EN 16932-1:2018

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Entwässerungssysteme außerhalb von Gebäuden - Pumpsysteme - Teil 1: Allgemeine AnforderungenRéseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Systèmes de pompage - Partie 1 : Exigences généralesDrain and sewer systems outside buildings - Pumping systems - Part 1: General requirements93.030Zunanji sistemi za odpadno vodoExternal sewage systemsICS:Ta slovenski standard je istoveten z:EN 16932-1:2018SIST EN 16932-1:2018en,fr,de01-junij-2018SIST EN 16932-1:2018SLOVENSKI
STANDARDSIST EN 1671:1998SIST EN 1091:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16932-1
April
t r s z ICS
{ uä r u r Supersedes EN
s r { sã s { { xá EN
s x y sã s { { yEnglish Version
Drain and sewer systems outside buildings æ Pumping systems æ Part
sã General requirements Réseaux d 5évacuation et d 5assainissement à l 5extérieur des bâtiments æ Systèmes de pompage æ Partie
sã Exigences générales
Entwässerungssysteme außerhalb von Gebäuden æ Pumpsysteme æ Teil
sã Allgemeine Anforderungen This European Standard was approved by CEN on
t t January
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x { u tæ sã t r s z ESIST EN 16932-1:2018

Figure 1 —Relationship to EN 752:2017 and other drain and sewer standards [Source: EN 752:2017] Wastewater lifting installations in buildings and on private properties are in the scope of EN 12050 (all parts). SIST EN 16932-1:2018

3.1 collection chamber chamber containing a collection tank and associated pump or interface valve unit 3.2 controller device that activates a pump or interface valve 3.3 duty point target values of the total head or pressure of the pump and the rate of flow for which the pump is designed or selected [SOURCE: EN ISO 17769-1:2012, 2.1.13.1] 3.4 forwarding pump pump transporting wastewater from a vacuum system to a wastewater treatment plant, or another drain or sewer system SIST EN 16932-1:2018

Key 1 incoming gravity sewer 4 manhole 2 pumping station 5 downstream gravity sewer 3 rising main
Figure 2 —Example of a single pumping station system 6.3 Lift stations 6.3.1 General A lift station is a type of pumping station where the discharge point is in the same location as the pumping station. It can include a short, essentially vertical, rising main. Alternatively, lift stations may comprise a screw pump. Lift stations can be used: — to transfer flow between adjacent gravity sewers at different levels; — to lift flows into a wastewater treatment plant or; — to lift surface water flows into an adjacent surface receiving water body. 6.3.2 Pumping stations with screw pumps Pumping stations with screw pumps (see Figure 3) can be used where it is only necessary to lift the wastewater without the need to generate pressure. Pumping stations with screw pumps can be used where the lift is limited to a few metres and where there is little variation in the water level at the discharge. They are resistant to blockage. SIST EN 16932-1:2018

Key 1 screw 3 upper bearing 2 pump motor 4 lower bearing Figure 3 — Example of a lift station with screw pumps 6.4 Pressure sewer systems A pressure sewer system comprises a single pressure pipe or a branched or grid network of pressure pipes. A pressure sewer system is designed to collect and transport domestic or industrial wastewater. It is not usually used for the collection and transport of surface water. Pumping stations are connected to the pressure pipe(s). The downstream boundary of the system is the point where the total flow from the system discharges into a downstream system (e.g. into a gravity sewer, a manhole or wastewater treatment plant). A typical house connection to a pressure sewer system is shown in Figure 4. An example of a plan of a typical pressure sewer system is shown in Figure 5.
Key 1 drain 4 isolation valve (alternative positions) 2 pump unit 5 rising main connection 3 collection tank 6 rising main Figure 4 —Typical house connection to a pressure sewer system SIST EN 16932-1:2018

Key 1 gravity drain 3 rising main connection 2 pumping station 4 rising main Figure 5 —Plan of typical pressure sewer system 6.5 Vacuum sewer systems A vacuum sewer system comprises a vacuum sewer, or a network of vacuum sewers and vacuum drains, connecting a number of collection chambers to a single vacuum station. A vacuum sewer system is designed to collect domestic and industrial wastewater and is not usually used for the collection of surface water. Vacuum mains have a vertical profile containing slope sections (sections that slope downwards in the direction of flow) followed by lift sections (see Figure 6).
Key 1 collection chamber 4 lift section 2 vacuum pipeline 5 vacuum station 3 slope section
Figure 6 — Vacuum sewer system SIST EN 16932-1:2018

Key 1 gravity drain 3 vacuum drain 2 collection chamber 4 vacuum sewer Figure 7 —Typical house connection to a vacuum sewer system A vacuum station is provided with a vacuum vessel, vacuum generators maintaining sub-atmospheric (vacuum) pressure in the vacuum vessel, and forwarding pumps that draw wastewater from the vacuum vessel and pump it through a rising main to the downstream system. Sub-atmospheric pressure is transmitted from the vacuum vessel through upstream vacuum sewers and vacuum drains to collection chambers (see Figure 7). An interface valve is provided in each collection chamber keeping the vacuum drain usually closed. When a batch volume of wastewater has been drained by gravity into the collection chamber, a level sensor activates a controller that opens an interface valve for an adjustable time period. A batch volume is evacuated from the collection tank through a vacuum drain into the vacuum sewer. After the collection tank is emptied and some air has been admitted, the controller closes the interface valve. The admitted air pushes the wastewater along the vacuum sewer towards the vacuum station until gravitational and frictional forces bring it to rest at a low point in the vacuum sewer where the wastewater collects completely filling the pipe. When another upstream interface valve opens, some more wastewater and atmospheric air is admitted and the air pressure in the upstream vacuum sewer rises until it pushes the accumulated wastewater as a plug from the low point up the lift section and towards the vacuum station until it comes to rest again at the next low point, and so on. Finally, the wastewater flows into the vacuum vessel wherefrom it is pumped through a rising main towards the wastewater treatment plant or downstream sewer system. Since there is more air than wastewater in a vacuum sewer, and because the wastewater is well aerated, the wastewater is kept aerobic and the formation of septic wastewater is prevented. Because the water plugs are accelerated to a velocity of several meters per second, the system is self-cleansing. Because vacuum sewers are always kept at sub-atmospheric pressure, exfiltration of wastewater cannot occur. 6.6 Selection The selection of the most appropriate type of system should take account of EN 752:2017, 6.4.3, as well as the following technical considerations. a) A single pumping station system or lift station should be considered where: 1) the flow volumes to be pumped are large; SIST EN 16932-1:2018

These performance requirements can include, for example: a) flooding shall be limited to prescribed frequencies; b) discharges from combined sewer overflows and emergency overflows shall be limited to prescribed frequencies and volumes; c) the effect of the flows from the pumping system on the downstream sewer system and wastewater treatment plants shall be considered. The design criteria for the pumping system shall be determined in accordance with EN 752:2017, 5.3. The design criteria shall ensure that the drain and sewer system meets these performance requirements and shall be included in the project specification for the pumping system developed in accordance with EN 752:2017, 6.5, and the EN 14654 series.
Examples of these criteria include: I) the quantity of the flows and the range of flow rates (e.g. peak, minimum, average diurnal, dry/wet weather, etc.) and the range of heads, any expected future requirements and the expected timing of these requirements; II) the nature of the incoming flows that could influence the design of the pumping system (e.g. the presence of corrosive or erosive materials, the potential for blockage, or the likelihood of potentially explosive atmospheres, or the formation of septic wastewater); III) any requirements to limit the risk of failure; IV) identification of special conditions (e.g. aquifer protection zones). There are also general performance requirements for pumping systems. These can relate to the following criteria: 1) surcharging of collection tanks or sewers above the design top water level; 2) the reliability and redundancy requirement of the equipment; 3) noise, odour and other nuisances; 4) the formation of septic wastewater; SIST EN 16932-1:2018

The principal factors to be considered shall include: a) possible locations for connecting to existing sewer systems; b) environmental considerations including the potential impact on any environmentally sensitive areas and the siting of any overflows; c) access to pumping stations, vacuum stations, valve chambers and collection tanks and collection chambers for maintenance and inspection; d) land ownership; e) availability of power, water supply and telecommunications; f) risk of flooding from external sources and from the sewer system; g) suitability of geotechnical conditions. 7.3.2 Location of pumping stations and vacuum stations The requirements for the site and the location of a pumping or vacuum station shall be determined taking into account the following criteria: a) estimated size of the station, taking into account the type and layout of the station and the equipment it contains; b) space for detention tanks, screens or grit chambers (if required); c) space for future expansion; SIST EN 16932-1:2018

Sources of odour can include: a) exhaust air from vacuum generators; b) air displaced from collection tanks by incoming flow; c) air valves in rising mains; d) discharge points of rising mains. Odour control measures should be in accordance with the recommendations given in EN 12255-9 as applicable. 8.3.5 Visual impact National or local regulations or the relevant authority can specify requirements regarding the visual impact of pumping stations or vacuum stations. 8.4 Structural design The structural design of tanks, valve chambers and buildings shall be in accordance with EN 1990 and the EN 1991 series, if applicable, or otherwise in accordance with relevant product standards, and shall take account of: SIST EN 16932-1:2018
...