SIST EN 16933-2:2017
(Main)Drain and sewer systems outside buildings - Design - Part 2: Hydraulic design
Drain and sewer systems outside buildings - Design - Part 2: Hydraulic design
This European Standard specifies requirements for the design of drain and sewer systems outside buildings.
It is applicable to drain and sewer systems, which operate essentially under gravity, from the point where the wastewater leaves a building, roof drainage system, or paved area, to a point where it is discharged into a wastewater treatment plant or receiving water body.
This document specifies requirements for the hydraulic design of drain and sewer systems and the assessment of the capacity of existing drain and sewer systems.
Entwässerungssysteme außerhalb von Gebäuden - Planung - Teil 2: Hydraulische Berechnung
Diese Europäische Norm legt Anforderungen an die Bemessung von Entwässerungssystemen außerhalb von Gebäuden fest.
Sie gilt für Entwässerungssysteme, die von dem Punkt an, an dem das Abwasser das Gebäude bzw. die Dachentwässerung oder einen befestigten Bodenbereich verlässt, bis zu dem Punkt, an dem das Abwasser in eine Kläranlage oder ein aufnehmendes Oberflächengewässer eingeleitet wird, hauptsächlich als Frei-spiegel¬systeme betrieben werden.
Dieses Dokument legt Anforderungen an die hydraulische Berechnung von Entwässerungssystemen und die Beurteilung der Kapazität vorhandener Entwässerungssysteme fest.
Réseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Conception - Partie 2 : Conception hydraulique
La présente Norme européenne spécifie les prescriptions relatives aux réseaux d’évacuation et d’assainissement à l’extérieur des bâtiments.
Elle s’applique aux réseaux d’évacuation et d’assainissement, principalement des réseaux gravitaires, à partir du point où les eaux usées quittent un bâtiment, un système d’évacuation de toiture ou une surface revêtue, jusqu’au point où elles se déversent dans une station d’épuration ou un milieu récepteur aquatique.
Le présent document spécifie les prescriptions relatives à la conception hydraulique des réseaux d’évacuation et d’assainissement et à l’évaluation de la capacité des réseaux d’évacuation et d’assainissement existants.
Sistemi za odvod odpadne vode in kanalizacijo zunaj stavb - Načrtovanje - 2. del: Hidravlično dimenzioniranje
Ta evropski standard določa zahteve za sisteme za odvod odpadne vode in kanalizacijo zunaj stavb.
Uporablja se za sisteme za odvod odpadne vode in kanalizacijo zunaj stavb, ki delujejo zlasti s pomočjo gravitacije, od točke, kjer odpadne vode zapustijo stavbo, strešni drenažni sistem ali tlakovano območje, do točke, kjer se izlivajo v čistilne naprave za gospodinjske odplake ali sprejemajoče vodno telo.
Ta dokument določa zahteve za hidravlično dimenzioniranje sistemov za odvod odpadne vode in kanalizacijo ter oceno zmogljivosti obstoječih sistemov za odvod odpadne vode in kanalizacijo.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 16933-2:2017
01-november-2017
6LVWHPL]DRGYRGRGSDGQHYRGHLQNDQDOL]DFLMR]XQDMVWDYE1DþUWRYDQMHGHO
+LGUDYOLþQRGLPHQ]LRQLUDQMH
Drain and sewer systems outside buildings - Design - Part 2: Hydraulic design
Entwässerungssysteme außerhalb von Gebäuden - Planung - Teil 2: Hydraulische
Berechnung
Réseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Conception -
Partie 2 : Conception hydraulique
Ta slovenski standard je istoveten z: EN 16933-2
ICS:
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
SIST EN 16933-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 16933-2:2017
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SIST EN 16933-2:2017
EN 16933-2
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 93.030
English Version
Drain and sewer systems outside buildings - Design - Part
2: Hydraulic design
Réseaux d'évacuation et d'assainissement à l'extérieur Entwässerungssysteme außerhalb von Gebäuden -
des bâtiments - Conception - Partie 2 : Conception Planung - Teil 2: Hydraulische Planung
hydraulique
This European Standard was approved by CEN on 30 July 2017.
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 CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16933-2 E
worldwide for CEN national Members.
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SIST EN 16933-2:2017
EN 16933-2:2017 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols and units . 10
5 General . 11
6 Design criteria . 12
7 Hydraulic capacity of pipelines . 12
7.1 Introduction . 12
7.2 Pipeline headlosses . 12
7.2.1 General . 12
7.2.2 The Colebrook-White formula. 12
7.2.3 The Manning formula . 13
7.2.4 Pipeline roughness values . 13
7.2.5 Pipeline headloss values . 13
7.3 Local headlosses . 13
7.4 Total headlosses . 13
8 Incoming flows . 14
8.1 Foul wastewater flows . 14
8.1.1 General . 14
8.1.2 Calculation of foul wastewater flow rates based on the appliances connected . 14
8.1.3 Calculation of foul wastewater flow rates from population and average flows . 14
8.2 Rainfall and runoff from precipitation . 15
8.2.1 Rainfall . 15
8.2.2 Runoff . 15
8.3 Extraneous flows . 16
9 Hydraulic calculation of drain and sewer systems . 17
9.1 General . 17
9.2 Flow in sewer systems . 17
9.3 Flow simulation methods . 19
9.3.1 Introduction . 19
9.3.2 Simple/empirical methods . 19
9.3.3 Other simplified methods . 19
9.3.4 Dynamic wave methods . 19
9.3.5 Selection of calculation method . 19
9.4 Surface flood routing . 20
9.5 Validation of models . 20
10 Hydraulic design . 21
10.1 Capacity of drains and sewers . 21
10.1.1 General . 21
10.1.2 Foul drains and sewers . 21
10.1.3 Surface water drains and sewers . 21
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10.1.4 Combined drains and sewers . 22
10.2 Design for self-cleansing . 22
10.2.1 Sediment transport . 22
10.2.2 Minimization of blockages . 22
10.3 Sewers with steep gradients . 23
10.4 Surface water inlets . 23
10.5 Separators, screens and pretreatment devices . 23
10.5.1 General . 23
10.5.2 Control of sediments. 24
10.5.3 Control of grease and fats . 24
10.5.4 Control of light liquids . 25
10.5.5 Treatment of surface water to remove dissolved pollutants . 25
10.5.6 Screening . 26
10.6 Infiltration drainage systems . 26
10.7 Evaporation systems . 26
10.8 Manholes and inspection chambers . 26
10.9 Combined sewer overflows . 27
10.10 Tanks and ponds . 27
10.10.1 General . 27
10.10.2 Detention tanks . 27
10.10.3 Ponds . 28
10.11 Outfalls . 28
11 Sources of additional information . 28
Annex A (informative) Sources of additional information . 29
A.1 National Standards Bodies . 29
A.2 Austria . 29
A.2.1 Regulatory Bodies . 29
A.2.2 Other organisations . 29
A.3 Denmark . 29
A.3.1 Regulatory Bodies . 29
A.3.2 Other organisations . 30
A.4 France . 31
A.4.1 Regulatory Bodies . 31
A.4.2 Other organisations . 31
A.5 Germany . 31
A.5.1 Regulatory Bodies . 31
A.5.2 Other organisations . 32
A.6 Ireland . 32
A.6.1 Regulatory Bodies . 32
A.7 Italy . 33
A.7.1 Regulatory Bodies . 33
A.7.2 Other organisations . 33
A.8 The Netherlands . 33
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A.8.1 Regulatory Bodies . 33
A.8.2 Other organisations . 33
A.9 Norway . 34
A.9.1 Regulatory Bodies . 34
A.9.2 Other organisations . 34
A.10 Portugal . 34
A.10.1 Regulatory Bodies . 34
A.10.2 Other organisations . 35
A.11 Sweden . 35
A.11.1 Regulatory Bodies . 35
A.11.2 Other organisations . 35
A.12 Switzerland . 35
A.12.1 Regulatory Bodies . 35
A.12.2 Other organisations . 36
A.13 United Kingdom . 36
A.13.1 Regulatory Bodies . 36
A.13.1.1 General . 36
A.13.1.2 England . 36
A.13.1.3 Wales . 37
A.13.1.4 Scotland . 37
A.13.1.5 Northern Ireland . 38
A.13.2 Other organisations . 38
Bibliography . 40
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EN 16933-2:2017 (E)
European foreword
This document (EN 16933-2:2017) has been prepared by Technical Committee CEN/TC 165
“Wastewater engineering”, 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 or by endorsement, at the latest by March 2018 and conflicting national standards shall be
withdrawn at the latest by March 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This European Standard EN 16933, Drain and sewer systems outside buildings — Design, contains the
following parts:
1)
— Part 1: Physical design
— Part 2: Hydraulic design.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1)
Currently in preparation.
5
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EN 16933-2:2017 (E)
Introduction
Drain and sewer systems are part of the overall wastewater system that provides a service to the
community. This can be briefly described as:
— removal of wastewater from premises for public health and hygienic reasons;
— prevention of flooding in urbanised areas;
— protection of the environment.
The overall wastewater system has four successive functions:
— collection;
— transport;
— treatment;
— discharge.
Collection and transport of wastewater is provided by drain and sewer systems.
EN 752:2017 provides a framework for the design, construction, maintenance, operation and
rehabilitation of drain and sewer systems outside buildings. This is illustrated in the upper part of the
diagram in Figure 1. EN 752:2017 is supported by more detailed standards for the investigation, design,
construction, organization and control of drain and sewer systems.
Investigation and assessment standards include:
— EN 13508, Investigation and assessment of drain and sewer systems outside buildings.
Design and construction standards include:
2)
— EN 16932 , Drain and sewer systems outside buildings — Pumping systems;
3)
— EN 16933 , Drain and sewer systems outside buildings — Design;
4)
— EN 1295 , Structural design of buried pipelines under various conditions of loading;
— EN 1610, Construction and testing of drains and sewers;
— EN 12889, Trenchless construction and testing of drains and sewers;
— EN 15885, Classification and characteristics of techniques for renovation, repair and replacement of
drains and sewers.
Management and control standards include:
— EN 14654, Management and control of operational activities in drain and sewer systems outside
buildings.
2)
Currently in preparation.
3)
Currently in preparation.
4)
Currently in preparation.
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EN 16933-2:2017 (E)
Figure 1 — Relationship to EN 752:2017 and other drain and sewer standards [Source
EN 752:2017]
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1 Scope
This European Standard specifies requirements for the design of drain and sewer systems outside
buildings.
It is applicable to drain and sewer systems from the point where the wastewater leaves a building, roof
drainage system, or paved area, to a point where it is discharged into a wastewater treatment plant or
receiving water body.
This document specifies requirements for the hydraulic design of drain and sewer systems and the
assessment of the capacity of existing drain and sewer systems.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 858-1, Separator systems for light liquids (e.g. oil and petrol) — Part 1: Principles of product design,
performance and testing, marking and quality control
EN 858-2:2003, Separator systems for light liquids (e.g. oil and petrol) — Part 2: Selection of nominal size,
installation, operation and maintenance
EN 1825-1, Grease separators — Part 1: Principles of design, performance and testing, marking and
quality control
EN 1825-2:2002, Grease separators — Part 2: Selection of nominal size, installation, operation and
maintenance
EN 16323:2014, Glossary of wastewater engineering terms
EN 752, Drain and sewer systems outside buildings — Sewer system management
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323, EN 752 and the
following apply.
NOTE 1 Certain key definitions from EN 16323:2014 have been repeated below for clarity. The following
additional terms used in this document are defined in EN 16323:
backdrop manhole; catchment area; combined sewer overflow;
combined system; detention tank; domestic wastewater;
drain; dry weather flow; extraneous flow;
foul wastewater; gradient; gravity system;
hydro-biological stress; industrial wastewater; infiltration (see Figure 2);
inspection chamber; inverted syphon; maintenance;
manhole; outfall; ramp manhole;
receiving water body; rehabilitation; relevant authority;
renovation; repair; replacement;
rising main; runoff coefficient; self-cleansing;
self-purifying capacity; separate system; septic wastewater;
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sewer; sewer system; surcharge; tank sewer;
time of concentration; time of flow; wastewater treatment plant.
NOTE 2 The following additional terms used in this document are defined in EN 752:2017:
expected frequency
flooding
rainfall intensity
3.1
depression storage
precipitation retained in surface hollows that does not contribute to runoff
3.2
rainwater
water arising from atmospheric precipitation, which has not yet collected matter from the surface
Note 1 to entry: See Figure 2.
[SOURCE: EN 16323:2014, 2.1.1.1]
3.3
runoff
water from precipitation that flows off a surface to reach a drain, sewer or receiving water
Note 1 to entry: See Figure 2.
[SOURCE: EN 16323:2014, 2.1.1.2]
3.4
sub-critical flow
state of flow when the water velocity is less than the velocity of the small surface wave with water
levels tending to be stable
3.5
super-critical flow
state of flow when the water velocity is greater than the velocity of the small surface wave with violent
fluctuations in water level being possible
3.6
surface receiving water body
receiving water body that is on the surface of the ground (e.g. river, lake or sea)
Note 1 to entry: See Figure 2.
[SOURCE: EN 16323:2014, 2.1.3.7]
3.7
surface water
water from precipitation, which has not seeped into the ground and is discharged to the drain or sewer
system directly from the ground or from exterior building surfaces (see Figure 2)
[SOURCE: EN 16323:2014, 2.1.1.3]
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Key
1 rain water
2 runoff
3 surface water
4 infiltration
5 surface receiving water body
Figure 2 — Terminology for flows derived from rain water [Source EN 16323:2014]
3.8
vortex manhole
circular manhole within which a large difference in level is accommodated by the wastewater entering
tangentially and descending helically
3.9
wastewater
water composed of any combination of water discharged from domestic, industrial or commercial
premises, surface run-off and accidentally any sewer infiltration water
[SOURCE: EN 16323:2014, 2.3.10.65]
4 Symbols and units
For the purposes of this document, the following symbols and units apply.
A is the area receiving rainfall (measured horizontally), in hectares [ha]
c
A is the flow cross-section perpendicular to the invert of the drain or sewer, in metres squared
f
2
[m ]
C is the runoff coefficient (between 0,0 and 1,0), dimensionless [-]
s
c is the factor with inclusion of additional losses, dimensionless [-]
D is the internal diameter of the pipe (bore), in metres [m]
g 2
is the acceleration due to gravity, in metres per second squared [m/s ]
h is the local headloss in bends, valves and other fittings, in metres [m]
f
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h the pipeline head loss due to friction, in the pipe in metres [m]
p
i is the rainfall intensity, in litres per second and hectare [l/s/ha]
J is the hydraulic gradient (energy loss per unit length), dimensionless [-]
E
J
...
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