SIST EN 13160-2:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LLeckanzeigesysteme - Teil 2: Über- und UnterdrucksystemeSystemes de détection de fuites - Partie 2: Systemes en pression et en dépressionLeak detection systems - Part 2: Pressure and vacuum systems23.160Vakumska tehnologijaVacuum technology23.020.01Fluid storage devices in generalICS:Ta slovenski standard je istoveten z:EN 13160-2:2003SIST EN 13160-2:2003en,fr,de01-december-2003SIST EN 13160-2:2003SLOVENSKI
STANDARD



SIST EN 13160-2:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13160-2May 2003ICS 23.020.01; 23.040.99; 29.260.20English versionLeak detection systems - Part 2: Pressure and vacuum systemsSystèmes de détection de fuites - Partie 2: Systèmes enpression et en dépressionLeckanzeigesysteme - Teil 2: Über- undUnterdrucksystemeThis European Standard was approved by CEN on 10 March 2003.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13160-2:2003 ESIST EN 13160-2:2003



EN 13160-2:2003 (E)2ContentspageForeword.31Scope.32Normative references.33Terms and definitions.44Symbols and abbreviations.45General.46Interstitial space.47Vacuum and pressure leak detectors.57.1General.57.2Pressure leak detectors.67.3Vacuum leak detectors.78Test.88.1Type test.88.2Test of the stop valve.168.3Test of the condensate trap.189Leak protecting lining.1810Leak protecting jacket.1811Marking.18Annex A (normative)
Type test of the pressure relief valve.19Annex B (normative)
Design of the dry filter.22SIST EN 13160-2:2003



EN 13160-2:2003 (E)3ForewordThis document (EN 13160-2:2003) has been prepared by Technical Committee CEN/TC 221, "Shop fabricatedmetallic tanks and equipment for storage tanks and for service stations", the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by November 2003, and conflicting national standards shall be withdrawn at the latestby November 2003.This European Standard consists of 7 parts:Leak detection systems;Part 1:General principlesPart 2:Pressure and vacuum systemsPart 3:Liquid systems for tanksPart 4:Liquid and/or vapour sensor systems for use in leakage containments or interstitial spacesPart 5:Dynamic tank gauge leak detection systemsPart 6: Sensor in monitoring wellsPart 7:General requirments and test methods for interstitial spaces, leak protecting linings and leak protectingjacktesAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.1 ScopeThis European Standard specifies the requirements for leak detection systems class I for use with double-skinsystems, designed for water polluting fluids.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 764, Pressure equipment - Terminology and symbols - Pressure, temperature, volume.EN 13160–1:2003, Leak detection systems — Part 1: General principles.EN 13160–4, Leak detection systems — Part 4: Liquid and/or vapour sensor systems for use in leakagecontainments or interstitial spaces.SIST EN 13160-2:2003



EN 13160-2:2003 (E)4EN 13160–7, Leak detection systems — Part 7: General requirements and test methods for interstitial spaces, leakprotecting linings and leak protecting jackets.3 Terms and definitionsFor the purposes of this European Standard, the terms and definitions given in EN 13160-1:2003 apply.4 Symbols and abbreviationsgis the force of gravity, in metres per second squaredhis the maximum filling height of the tank, in metreshGis the maximum height of the groundwater related to the lowest point of the tank, in metresh1is the filling height of the interstitial space due to alarm pressure pAE , in metreslis the length of the interconnecting line, in metrespAAis the relative pressure at control point "alarm off", in PascalpAEis the relative pressure at control point "alarm on", in PascalpPAis the relative pressure at control point "pump off", in PascalpPEis the relative pressure at control point "pump on", in Pascalp0is the operating pressure according to EN 764, in PascalVis the proportional reduction of the interstitial space caused by ingress of liquid for assurance of the alarm, in percentV1is the volume of the interstitial space at filling height h1, in cubic metresV0is the entire volume of the interstitial space, in cubic metresGis the density of the groundwater, in kilograms per cubic metreP is the density of the stored product in the tank, in kilograms per cubic metre5 GeneralGeneral principles according to EN 13160-1.Where the requirement is for low temperature performance the alternative test temperature is shown in brackets [.].6 Interstitial spaceGeneral requirements concerning the interstitial space according to EN 13160-7.The test methods for class I leak detection systems apply to interstitial space: for tanks with an interstitial space volume
8 m3 ; for pipes with an interstitial space volume
10 m3.SIST EN 13160-2:2003



EN 13160-2:2003 (E)5The entire interstitial space shall be capable of being filled with air or an inert gas and shall be gas tight, or it shallbe capable of sustaining a vacuum.The walls of the interstitial space shall withstand the pressure of the system or the vacuum pulled on the system.For a tank the system shall be designed so that there are no connections to the inner tank through the interstitialspace below the maximum filling level.For a pipe the system shall be designed so that there are no connections to the inner pipe through the interstitialspace.The internal diameter for the two connections to the interstitial space shall be at least 4 mm.One connection to the interstitial space of a double skin pipework shall be at the opposite end of the pipework tothe connected leak detector.7 Vacuum and pressure leak detectors7.1 GeneralThe vacuum or pressure used by the system, including changes of pressure caused by variations in temperatureshall not exceed the design parameter of tank, leak protecting lining, leak protecting jacket or pipe. Where thepressure in the interstitial space may exceed 90 % of the maximum allowable pressure a pressure relief valve shallbe fitted, which shall be conform to annex A. In a vacuum system at every low point of the interconnecting lines between the vacuum leak detector and theinterstitial space a condensate trap shall be installed.Leak detectors shall be designed so that it is possible to check the parameter of the system (i.e. pressure switchsettings) and to simulate alarm conditions.The internal diameter of the leak detector-to-interstitial space interconnecting lines shall be minimum:6 mm for air based systems;4 mm for inert gas based systems.The total flow resistance of the interconnecting lines between the leak detector and the double skin tank or pipemay be not more than 1 kPa (10 mbar) at (85 ± 15) l/h. This requirement is fulfilled for air-based systems, when thelength (l) of the interconnecting line is l
50 m for an inner diameter of the interconnecting line of 6 mm.The leak detector-to-interstitial space interconnecting lines shall be colour-coded as follows: measuring line:red suction and pressure line:white or clear exhaust line: green.A vacuum leak detector shall only serve one tank or pipework.A pipework may consist of several sections of a pipework where the interstitial spaces are connected.In the alarm pressure a leak detector shall deliver a volume flow of (85 ± 15) l/h, see Figure 1.SIST EN 13160-2:2003



EN 13160-2:2003 (E)6KeyaPressurebVolume flow ratecVacuumFigure 1 — Example of volume flow of a leak detector with 30 kPa alarm set point7.2 Pressure leak detectors7.2.1Humidity of the pressurising gasThe gas used for pressurisation shall have a relative humidity not exceeding 10 %. If air is used a dry filter accordingto annex B or other drying devices may be used.7.2.2Pressure leak detectors for tanksThe alarm pressure shall be higher by 3 000 Pa than the maximum pressure exerted by the maximum filling height ofthe tank including any operating pressure, as specified in Equation (1) or exerted by the maximum height of thegroundwater related to the lowest point of the tank, as specified in Equation (2).pAE = 3000 Pa + P
h
g + p0 (1)pAE = 3000 Pa + G
hG
g
(2)SIST EN 13160-2:2003



EN 13160-2:2003 (E)77.2.3Pressure leak detectors for pipe workThe alarm set point pressure shall be higher than the maximum operating pressure of the inner pipe by at least0,1 MPa (1 bar).7.2.4Pressure leak detectors without integrated pressure generatorThe requirements of 7.2.1 shall be met for pressure generation. The minimum alarm pressure shall be determinedaccording to 7.2.2 and 7.2.3. The interstitial space shall be free of liquid.NOTEWhere pressure leak detectors without integrated pressure generator are to be used on tanks, these should beequipped with a suction line, which is led down to the lowest point of the interstitial space to have the possibility to suck off anyexisting liquid before pressurising the interstitial space.Pressure leak detectors without integrated pressure generation are only suitable for use on tanks and pipeworks for atemperature range from -5 C to +30 C. In order to avoid false alarm and/or unacceptable high pressures in theinterstitial space, the alterations in pressure due to temperature shall be considered when determining the operatingpressure and the alarm set points of leak detectors.7.3 Vacuum leak detectors7.3.1GeneralThe interstitial space negative pressure shall - up to the occurrence of a leak - be maintained below atmosphericpressure.The vacuum leak detectors used for flat-bottomed tanks with double bottom, shall resist the expected pressure inthe case of a leak.The alarm shall be ensured according to 7.3.2. If this is not possible, a liquid sensor shall be installed according toEN 13160-4 at the lowest point of the interstitial space additionally to the vacuum leak detector.7.3.2Assurance of the alarmFor assurance of the alarm the volume of the interstitial space has to be reduced by increasing liquid,see Equation (3):100
) - Pa 100000 - Pa 100000 - (1AEPApp = V
in %(3)Due to the alarm pressure pAE the interstitial space is filled (in the case of a leak) up to the height h1 compared withthe lowest point of the tank, see Equation (4):GAE1PAE1
=
or
= gphgph (4)Under consideration of tank geometry the volume of the interstitial space V1 at filling height h1 has to be determinedby calculation (or by measurement in litres), see EN 13160-7.The alarm is considered reliable, if the following condition is fulfilled, see Equation (5):VV < V01 (5)NOTEThe above mentioned calculation would be carried out for tanks with a suction line down to the lowest point of theinterstitial space. An analog application is required for tanks without a suction line or for pipework, i. e. the line of reference forthe height h1 is the horizontal line through the lowest point, at which the suction line is connected with or ends in the interstitialSIST EN 13160-2:2003



EN 13160-2:2003 (E)8space. For tanks with a suction line down to the lowest point of the interstitial space it is the end of the suction line on the lowestpoint and for tanks without a suction line down to the lowest point of the interstitial space it is the suction nozzle at the top of thetank.7.3.3Vacuum leak detectors with integrated vacuum generatorThe vacuum pressure (relative value) at the alarm control point shall be at least:- as high as the pressure computed according to Equation (6):pAE = 3000 Pa +
g
h(6) 3 kPa, if the evacuating line in the interstitial space is led down to the lowest point; 25 kPa for flat-bottom tanks with double bottom.In the suction line a liquid operated or sensor operated device (stop valve) shall be fitted as near as possible to thetank, which in case of suction of liquid avoids further evacuating of the interstitial space and prevents penetrating ofliquid in the leak detector.7.3.4Vacuum leak detectors without integrated vacuum generatorFor the application of these systems the following conditions shall be fulfilled: a suction line (for the vacuum pump to be installed outside) which shall be led down to the lowest point of theinterstitial space; or at above-ground tanks, as an alternative, a control nozzle may be installed at the lowest point of the interstitialspace.The vacuum pressure (relative value) in the alarm control point shall be at least 35 kPa.The vacuum pressure (relative value) of the operating pressure shall be at least 70 kPa.To avoid false alarm the alterations in pressure due to temperature shall be considered when determining theswitching points.8 Test8.1 Type test8.1.1Test objectiveThe testing of the leak detection systems shall prove that the presented systems are able to indicate any leak in theinternal and in the external wall of the tank or pipe below the maximum filling level under all working conditions.The tests shall be deemed to have been passed where: the function in the indicated pressure range in view of the temperature range is ensured; the system also works in a longer period of time reliably.The following tests shall be carried out: function test; test of the reliability.SIST EN 13160-2:2003



EN 13160-2:2003 (E)98.1.2Test equipmentA pressure and vacuum proved test vessel, volume 1 l, with at least 3 nozzles for the connection of a measuringline, a suction or a pressure line of a leak detector and a ventilation line;a test vessel, volume 1 l, in the form of an open top flat-bottom vertical cylinder for the test liquid of 30 % glycol and70 % water;an environmental chamber the temperature of which can be varied over the range from - 25 C to + 70 C within anaccuracy of 2 K;for the test in a temperature range from – 40 °C to + 40 °C an environmental chamber the temperature of whichcan be varied over the range from – 50 °C to + 40 °C within an accuracy of 2 Ksolenoid valve, pressure switch;cycle counter;a stop clock having a time indication in steps of 1 s to a minimum total of 1 h, within an accuracy of 2 s;vacuum pump for the pre-evacuation of the interstitial space;a calibrated vacuum pump with a pump capacity of (85 ± 15) l/h air;pressure pump;measuring instrument for the volume flow with an accuracy of 2 % of the measured value;bath thermostat;measuring device for pressure (e. g. manometer or u-tube); with an accuracy of 0,6 % of the full scale range and adivision of 0,5 % of the value to be measured.8.1.3Pressure limit switch test for vacuum and pressure leak detectors8.1.3.1Test objectiveThe test objective is to guarantee that the pressure/vacuum switch at the specified volume flows gives an alarm atthe specified set points.8.1.3.2PreparationThe leak detector shall be connected to the suction or pressure line and the measuring line on the test vessel. Onenozzle of the test vessel shall be equipped with a regulating valve in the cross section or a controlled solenoid valveshall be installed at the exit of the line. The pressure gauge shall be connected to the measuring line.The flow meter shall be connected to the exhaust line of the vacuum leak detector or to the intake line of the pressureleak detector.8.1.3.3EvaluationThe test shall be deemed to have been passed if: the leak detector meets the optical and audible alarm settings given by the manufacturer which shall be basedon the calculation in 7.2.2, 7.2.3, 7.3.2 and 7.3.3; the optical and audible alarm is triggered at reaching the alarm switch point with
2 s time delay; the pump capacity of the leak detector is PAE = (80 ± 15) l/h at the alarm setting; the device or the components do not fail during the load tests.SIST EN 13160-2:2003



EN 13160-2:2003 (E)108.1.3.4Test method for pressure switch settingsThe pressure or vacuum produced by the leak detector shall be tested by measuring the settings in accordance withthe tolerances given by the manufacturerpump on pPEpump off pPAalarm on pAEalarm off pAAThe test vessel shall be slowly ventilated depending on the type of the leak detector in such a way that the values tobe determined can be read on the manometer which is connected to the measuring line of the leak detector, seeFigure 2. The measurement shall be carried out at a temperature of (20 ± 5) C.Key1Measuring device for pressure2Counter3Leak detector4Alarm (visual and audible)5Pump, required for leak detectors without integrated pump6Suction or pressure line, required for leak detectors without integrated pump7Throttle valve8Suction or pressure linelength = 2 m9Test vessel; 1 l10Environmental chamber11Measuring line; length = 2 mFigure 2 — Test set-up for the type testSIST EN 13160-2:2003



EN 13160-2:2003 (E)11 Plotting of the characteristic curve of the pressure leak detectorThe characteristic curve of the generator of pressure at the installed state shall be determined at a temperature of(20 ± 5) C.The ability to maintain the restricted volume flow rate at (85 ± 15) l/h air shall be tested at the alarm settings. Thetesting shall be carried out in accordance with Figure 3 in which the measuring instrument for the volume flow shall beconnected to the pressure line of the pressure leak detector, in which the measuring line shall be open to theatmosphere. The pressure shall be determined depending on the volume flow. The volume flow shall be varied slowlyin steps of 10 l/h until the total capacity of the pressure pump is reached.The measured values shall be described and analyzed in a pressure-volume-
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