Der informative Anhang J enthält einige Elemente zur Schätzung und Berechnung der Energieaufnahme.
Dieses Dokument behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefährdungs-ereignisse, die auf Behälter Milchkühlanlagen für Milcherzeugerbetriebe zutreffen, wenn sie bestimmungsgemäß und unter Bedingungen von durch den Hersteller vernünftigerweise vorhersehbaren Fehlanwendungen verwendet werden (siehe Abschnitt 4).
Es gilt für Behälter Milchkühlanlagen mit luftgekühlten Verflüssigersätzen und automatischer Steuerung, die für die Aufstellung in Milcherzeugerbetrieben oder in Milchsammelstellen bestimmt sind. Es gilt für Kühltanks für zwei Gemelke (24 h), vier Gemelke (48 h) und sechs Gemelke (72 h), bei denen die Kühlung vollständig (nicht vorgekühlte Milch) oder teilweise (im Fall von vorgekühlter Milch) innerhalb des Kühltanks erfolgt. Es gilt auch für Tanks in Verbindung mit einer kontinuierlichen Melkanlage (z. B. Melkautomat).
1.2   Dieses Dokument gilt nicht für:
-   mobile Tanks;
-   Tanks, die zur Entleerung gekippt werden;
-   die Ausrüstung für die Befüllung des Tanks mit Milch;
-   die Ausrüstung für das Vorkühlen der Milch;
-   die Gefährdungen durch die Verwendung anderer Energie als Elektrizität;
-   die Druckaspekte von Vakuumtanks (d. h. Tanks, bei denen der innenliegende Teil des Behälters für den Betrieb bei einem Druck unter dem Atmosphärendruck ausgelegt ist).
1.3   Lärm wird nicht als signifikante Gefährdung für Behälter Milchkühlanlagen angesehen. Das vorliegende Dokument enthält in 7.1 und Anhang A Informationen über die Erklärung des Herstellers zum Geräuschemissionspegel des Kühlbehälters.
1.4   Dieses Dokument enthält keine Anforderungen an die Kühltankkalibrierung, die für Abrechnungszwecke benutzt werden.
1.5   Dieses Dokument gilt nicht für Behälter Milchkühlanlagen für Milcherzeugerbetriebe, die vor dem Datum ihrer Veröffentlichung als EN hergestellt wurden.

Machines pour les produits alimentaires - Refroidisseurs de lait en vrac à la ferme - Prescriptions pour les performances, la sécurité et l'hygiène

1.1   Le présent document spécifie les prescriptions relatives à la conception, aux performances, à la sécurité et à l’hygiène des refroidisseurs de lait en vrac avec groupe frigorifique ainsi que les méthodes d’essai correspondantes.
NOTE   L’Annexe J informative donne des éléments concernant l’estimation et le calcul de la consommation d’énergie.
Le présent document traite de tous les phénomènes dangereux, situations et événements dangereux significatifs spécifiques aux refroidisseurs de lait en vrac à la ferme, lorsqu’ils sont utilisés normalement et dans les conditions de mauvais usage raisonnablement prévisible par le constructeur (voir Article 4).
Il s’applique aux refroidisseurs de lait en vrac avec groupe frigorifique refroidi par air et commande automatique, destinés à être installés dans des fermes ou dans des centres de ramassage du lait. Il s’applique aux refroidisseurs « deux traites » (24 h), « quatre traites » (48 h) et « six traites » (72 h), dans lesquels le refroidissement s’effectue entièrement (lait non prérefroidi) ou partiellement (lait prérefroidi) dans la cuve. Il s’applique également aux refroidisseurs associés à un système de traite en continu (par exemple, traite effectuée par un robot).
1.2   Le présent document ne couvre pas :
-   les refroidisseurs mobiles ;
-   les refroidisseurs prévus pour être basculés lors de la vidange ;
-   l’équipement d’introduction du lait dans le refroidisseur ;
-   l’équipement de prérefroidissement du lait ;
-   les phénomènes dangereux engendrés par l’utilisation d’une énergie autre qu’électrique ;
-   la question de la pression des refroidisseurs sous vide (c’est-à-dire, des refroidisseurs où la cuve intérieure est destinée à fonctionner à une pression inférieure à la pression atmosphérique).
1.3   Le bruit n’est pas considéré comme un phénomène dangereux significatif, mais comme un phénomène dangereux pertinent pour les refroidisseurs de lait en vrac. Par conséquent, le présent document inclut, en 7.1 et à l’Annexe A, les informations relatives à la déclaration par le constructeur du niveau sonore du refroidisseur.
1.4   Le présent document ne couvre pas les prescriptions de jaugeage du refroidisseur à utiliser comme système de paiement.
1.5   Le présent document ne s’applique pas aux refroidisseurs de lait en vrac à la ferme construits avant sa date de publication en tant que norme EN.

Stroji za predelavo hrane - Hladilniki za shranjevanje namolzenega mleka - Zahteve za zmogljivost, varnost in higieno

General Information

Status
Published
Public Enquiry End Date
29-Nov-2019
Publication Date
10-Nov-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Jul-2022
Due Date
26-Sep-2022
Completion Date
11-Nov-2022

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SLOVENSKI STANDARD
SIST EN 13732:2022
01-december-2022
Nadomešča:
SIST EN 13732:2013

Stroji za predelavo hrane - Hladilniki za shranjevanje namolzenega mleka - Zahteve

za zmogljivost, varnost in higieno
Food processing machinery - Bulk milk coolers on farms - Requirements for
performance, safety and hygiene
Nahrungsmittelmaschinen - Behältermilchkühlanlagen für Milcherzeugerbetriebe -
Anforderungen an Leistung, Sicherheit und Hygiene

Machines pour les produits alimentaires - Refroidisseurs de lait en vrac à la ferme -

Prescriptions pour les performances, la sécurité et l'hygiène
Ta slovenski standard je istoveten z: EN 13732:2022
ICS:
65.040.10 Poslopja, naprave in oprema Livestock buildings,
za živino installations and equipment
67.260 Tovarne in oprema za živilsko Plants and equipment for the
industrijo food industry
SIST EN 13732:2022 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 13732:2022
---------------------- Page: 2 ----------------------
SIST EN 13732:2022
EN 13732
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 65.040.10; 67.260 Supersedes EN 13732:2013
English Version
Food processing machinery - Bulk milk coolers on farms -
Requirements for performance, safety and hygiene

Machines pour les produits alimentaires - Nahrungsmittelmaschinen - Behältermilchkühlanlagen

Refroidisseurs de lait en vrac à la ferme - Prescriptions für Milcherzeugerbetriebe - Anforderungen an

pour les performances, la sécurité et l'hygiène Leistung, Sicherheit und Hygiene
This European Standard was approved by CEN on 10 January 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13732:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13732:2022
EN 13732:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Safety requirements and/or protective measures — Performance .......................................... 13

4.1 General ............................................................................................................................................................. 13

4.2 Mechanical hazards ..................................................................................................................................... 14

4.3 Electrical hazards ......................................................................................................................................... 15

4.4 Thermal hazards and hazards generated by materials and substances used ....................... 15

4.5 Hygiene ............................................................................................................................................................ 15

4.6 Energy consumption ................................................................................................................................... 21

4.7 Ergonomics ..................................................................................................................................................... 21

4.8 Provisions for maintenance ..................................................................................................................... 22

4.9 Other general requirements for tanks ................................................................................................. 22

4.10 Additional requirements for ice bank tanks ...................................................................................... 25

4.11 Noise ................................................................................................................................................................. 25

5 Verification and tests .................................................................................................................................. 26

6 Information for use ..................................................................................................................................... 29

6.1 General ............................................................................................................................................................. 29

6.2 Warning signs and signals ........................................................................................................................ 29

6.3 Instruction handbook ................................................................................................................................. 30

6.4 Instructions check list ................................................................................................................................ 31

6.5 Installation and maintenance instructions ........................................................................................ 32

6.6 Minimum marking ....................................................................................................................................... 33

Annex A (informative) List of significant hazards ........................................................................................... 35

Annex B (normative) Noise test code (Grade 2 of accuracy) ....................................................................... 37

Annex C (normative) Electrical requirements for bulk milk coolers according to EN 60204-

1:2018 .............................................................................................................................................................. 41

Annex D (normative) Electrical requirements for bulk milk coolers according to EN 60335-

1:2012 .............................................................................................................................................................. 43

Annex E (normative) Test for cooling, thermal insulation, mixing tests ................................................ 49

Annex F (normative) Test for cleanability and cleaning performance .................................................... 67

Annex G (normative) Sampling methods for milk mixing tests ................................................................. 76

Annex H (normative) Equipment and installation for the tests for cleanability and cleaning

performance required in Annex F .......................................................................................................... 77

Annex I (normative) Evaluation of stainless steel equivalence ................................................................. 83

Annex J (informative) Example of milk tank service record ....................................................................... 86

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SIST EN 13732:2022
EN 13732:2022 (E)

Annex K (informative) Estimation and measurement of the energy consumption ............................. 88

Annex L (informative) Safe access and rescue .................................................................................................. 93

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ...................................................... 95

Bibliography ................................................................................................................................................................. 97

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SIST EN 13732:2022
EN 13732:2022 (E)
European foreword

This document (EN 13732:2022) has been prepared by Technical Committee CEN/TC 153 “Machinery

intended for use with foodstuffs and feed”, the secretariat of which is held by DIN.

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 January 2023, and conflicting national standards shall

be withdrawn at the latest by July 2025.

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

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

This document supersedes EN 13732:2013.
In comparison with the previous edition, the following changes have been made:
a) addition of continuous system of milking in the scope;
b) updating of normative references;
c) specification of stainless steel equivalence;

d) new informative annex regarding estimation and measurement of energy consumption;

e) technical and editorial modifications.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part

of this document.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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

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

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 13732:2022
EN 13732:2022 (E)
Introduction
This document is a type-C standard as stated in EN ISO 12100:2010.

This document is of relevance, in particular, for the following stakeholder groups representing the market

players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document. The machinery concerned and the extent to which hazards, hazardous

situations or hazardous events are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or type-B

standards, the requirements of this type-C standard take precedence over the requirements of the other

standards for machines that have been designed and built according to the requirements of this type-C

standard.
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SIST EN 13732:2022
EN 13732:2022 (E)
1 Scope

1.1 This document specifies requirements for design, performance, safety and hygiene of refrigerated

bulk milk coolers and the related methods of test.

NOTE The informative Annex K gives some elements regarding the estimation and calculation of energy

consumption.

This document deals with all significant hazards, hazardous situations and events relevant to bulk milk

coolers on farm, when they are installed, used and maintained as intended by the manufacturer (see

informative Annex A).

It applies to refrigerated bulk milk tanks with air-cooled condensing units and automatic control intended

for installation on farms or at milk collection points. It applies to tanks for two milkings (24 h), four

milkings (48 h) and six milkings (72 h), in which the cooling takes place totally (non-pre-cooled milk) or

partially (in case of pre-cooled milk) within the tank. It also applies to tanks in combination with a

continuous system of milking (e.g. milking with robot).
1.2 This document does not cover:
— mobile tanks;
— tanks intended to be tilted for drainage;
— equipment for delivering the milk to the tank;
— equipment for pre-cooling of the milk;
— the hazards due to the use of other energy than electrical energy;

— pressure aspect of vacuum tanks (tank of which the inner vessel is designed to operate at a pressure

below atmospheric pressure);
— calibration requirements for the measurement of the milk volume.

1.3 This document is not applicable to bulk milk coolers on farms which are manufactured before the

date of its publication as EN.
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.

EN 378-1:2016+A1:2020, Refrigerating systems and heat pumps — Safety and environmental

requirements — Part 1: Basic requirements, definitions, classification and selection criteria

EN 378-2:2016, Refrigerating systems and heat pumps — Safety and environmental requirements —

Part 2: Design, construction, testing, marking and documentation

EN 378-3:2016+A1:2020, Refrigerating systems and heat pumps — Safety and environmental

requirements — Part 3: Installation site and personal protection

EN 378-4:2016+A1:2019, Refrigerating systems and heat pumps — Safety and environmental

requirements — Part 4: Operation, maintenance, repair and recovery
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SIST EN 13732:2022
EN 13732:2022 (E)

EN 1005-3:2002+A1:2008, Safety of machinery — Human physical performance — Part 3: Recommended

force limits for machinery operation

EN 1672-2:2020, Food processing machinery — Basic concepts — Part 2: Hygiene and cleanability

requirements

EN 10088-2:2014, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip of

corrosion resisting steels for general purposes

EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General requirements

EN 60335-1:2012 , Household and similar electrical appliances — Safety — Part 1: General requirements

EN 60335-2-34:2013, Household and similar electrical appliances — Safety — Part 2-34: Particular

requirements for motor-compressors
, Degrees of protection provided by enclosures (IP Code)
EN 60529:1991

EN 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for

visual, acoustic and tactile signals

EN ISO 1211:2010, Milk — Determination of fat content — Gravimetric method (Reference method)

(ISO 1211:2010)

EN ISO 3651-2:1998, Determination of resistance to intergranular corrosion of stainless steels — Part 2:

Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing

sulfuric acid (ISO 3651-2:1998)

EN ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise

sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane

(ISO 3744:2010)

EN ISO 4871:2009, Acoustics — Declaration and verification of noise emission values of machinery and

equipment (ISO 4871:1996)

EN ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission

sound pressure levels at a work station and at other specified positions in an essentially free field over a

reflecting plane with negligible environmental corrections (ISO 11201:2010)

EN ISO 11202:2010 , Acoustics — Noise emitted by machinery and equipment — Determination of

emission sound pressure levels at a work station and at other specified positions applying approximate

environmental corrections (ISO 11202:2010)

As impacted by EN 60335-1:2012/AC:2014, EN 60335-1:2012/A11:2014, EN 60335-1:2012/A13:2017,

EN 60335-1:2012/A1:2019, EN 60335-1:2012/A2:2019 EN 60335-1:2012/A14:2019 and EN 60335-

1:2012/A15:2021.

As impacted by EN 60529:1991/A1:2000, EN 60529:1991/A2:2013 and EN 60529:1991/AC:2016-12.

As impacted by EN ISO 11202:2010/A1:2021.
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SIST EN 13732:2022
EN 13732:2022 (E)

EN ISO 11463:2020, Corrosion of metals and alloys — Guidelines for the evaluation of pitting corrosion

(ISO 11463:2020)

EN ISO 11688-1:2009, Acoustics — Recommended practice for the design of low-noise machinery and

equipment — Part 1: Planning (ISO/TR 11688-1:1995)

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human

responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)

EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by

upper and lower limbs (ISO 13857:2019)

EN ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for

design and selection (ISO 14119:2013)

EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and

construction of fixed and movable guards (ISO 14120:2015)

EN ISO 14122-2:2016, Safety of machinery — Permanent means of access to machinery — Part 2: Working

platforms and walkways (ISO 14122-2:2016)

EN ISO 14122-3:2016, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,

stepladders and guard-rails (ISO 14122-3:2016)

EN ISO 21920-3:2022, Geometrical product specifications (GPS) — Surface texture: Profile — Part 3:

Specification operators (ISO 21920-3:2021)

ASTM G48-11:2015, Standard test methods for pitting and crevice corrosion resistance of stainless steels

and related alloys by use of ferric chloride solution
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,

EN 1672-2:2020 and the following apply.

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

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
refrigerated bulk milk tank

equipment for refrigeration and bulk storage of refrigerated raw milk freshly milked

Note 1 to entry: In the following text, "refrigerated bulk milk tank" is referred as "tank".

Note 2 to entry: Milk freshly milked is milk less than 2 h after being milked.
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SIST EN 13732:2022
EN 13732:2022 (E)
3.2
silo tank
vertical closed tank designed to be standing on a flat horizontal surface
Note 1 to entry: See Figure 1.
Figure 1 — Examples of silo tank
3.3
open tank

tank equipped with a lid which in the open position allows manual washing of the inner vessel

Note 1 to entry: See Figure 2.
Figure 2 — Example of open tank
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SIST EN 13732:2022
EN 13732:2022 (E)
3.4
closed tank

horizontal tank equipped with automatic washing of the inner vessel and manhole with a cover for

inspection
Note 1 to entry: Access through the manhole is only for maintenance.
Note 2 to entry: See Figure 3.
Figure 3 — Example of closed tank
3.5
pre-cooled milk

milk partially or completely cooled to storage temperature before entering the tank

3.6
automatic control

arrangement by which the equipment functions under normal operating conditions, without requiring

action by the operator
3.7
agitator

device to mix the milk to promote heat transfer and to ensure uniform distribution of butter fat

3.8
reference position

position specified by the manufacturer for correct installation and operation of the tank

3.9
maximum volume

volume to which the inner vessel in its reference position and without agitation may be filled without

overflowing (expressed in l)
3.10
rated volume

volume of the maximum permissible filling of the tank under operating conditions as stated by the

manufacturer (expressed in l)
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SIST EN 13732:2022
EN 13732:2022 (E)
3.11
direct cooling system

cooling system in which the evaporator of the refrigerating system is in direct thermal contact with the

milk or the inner vessel
3.12
indirect cooling system

cooling system in which the evaporator of the refrigerating system is not in direct thermal contact with

the milk or the inner vessel and the heat is transferred from the milk to the refrigerant through a cooling

medium
3.13
batch filling tank
tank intended to be filled by a number of milkings
3.14
ice bank tank

tank with an indirect integrated cooling system in which the cooling medium is water and in which ice is

built on the evaporator
3.15
milking

batch of milk (or test water) which is added to the tank and cooled in a specific cooling time

3.16
tank for two milkings

tank intended for cooling and storing milk where the milk is added in two batches, each with a volume

equal to 50 % of the tank rated volume
3.17
tank for four milkings

tank intended for cooling and storing milk where the milk is added in four batches, each with a volume

equal to 25 % of the tank rated volume
3.18
tank for six milkings

tank intended for cooling and storing milk where the milk is added in six batches each, with a volume

equal to 16,7 % of the tank rated volume
3.19
operating conditions

state during which the tank is in use for the cooling and storage of milk in accordance with its design

requirements and all accessories are functioning effectively
3.20
ambient atmosphere

atmosphere surrounding the tank and in front of the air-cooled condenser of the refrigerating system

3.21
mean temperature

calculated average of the different temperatures (in °C) of a medium (air, test water, milk) measured at

different measuring points, at the same time
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SIST EN 13732:2022
EN 13732:2022 (E)
3.22
ambient temperature
mean temperature of the ambient atmosphere (in °C)
3.23
performance temperature
ambient temperature (in °C) to be used when measuring the milk cooling time
3.24
safe operating temperature
SOT

highest limit of the range of ambient temperatures (in °C) at which the equipment is required to function

3.25
initial temperature

mean temperature (in °C) of the milk to be cooled at the time of the commencement of the cooling test

3.26
storage temperature
mean temperature (in °C) to which the milk to be cooled is reduced for storage
3.27
cooling time
time (in h) required to cool a milking from initial temperature to +4 °C
3.28
cooling cycle
period between two successive milk collections
3.29
specific energy consumption

energy consumption in watt-hours per litre (Wh/l) of cooled milk, measured as the mean consumption

of all components (excluding cleaning) during a cooling test under the test conditions appropriate to the

performance class

Note 1 to entry: The specific energy consumption may be also estimated as indicated in the informative Annex K.

3.30
milk

bovine mammary secretion without either addition thereto or extraction therefrom, untreated and not

standardised, complying with Code of Principles concerning milk and milk products, international

standards and standard methods of sampling and analysis for milk products of the Joint FAO/WHO Food

Standards Programme

Note 1 to entry: Food and Agriculture Organisation (FAO)/ World Health Organisation (WHO).

3.31
water

water, suitable for human consumption, meeting the requirements specified in Directive 98/83/EC

relating to the quality of water intended for human consumption
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SIST EN 13732:2022
EN 13732:2022 (E)
3.32
test water
water used for test purpose in place of milk
Note 1 to entry: The cooling time for water is nearly the same as that for milk.
3.33
filling
volume of the milk (or TW) in the tank
3.34
temperature of the milk
mean temperature of the milk (or TW) at a particular moment
Note 1 to entry: See E.1.5.
3.35
compact and plug-in tank

tank where the condensing unit(s) is (are) mounted on the tank and the equipment which leave(s) the

manufacturer and which does not require further refrigerant and installation work to be in full working

condition
3.36
tank for continuous flow

tank designed for cooling milk when added continuously at a rate of x l/h where x is expressed in steps

of 25 l/h
3.37
minimum and maximum flow

minimum and maximum average milk flow rates (expressed in l/h) at which a tank for continuous flow

is designed to operate
3.38
minimum cooling volume

minimum quantity or flow rate at which the tank may operate without formation of ice:

— two milkings tanks: V × 0,2;
— four milkings tanks: V × 0,1;
— six milkings tanks: V × 0,067;
— continuous flow tank: according to the minimum flow given by the manufacturer
4 Safety requirements and/or protective measures — Performance
4.1 General

Machinery shall comply with the safety requirements and/or protective measures of this clause.

In addition, the machine shall be designed according to the principles of EN ISO 12100:2010 for hazards

relevant but not significant, and for hazards arising under the conditions of misuse which are reasonably

foreseeable and which are not dealt with by this document.
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EN 13732:2022 (E)
4.2 Mechanical hazards
4.2.1 Lids and covers
4.2.1.1 Lids / open tanks

For open tanks, the open and closed positions of the lid shall be stable. The opening and closing

operations shall require an intentional action.

Hinged lids of open tanks shall have a means to keep them in the open position (e.g. spring, hook, bracket,

etc.) or the centre of gravity of the lid shall be at least 15° over the balancing position.

4.2.1.2 Covers / closed tank

For closed tanks having one or more manholes, the locking of the cover of this manhole(s) in the closed

position shall require an intentional action. Furthermore, it shall be clearly and visibly marked, adjacent

to the manhole(s), that (see also 6.2 and 6.3):

— before the closing of the cover, it shall be checked that nobody is in the vessel;

— before entering the tank, it shall be necessary to read the instruction handbook.

For closed tanks, each opening greater than 240 mm (maximum diameter in the case of a circular or

maximum axis in case of an elliptical opening, side length in the case of a square), and which is located

more than 1,35 m above the inner floor shall be provided with a fixed guard requiring a tool to enable

access or shall be fitted with an interlocking device to stop agitation and cleaning functions of the tank. If

a fixed guard is used, it shall comply with EN ISO 14120:2015.

For reasons of hygiene and safety, the design and instruction for use shall avoid the need to enter the tank

in normal operation.
4.2.2 Agitators
Access to agitator attached to the lid of open tanks shall be safeguarded by int
...

SLOVENSKI STANDARD
oSIST prEN 13732:2019
01-november-2019

Stroji za predelavo hrane - Hladilniki za shranjevanje namolzenega mleka - Zahteve

za zmogljivost, varnost in higieno
Food processing machinery - Bulk milk coolers on farms - Requirements for
performance, safety and hygiene
Nahrungsmittelmaschinen - Behältermilchkühlanlagen für Milcherzeugerbetriebe -
Anforderungen an Leistung, Sicherheit und Hygiene

Machines pour les produits alimentaires - Refroidisseurs de lait en vrac à la ferme -

Prescriptions pour les performances, la sécurité et l'hygiène
Ta slovenski standard je istoveten z: prEN 13732
ICS:
65.040.10 Poslopja, naprave in oprema Livestock buildings,
za živino installations and equipment
67.260 Tovarne in oprema za živilsko Plants and equipment for the
industrijo food industry
oSIST prEN 13732:2019 en,fr,de

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

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oSIST prEN 13732:2019
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oSIST prEN 13732:2019
DRAFT
EUROPEAN STANDARD
prEN 13732
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2019
ICS 65.040.10; 67.260 Will supersede EN 13732:2013
English Version
Food processing machinery - Bulk milk coolers on farms -
Requirements for performance, safety and hygiene

Machines pour les produits alimentaires - Nahrungsmittelmaschinen - Behältermilchkühlanlagen

Refroidisseurs de lait en vrac à la ferme - Prescriptions für Milcherzeugerbetriebe - Anforderungen an

pour les performances, la sécurité et l'hygiène Leistung, Sicherheit und Hygiene

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

CEN/TC 153.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

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: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13732:2019 E

worldwide for CEN national Members.
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oSIST prEN 13732:2019
prEN 13732:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................ 10

4 List of significant hazards ......................................................................................................................... 14

5 Safety requirements and/or protective measures — Performance .......................................... 15

5.1 General ............................................................................................................................................................. 15

5.2 Mechanical hazards ..................................................................................................................................... 15

5.3 Electrical hazards ......................................................................................................................................... 15

5.4 Thermal hazards and hazards generated by materials and substances used ....................... 16

5.5 Hygiene ............................................................................................................................................................ 16

5.6 Energy consumption ................................................................................................................................... 22

5.7 Ergonomics ..................................................................................................................................................... 22

5.8 Provisions for maintenance ..................................................................................................................... 23

5.9 Other general requirements for tanks ................................................................................................. 23

5.10 Additional requirements for special tanks – Ice bank tanks ........................................................ 25

6 Verification and tests .................................................................................................................................. 26

7 Information for use ..................................................................................................................................... 29

7.1 General ............................................................................................................................................................. 29

7.2 Warning signs ................................................................................................................................................ 29

7.3 Instruction handbook for the user ......................................................................................................... 30

7.4 Instructions checklist ................................................................................................................................. 31

7.5 Installation and maintenance instructions ........................................................................................ 32

7.6 Dismantling instructions ........................................................................................................................... 33

7.7 Minimum marking ....................................................................................................................................... 33

Annex A (normative) Noise test code (Grade 2 of accuracy) ..................................................................... 35

A.1 General ............................................................................................................................................................. 35

A.2 Emission sound pressure level determination ................................................................................. 35

A.3 Mounting conditions ................................................................................................................................... 35

A.4 Operating conditions .................................................................................................................................. 36

A.5 Measurement uncertainties ..................................................................................................................... 36

A.6 Information to be recorded ...................................................................................................................... 36

A.7 Information to be reported ...................................................................................................................... 37

A.8 Declaration and verification of the noise emission values ........................................................... 37

Annex B (normative) Electrical requirements for bulk milk coolers according to EN 60204-

1:2006 .............................................................................................................................................................. 39

B.1 Safety requirements related to electromagnetic phenomena ..................................................... 39

B.2 Protection against electric shock ........................................................................................................... 39

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B.3 Ambient air temperature ........................................................................................................................... 39

B.4 Supply disconnecting device..................................................................................................................... 39

B.5 Power circuits ................................................................................................................................................ 39

B.6 Overload protection of motors ................................................................................................................ 39

B.7 Control circuit supply .................................................................................................................................. 39

B.8 Emergency stop devices ............................................................................................................................. 40

B.9 Degrees of protection .................................................................................................................................. 40

B.10 Markings of control equipment ............................................................................................................... 40

Annex C (normative) Electrical requirements for bulk milk coolers according to EN 60335-

1:2012 ............................................................................................................................................................... 41

C.1 General ............................................................................................................................................................. 41

C.2 Normal operation (see EN 60335-1:2012, 3.1.9) .............................................................................. 41

C.3 General conditions for the tests (see EN 60335-1:2012, Clause 5) ............................................. 41

C.4 Classification (see EN 60335-1:2012, Clause 6) ................................................................................. 41

C.5 Input and current (see EN 60335-1:2012, Clause 10) ..................................................................... 41

C.6 Heating (see EN 60335-1:2012, Clause 11) ......................................................................................... 41

C.7 Leakage current and electric strength at operating temperature (see EN 60335-

1:2012, Clause 13) ........................................................................................................................................ 42

C.8 Moisture resistance (see of EN 60335-1:2012, Clause 15) ............................................................ 43

C.9 Abnormal operation (see EN 60335-1:2012, Clause 19) ................................................................ 43

C.10 Stability and mechanical hazards (see EN 60335-1:2012, Clause 20) ....................................... 45

C.11 Mechanical strength (see Clause 21 of EN 60335-1:2012) ............................................................ 45

C.12 Supply connection and external flexible cords (see EN 60335-1:2012, Clause 25) ............. 45

C.13 Provision for earthing (see EN 60335-1:2012, Clause 27) ............................................................ 46

C.14 Creepage distances, clearances and solid insulation (see EN 60335-1:2012,

Clause 29) ........................................................................................................................................................ 46

C.15 Resistance to heat and fire (see EN 60335-1:2012, Clause 30) .................................................... 46

Annex D (normative) Test for cooling, thermal insulation, mixing tests .............................................. 47

D.1 General ............................................................................................................................................................. 47

D.2 Performance tests......................................................................................................................................... 48

Annex E (normative) Test for cleanability and cleaning performance .................................................. 64

E.1 Introduction.................................................................................................................................................... 64

E.2 Definitions and steps for the test ............................................................................................................ 64

E.3 Installation of the tank to be tested ....................................................................................................... 65

E.4 Preparation of soiling milk (solution A) .............................................................................................. 65

E.5 Soiling of the tank ......................................................................................................................................... 66

E.6 Automatic cleaning of the tank ................................................................................................................ 66

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prEN 13732:2019 (E)

E.7 Tank rest phase ............................................................................................................................................. 67

E.8 Visual assessment of internal tank surfaces and equipment ....................................................... 67

E.9 Taking method for bacteriological examinations ............................................................................ 67

E.10 Visual assessment of internal tank surfaces and equipment ....................................................... 69

E.11 Bacteriological examination .................................................................................................................... 70

E.12 Chemical examination ................................................................................................................................ 71

E.13 Interpretation of results ............................................................................................................................ 71

Annex F (normative) Sampling methods for milk mixing tests ................................................................ 72

Annex G (normative) Equipment and installation for the tests for cleanability and cleaning

performance required in Annex E .......................................................................................................... 73

G.1 Equipment and installation for the examination dealing with the tank outlet (see

E.3.1.4 and E.9.2) .......................................................................................................................................... 73

G.2 Equipment and installation for the examination dealing with the internal tank

surfaces and equipment ............................................................................................................................ 74

Annex H (normative) Evaluation of stainless steel equivalence .............................................................. 78

H.1 General ............................................................................................................................................................. 78

H.2 Corrosion tests .............................................................................................................................................. 78

Annex I (informative) Example of milk tank service record ..................................................................... 81

Annex J (informative) Estimation and measurement of the energy consumption ............................ 83

J.1 General ............................................................................................................................................................. 83

J.2 Estimation of energy consumption: ....................................................................................................... 83

J.3 Measurement of energy consumption: ................................................................................................. 84

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ..................................................... 88

Bibliography ................................................................................................................................................................. 90

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oSIST prEN 13732:2019
prEN 13732:2019 (E)
European foreword

This document (prEN 13732:2019) has been prepared by Technical Committee CEN/TC 153 “Machinery

intended for use with foodstuffs and feed”, the secretariat of which is held by DIN.

This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13732:2013.
The main changes compared to the previous edition are the following:
a) continuous system of milking added in the scope;
b) updating of normative references;
c) specification of stainless steel equivalence;

d) new informative annex regarding estimation and measurement of energy consumption;

e) technical and editorial modifications.
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oSIST prEN 13732:2019
prEN 13732:2019 (E)
Introduction
This document is a type-C-standard as stated in EN ISO 12100.

The machinery concerned and the extent to which hazards, hazardous situations and events are covered

are indicated in the scope of this document.

When provisions of this type-C-standard are different from those which are stated in type-A- or -B-

standards, the provisions of this type-C-standard take precedence over the provisions of the other

standards, for machines that have been designed and built according to the provisions of this type-C-

standard.
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oSIST prEN 13732:2019
prEN 13732:2019 (E)
1 Scope

1.1 This document specifies requirements for design, performance, safety and hygiene of refrigerated

bulk milk coolers and the related methods of test.

NOTE The informative Annex J gives some elements regarding the estimation and calculation of energy

consumption.

This document deals with all significant hazards, hazardous situations and events relevant to bulk milk

coolers on farm, when they are used as intended and under the conditions of misuse which are reasonably

foreseeable by the manufacturer (see Clause 4).

It applies to refrigerated bulk milk tanks with air-cooled condensing units and automatic control intended

for installation on farms or at milk collection points. It applies to tanks for two milkings (24 h), four

milkings (48 h) and six milkings (72 h), in which the cooling takes place totally (non-pre-cooled milk) or

partially (in case of pre-cooled milk) within the tank. It also applies to tanks in combination with a

continuous system of milking (e.g. milking with robot).
1.2 This document does not cover:
— mobile tanks;
— tanks intended to be tilted for drainage;
— equipment for delivering the milk to the tank;
— equipment for pre-cooling of the milk;
— the hazards due to the use of other energy than electrical energy;

— pressure aspect of vacuum tanks (i.e. tanks where the inner part of the vessel is designed to operate

at a pressure below atmospheric pressure).

1.3 Noise is not considered to be a significant hazard, but relevant for bulk milk coolers. This document

therefore includes information in 7.1 and in Annex A concerning the manufacturer's declaration of the

noise emission level of the cooler.

1.4 This document does not cover the calibration requirements for the tank to be used as a system for

payment purpose.

1.5 This document is not applicable to bulk milk coolers on farm which are manufactured before the

date of its publication as EN.
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.

EN 378-1:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1:

Basic requirements, definitions, classification and selection criteria

EN 378-2:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2:

Design, construction, testing, marking and documentation
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oSIST prEN 13732:2019
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EN 378-3:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3:

Installation site and personal protection

EN 378-4:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4:

Operation, maintenance, repair and recovery

EN 1005-3:2002+A1:2008, Safety of machinery - Human physical performance - Part 3: Recommended

force limits for machinery operation

EN 1672-2:2005+A1:2009, Food processing machinery - Basic concepts - Part 2: Hygiene requirements

EN 10088-2:2014, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of

corrosion resisting steels for general purposes

EN 60204-1:2006, Safety of machinery - Electrical equipment of machines - Part 1: General requirements

(IEC 60204-1:2005, modified)

EN 60335-1:2012, Household and similar electrical appliances - Safety - Part 1: General requirements

(IEC 60335-1:2010, modified)

EN 60335-2-34:2013, Household and similar electrical appliances - Safety - Part 2-34: Particular

requirements for motor-compressors (IEC 60335-2-34:2010)

EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

EN 61310-1:2008, Safety of machinery - Indication, marking and actuation - Part 1: Requirements for

visual, acoustic and tactile signals (IEC 61310-1:2008)

EN ISO 1211:2010, Milk - Determination of fat content - Gravimetric method (Reference method) (ISO

1211:2010)

EN ISO 3651-2:1998, Determination of resistance to intergranular corrosion of stainless steels - Part 2:

Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing

sulfuric acid (ISO 3651-2:1998)

EN ISO 3744:2010, Acoustics - Determination of sound power levels and sound energy levels of noise sources

using sound pressure - Engineering methods for an essentially free field over a reflecting plane (ISO

3744:2010)

EN ISO 4288:1997, Geometrical product specifications (GPS) - Surface texture: Profile method - Rules and

procedures for the assessment of surface texture (ISO 4288:1996)

EN ISO 4871:2009, Acoustics - Declaration and verification of noise emission values of machinery and

equipment (ISO 4871:1996)

EN ISO 11201:2010, Acoustics - Noise emitted by machinery and equipment - Determination of emission

sound pressure levels at a work station and at other specified positions in an essentially free field over a

reflecting plane with negligible environmental corrections (ISO 11201:2010)

1) EN 60529:1991 is impacted by the amendments EN 60529:1991/A1:2000, Degrees of protection provided by

enclosures (IP Code) (IEC 60529:1991/A1:2000) and by EN 60529:1991/A2:2013, Degrees of protection provided by

enclosures (IP Code) (IEC 60529:1991/A2:2013).
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oSIST prEN 13732:2019
prEN 13732:2019 (E)

EN ISO 11202:2010, Acoustics - Noise emitted by machinery and equipment - Determination of emission

sound pressure levels at a work station and at other specified positions applying approximate environmental

corrections (ISO 11202:2010)

EN ISO 11463:2008, Corrosion of metals and alloys - Evaluation of pitting corrosion (ISO 11463:1995)

EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk reduction

(ISO 12100:2010)

EN ISO 13732-1:2008, Ergonomics of the thermal environment - Methods for the assessment of human

responses to contact with surfaces - Part 1: Hot surfaces (ISO 13732-1:2006)

EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 14119:2013, Safety of machinery - Interlocking devices associated with guards - Principles for

design and selection (ISO 14119:2013)

EN ISO 14122-2:2016, Safety of machinery - Permanent means of access to machinery - Part 2: Working

platforms and walkways (ISO 14122-2:2016)

EN ISO 14122-3:2016, Safety of machinery - Permanent means of access to machinery - Part 3: Stairs,

stepladders and guard-rails (ISO 14122-3:2016)
ISO 2852:1993, Stainless steel clamp pipe couplings for the food industry
ISO 2853:1993, Stainless steel threaded couplings for the food industry

ASTM G48:2015, Standard test methods for pitting and crevice corrosion resistance of stainless steels and

related alloys by use of ferric chloride solution
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oSIST prEN 13732:2019
prEN 13732:2019 (E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,

EN 1672-2:2005+A1:2009 and the following 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 https://www.iso.org/obp
3.1
refrigerated bulk milk tank

equipment for refrigeration, and bulk storage of refrigerated raw milk freshly milked

Note 1 to entry: In the following referred to as “tank”.
Note 2 to entry: “milk freshly milked” is milk less than 2 h after being milked.
3.2
open tank

refrigerated bulk milk tank equipped with a lid which in the open position allows manual washing of the

inner vessel
3.3
closed tank
refrigerated bulk milk tank equipped with automatic washing of the inner vessel
Note 1 to entry: A manhole is only used for maintenance.
3.4
pre-cooled milk
milk partially or completely cooled before entering the tank
3.5
automatic control

arrangement by which the equipment functions under normal operating conditions, without requiring

action by the operator
3.6
atmospheric tank

tank in which the inner part of the vessel is designed to operate at atmospheric pressure

3.7
agitator

device to mix the milk to promote heat transfer and to ensure uniform distribution of butterfat

3.8
reference position

position specified by the manufacturer for correct installation and operation of the tank

3.9
maximum volume

volume to which the inner part of the vessel in its reference position and without agitation can be filled

without overflowing (expressed in litres)
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oSIST prEN 13732:2019
prEN 13732:2019 (E)
3.10
rated volume

volume of the maximum permissible filling of the tank under operating conditions as stated by the

manufacturer (expressed in litres)
3.11
direct cooling system

cooling system in which the evaporator of the refrigerating system is in direct thermal contact with the

milk or the inner part of the vessel
3.12
indirect cooling system

cooling system in which the heat is transferred from the milk to the refrigerant through a cooling medium

3.13
batch filling tank
tank intended to be filled by a number of milkings
3.14
ice bank tank

tank with an indirect integrated cooling system in which the cooling medium is water and ice is built on

the evaporator
3.15
milking

a batch of milk (or test water) which is added to the tank and cooled in a specific cooling time

3.16
tank for two milkings

tank intended for cooling and storing milk where the milk is added in two batches each with a volume

equal to 50 % of the tank’s rated capacity
3.17
tank for four milkings
tank intended for cooling and storing milk where the milk
...

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