EN ISO 20361:2009

SLOVENSKI STANDARD
01-junij-2009
1DGRPHãþD
SIST EN 12639:2001
SIST EN 12639:2001/AC:2002
SIST EN 12639:2001/AC:2004
ýUSDONH]DWHNRþLQHLQþUSDOQLDJUHJDWL0HUMHQMHKUXSD5D]UHGDWRþQRVWLLQ
,62
Liquid pumps and pump units - Noise test code - Grades 2 and 3 of accuracy (ISO
20361:2007)
Pompes et groupes motopompes pour liquides - Code d'essai acoustique - Classes de
précision 2 et 3 (ISO 20361:2007)
Ta slovenski standard je istoveten z: EN ISO 20361:2009
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
23.080 ýUSDONH Pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 20361
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2009
ICS 17.140.20; 23.080 Supersedes EN 12639:2000
English Version
Liquid pumps and pump units - Noise test code - Grades 2 and
3 of accuracy (ISO 20361:2007)
Pompes et groupes motopompes pour liquides - Code
d'essai acoustique - Classes de précision 2 et 3 (ISO
20361:2007)
This European Standard was approved by CEN on 10 April 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20361:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex ZA (normative) Normative references to international publications with their following
European publications .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EC Directive of EU Directive 98/37/CE .6
Annex ZC (informative) Relationship between this European Standard and the Essential
Requirements of Directive EU Directive 2006/42/EC .7

Foreword
The text of ISO 20361:2007 has been prepared by Technical Committee ISO/TC 115 “Pumps” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 20361:2009 by
Technical Committee CEN/TC 197 “Pumps” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2009, and conflicting national standards shall be withdrawn at
the latest by December 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12639:2000.
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 EC Directives.
For relationship with EC Directives, see informative Annexes ZB and ZC, which are integral part of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 20361:2007 has been approved by CEN as a EN ISO 20361:2009 without any modification.
NOTE Normative references to International Standards are listed in annex ZA (normative).

Annex ZA
(normative)
Normative references to international publications
with their following European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
Standard Year Title EN Year
1)
1994 Acoustics — Determination of sound power levels of 1995 EN ISO 3743-1
ISO 3743-1
noise sources — Engineering methods for small,
movable sources in reverberant fields — Part 1:
Comparison method in hard-walled test rooms
ISO 3743-2 1994 Acoustics — Determination of sound power levels of 1996 EN ISO 3743-1
noise sources using sound pressure — Engineering
methods for small, movable sources in reverberant
fields — Part 2: Methods for special reverberation test
rooms
2)
1994 Acoustics — Determination of sound power levels of 1995 EN ISO 3744
ISO 3744
noise sources using sound pressure — Engineering
method in an essentially free field over a reflecting
plane
3)
1995 Acoustics — Determination of sound power levels of 1995 EN ISO 3746
ISO 3746
noise sources using sound pressure — Survey method
using an enveloping measurement surface over a
reflecting plane
ISO 4871 1996 Acoustics — Declaration and verification of noise 1996 EN ISO 4871
emission values of machinery and equipment
ISO 9614-1 1993 Acoustics — Determination of sound power levels of 1995 EN ISO 9614-1
noise sources using sound intensity — Part 1:
Measurement at discrete points
ISO 9614-2 1996 Acoustics — Determination of sound power levels of 1996 EN ISO 9614-2
noise sources using sound intensity — Part 2:
Measurement by scanning
1) To be published (Revision of ISO 3743-1:1994)
2) To be published (Revision of ISO 3744:1994)
3) To be published (Revision of ISO 3746:1995)
Standard Year Title EN Year
ISO 11203 1995 Acoustics — Noise emitted by machinery and 1995 EN ISO 11203
equipment — Determination of emission sound
pressure levels at the work station and at other
specified positions from the sound power level
ISO 12100-1 2003 Safety of machinery — Basic concepts, general 2003 EN ISO 12100-1
principles for design — Part 1 : Basic terminology,
methodology
ISO 12100-2 2003 Safety of machinery — Basic concepts, general 2003 EN ISO 12100-2
principles for design — Part 2 : Technical principles
(EN ISO 12100-2)
ISO 17769 2008 Liquid pumps – General terms and installation – 2000 EN 12723
Definitions, quantities, letter symbols and units

Annex ZB
(informative)
Relationship between this European Standard and the Essential Requirements of
EC Directive of EU Directive 98/37/CE
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association] to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC, amended by 98/79/EC
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the clauses of this
standard given in table ZB confers, within the limits of the scope of this standard, a presumption of conformity
with the corresponding Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EC Directives may be applicable to the product(s) falling within
the scope of this standard.
Annex ZC
(informative)
Relationship between this European Standard and the Essential Requirements of
Directive EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the clauses of this
standard given in table ZC confers, within the limits of the scope of this standard, a presumption of conformity
with the corresponding Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EC Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 20361
First edition
2007-02-01
Corrected version
2007-04-01
Liquid pumps and pump units — Noise
test code — Grades 2 and 3 of accuracy
Pompes et groupes motopompes pour liquides — Code d'essai
acoustique — Classes de précision 2 et 3

Reference number
ISO 20361:2007(E)
©
ISO 2007
ISO 20361:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 20361:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Pump family and pump configuration . 2
5 Sound power level determination . 3
6 Emission sound pressure level determination. 10
7 Installation and mounting conditions. 11
8 Operating conditions during noise measurement . 12
9 Information to be recorded . 12
10 Declaration and verification of noise emission values. 13
Annex A (normative) Pump alone — Measurement surface. 14
Annex B (normative) Pump units — Microphone positions for sound pressure level measurement
on the measurement surface for different pump types and sizes. 15

ISO 20361:2007(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20361 was prepared by Technical Committee ISO/TC 115, Pumps.
This corrected version of ISO 20361:2007 incorporates the removal of “FDIS” from the footer on the cover
page and from the header on succeeding pages.
iv © ISO 2007 – All rights reserved

ISO 20361:2007(E)
Introduction
The noise emitted by a pump unit can be radiated by the casing of the pump, the driving system (e.g. motor,
gear box, coupling), the piping system and all the connected structures.
On site, the perceived noise can be significantly increased by reverberation effects or by the radiation of
extraneous sources.
Depending on the type of pump it may be useful to know
a) the noise of the pumping system (including piping);
b) the noise of the pump unit, including the driver and the transmission elements but excluding the noise of
the piping system;
c) the noise emitted by the pump alone, excluding the noise from the driver, transmission elements and the
pipings;
d) the noise emitted by each of those elements in respect to a given requirement or in view of an efficient
sound proofing of the installation.
This International Standard describes methods for the determination of the noise emitted by a pump unit
[case b)] or a pump alone [case c)]. Noise emission is expressed in terms of the sound power level of the
machine and the emission sound pressure level at the relevant work station (see 6.2).
This International Standard is intended to enable the manufacturer to
⎯ show the effectiveness of noise reduction,
⎯ declare the noise emission levels.
This International Standard is a type C standard as stated in ISO 12100-1 and ISO 12100-2.
When provisions of this type C standard are different from those which are stated in A or B standards, the
provisions of this type C standard take precedence.
The machinery concerned and the extent to which noise is covered are indicated in the scope of this
International Standard.
INTERNATIONAL STANDARD ISO 20361:2007(E)

Liquid pumps and pump units — Noise test code — Grades 2
and 3 of accuracy
1 Scope
This International Standard specifies all the information necessary to carry out efficiently and under
standardized conditions the determination, declaration and verification of the airborne noise emission of liquid
pumps or pump units (see 4.1). It specifies the noise measurement methods and the operating and mounting
conditions that shall be used for the test.
Noise emission characteristics include emission sound pressure levels at specified positions and the sound
power level. The determination of these quantities is necessary for
⎯ declaring the noise emission values,
⎯ purpose of noise control at source at the design stage.
NOTE 1 The determination of these quantities is also necessary for comparing the noise emitted by liquid pumps on the
market.
The use of this International Standard ensures the reproducibility of the determination of the airborne noise-
emission characteristics within specified limits determined by the grade of accuracy of the basic airborne noise
measurement method used. Noise measurement methods according to this International Standard are
engineering methods (grade 2) and survey methods (grade 3).
This International Standard does not deal with the characterization of the structure-borne sound and liquid-
borne noise generated by liquid pumps.
NOTE 2 This International Standard is intended to complement EN 809, Pumps and pump units for liquids — Common
safety requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
1)
ISO 3743-1 , Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Engineering method for small, movable sources in reverberant fields — Part 1:
Comparison method for a hard-walled test room
ISO 3743-2, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering methods for small, movable sources in reverberant fields — Part 2: Methods for special
reverberation test rooms
2)
ISO 3744 , Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering method in an essentially free field over a reflecting plane

1) To be published. (Revision of ISO 3743-1:1994)
2) To be published. (Revision of ISO 3744:1994)
ISO 20361:2007(E)
3)
ISO 3746 , Acoustics — Determination of sound power levels of noise sources using sound pressure —
Survey method using an enveloping measurement surface over a reflecting plane
ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment
ISO/TR 7849, Acoustics — Estimation of airborne noise emitted by machinery using vibration measurement
ISO 9614-1, Acoustics — Determination of sound power levels of noise sources using sound intensity —
Part 1: Measurement at discrete points
ISO 9614-2:1996, Acoustics — Determination of sound power levels of noise sources using sound intensity —
Part 2: Measurement by scanning
ISO 11203:1995, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at the work station and at other specified positions from the sound power level
ISO 12100-1, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology
ISO 12100-2, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical
principles
ISO 17769, Liquid pumps — General terms and installation — Definitions, quantities, letter symbols and units
3 Terms and definitions
For the purposes of this document, the definitions given in ISO 17769 and the following apply.
3.1
pump
equipment that is defined as being terminated by its inlet and outlet branches as well as in general its shaft
ends
3.2
pump unit
equipment that is comprised of the pump as described in 3.1 and its driver (e.g. electric motor, steam turbine)

including transmission elements (e.g. coupling, gear), baseplates and any auxiliary equipment supplied with
the pump
4 Pump family and pump configuration
4.1 Pumps covered by this International Standard comprise liquid pumps of the rotodynamic and positive
displacement, rotary and reciprocating types.
4.2 This International Standard provides two possibilities of measurement, either pump alone (see Table 1),
or pump units (see Table 2). In these two cases, the pumps shall be installed
⎯ on site (see 7.2.2), or
⎯ on shop test stand (see 7.2.3), or
⎯ in a specific facility intended for acoustic measurement (see 7.2.4).

3) To be published. (Revision of ISO 3746:1995)
2 © ISO 2007
...