EN ISO 9261:2010

SLOVENSKI STANDARD
01-november-2011
Namakalna oprema v kmetijstvu - Razpršilniki in razpršilne cevi - Zahteve in
preskusne metode (ISO 9261:2004)
Agricultural irrigation equipment - Emitters and emitting pipe - Specification and test
methods (ISO 9261:2004)
Landwirtschaftliche Bewässerungsausrüstung - Tropfer und Tropfrohre - Anforderungen
und Prüfmethoden (ISO 9261:2004)
Matériel agricole d'irrigation - Distributeurs et tuyaux-distributeurs - Spécifications et
méthodes d'essai (ISO 9261:2004)
Ta slovenski standard je istoveten z: EN ISO 9261:2010
ICS:
65.060.35 Namakalna in drenažna Irrigation and drainage
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 9261
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2010
ICS 65.060.35
English Version
Agricultural irrigation equipment - Emitters and emitting pipe -
Specification and test methods (ISO 9261:2004)
Matériel agricole d'irrigation - Distributeurs et tuyaux- Landwirtschaftliche Bewässerungsausrüstung - Tropfer und
distributeurs - Spécifications et méthodes d'essai (ISO Tropfrohre - Anforderungen und Prüfmethoden (ISO
9261:2004) 9261:2004)
This European Standard was approved by CEN on 4 January 2010.

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, Croatia, 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
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9261:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 9261:2004 has been prepared by Technical Committee ISO/TC 23 “Tractors and machinery
for agriculture and forestry” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 9261:2010 by Technical Committee CEN/TC 334 “Irrigation techniques” the secretariat of
which is held by AENOR.
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 July 2010, and conflicting national standards shall be withdrawn at the
latest by July 2010.
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.
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, 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 9261:2004 has been approved by CEN as a EN ISO 9261:2010 without any modification.

INTERNATIONAL ISO
STANDARD 9261
Second edition
2004-01-15
Agricultural irrigation equipment —
Emitters and emitting pipe —
Specification and test methods
Matériel agricole d'irrigation — Distributeurs et tuyaux-distributeurs —
Spécifications et méthodes d'essai

Reference number
ISO 9261:2004(E)
©
ISO 2004
ISO 9261:2004(E)
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ii © ISO 2004 – All rights reserved

ISO 9261:2004(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Classification. 4
4.1 Reusability (emitting pipes) . 4
4.2 Type of pressure regulation. 4
4.3 Type of operation at low pressure . 5
4.4 Type of emitter connection to the pipe. 5
4.5 Type of multiple-outlet emitter . 5
5 Designation (emitting pipes). 5
6 Marking. 5
6.1 Emitting pipe . 5
6.2 Emitter. 6
6.3 Fittings . 6
6.4 Packaging of emitting pipes . 6
6.5 Packaging of fittings. 7
7 Construction and materials. 7
7.1 General. 7
7.2 Dimensions (emitting pipe). 7
7.3 Materials. 7
7.4 Fittings (emitting pipe) . 7
7.5 Connection to irrigation lateral (in-line emitter). 8
8 Test specimens and conditions . 8
8.1 Test specimens . 8
8.2 Order of tests. 8
8.3 Test conditions. 8
8.4 Accuracy of measuring devices . 8
9 Test methods and requirements . 8
9.1 Uniformity of flow rate. 8
9.2 Flow rate as a function of inlet pressure. 9
9.3 Determination of emitter/emitting unit exponent. 10
9.4 Dimensions. 11
9.5 Resistance to hydraulic pressure . 12
9.6 Resistance to tension (emitting pipe). 12
9.7 Resistance to pull-out of joints between fittings and polyethylene reusable emitting pipes. 13
9.8 Emitter pull-out. 13
9.9 Watertightness of the emitter-pipe assembly . 14
9.10 Resistance of polyethylene (PE) emitting pipe to environmental stress-cracking. 15
10 Data supplied by manufacturer . 15
Bibliography . 16

ISO 9261:2004(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 9261 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
This second edition of ISO 9261 cancels and replaces ISO 9261:1991 and ISO 9260:1991, of which it
constitutes a technical revision.
iv © ISO 2004 – All rights reserved

INTERNATIONAL STANDARD ISO 9261:2004(E)

Agricultural irrigation equipment — Emitters and emitting
pipe — Specification and test methods
1 Scope
This International Standard gives mechanical and functional requirements for agricultural irrigation emitters
and emitting pipes, and, where applicable, their fittings, and provides methods for testing conformity with such
requirements. It also specifies the data to be supplied by the manufacturer to permit correct information,
installation and operation in the field.
It is applicable to emitters, emitting and dripping (trickling) pipes, hoses, including collapsible hoses (“tapes”)
and tubing of which the emitting units form an integral part, to emitters and emitting units with or without
pressure regulation and with flow rates not exceeding 24 l/h per outlet (except during flushing), and to fittings
dedicated to the connection of emitting pipes, hoses and tubing. It is not applicable to porous pipe (pipe that is
porous along its entire length), nor does it cover the performance of pipes as regards clogging.
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.
ISO 3501, Assembled joints between fittings and polyethylene (PE) pressure pipes  Test of resistance to
1)
pull ou t
2)
ISO 8796:— , Polyethylene PE 32 and PE 40 pipes for irrigation laterals — Susceptibility to environmental
stress cracking induced by insert-type fittings — Test method and specification
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
emitter
dripper
device fitted to an irrigation lateral and intended to discharge water in the form of drops or continuous flow at
flow rates not exceeding 24 l/h except during flushing
3.2
in-line emitter
emitter intended for installation between two lengths of pipe in an irrigation lateral

1) Requirements for connections of insert-type fittings are to be included in a future edition.
2) To be published. (Revision of ISO 8796:1989)
ISO 9261:2004(E)
3.3
on-line emitter
emitter intended for installation in the wall of an irrigation lateral, either directly or indirectly by means such as
tubing
3.4
multiple-outlet emitter
emitter in which the output flow is divided and directed to several distinctly different locations
3.5
multiple emitter
multiple-outlet emitter in which every outlet is a secondary emitter with its own flow rate
m
NOTE The pressure relationship (q = kp ), and the flow rate of each outlet is not generally dependent on the flow rate
of other emitters.
3.6
emitting pipe
continuous pipe, hose or tubing, including collapsible hose (“tape”) with perforations or other hydraulic devices
formed or integrated in the pipe, hose or tubing during production and intended to discharge water in the form
of drops or continuous flow, at flow rates not exceeding 24 l/h except during flushing
3.7
regulated emitter/emitting pipe
pressure compensating emitter/emitting pipe
emitter/emitting pipe which maintains a relatively constant flow rate at varying water pressures at the
emitter/emitting pipe inlet within the limits specified by the manufacturer
3.8
regular emitter/emitting pipe
emitter/emitting pipe whose flow rate is different from zero when the inlet pressure is different from zero
3.9
non-leakage emitter/emitting pipe
emitter/emitting pipe whose flow is zero whenever the pressure at the inlet of the emitter/emitting pipe is lower
than a value (other than zero) declared by the manufacturer
3.10
unregulated emitter/emitting pipe
non-pressure compensating emitter/emitting pipe
emitter/emitting pipe whose flow rate varies with inlet water pressure
3.11
flow rate
emission rate of an emitter or an emitting pipe
3.12
minimum working pressure
lowest working pressure at the inlet to an emitter/emitting pipe recommended by the manufacturer to ensure
proper operation of the emitter/emitting pipe
3.13
maximum working pressure
highest water pressure at the inlet to an emitter/emitting pipe recommended by the manufacturer to ensure
proper operation of the emitter/emitting pipe
3.14
non-reusable emitting pipe
emitting pipe not intended for removal from the field and reinstallation
2 © ISO 2004 – All rights reserved

ISO 9261:2004(E)
3.15
reusable emitting pipe
emitting pipe designed for removal from the field and reinstallation with proper handling from one season to
another or under other circumstances
3.16
emitting unit
section of an emitting pipe, including all its hydraulic devices formed or integrated in the pipe during
production and all of the emitter inlets, repeated at intervals, from which water is discharged to one clearly
distinguishable location
3.17
unit emitting pipe
length of emitting pipe containing one emitting unit
3.18
clamping band
ring-like or band-like device used for obtaining a watertight joint between an emitting pipe and a fitting
3.19
fitting
connecting device suitable for attachment to an emitting pipe with or without a clamping band
3.20
inlet fitting
fitting having one end suitable for connection to a standard irrigation pipe or appliance and the other end or
ends suitable for connection to an emitting pipe
3.21
in-line fitting
fitting having both ends suitable for connection to an emitting pipe
3.22
nominal diameter
numerical designation used to refer to the size of an emitting pipe, approximately equal to the outside
diameter of the emitting pipe
3.23
nominal size
numerical designation used to refer to the size of an in-line emitter, approximately equal to the inside diameter
of an irrigation lateral pipe to which it is intended to be connected
3.24
nominal test pressure
p
n
reference pressure, to be used for test purposes, of 100 kPa at the inlet of an unregulated emitter/emitting
unit, or any other pressure as designated in manufacturer’s publications
3.25
nominal flow rate
q
n
〈unregulated emitter/emitting pipe〉 flow rate, expressed in litres per hour, of an emitter/emitting unit operating
at the nominal test pressure and at a water temperature of 23 ± 3 °C, as specified by the manufacturer
3.26
nominal flow rate
q
n
〈regulated emitter/emitting pipe〉 flow rate, expressed in litres per hour, of an emitter/emitting unit operating in
the range of regulation and at a water temperature of 23 ± 3 °C, as specified by the manufacturer
ISO 9261:2004(E)
3.27
nominal flow rate
q
n
〈multiple outlet emitter〉 flow rate of each outlet, as specified in 3.25 and 3.26, accordingly
3.28
range of working pressures
all water pressures at the emitter/emitting unit inlet between and including the minimum working pressure,
p , and the maximum working pressure, p , recommended by the manufacturer to ensure proper
min max
operation
3.29
range of regulation
〈regulated emitter/emitting pipe〉 all water pressures at the emitter/emitting unit inlet in which each
emitter/emitting unit is expected to discharge the nominal flow rate
3.30
emitter/emitting unit exponent
m
numerical value that defines the exponential relationship between emission rate and pressure
m
NOTE q ≈ kp : for an exponent (m) of 0, the emission rate does not vary with pressure; for an exponent of 1, the
emission rate varies linearly with pressure.
3.31
collapsible hose
“tape”
emitting pipe whose structure causes its cross-section (which is generally round or rounded when the
pressure at the inlet of the emitting pipe is within the range of working pressures recommended by the
manufacturer) to alter itself when the pressure is zero, generally because of a small wall thickness or because
of the flexible nature of the material from which the emitting pipe is made
3.32
spacing [of emitting units]
distance between two successive emitting units along an emitting pipe
4 Classification
Emitters/emitting pipes are classified according to the following criteria (see 4.1 to 4.5).
4.1 Reusability (emitting pipes)
Two categories of duration of use are classified:
4.1.1 non-reusable emitting pipes;
4.1.2 reusable emitting pipes.
4.2 Type of pressure regulation
Two categories of operation are classified:
4.2.1 unregulated emitters/emitting pipes;
4.2.2 regulated emitters/emitting pipes.
4 © ISO 2004 – All rights reserved

ISO 9261:2004(E)
4.3 Type of operation at low pressure
Two categories of operation at low pressure are classified:
4.3.1 regular
4.3.2 non-leakage
4.4 Type of emitter connection to the pipe
Three types of emitter connection are classified:
4.4.1 on-line (emitter)
4.4.2 in-line (emitter)
4.4.3 formed or integrated in the pipe (emitting pipe)
4.5 Type of multiple-outlet emitter
4.5.1 multiple emitter
4.5.2 regular multiple-out
...