SIST EN ISO 9261:2011
(Main)Agricultural irrigation equipment - Emitters and emitting pipe - Specification and test methods (ISO 9261:2004)
Agricultural irrigation equipment - Emitters and emitting pipe - Specification and test methods (ISO 9261:2004)
ISO 9261:2004 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), as well as 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.
Landwirtschaftliche Bewässerungsausrüstung - Tropfer und Tropfrohre - Anforderungen und Prüfmethoden (ISO 9261:2004)
Die vorliegende Internationale Norm legt die mechanischen und funktionellen Anforderungen an landwirt-schaftliche Tropfer und Tropfrohre und gegebenenfalls derer Fittings fest, und gibt Verfahren für die Prüfung der Konformität mit diesen Anforderungen an. Sie legt ebenso die vom Hersteller bereitzustellenden Angaben fest, die eine ordnungsgemäße Information, den Aufbau und die Handhabung auf dem Feld ermöglichen.
Sie ist geeignet für Tropfer, Tropfrohre (Rieselrohre), Schläuche, einschließlich flacher, zusammenrollbarer Schläuche („Tape-Schläuche“) und Rohrleitungen, bei denen die Tropfeinheiten einen integralen Bestandteil darstellen, für Tropfer und Tropfeinheiten mit oder ohne Druckregelung und mit Durchflussraten nicht über 24 l/h je Auslass (außer während des Spülens), und für Fittings, die für den Anschluss der Tropfrohre, Schläuche und Rohrleitungen bestimmt sind. Sie ist nicht für ein durchlässiges Rohr (Rohr, das über seine ganze Länge porös ist) geeignet, sie umfasst auch nicht die Leistungsfähigkeit der Rohre in Bezug auf Zusetzen (Verstopfen).
Matériel agricole d'irrigation - Distributeurs et tuyaux-distributeurs - Spécifications et méthodes d'essai (ISO 9261:2004)
L'ISO 9261:2004 fournit les exigences mécaniques et de fonctionnement des distributeurs et des tuyaux-distributeurs utilisés en irrigation agricole et, s'il y a lieu, de leurs raccords, et indique les méthodes d'essai de conformité à ces exigences. Elle spécifie également les données que le fabricant doit fournir pour permettre une information, une installation et un fonctionnement corrects sur le terrain.
Elle est applicable aux distributeurs, aux tuyaux-distributeurs et tuyaux d'égouttage (de ruissellement), aux tuyaux flexibles, y compris les tuyaux flexibles extensibles («rubans») et les tubes dont les unités de distribution font partie intégrante, aux distributeurs et aux unités de distribution avec ou sans régulation de pression et avec des débits ne dépassant pas 24 l/h par sortie (sauf pendant la purge), ainsi qu'aux raccords utilisés pour raccorder les tuyaux-distributeurs, les tuyaux flexibles et les tubes. Elle n'est pas applicable aux tuyaux poreux (tuyaux qui sont poreux sur toute leur longueur), et ne traite pas non plus de la performance des tuyaux vis-à-vis du colmatage.
Namakalna oprema v kmetijstvu - Razpršilniki in razpršilne cevi - Zahteve in preskusne metode (ISO 9261:2004)
ISO 9261:2004 podaja mehanske in funkcionalne zahteve za namakalne razpršilnike in razpršilne cevi v kmetijstvu ter, kjer je primerno, pripadajočo opremo in zagotavlja metode za preskušanje skladnosti s takimi zahtevami. Prav tako določa podatke, ki jih mora zagotoviti proizvajalec, da omogoči pravilne informacije, namestitev in delovanje na terenu. Uporablja se za razpršilnike, razpršilne cevi in cevi za kapljanje, vključno z zložljivimi cevmi (»trakovi«) in cevnimi materiali, katerih sestavni del tvorijo razpršilne enote, do razpršilnikov in razpršilnih enot z regulacijo pritiska ali brez nje ter s pretoki ne več kot 24 l/h na izhod (razen med izpiranjem) in opremo za povezavo razpršilnih cevi in cevnih materialov. Ne uporablja se za porozno cev (cev, ki je porozna po celotni dolžini), ter ne zajema učinkovitosti cevi kar zadeva zamašitev.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 9261:2011
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
SIST EN ISO 9261:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 9261:2011
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SIST EN ISO 9261:2011
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.
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SIST EN ISO 9261:2011
EN ISO 9261:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 9261:2011
EN ISO 9261:2010 (E)
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.
3
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SIST EN ISO 9261:2011
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SIST EN ISO 9261:2011
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
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SIST EN ISO 9261:2011
ISO 9261:2004(E)
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Published in Switzerland
ii © ISO 2004 – All rights reserved
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SIST EN ISO 9261:2011
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 2004 – All rights reserved iii
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SIST EN ISO 9261:2011
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
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SIST EN ISO 9261:2011
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)
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SIST EN ISO 9261:2011
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
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SIST EN ISO 9261:2011
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
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SIST EN ISO 9261:2011
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.
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SIST EN ISO 9261:2011
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-outlet emitter.
5 Designation (emitting pipes)
Emitting pipes shall be designated by
a) the words “emitting pipe”,
b) reference to this International Standard,
c) the nominal diameter, in millimetres,
d) nominal flow rate, in litres per hour,
e) maximum working pressure, in multiples of 100 kPa units.
EXAMPLE An emitting pipe complying with this International Standard, of 16-mm nominal diameter, 2 l/h nominal
flow rate, intended for operation at working pressures up to a maximum of 120 kPa is designated as follows:
Emitting pipe ISO 9261 16 - 2 - 1,2
6 Marking
6.1 Emitting pipe
Each emitting pipe shall bear clear and permanent markings including the following details:
a) name of manufacturer or registered trademark;
b) mark for identification of year of manufacture;
c) designation according to Clause 5;
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SIST EN ISO 9261:2011
ISO 9261:2004(E)
d) arrow indicating direction of flow (if it affects operation of the emitting pipe);
e) spacing of emitting units, in centimetres.
These details shall be marked at intervals not exceeding 5 m.
Notwithstanding the above, the marking on non-reusable emitting pipes (Class 4.1.1) does not have to be
permanent but shall appear on the package in accordance with the marking requirements of 6.4.
6.2 Emitter
Each emitter shall bear clear and permanent markings including the following details:
a) name of the manufacturer or registered trademark;
b) nominal flow rate, in litres per hour;
c) nominal size (in-line emitters), in millimetres;
d) arrow indicating direction of flow (if important for proper operation).
Nominal flow rate [see b) of this subclause] may be indicated by the colour of any part of the emitter, or by any
other method described in the manufacturer’s literature.
6.3 Fittings
Each emitting pipe fitting shall bear a clear and permanent marking of the name of the manufacturer or
registered trademark.
6.4 Packaging of emitting pipes
When emitting pipes are supplied in coils, each coil shall carry an attached tag bearing the following clear,
legible and permanent information:
a) name of manufacturer or registered trademark;
b) designation according to Clause 5;
c) nominal diameter of emitting pipe, in millimetres;
d) catalogue number of emitting pipe, or other catalogue identification;
e) classification according to 4.1, 4.2 and 4.3;
f) length of emitting pipe in coil, in metres;
g) year of production and manufacturing lot;
h) nominal flow rate of unit emitting pipe, in litres per hour, and nominal test pressure (unregulated emitting
pipe), p ;
n
i) spacing of emitting units, in metres.
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SIST EN ISO 9261:2011
ISO 9261:2004(E)
6.5 Packaging of fittings
Fittings shall be supplied in package form, each bearing the following clear, legible and permanent
information:
a) name of manufacturer;
b) catalogue number;
c) nominal diameter of emitting pipe and, if applicable, nominal diameter of the irrigation lateral or the
nominal size of the thread for which the fittings are intended;
d) year of manufacture and manufacturing lot.
7 Construction and materials
7.1 General
The emitter/emitting pipe, its parts and fittings shall have no manufacturing defects that could impair
performance.
The construction of the emitter/emitting pipe and its fittings shall permit their easy connection, with or without
clamping bands, whether the connection is made manually or by means of suitable tools supplied by the
manufacturer.
7.2 Dimensions (emitting pipe)
7.2.1 The manufacturer shall specify the outside diameter, inside diameter and wall thickness of the
product, in millimetres, and the actual dimensions of the product shall comply with those declared by the
manufacturer in accordance with 9.4.2.
7.2.2 The dimensions of the connecting fittings shall fit the dimensions of the emitting pipe, to ensure easy
and reliable connection.
7.3 Materials
The material used in the manufacture of emitters/emitting pipes and their fittings shall be resistant to fertilizers
and other chemicals commonly employed in agricultural irrigation and shall be suitable for use with water at
temperatures up to 60 °C and at operating pressures designated by the manufacturer.
The materials shall, insofar as possible, not support the growth of algae and bacteria. The parts that are
exposed to light shall be opaque and protected against UV degradation.
7.4 Fittings (emitting pipe)
The manufacturer shall be able to supply, for each type and size of emitting pipe, fittings suitable in size and
shape to make secure connections to the emitting pipe.
The jointing, made with or without the use of clamping bands, shall be of sufficient strength to withstand the
full range of working pressures.
Clamping components, such as bands and screws, shall be of non-corroding materials or of materials
protected against corrosion.
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SIST EN ISO 9261:2011
ISO 9261:2004(E)
7.5 Connection to irrigation lateral (in-line emitter)
When polyethylene (PE) lateral is used, in-line emitter ends shall not increase the diameter of the
polyethylene pipe by more than 20 %.
NOTE Dimensions of the polyethylene pipe laterals are specified in ISO 8779.
8 Test specimens and conditions
8.1 Test specimens
The sample shall include 25 specimens taken at random from a lot of at least 500 emitters/emitting units. A
specimen is composed of either one emitter or one non-truncated emitting unit from the emitting pipe. The
number of test specimens (emitters/emitting units) required for each test is indic
...
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