SIST EN ISO 23771:2015

SLOVENSKI STANDARD
SIST EN ISO 23771:2015
01-junij-2015
7HNVWLOQLVWURML9RGLOR]D]PDQMãDQMHHPLVLMKUXSDSULQDþUWRYDQMXWHNVWLOQLK
VWURMHY,62
Textile machinery - Guide to the design of textile machinery for reduction of the noise
emissions (ISO 23771:2015)
Textilmaschinen und Zubehör - Konstruktive Maßnahmen zur Reduzierung der
Geräuschemissionen von Textilmaschinen (ISO 23771:2015)
Matériel pour l'industrie textile - Guide pour la réduction de l'émission sonore à la
conception des machines textiles (ISO 23771:2015)
Ta slovenski standard je istoveten z: EN ISO 23771:2015
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
59.120.01 Tekstilni stroji na splošno Textile machinery in general
SIST EN ISO 23771:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 23771:2015

---------------------- Page: 2 ----------------------

SIST EN ISO 23771:2015

EUROPEAN STANDARD
EN ISO 23771

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2015
ICS 59.120.01; 17.140.20
English Version
Textile machinery - Guide to the design of textile machinery for
reduction of the noise emissions (ISO 23771:2015)
Matériel pour l'industrie textile - Guide pour la réduction de Textilmaschinen - Konstruktive Maßnahmen zur
l'émission sonore à la conception des machines textiles Reduzierung der Geräuschemissionen von Textilmaschinen
(ISO 23771:2015) (ISO 23771:2015)
This European Standard was approved by CEN on 3 January 2015.

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, 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.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23771:2015 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 23771:2015
EN ISO 23771:2015 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4

2

---------------------- Page: 4 ----------------------

SIST EN ISO 23771:2015
EN ISO 23771:2015 (E)
Foreword
This document (EN ISO 23771:2015) has been prepared by Technical Committee ISO/TC 72 "Textile
machinery and accessories" in collaboration with Technical Committee CEN/TC 214 “Textile machinery and
accessories” the secretariat of which is held by SNV.
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 September 2015, and conflicting national standards shall be
withdrawn at the latest by September 2015.
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 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 Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an 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, 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 the United Kingdom.
Endorsement notice
The text of ISO 23771:2015 has been approved by CEN as EN ISO 23771:2015 without any modification.
3

---------------------- Page: 5 ----------------------

SIST EN ISO 23771:2015
EN ISO 23771:2015 (E)
Annex ZA
(informative)

Relationship between this European Standard and the Essential
Requirements of 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.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
relevant Essential Requirements of that Directive and associated EFTA regulations.

WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.
4

---------------------- Page: 6 ----------------------

SIST EN ISO 23771:2015
INTERNATIONAL ISO
STANDARD 23771
First edition
2015-03-15
Textile machinery — Guide to the
design of textile machinery for
reduction of the noise emissions
Matériel pour l’industrie textile — Guide pour la réduction de
l’émission sonore à la conception des machines textiles
Reference number
ISO 23771:2015(E)
©
ISO 2015

---------------------- Page: 7 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Concept for noise emission control. 2
4.1 Substantial requirements . 2
4.2 Procedure . 2
5 Textile machinery with significant noise hazard . 3
5.1 General . 3
5.2 List of textile machines with significant noise hazard . 3
5.2.1 Spinning and spinning preparatory machines . 3
5.2.2 Non-woven machinery . 3
5.2.3 Yarn processing, cordage, and rope manufacturing machinery . 3
5.2.4 Weaving and knitting preparatory machinery . 4
5.2.5 Fabric manufacturing machinery . 4
5.2.6 Dyeing and finishing machinery . 4
6 Noise sources and noise control measures for particular textile machines .5
6.1 General . 5
7 Determination of compliance with the safety requirements and the efficiency
of measures .17
7.1 Verification on the basis of noise emission values .17
7.2 Verification of noise control.17
7.3 Information for handbook.17
Annex A (informative) Design examples.18
Bibliography .28
© ISO 2015 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 72, Textile machinery and accessories,
Subcommittee SC 8, Safety requirements for textile machinery.
iv © ISO 2015 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

Introduction
This International Standard is a type C standard as stated in ISO 12100. The machinery concerned and
the extent to which hazards are covered are indicated in the scope of this International Standard.
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.
© ISO 2015 – All rights reserved v

---------------------- Page: 11 ----------------------

SIST EN ISO 23771:2015

---------------------- Page: 12 ----------------------

SIST EN ISO 23771:2015
INTERNATIONAL STANDARD ISO 23771:2015(E)
Textile machinery — Guide to the design of textile
machinery for reduction of the noise emissions
1 Scope
This International Standard provides technical information on the design of textile machinery
with reduced noise emissions. Textile machines with a significant noise hazard are defined in
ISO 11111 (all parts).
This International Standard supports the technical designer with the development of low-noise textile
machinery. For this purpose, the significant sources of noise of the individual types of textile machines
and suitable noise control measures are described.
Elements needed for the operation of the textile machine, which are, however, not part of the textile
machine, are not covered by this International Standard (e.g. elements for transportation of process
material, elements for provision of media).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 9902 (all parts), Textile machinery — Noise test code
ISO/TR 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and equipment —
Part 1: Planning
ISO/TR 11688-2, Acoustics — Recommended practice for the design of low-noise machinery and equipment —
Part 2: Introduction to the physics of low-noise design
ISO 11689, Acoustics — Procedure for the comparison of noise-emission data for machinery and equipment
ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100, ISO 9902 (all parts),
and the following apply.
3.1
significant noise hazard
noise hazard corresponding to an A-weighted emission sound pressure level at an operating position
higher than 70 dB
Note 1 to entry: In this case, it is probable that for the machine user under real production conditions
(environmental correction, environment noise, operation of several machines) an emission value of 80 dB(A) is
attained or exceeded.
3.2
significant noise source
noise source which dominates the noise emission generated by a machine
© ISO 2015 – All rights reserved 1

---------------------- Page: 13 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

4 Concept for noise emission control
4.1 Substantial requirements
For reduction of noise emissions from textile machines, the following substantial requirements should
be considered for conceiving and designing textile machinery.
The machine shall be conceived and designed so as to reduce hazards from noise emissions to the
attainable lowest load by taking into consideration the technical progress and the available means for
noise control, primarily at the source.
4.2 Procedure
In order to achieve the substantial aims according to 4.1, the following procedure is recommended.
Step 1: Detection of noise emission by measurement according to ISO 9902 (all parts)
With an emission value of less than or equal to 70 dB(A) at a workstation, no further measures for noise
control are required.
Step 2: Identification of significant noise sources
To identify machine elements and physical processes dominating the noise emissions, the following
methods might be useful:
a) evaluation of revolutions and of the dominating frequencies of the radiated sound;
b) comparative noise measurements with changing the parameters so as to draw conclusions with
regard to significant noise sources;
c) sound intensity measurements to be used for defining the loudest machine ranges;
d) calculation of structure-borne noise (simulation).
Step 3: Specifying and taking noise control measures
Noise control measures should concentrate on significant noise sources to allow good prospect of success
of the measures taken. Thus, a favourable relation between expenditure and benefit might be expected.
The measures shall be taken in the following order:
a) reduction of sound generation;
b) reduction of sound propagation;
c) provision of conditions for installation, maintenance, inspection, repair, spare part specification,
and quality of the used raw materials to be given for continuous low-noise operation of the machine;
d) necessity to wear hearing protectors during operation of the machine.
Step 4: Verification of the success of measures taken
The success of the measure shall be verified by noise measurements according to ISO 9902 (all parts). For
these measurements, the machine should be operating in a mode specified by ISO 9902 (all parts). If the
noise control attained is not sufficient, the procedure is repeated beginning with step 2. The measures
for noise control may be concluded, if
— the A-weighted emission sound pressure level at a workstation is less than or equal to 70 dB or
— the standard attainable according to the state-of-the-art technology of the machine type has been
achieved or is below that level.
2 © ISO 2015 – All rights reserved

---------------------- Page: 14 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

NOTE The state-of-the-art technology represents the technical possibilities given at a certain time. The
state-of-the-art technology also includes its economic feasibility.
Step 5: Documentation
The results of the working steps 1 to 4 shall be recorded in the technical documentation.
The information for the machine user, which is obtained during performing working steps 1 to 4, should
be included in the instruction handbook
5 Textile machinery with significant noise hazard
5.1 General
Textile machinery with significant noise hazard is defined in ISO 11111 (all parts) and listed in detail in
5.2. Clause 6 shows the significant noise sources and the usual measures for noise generation control
and propagation, as well as information for low-noise load during operation, for selected machines.
5.2 List of textile machines with significant noise hazard
5.2.1 Spinning and spinning preparatory machines
Spinning and spinning preparatory machines with significant noise hazard are given in Table 1.
Table 1 — Spinning and spinning preparatory machines with significant noise hazard
Automated blending bale openers
Tearers, willows
Bale breaker, hopper feeder
Moving bin emptiers
Carding machines
Roller and clearer cards
Tape condensers
Converters and stretch breaking converters
Draw frames for short fibres, ribbon lap machine, and lap formers
Gill boxes including “intersecting” and “chain-gill” types
Combers
Speed frames
High-draft finishers
Ring spinning machine
Open-end spinning machine
5.2.2 Non-woven machinery
Non-woven machines with significant noise hazard are needle punching machines.
5.2.3 Yarn processing, cordage, and rope manufacturing machinery
Yarn processing, cordage, and rope manufacturing machines with significant noise hazard are given in
Table 2.
© ISO 2015 – All rights reserved 3

---------------------- Page: 15 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

Table 2 — Yarn processing, cordage, and rope manufacturing machinery
Doubling machines
Twisting machines
Texturing machines
Reeling and winding machines
Ball winding machines
Rope manufacturing machinery
Combined stranding and closing machines
Braiding machines
5.2.4 Weaving and knitting preparatory machinery
Weaving and knitting preparatory machines with significant noise hazard are given in Table 3.
Table 3 — Weaving and knitting preparatory machinery with significant noise hazard
Warping, beaming, and assembly beaming machines
Sizing machines
5.2.5 Fabric manufacturing machinery
Fabric manufacturing machines with significant noise hazard are given in Table 4.
Table 4 — Fabric manufacturing machinery with significant noise hazard
Weaving machines
Needle-type narrow fabric weaving machines
Circular knitting machines
Flatbed knitting machines
Warp knitting machines
Tufting machines
5.2.6 Dyeing and finishing machinery
Dyeing and finishing machines with significant noise hazard are given in Table 5.
Table 5 — Dyeing and finishing machinery with significant noise hazard
Brushing machines
Cropping machines, shearing machines
Singeing machines
Atmospheric dyeing machines and apparatus
High-temperature dyeing machines/apparatus
Jiggers
Stenters, coating, and laminating machines
Raising machines
4 © ISO 2015 – All rights reserved

---------------------- Page: 16 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

6 Noise sources and noise control measures for particular textile machines
6.1 General
A general introduction to the physics of noise generation and noise control, as well as guidelines on
the methodical development at all stages of design of noise control, are given in ISO/TR 11688-1 and
ISO/TR 11688-2.
For a particular selection of textile machinery, Table 6 provides a summary of the significant noise sources,
the measures currently used for reduction of noise generation at source and of noise propagation, and
advice to operators on means to reduce exposure noise. The measures given are only examples of good
practice and not exhaustive and that other measures with the same or higher effectiveness may be used.
Insulating covers found on textile machinery for safety or technological reasons are not referred to as a
particular noise control measure although they might reduce noise generation.
Noise relevant equipment which is not part of the textile machinery is not covered by this clause.
NOTE For design examples for noise control measures, see Annex A.
© ISO 2015 – All rights reserved 5

---------------------- Page: 17 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

6 © ISO 2015 – All rights reserved
Table 6 — Noise sources and noise control measures for particular textile machines
Significant noise Information on the reduction of
Machine type Noise generation control Noise propagation control
sources noise load
6.2  Automated blending a)  blending bale a)  low-noise drive concepts (e.g. — a)  speed data to be complied with
bale openers openers (milling timing belt)
b)  control milling rollers for smooth
roller and its drive)
b)  reduction of masses moved running
b)  fibre transport
c)  aerodynamic optimized flow c)  clean milling rollers, remove flock
and aggregates
geometries (ropes)
involved (pipelines,
ventilators) d)  elastic hanging of milling d)  control the condition of double
roller teeth (unbalance)
e)  straighten or replace bended teeth
f)  control or replace flyer wheel of
ventilator with respect to wear and
damage
g)  clean and control covering slivers
6.3  Tearers, willows a)  main drive — — —
b)  tambour
c)  material trans-
port
6.4  Bale breakers, hopper a)  condenser (if — — —
feeders available)
b)  spiked feed
lattice
c)  opening roller
6.5  Moving bin emptiers a)  feeding (material — — —
transport)
b)  clearing (drive,
lattice, material
transport)

---------------------- Page: 18 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

© ISO 2015 – All rights reserved 7
Table 6 (continued)
Significant noise Information on the reduction of
Machine type Noise generation control Noise propagation control
sources noise load
6.6  Cards a)  flow noise a)  low-noise drive concepts (e.g. — a)  care for leaking parts of the suc-
belt drive) tion system/remove leaking parts
b)  web transfer area
b)  aerodynamic optimized air b)  clean ventilators
c)  clearer roller
flows
c)  correct belt tension
d)  licker-in rolls/
c)  sealed exhaust system
drive
d)  low unbalance of rotating
e)  compressed air
working organs
impacts
e)  high-quality bearing
6.7  Roller and clearer cards a)  drives a)  low-noise drive concepts (e.g. — a)  care for leaking parts of the suc-
belt drive) tion system/remove leaking parts
b)  suction
b)  aerodynamic optimized air b)  clean ventilators
c)  web transfer
flows
c)  correct belt tension
c)  sealed exhaust system
d)  low unbalance of rotating
working organs
e)  high-quality bearing
6.8  Tape condensers a)  rubbing leathers — — —
6.9  Cable cutter- and a)  breaking zone — — —
stretch breaking converters
b)  crimping device
(stuffer box)
c)  drive
d)  blower
6.10  Draw frames for short a)  drive a)  low-noise drive concepts (e.g. — a)  maintenances cycles with lubri-
fibres, ribbon lap machines, tooth belts) cant recommendation
b)  ventilator
and lap formers
b)  determination of suitable b)  regular cleaning of fan wheel
lubricants
6.11  Gillboxes including a)  gill movement — — —
intersecting gillboxes and
chain gill boxes

---------------------- Page: 19 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

8 © ISO 2015 – All rights reserved
Table 6 (continued)
Significant noise Information on the reduction of
Machine type Noise generation control Noise propagation control
sources noise load
6.12  Combers a)  main drive, gear a)  clearance minimization of a)  encapsulated comb area a)  definition of requirements for
noise gears with alternating load (low machine installation
b)  encapsulated gear
tolerances, ground surface)
b)  comb equipment b)  maintenance cycles with lubricant
b)  use of plastic gears where recommendation
c)  nipper move-
technically feasible and useful
ment/closing c)  adjustment instructions for
c)  optimization of movement noise-relevant machine elements (e.g.
d)  intermitting
processes clearance adjustment of gear pairs
detaching/soldering
with alternating load)
roller movement d)  reduction of masses moved
e)  vibrations by e)  clearance reduced bearings
intermitting move- of nipper apparatus, connecting
ments rods and levers
f)  determination of suitable
lubricants
6.13  Speedframes a)  flyer a)  use of timing belts for spindle a)  encapsulation of suction a)  compliance with maintenance and
and flyer drive aggregate cleaning cycles with lubricant recom-
b)  flyer drive
mendation
b)  multi-motor drive b)  guidance of exhaust air
c)  spindle drive
directly into soil duct (short b)  spare part specification (e.g. use
c)  use of balanced flyers
d)  drafting drive way) of balanced flyers)
e)  suction box
6.14 High draft finishers a)  rubber drawing — — —
b)  drafting drive
c)  suction box

---------------------- Page: 20 ----------------------

SIST EN ISO 23771:2015
ISO 23771:2015(E)

© ISO 2015 – All ri
...