BS EN 13742-2-2004 Irrigation techniques - Solid set sprinkler systems - Test methods《灌溉技术 固定式喷灌系统 试验方法》.pdf

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1、BRITISH STANDARD BS EN 13742-2:2004 Irrigation techniques Solid set sprinkler systems Part 2: Test methods The European Standard EN 13742-2:2004 has the status of a British Standard ICS 65.060.35 BS EN 13742-2:2004 This British Standard was published under the authority of the Standards Policy and S

2、trategy Committee on 19 November 2004 BSI 19 November 2004 ISBN 0 580 44789 8 National foreword This British Standard is the official English language version of EN 13742-2:2004. The UK participation in its preparation was entrusted to Technical Committee AGE/30, Irrigation and drainage equipment, w

3、hich has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the se

4、ction entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

5、 Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor r

6、elated international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issu

7、ed. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN137422 November2004 ICS65.060.35 Englishversion IrrigationtechniquesSolidsetsprinklersystemsPart2:Test methods TechniquesdirrigationInstallationsdecouverture intgraleparasperseursPartie2:Mt

8、hodesdessai BewsserungsverfahrenOrtsfestinstallierte BeregnungssystemeTeil2:Prfverfahren ThisEuropeanStandardwasapprovedbyCENon2September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithouta

9、nyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCEN

10、memberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,

11、Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCE

12、NnationalMembers. Ref.No.EN137422:2004:EEN 13742-2:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Inspection and testing before pressurization.4 5 Inspection and testing at start-up4 5.1 Recommendation.4 5.2 Preliminary pressurization of main-lines

13、 and sub-mains4 5.3 Visual inspection .5 5.4 Hydraulic measurements 5 5.5 Distribution uniformity measurements5 6 Presentation of test results 8 Bibliography 9 EN 13742-2:2004 (E) 3 Foreword This document (EN 13742-2:2004) has been prepared by Technical Committee CEN/TC 334 “Irrigation techniques”,

14、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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. According to t

15、he 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, Luxem

16、bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13742-2:2004 (E) 4 1 Scope This document provides a document to check and test, the proper operation and performance of a solid set irrigation system installed according to rele

17、vant design documents specified in EN 13742-1. 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

18、amendments) applies ISO 7749-1:1995 Agricultural irrigation equipment - Rotating sprinklers - Part 1: Design and operational requirements. ISO 7749-2: 1990, Irrigation equipment - Rotating sprinklers - Part 2: Uniformity of distribution and test methods EN 13742-1:2004, Irrigation techniques - Solid

19、 set sprinkler systems - Part 1: Selection, design, planning and installation. 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13742-1:2004 apply. 4 Inspection and testing before pressurization Inspect if all the installed material and its location on

20、 the site correspond to the detailed bill of materials and to the plans that have been supplied with the installation. 5 Inspection and testing at start-up 5.1 Recommendation Before pressurization, all pipes shall be flushed to wash out dirt that may have accumulated during network installation. 5.2

21、 Preliminary pressurization of main-lines and sub-mains Main-lines and sub-mains shall be pressurized at a pressure 1,5 times higher than operating pressure before filling the trenches. No leak or damage shall be visible. EN 13742-2:2004 (E) 5 5.3 Visual inspection Pressurize the system for normal o

22、peration according to design specification and check: a) Water tightness after start-up at the network nominal operating pressure specified by the design; b) for no leaks shall be between the various system components; c) sprinkler operation. Make sure that they all rotate; d) risers which shall be

23、vertical and stable; e) proper valve operation; f) that all material is installed following manufacturers instructions; 5.4 Hydraulic measurements After the visual check, measure the following: a) pressure at the system inlet; b) total flow. It shall correspond to project flow (more or less 5 %); c)

24、 pressure measurements at lateral sprinklers exposed to highest and lowest pressure. On a sub-unit, pressure measurements shall be made at the most pressurized and less pressurized sprinkler with an accuracy of more or less 5%. Pressure variation between those two sprinklers shall not exceed 20 % of

25、 the design layout plan pressure. 5.5 Distribution uniformity measurements 5.5.1 General The purpose of the water distribution uniformity tests, performed according to ISO 7749-2, is to verify the performance of the installation according to the original design layout plan. 5.5.2 Characteristics of

26、the test area The test area shall be of a square pattern and match the spacing of sprinklers and laterals as defined in the design layout plan (triangular, rectangular, spacing 15mx15m, 18mx18m, etc.). For every irrigation sub-unit two test areas, representative of the most and lees pressurized spri

27、nkler zones shall be measured at least. The surface area on which the collectors are placed shall be unobstructed, so as not to hinder water distribution. EN 13742-2:2004 (E) 6 5.5.3 Characteristics of rain gauges The rain gauges shall be: a) approximately cylindrical, for at least the top third of

28、their height; b) be of the same size and shape; c) have sharp edges on the upper opening; d) be constructed so that none of the water collected splashes out. The height of the rain gauges shall be at least twice the average depth of the water collected during the test and not less than 15 cm. The di

29、ameter of the rain gauges opening shall be half to one times its height, and not less than 8,5 cm. The openings of all the rain gauges shall be in a plane parallel to the ground, with a vertical tolerance of 5. The difference in height between any two adjacent rain gauges shall not exceed 2 cm. 5.5.

30、4 Characteristics of atmospheric conditions The maximum allowed wind speed during the test is defined in ISO 7749-1:1995, table 3. Wind measurement shall be carried out at a distance not greater than 45 m from a side of the test area, and at a height of about 90 % of the maximum trajectory height, b

31、ut not less than 2 m. At beginning of the distribution uniformity test and during the test the wind velocity and direction shall be measured in an open field at intervals not exceeding 15 min. The relative humidity and ambient temperature shall be measured during the test. 5.5.5 Pressure measurement

32、 The pressure shall be adjusted to the design layout plan pressure. The pressure shall be measured at the sprinkler inlet, and kept constant over the duration of the test with accuracy of 20 kPa. 5.5.6 Duration of test The minimum test duration shall be 1 hour. 5.5.7 Rain gauges placement pattern Th

33、e rain gauges shall be placed over the entire test area (see figure1). The spacing between two collectors shall be in accordance to ISO 7749-2:1990, 4.2. EN 13742-2:2004 (E) 7 Key 1 Sprinkler 2 Calculation spacings 3 Collector Figure 1 Set-up of catch cans (case of square sprinkler spacing) 5.5.8 Pr

34、ocessing of the data collected The coefficient of distribution uniformity shall be computed from the results of the sprinkler distribution tests in the field. The quantity of water collected in each collector, serves as a basis for calculating the Christiansen uniformity coefficient. Following formu

35、la is used: CC hh nh mi m = 100 1 where CC is the Christiansen uniformity coefficient; n is the number of readings; h mis the arithmetic average of the readings; h iis the individual reading in each collector; hh mi is the sum of the absolute values of the deviations between the arithmetic average o

36、f the readings and the individual reading in each collector. EN 13742-2:2004 (E) 8 6 Presentation of test results The test report shall refer to this document and provide the following information: a) results from inspection and testing before pressurization; b) results from visual inspection; c) re

37、sults from measurements as in 5.4; d) Christiansen uniformity distribution coefficient in % for the different areas of the installation tested. EN 13742-2:2004 (E) 9 Bibliography 1 EN 12734, Irrigation techniques - Quick coupling pipes for movable irrigation supply - Technical characteristics and te

38、sting. 2 ISO 8026, Agricultural irrigation equipment - Sprayers General requirements and test methods. 3 ISO 11419, Agricultural irrigation equipment - Float type air release valves. BS EN 13742-2:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent

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