BS EN 14267-2004 Irrigation techniques - Irrigation hydrants《灌溉技术 灌溉龙头》.pdf

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1、BRITISH STANDARD BS EN 14267:2004 Irrigation techniques Irrigation hydrants ICS 65.060.35 Incorporating October 2008 corrigendum This British Standard was published under the authority of the Standards Policy and Strategy Committee on 5 August 2004BS EN 14267:2004 National foreword A list of organiz

2、ations represented on this committee can be obtained on This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda

3、issued since publication Date Comments This British Standard is the UK implementation of EN 14267:2004, incorporating corrigendum October 2008. The UK participation in its preparation was entrusted to Technical Committee request to its secretary. AGE/30, Irrigation and drainage equipment. 30 June 20

4、09 Implementation of CEN corrigendum October 2008. Equation (1) replaced in 6.3.7.2.1 BSI 2009 ISBN 978 0 580 65035 2EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14267 July2004 ICS65.060.35 Englishversion IrrigationtechniquesIrrigationhydrants TechniquesdirrigationBornesdirrigation Bewsserungsve

5、rfahrenHydrantenfr Bewsserungswasser ThisEuropeanStandardwasapprovedbyCENon6May2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconc

6、ernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariat

7、hasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,Sw

8、itzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14267:2004:E Incorporatingcorri

9、gendumOctober2008EN 14267:2004 (E) 2 Contents page Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Classification9 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 General9 5.2 Water quality 1a .10 5.3

10、 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 hydrant11 6.3 Conception requirement .12 7 Connection to the user network.18 7.1 Connection piece.18 7.2 Closure of the conne

11、ction piece 18 7.3 Decompression valve18 7.4 Protection device.18 8 Testing and inspection methods18 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 Measu

12、rement 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 meters27 BS EN 14267:2004EN 14267:2004 (E) 3 8.9 Measurement and test apparatus 31 8.10 Endurance test of the stopper device .31 9 Marking.34 9

13、.1 General .34 9.2 Of meters34 9.3 Of hydrant bodies35 9.4 Of outlets35 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 functi

14、ons.37 A.5 Methods of use 38 Bibliography39 BS EN 14267:2004EN 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 nationa

15、l 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 count

16、ries 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, Switzer

17、land and United Kingdom BS EN 14267:2004EN 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 r

18、eferences 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 met

19、allic 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, Fl

20、anges 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 Standar

21、ds. 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 mad

22、e 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

23、 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, w

24、elded 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. BS EN 14267:2004EN 14267:2004 (E) 6 3 Terms and definitions For the purposes

25、 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 bo

26、dy 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 “pressur

27、e 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

28、 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 un

29、its, 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 rel

30、evant 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 numb

31、er 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 permissib

32、le 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 wi

33、th the same PN and DN designations have the same connection dimensions for compatible flange types. EN 1333:1996 BS EN 14267:2004EN 14267:2004 (E) 7 3.6 hydraulic test pressure (P t ) or test pressure pressure, chosen in the service pressure variation range, to which the equipment is subjected for t

34、est 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

35、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 serviceEN 805:2000 3.10 allowable maximum operating pressure (PMA) maximum pressure occurring from time to time, including surge, that

36、 a component is capable of withstanding in serviceEN 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 press

37、ure 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

38、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

39、, 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 comp

40、onents of the irrigation hydrants are required to operate in a satisfactory manner within the maximum permissible error BS EN 14267:2004EN 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, t

41、he 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 wi

42、thin 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 pe

43、riod 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 perfo

44、rmance 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 hyd

45、rant 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

46、 compliance with the required leakage rate EN 1074-1:2000 BS EN 14267:2004EN 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-ra

47、te 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

48、 as defined in this document. 4.2 By dimension Table 1 Classification of hydrants according to connection dimensions Nominal diameter of the outlet (DNP) bNominal diameter (DNB) b50 65 80 100 150 200 65 XaXa80 XaXaXa100 XaXaXaXa150 XaXaXaXaXa200 XaXaXaXaXaXaaPossible solutions. bSee 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 o