SIST EN 14267:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Namakalna tehnika – Hidranti za namakanjeBewässerungsverfahren - Hydranten für BewässerungswasserTechniques d'irrigation - Bornes d'irrigationIrrigation techniques - Irrigation hydrants65.060.35Namakalna in drenažna opremaIrrigation and drainage equipmentICS:Ta slovenski standard je istoveten z:EN 14267:2004SIST EN 14267:2004en01-november-2004SIST EN 14267:2004SLOVENSKI
STANDARD



SIST EN 14267:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14267July 2004ICS 65.060.35English versionIrrigation techniques - Irrigation hydrantsTechniques d'irrigation - Bornes d'irrigationBewässerungsverfahren - Hydranten fürBewässerungswasserThis European Standard was approved by CEN on 6 May 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14267:2004: ESIST EN 14267:2004



EN 14267:2004 (E) 2 Contents page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Classification.9 4.1 By function.9 4.2 By dimension.9 4.3 By PN.9 4.4 By flow-rate limiter class.9 5 Quality of irrigation waters.9 5.1 General.9 5.2 Water quality 1a.10 5.3 Water quality 1b.10 5.4 Water quality 1c.10 5.5 Water quality 2.10 6 Requirements.11 6.1 Dimensional hydrant specifications.11 6.2 Requirements for total head loss in the hydrant.11 6.3 Conception requirement.12 7 Connection to the user network.18 7.1 Connection piece.18 7.2 Closure of the connection piece.18 7.3 Decompression valve.18 7.4 Protection device.18 8 Testing and inspection methods.18 8.1 Resistance to internal pressure of casing and all components subjected to pressure.18 8.2 Tightness and hydraulic or air characteristics.19 8.3 Verification of the manoeuvring torque.19 8.4 Measurement of total head loss.20 8.5 Pressure ram test.21 8.6 Performance of the pressure regulator.25 8.7 Flow-rate limiter performances.26 8.8 Performance of meters.27 SIST EN 14267:2004



EN 14267:2004 (E) 3 8.9 Measurement and test apparatus.31 8.10 Endurance test of the stopper device.31 9 Marking.34 9.1 General.34 9.2 Of meters.34 9.3 Of hydrant bodies.35 9.4 Of outlets.35 10 Designation.35 Annex A (informative)
Irrigation hydrant - Example of technical data sheet (responsibility of the manufacturer).36 A.1 Identification of the hydrant.36 A.2 Hydrant body.36 A.3 Outlets.37 A.4 Particular functions.37 A.5 Methods of use.38 Bibliography.39
SIST EN 14267:2004



EN 14267:2004 (E) 4 Foreword This document (EN 14267:2004) has been prepared 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 January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom
SIST EN 14267:2004



EN 14267:2004 (E) 5 1 Scope This document applies to irrigation hydrants intended to supply equipment for use in water distribution irrigation networks. The range of PN is that defined in EN 1074-1, i.e.: PN 10, PN 16, PN 25 and limited to PN 25. 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. EN 19, Industrial valves – Marking of metallic valves. EN 1074-1:2000, Valves for water supply – Fitness for purpose requirements and appropriate verification tests – Part 1: General requirements. EN 1092-1, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges. EN 1092-2, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 2: Cast iron flanges. EN 1267, Valves – Test of flow resistance using water as test fluid. EN 1503-3, Valves –Materials for bodies, bonnets and covers – Part 3: Cast irons specified in European Standards. EN 1561, Founding – Grey cast irons. EN 1563, Founding – Spheroidal graphite cast iron. EN 12266-1:2003, Industrial valves - Testing of valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements
EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads – Part 1: Dimensions, tolerances and designation (ISO 228-1:2000). EN ISO 4628-1:2003, Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 1: General introduction and designation system (ISO 4628-1:2003). ISO 4064-1, Measurement of water flow in closed conduits – Meters for cold potable water – Part 1: Specifications. ISO 4064-3, Measurement of water flow in closed conduits – Meters for cold potable water – Part 3: Test methods and equipment. ISO 4200:1991, Plain end steel tubes, welded and seamless – General tables of dimensions and masses per unit length. ISO 9227, Corrosion tests in artificial atmospheres – Salt spray tests. ISO 9635:1990, Irrigation equipment – Hydraulically operated irrigation valves. SIST EN 14267:2004



EN 14267:2004 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1
irrigation hydrant valve apparatus intended to ensure the delivery of irrigation water supplied to a user network from a pressurised distribution network which is generally subterranean buried The irrigation hydrant consists of the body of the hydrant and one or more distribution outlets fitted to it. It is characterised by the diameter of the body and by the diameters of the outlets (see Figure 1). It features at least a "shut-off" function and a "metering" function. It may also integrate the "flow-rate limitation" and "pressure regulation" functions. NOTE Throughout the rest of this document, "irrigation hydrant" is also referred to as the hydrant. 3.2 pressurised water distribution network for irrigation collective network which is generally positioned underground which supplies irrigation water to several user networks 3.3 user network distribution network belonging to the user which supplies land irrigation systems 3.4 nominal diameter (DN) alpha-numerical designation of dimension for the components of a piping network used for reference purposes. It comprises the letters DN followed by a whole number without units, which is indirectly related to the actual dimensions, in millimetres, of the bore or the external diameter of the end connections NOTE The number which follows the letters DN does not represent a measurable value and should not be used for calculation purposes, except where specified in the relevant standard. [EN ISO 6708:1995] 3.5 nominal pressure (PN) alpha-numerical term used for reference purposes and relating to a combination of mechanical and dimensional characteristics of a pipeline network component. It comprises the letters PN followed by a whole number without unit NOTE 1 The number following the letters PN does not represent a measurable value and it should not be used for calculation purposes except where specified in the relevant standard. NOTE 2 The term PN is not significant unless it is associated with the number of the relevant component standard. NOTE 3 The permissible pressure of a component of a pipeline network depends on the PN value, the material and the design of the component, its permissible temperature, etc., and is given in the tables of pressure/temperature relationships specified in the relevant standards.
NOTE 4 It is planned that all components with the same PN and DN designations have the same connection dimensions for compatible flange types. [EN 1333:1996] SIST EN 14267:2004



EN 14267:2004 (E) 7 3.6 hydraulic test pressure (Pt) or test pressure pressure, chosen in the service pressure variation range, to which the equipment is subjected for test purposes [EN 764:1994] 3.7 regulated downstream pressure (PAR) pressure measured at the level of the connection to the user network once the permanent flow-rate is attained in the hydrant 3.8 setpoint downstream pressure (PAC) desired reference pressure at the output from the hydrant at the level of the connection to the user network 3.9 allowable operating pressure (PFA) maximum hydrostatic pressure that a component is capable of withstanding continuously in service [EN 805:2000] 3.10 allowable maximum operating pressure (PMA) maximum pressure occurring from time to time, including surge, that a component is capable of withstanding in service [EN 805:2000] 3.11 allowable site test (PEA) maximum hydrostatic pressure that a newly installed component is capable of withstanding for a relatively short duration, in order to ensure the integrity and tightness of the pipeline [EN 805:2000] 3.12 pressure regulator self acting device (operating without external energy input) enabling the output water pressure to be reduced at an approximately constant value between certain limits within the regulation range, in spite of variations in pressure and/or discharge at the inlet 3.13 pressure regulator calibration pressure (PTR) adjustment pressure of the pressure regulator of the hydrant It is normally superior to the downstream set point pressure (PAC) in order to take into account head losses caused by parts of the hydrant situated downstream of the regulator, such as: nozzle, flow-rate limiter, etc. 3.14 flow-rate limiter self acting valve apparatus operating without external energy input intended to ensure that the flow-rate does not exceed a certain threshold under any circumstances 3.15 permanent flow-rate (QN) highest flow-rate within the rated operating conditions, at which the components of the irrigation hydrants are required to operate in a satisfactory manner within the maximum permissible error SIST EN 14267:2004



EN 14267:2004 (E) 8 The following designations are used:  QNB, the permanent flow-rate of the body of the hydrant;  QNP, the permanent flow-rate of the outlet;  QNR, the permanent flow-rate of the pressure regulator;  QNL, the permanent flow-rate of the flow-rate limiter;  QNC, the permanent flow-rate of the meter. 3.16 minimum operating flow-rate (QRmin. and QRmin.) the lowest flow-rate at which the water meter and the pressure regulator are required to operate within the maximum permissible error The following designations are used:  QRmin. : the minimum operating flow-rate for the meter;  QRmin. : the minimum operating flow-rate for the pressure regulator. 3.17 maximum accidental flow-rate (QMA) maximum flow-rate which may be delivered by the outlet for a period of time limited to a few minutes only, without deterioration of all or part of the equipment 3.18 overload flow-rate (QSC) highest flow-rate, at which a water meter is required to operate, for a short period of time, within its maximum permissible error, whist maintaining its metrological performance when it is subsequently operated within its rated operating conditions 3.19 nominal hydrant closing time (tcNB) closing time defined by the manufacturer for hydrants other than those operated using a wheel 3.20 head loss (∆h) loss of energy for a given flow-rate due to the presence of the hydrant in the pipeline 3.21 permanent head loss (∆hN) loss of energy due to the presence of the hydrant at its permanent flow-rate 3.22 maximum operating torque (MOT) higher limit fixed for the torque which, when applied at the entrance point of the mechanical energy, will operate the valve and ensure compliance with the required leakage rate [EN 1074-1:2000] SIST EN 14267:2004



EN 14267:2004 (E) 9 4 Classification 4.1 By function Distinction is made between four types of irrigation hydrants, which integrate the following functions:  type 1: shut-off and metering;  type 2: shut-off, metering and flow-rate limitation;  type 3: shut-off, metering and pressure regulation;  type 4: shut-off, metering, flow-rate limitation and pressure regulation. Other ancillary functions (remote reading, prepayment, etc.) may be included unto any of types 1 to 4 provided they do not affect the performance of the meters as defined in this document. 4.2 By dimension Table 1 — Classification of hydrants according to connection dimensions Nominal diameter of the outlet (DNP) b Nominal diameter (DNB) b 50 65 80 100 150 200 65 X a X a
80 X a X a X a
100 X a X a X a X a
150 X a X a X a X a X a
200 X a X a X a X a X a X a a Possible solutions. b See Figure 1. 4.3 By PN PN 10, PN 16 and PN 25. 4.4 By flow-rate limiter class Class 1 flow-rate limiter: can operate up to a maximum differential pressure of 5 bar; Class 2 flow-rate limiter: can operate up to a maximum differential pressure of 10 bar. 5 Quality of irrigation waters 5.1 General Irrigation water may permanently or occasionally contain mineral or organic materials in variable proportions. Three qualities of water have been defined for testing purposes. SIST EN 14267:2004



EN 14267:2004 (E) 10 5.2 Water quality 1a Water quality 1a contains a total load of solid particles composed of three loads whose classes have an increasing granulometry. Table 2 — Classes of granulometry Material Solid particles Total content of
solid particles of classes 1 + 2 + 3 (2,0 ± 0,2) g/l with over 95 % of silica SiO2 Class 1 content Granulometry between 20 µm and 60 µm
fraction by mass (25 ± 5) % of the total content of solid particles Class 2 content Granulometry between 60 µm and 320 µm fraction by mass (50 ± 10) % of the total content of solid particles Class 3 content Granulometry between 320 µm and 1 600 µm fraction by mass (25 ± 5) % of the total content of solid particles 5.3 Water quality 1b To obtain water quality 1b, from water quality 1a, it shall be added a total load of particles of 100 mg/l of synthetic fibres whose characteristics are the following: Synthetic fibre:  approximately volume mass: < 1 000 kg/m3;  resistance to traction: > 400 MPa;  module of elasticity: > 12 GPa;  wetting (immersion time): < 90 s;  thickness of fibre: approximately 40 µm to 50 µm;  width: 0,6 mm to 0,7 mm;  length: 15 mm to 20 mm. 5.4 Water quality 1c Clean water 5.5 Water quality 2 Water quality 2 is water, which corresponds to the transportation of large particles through the hydrant.  Particles: form: spherical balls; number of balls: 48; density: 24 balls between 0,9 and 1,1; 24 balls greater than 2; SIST EN 14267:2004



EN 14267:2004 (E) 11 size of balls with respect to meter: equal to 10 % of nominal diameter of hydrant outlet to be tested with
± 2 %. 6 Requirements 6.1 Dimensional hydrant specifications
Figure 1 — Hydrant dimensions Face to face (L2) and face to axis (H and L1) dimensions shall be specified in the manufacturer's documentation. DNP: nominal diameter of the outlets. DNB: nominal diameter of the hydrant body. 6.2 Requirements for total head loss in the hydrant The total head loss (∆h) measured between the upstream flange which connects to the distribution network and connection to the user network shall not exceed, for the nominal flow-rate of the hydrant, the following values according to the classification given in 4.1 and 8.4:  for type 1: maximum head loss of 0,5 bar;  for type 2: maximum head loss of 0,8 bar;  for type 3: maximum head loss of 0,8 bar;  for type 4: maximum head loss of 1,1 bar. The flow-rate passing through the body of the hydrant (DNB, see Figure 1) shall be established at the nominal flow-rate of the hydrant (QNB) in the following manner:  The test is carried with wide-open hydrant and with regulation elements deactivated. SIST EN 14267:2004



EN 14267:2004 (E) 12 The outlet with the highest nominal flow-rate (QNP) operates at its nominal flow-rate and the opening accommodates any eventual complement of the nominal flow-rate of the hydrant (QNB) if necessary of one or more outlets. A measurement of pressure is taken between the flange, which connects to the distribution network and downstream of the outlet, which has the highest flow-rate (see 8.4). 6.3 Conception requirement 6.3.1 General Mechanical resistance to internal pressure is tested in compliance with 8.1. The tightness with respect to internal pressure of the casing and all components subjected to pressure is tested in compliance with 8.2.1. The hydrant shall meet the endurance specifications laid down in the standard and the pressure ram tests described in 8.5. The mechanical strength tests may be carried out independently on the hydrant body or on the outlet nozzle. 6.3.2 Materials  Nodular graphite cast iron (FGS) shall be in accordance with EN 1563;  malleable cast iron shall be in accordance with EN 1503-3;  lamellar graphite cast iron, Type FGL 200 minimum shall be in compliance with EN 1561;  steel and steel alloys;  copper alloys;  all other materials with an equivalent mechanical resistance (see 8.1) may be used. For external protection made using paintwork, a neutral salt spray test (NSS) shall be carried out as defined in ISO 9227 and the parts tested shall be inspected after 300 h to verify that they do not present any pitting or rust points or spots as indicated in level 1 of the intensity of the change in the appearance of paintwork as specified in EN ISO 4628-1:2003, Table 1. 6.3.3 Hydrant body 6.3.3.1 General The body of the hydrant is composed of:  a base;  one or more closure devices to provide the shut-off function; a hydrant head (or outlet base) fitted with one or more outlet openings. 6.3.3.2 Base The base is made up of a casing which comprises a connecting flange (according to the nominal pressure (PN) selected), situated on its lower part. The diameter of the flanges is given in Table 3 below, according to the nominal flow-rate of the hydrant body. SIST EN 14267:2004



EN 14267:2004 (E) 13 Table 3 — Diameter of connecting flange according to nominal flow rate Nominal flow-rate of the hydrant body (QNB)
(sum of the flow-rates of the
outlets operating simultaneously) m3/h Nominal diameter (DN) of
connecting flange 30 65 45 80 80 100 120 150 160 200 The base shall enable an air release valve to be fitted. 6.3.3.3 Closure device 6.3.3.3.1 General This device is designed to operate with the hydrant fully open. Under no circumstances should it be used as a regulating device. The hydrant may be equipped with a lubrification device for the screw-nut system. The obturator shall be rigidly connected to the device for manoeuvring the closure valve in order to control phenomena liable to generate pressure rams. 6.3.3.3.2 Type of closing system  Wheel:  the total number of revolutions of the wheel shall be less than 35. The closing direction shall be FSH type;  this number will be declared by the manufacturer;  other systems:  in the case of other closing systems, the closing time of the hydrant (tcNB) shall not exceed the time defined in 7.6 of ISO 9635:1990;  this closing time shall be declared by the manufacturer; in all cases, pressure ram tests shall be used to verify these parameters (see 8.5). 6.3.3.4 Hydrant head The hydrant head comprises one or more distribution openings designed to accommodate outlets; these openings are identified. 6.3.3.5 Automatic drainage The hydrant shall be designed to enable an automatic drainage device to be fitted. SIST EN 14267:2004



EN 14267:2004 (E) 14 6.3.4 Distribution outlets Dimensional specifications The diameter of the nozzle of the distribution outlets shall be selected in compliance with Table 4 according to the permanent flow-rate of the outlet (QNP). Table 4 — Outlet nozzle diameter according to permanent outlet flow-rate Nominal outlet nozzle diameter (DN) Permanent outlet flow-rate (QNP) m3/h 50 20 65 30 80 45 100 60 150 120 200 160 6.3.5 Pressure regulator 6.3.5.1 Function of the regulator The pressure regulator reduces the variable upstream pressure in the body of the hydrant in order to maintain the pressure downstream of the outlet [regulated downstream pressure (PAR)] within the regulation range. NOTE The presence of a water pressure regulator does not obviate the need for safety apparatus (for example: safety valve) in the network, as the regulator alone cannot eliminate possible rises of pressures originating in the downstream circuit (pressure ram). 6.3.5.2 Range of set point downstream pressures (PAC) The range of set point downstream pressures (PAC) is defined by the values given below: 2 bar ≤ PAC ≤ 10 bar 6.3.5.3 Permissible pressure (PFA) The manufacturer shall declare the permissible operating pressure (PFA). NOTE In order to avoid cavitation, the permissible pressure is generally less than or equal to 3 times the set point downstream pressure (PAC) 6.3.5.4 Guaranteed regulation ranges The regulated downstream pressure (PAR) shall remain within the following regulation range:  set point downstream pressure (PAC) ≤ regulated downstream pressure (PAR) ≤ 1,1 times set point downstream pressure (PAC) + 0,5 bar; when the upstream pressure and the flow-rate vary within the following operating ranges:  set point downstream pressure (PAC) + 2 bar ≤ upstream pressure ≤ permissible pressure (PFA); SIST EN 14267:2004



EN 14267:2004 (E) 15 minimum pressure regulator flow-rate (QRmin.) ≤ flow-rate ≤ nominal pressure regulator flow-rate (QNR). 6.3.5.5 Nominal pressure regulator flow-rate (QNR) The nominal pressure regulator flow-rate (QNR) is equal to the nominal flow-rate of the outlet (QNP) on which the regulator is installed (see Table 4). 6.3.5.6 Minimal operating pressure regulator flow-rate (QRmin.) The minimal operating pressure regulator flow-rate (QRmin.) shall be lower or equal to the value given in Table 5. Table 5 — Minimum pressure regulator flow-rate (QRmin.) according to the nominal outlet diameter (DNP) Nominal outlet diameter (DNP) Minimum pressure regulator flow-rate (QRmin.) m3/h 50 2 65 4 80 6 100 8 150 15 6.3.6 Flow-rate limiter 6.3.6.1 Function of the flow-rate limiter The flow-rate limiter is designed to prevent the contractually specified flow-rate being exceeded. It shall be possible to fit a flow-rate limiter to the hydrant body or the outlets. 6.3.6.2 Designation of the flow-rate limiter The flow-rate limiter is designated by:  its type;  its permissible pressure differential; its nominal flow-rate (QNL) expressed in m3/h. 6.3.6.3 Characteristics of the flow-rate limiter The flow-rate limiter shall:  limit the flow-rate to the nominal value for which it is calibrated;  o
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