BS-EN-13742-1-2004.pdf

BRITISH STANDARD BS EN 13742-1:2004 Irrigation techniques Solid set sprinkler systems Part 1: Selection, design, planning and installation The European Standard EN 13742-1:2004 has the status of a British Standard ICS 65.060.35 ? BS EN 13742-1:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 November 2004 © BSI 19 November 2004 ISBN 0 580 44790 1 National foreword This British Standard is the official English language version of EN 13742-1:2004. The UK participation in its preparation was entrusted to Technical Committee AGE/30, Irrigation and drainage equipment, which 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 section 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. 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 related 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 16, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13742-1 November 2004 ICS 65.060.35 English version Irrigation Techniques - Solid set sprinkler systems - Part 1: Selection, design, planning and installation Techniques d´irrigation - Installation de couverte intégrale par asperseurs - Partie 1 : Sélection, conception, planning et installation Bewässerungsverfahren - Ortsfest installerte Beregnungssysteme - Teil 1: Auswahl, Auslegung, Planung und Installation This European Standard was approved by CEN on 2 September 2004. 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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. 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 STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13742-1:2004: E EN 13742-1:2004 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .5 4 Characteristics of principal components of a solid set irrigation system.8 4.1 General8 4.2 Pipes .8 4.3 Valves9 4.4 Irrigation controller9 4.5 Fertilizer unit 10 4.6 Sprinklers .10 5 Data necessary for project design.12 5.1 General12 5.2 Project location12 5.3 Crop characteristics12 5.4 Climatic characteristics 13 5.5 Water supply characteristics13 5.6 Soil characteristics13 6 Hydraulic performance of the installation.14 6.1 Sprinkler application characteristics.14 6.2 Pipe water transport characteristics14 7 System description15 7.1 Description of sprinklers 15 7.2 Description of pipeline network.15 7.3 Description of valves and special components .15 7.4 Localization of equipment 15 8 Legal authorizations15 Bibliography16 EN 13742-1:2004 (E) 3 Foreword This document (EN 13742-1:2004) 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 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. EN 13742-1:2004 (E) 4 1 Scope This document provides guidelines to choose material, to design, to prepare plans, and to install a solid set irrigation system to apply water to the irrigated area with the greatest possible efficiency. This document covers sprinkler irrigation systems installed at the beginning of the irrigation season and removed at the end without moving any component, sprinkler or pipe, during the entire irrigation season. It covers only solid set system components located on the field and upstream from a water supply point defined by a pressure and a flow. This document does not cover permanent systems with buried pipes nor hand-movable portable systems. 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 12734, Irrigation techniques - Quick coupling pipes for movable irrigation supply - Technical characteristics and testing. EN 13742-2, Irrigation techniques - Solid set sprinkler systems - Part 2: Test methods. ISO 7749-1:1995, Agricultural irrigation equipment - Rotating sprinklers - Part 1: Design and operational requirements. ISO 7749-2, Irrigation equipment - Rotating sprinklers - Part 2: Uniformity of distribution and test methods. ISO 9644, Agricultural irrigation equipment - Pressure losses in irrigation valves - Test method. ISO 11419, Agricultural irrigation equipment - Float type air release valves. EN 13742-1:2004 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 solid set irrigation system sprinkler irrigation system installed at the beginning of the irrigation season and removed at the end without moving any component, sprinkler or pipe, during the entire irrigation season 3.2 main-line piping of a pressurized irrigation network connecting the water supply to the sub-mains or to the laterals 3.3 sub-mains piping connecting main-line to laterals 3.4 laterals piping connecting main-line or sub-main to sprinklers 3.5 piping watertight pipes that can carry a pressurized fluid from one point to another 3.6 valve device used to totally or partially permit or prevent circulation of a fluid 3.7 filter device used to separate and remove solid particles from a fluid 3.8 riser rigid pipe used to connect sprinklers to laterals 3.9 riser mount component located on the lateral to allow riser installation 3.10 riser stand device that maintains the riser in a vertical position, i.e. tripods, stabilizers etc. 3.11 sprinkler inlet part of the sprinkler used to connect sprinkler to riser or lateral EN 13742-1:2004 (E) 6 3.12 rotating sprinkler device which by its rotating motion around its vertical axis distributes water over a circular area or part of a circular area 3.13 radius of throw farthest distance measured, while the sprinkler is rotating normally, from the centreline to the point at which the sprinkler deposits water at a rate of 0,25 mm/h for a sprinkler whose discharge exceeds 75 l/h, and 0,13 mm/h for a sprinkler whose discharge is equal to or less than 75 l/h, typically measured at any arc of coverage except at arc extremes for part-circle sprinklers according to ISO 7749-1 3.14 pressure regulator valve in which the water passage widens or narrows automatically to maintain a relatively constant pressure at the outlet of the pressure regulator under varying pressures or flow rates at the inlet of the pressure regulator 3.15 controller device that automatically controls all or part of the operation of an irrigation system 3.16 fertilizer unit fertilizer pump (electrical, hydraulic or other), or fertilizer injection tank, which is used to inject fertilizer solutions into an irrigation system 3.17 drain valve valve that allows to drain irrigation pipes 3.18 air release valve valve which opens automatically to allow air from the atmosphere to enter the water pipeline during drainage of the line and/or venting of air from the water pipeline to the atmosphere during filling or during normal operation of the pipeline under pressure 3.19 sprinkler nominal flow rate quantity of water per unit of time discharged by a sprinkler with a specific nozzle at ambient temperature at the test pressure declared by the manufacturer in the manufacturers data sheets according to ISO 7749-1 3.20 sprinkler test pressure (see definition in ISO 7749-1:1995, 3.6 and 3.7) water pressure, within the range of minimum effective pressure and maximum effective pressure declared by the manufacturer as the pressure range in which the sprinkler operates effectively, used for testing the sprinkler EN 13742-1:2004 (E) 7 3.21 minimum effective pressure lowest working pressure declared by the manufacturer, measured near the base of the sprinkler, at a point situated about 0,2 m below the main nozzle of the sprinkler, but with the pressure gauge situated in the same plane as the main nozzle 3.22 maximum effective pressure highest working pressure declared by the manufacturer, measured near the base of the sprinkler, at a point situated about 0,2 m below the main nozzle of the sprinkler, but with the pressure gauge situated in the same plane as the main nozzle 3.23 system test pressure water pressure, within the range of effective pressure used for testing the system 3.24 nominal pressure operating pressure of a sprinkler equipped with a given nozzle, operating at ambient temperature and giving the nominal flow indicated by the manufacturer's performance charts. It is within the operating pressure range 3.25 system pressure the approximate operating pressure of the sprinklers used in the project to dimension the different pipes 3.26 quick coupling pipe a portable pipe with coupling parts which give a safe connection with the pipe of the same kind in a few seconds mostly without a tool and which can be loosened in the same easy way according to EN 12734. 3.27 quick coupling valve movable valve equipped with fittings allowing a secure connection between two pipes with the same quick couplers. Connection and disconnection is rapid and requires no tools 3.28 sub-unit number of sprinklers fed by the same water source and operating at the same time 3.29 potential evapotranspiration (ETP or ET) maximum quantity of water capable of being evaporated in a given climate, by a continuous expanse of vegetation covering the whole ground and well supplied with water. It includes evaporation from the soil and transpiration from the vegetation in a specific region during a 24 h period, expressed as a depth of water EN 12484-1 3.30 crop coefficients (Kc) factors correcting the evapotranspiration ratio according to the plant and its growing stage EN 12484-1 EN 13742-1:2004 (E) 8 4 Characteristics of principal components of a solid set irrigation system 4.1 General Besides the necessity to resist to the operating pressure, the different system components shall also durably withstand other operational conditions during use, such as mechanical stress factors from transport and moving, abrasion by ground contact or dirty water corrosion and chemical influence from aggressive water and soil, fertilizers or chemical products usually mixed into the irrigation water. 4.2 Pipes 4.2.1 General Main characteristics are: 4.2.2 Mainlines and sub-mains Those pipes shall be made of steel, aluminum, PVC, PE or any other material suitable for eventual mixing fertilizers or chemicals in the irrigation water. They shall be manufactured and sized to carry irrigation water at a suitable flow and pressure to ensure correct system operation. They can be laid on the ground or buried. Their maximum admissible operating pressure shall be 1,5 times higher than project maximum pressure. 4.2.3 Laterals Laterals shall be manufactured according to the relevant European standard or equivalent national standard. Laterals shall consist of pipes 6 to 12 meter long made out of steel, aluminium alloy or plastics material connected together with fittings. Fittings can be built into the pipe or be separate. Couplings can be hook or twist locks. Fittings can have a built- in outlet for sprinkler risers. Laterals shall be sized according to the subunit (diameter and maximum length) to accept a maximum 10 % flow variation between two sprinklers operating respectively at the highest and lowest pressure. This represents a 20 % pressure variation. Maximum operating pressure will be 1,5 times higher than the planned project pressure in the pipe. 4.2.4 Fittings In a given installation, the fittings for same diameter pipe shall be of the same type and shall be made of the same material and shall accept the same pressure conditions. 4.2.5 Pressure gauge tapings A sufficient number of pressure gauge tapings, conforming to ISO 9644, shall be installed in different parts of the system in order to enable checking system pressure. EN 13742-1:2004 (E) 9 4.3 Valves 4.3.1 Manual valves They shall be accessible, easy to operate, and compatible with fertilizers in irrigation water. Their diameter shall be large enough to allow the required project flow without excessive pressure loss. 4.3.2 Automatic valves They shall be accessible, easy to operate, compatible with fertilizers or chemicals in the irrigation water, and have a manual operation feature. Their operating power requirement shall be c