EN 12255-1:2002

Wastewater treatment plants - Part 1: General construction principles

This European Standard specifies general requirements for structures and equipment as they relate to wastewater treatment plants for a total population of more than 50 PT.
The primary application is designed for wastewater treatment plants for the treatment of domestic and municipal wastewater.
Requirements for structures which are not specific for wastewater treatment plants are not within the scope of this European Standard. Other ENs can apply.
Equipment which is not solely used in wastewater treatment plants is subject to the applicable product standards. However, specific requirements for such equipment when used in wastewater treatment plants are included in this part.
General principles of building construction, mechanical and electrical engineering are not subject of this standard.
This European Standard does not cover the design of treatment processes.
Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental information about the systems; this standard has not attempted to specify all available systems.
Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.

Kläranlagen - Teil 1: Allgemeine Baugrundsätze

Diese Europäischen Norm legt allgemeine Baugrundsätze für Bauwerke und die technische Ausrüstung von Kläranlagen für mehr als 50 EW fest.
Diese Europäische Norm ist in erster Linie auf Kläranlagen für die Behandlung von häuslichem und kommunalem Abwasser anzuwenden.
Anforderungen an Bauwerke, die nicht spezifisch für Kläranlagen sind, sind nicht Gegenstand dieser Norm. Andere Europäische Normen können hierfür gelten.
Für technische Ausrüstung, die nicht ausschließlich auf Kläranlagen eingesetzt wird, sind die einschlägigen Produktnormen zu beachten. Besondere Anforderungen an diese technische Ausrüstung hinsichtlich ihres Einsatzes auf Kläranlagen sind allerdings Gegenstand dieser Europäischen Norm.
Allgemeine Grundsätze des Bau- und Maschinenwesens sowie der Elektrotechnik sind nicht Gegenstand dieser Europäischen Norm.
Diese Europäische Norm bezieht sich nicht auf die Auslegung von Abwasserreinigungsverfahren.
Die Unterschiede in Planung und Bau von Kläranlagen in Europa haben zu einer Vielzahl von Anlagenausführungen geführt. Diese Europäische Norm enthält grundsätzliche Angaben zu den Anlagenausführungen; sie beschreibt jedoch nicht alle Einzelheiten jeder Ausführungsart.
Die in den Literaturhinweisen aufgeführten Unterlagen enthalten Einzelheiten und Hinweise, die im Rahmen dieser Norm verwendet werden dürfen.

Stations d'épuration - Partie 1: Principes généraux de construction

La présente Norme européenne spécifie des prescriptions générales pour les structures et l'équipement relatifs aux stations d'épuration des eaux usées pour plus de 50 (EH).
Elle s'applique en priorité aux stations d'épuration des eaux usées destinées au traitement des eaux usées domestiques et municipales.
Les prescriptions structurelles qui ne sont pas spécifiques aux stations d'épuration ne font pas partie du domaine d'application de cette norme. D'autres normes européennes peuvent s'y appliquer.
Les équipements qui ne sont pas utilisés uniquement dans les stations d'épuration sont soumis à l'application des normes de produit correspondantes. Néanmoins, les prescriptions particulières à ces équipements, lorsqu'ils sont utilisés dans les stations d'épuration, peuvent être incluses dans la présente norme.
Les principes généraux de construction et d'ingénierie mécanique et électrique ne sont pas traités dans cette norme.
La présente Norme ne concerne pas la conception du procédé de traitement.
Des différences en matière de traitement des eaux résiduaires à travers l'Europe ont conduit au développement de systèmes variés. La présente Norme donne des informations de base sur les systèmes et n'a pas eu pour objectif d'essayer de spécifier tous les systèmes disponibles.
Des informations détaillées, complémentaires à celles contenues dans la présente Norme, peuvent être obtenues en se reportant à la bibliographie.

Čistilne naprave za odpadno vodo – 1. del: Splošna načela gradnje

General Information

• Status: Published
• Publication Date: 15-Jan-2002
• ICS: 13.060.30 - Sewage water
• Technical Committee: CEN/TC 165 - Waste water engineering
• Drafting Committee: CEN/TC 165/WG 40 - Wastewater treatment plants > 50 PT
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Completion Date: 31-Aug-2022
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: SIST EN 12255-1:2002 - Wastewater treatment plants - Part 1: General construction principles

Relations

• Revised: EN 12255-1:2024 - Wastewater treatment plants - Part 1: General design and construction principles
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2002
ýLVWLOQHQDSUDYH]DRGSDGQRYRGR±GHO6SORãQDQDþHODJUDGQMH
Wastewater treatment plants - Part 1: General construction principles
Kläranlagen - Teil 1: Allgemeine Baugrundsätze
Stations d'épuration - Partie 1: Principes généraux de construction
Ta slovenski standard je istoveten z: EN 12255-1:2002
ICS:
13.060.30 Odpadna voda Sewage water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 12255-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2002
ICS 13.060.30
English version
Wastewater treatment plants - Part 1: General construction
principles
Stations d'épuration - Partie 1: Principes généraux de Kläranlagen - Teil 1: Allgemeine Baugrundsätze
construction
This European Standard was approved by CEN on 9 November 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12255-1:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .5
2 Normative references .5
3 Terms and definitions.6
4 Requirements .7
4.1 General requirements.7
4.2 Design requirements .8
4.3 Structural requirements .8
4.3.1 General.8
4.3.2 Dimensional tolerances.9
4.3.3 Concrete tracks.9
4.3.4 Fixings and connections between equipment and structures.9
4.3.5 Access.9
4.3.6 Building ventilation.10
4.3.7 Water supply and drainage.10
4.3.8 Lifting equipment.10
4.3.9 Storage for hazardous chemicals and fuels .10
4.4 Requirements for equipment.10
4.4.1 Principles for mechanical design.10
4.4.2 General design requirements .11
4.4.3 Environmental impact .15
4.4.4 Safety .15
4.4.5 Documentation.15
4.4.6 Spare parts, special tools .15
5 Test methods.15
5.1 Function and performance.15
5.2 Tightness testing of concrete structures .16
5.3 Tightness testing of earthen basins .16
5.4 Tightness testing of other structures and equipment .16
Annex A (informative)  Explanatory notes .17
Annex B (normative)  Structural tolerances.19
B.1 Circular tank .19
B.1.1 Circular tank with scraper.19
B.1.2 Circular tank with a scraper bridge travelling on the side wall (track).19
B.2 Rectangular tank.19
Bibliography .20
Foreword
This European Standard 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 July 2002, and conflicting national standards shall be withdrawn at the latest by
December 2002.
It is the first part prepared by the Working Groups CEN/TC 165/WG 42 and 43 relating to the general requirements
and processes for treatment plants for a total number of inhabitants and population equivalents (PT) over 50. The
parts of the series are as follows:

Part 1: General construction principles

Part 3: Preliminary treatment

Part 4: Primary settlement

Part 5: Lagooning processes

Part 6: Activated sludge processes

Part 7: Biological fixed-film reactors

Part 8: Sludge treatment and storage

Part 9: Odour control and ventilation

Part 10: Safety principles

Part 11: General data required

Part 12: Control and automation

Part 13: Chemical treatment - Treatment of wastewater by precipitation/flocculation

Part 14: Disinfection

Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants
)

Part 16: Physical (mechanical) filtration
NOTE For requirements on pumping installations at wastewater treatment plants, provided initially as part 2 "Pumping
installations for wastewater treatment plants", see EN 752-6 "Drain and sewer systems outside buildings — Part 6: Pumping
installations".
The parts EN 12255-1, EN 12255-3 to EN 12255-8 and EN 12255-10 and EN 12255-11 were implemented
together as a European package (Resolution 232/2001 taken by CEN/TC 165).

1)
in preparation
This European standard is limited to general construction principles. Separate standards for special construction
principles for elements of wastewater treatment plants are covered in other parts.
Safety principles and general data required are covered in EN 12255-10 and EN 12255-11.
Annex A is informative, annex B is normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this document: Austria, Belgium, the Czech Republic, Denmark, Finland, France,
Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
1 Scope
This European Standard specifies general requirements for structures and equipment as they relate to wastewater
treatment plants for a total population of more than 50 PT.
The primary application is designed for wastewater treatment plants for the treatment of domestic and municipal
wastewater.
Requirements for structures which are not specific for wastewater treatment plants are not within the scope of this
European Standard. Other ENs can apply.
Equipment which is not solely used in wastewater treatment plants is subject to the applicable product standards.
However, specific requirements for such equipment when used in wastewater treatment plants are included in this
part.
General principles of building construction, mechanical and electrical engineering are not subject of this standard.
This European Standard does not cover the design of treatment processes.
Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This
standard gives fundamental information about the systems; this standard has not attempted to specify all available
systems.
Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 752-6, Drain and sewer systems outside buildings – Part 6: Pumping installations.
EN 809, Pumps and pump units for liquids – Common safety requirements.
EN 1085, Wastewater treatment – Vocabulary.
EN 12255-9, Wastewater treatment plants — Part 9: Odour control and ventilation.
EN 12255-10, Wastewater treatment plants – Part 10: Safety principles.
prEN 12255-12, Wastewater treatment plants — Part 12: Control and automation.
EN 60034-1, Rotating electrical machines – Part 1: Rating and performance (IEC 60034-1:1996, modified).
EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529: 1989).
ISO 3506-1, Mechanical properties of corrosion-resistant stainless-steel fasteners – Part 1: Bolts, screws and studs.
ISO 3506-2, Mechanical properties of corrosion-resistant stainless-steel fasteners – Part 2: Nuts.
ISO 3506-3, Mechanical properties of corrosion-resistant stainless-steel fasteners – Part 3: Set screws and similar
fasteners not under tensile stress.
ISO 4200, Plain end steel tubes, welded and seamless – General tables of dimensions and masses per unit length.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 1085 and the following apply.
3.1
structure
any construction and its components built for the accommodation of equipment
3.2
equipment
any component which is installed in, mounted on, attached to, or operated on structures, in the performance of their
intended function
3.3
unit
any structure including any related equipment which is used as a process stage and which can be isolated from
other parallel, upstream or downstream structures
NOTE Examples for a unit are a grit chamber, a clarifier, an aeration tank, a thickener, a digester.
3.4
assembly
mechanical equipment that can be removed and replaced as a whole
NOTE Examples for an assembly are a pump, a compressor, a gas engine, an aerator.
3.5
wastewater treatment plant
system for the purification of wastewater including structures and equipment
3.6
client
municipality, city or other organisation which intents to built a wastewater treatment plant or parts thereof, or its
representative
3.7
Bidder
company or other organisation which offers to built a plant, or to built or supply parts thereof
3.8
contractor
company or organisation which received a contract to built a plant, or to built or supply parts thereof
3.9
tracks
those parts of a structure on which wheels run
3.10
design loading Y
N
effective average loading in continuous o
...