EN 1825-2:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Y]GUåHYDQMHAbscheideranlagen für Fette - Teil 2: Wahl der Nenngröße, Einbau, Betrieb und WartungInstallations de séparation de graisses - Partie 2: Choix des tailles nominales, installation, service et entretienGrease separators - Part 2: Selection of nominal size, installation, operation and maintenance13.060.30Odpadna vodaSewage waterICS:Ta slovenski standard je istoveten z:EN 1825-2:2002SIST EN 1825-2:2002en01-december-2002SIST EN 1825-2:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1825-2February 2002ICS 13.060.30English versionGrease separators - Part 2: Selection of nominal size,installation, operation and maintenanceInstallations de séparation de graisses - Partie 2: Choix destailles nominales, installation, service et entretienAbscheideranlagen für Fette - Teil 2: Wahl der Nenngröße,Einbau, Betrieb und WartungThis European Standard was approved by CEN on 29 September 2001.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,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1825-2:2002 ESIST EN 1825-2:2002

Calculation of maximum wastewater flow Qs.10A.1Calculation based on equipment/fittings discharging into the separator.10A.1.1General.10A.1.2Maximum wastewater flow rate Qs.10A.2Method based upon the type of establishment discharging into the separator.11A.2.1General.11A.2.2Maximum wastewater flow rate Qs.11Annex B (informative)
Densities of greases and oils.14Annex C (informative)
Examples of determining nominal size of grease separator.16C.1Examples of calculation based on equipment/fittings discharging into the separator.16C.2Examples of calculation based on the type of establishment discharging into the separator.21Annex D (informative)
Measures to prevent grease accumulating and grease build-up in the pipelinesupstream of the grease separator.26Bibliography.27SIST EN 1825-2:2002

based upon the type of establishment discharging into the grease separator, ord) special calculation for individual cases, if acceptable by the regulatory authority.Where data is available to determine Qs by b) or c), and the designer is unsure of the most appropriate option ofuse, it is recommended that the higher of the flow rates determined from both calculations is used.6.2.2 Temperature factor ftHigh wastewater temperature reduces the efficiency of grease separators. Temperature factors ft are given inTable 1.Table 1 — Temperature factor ftTemperature of wastewater at inlet°CTemperature factor ft1,0always or occasionally > 601,36.2.3 Density factor fdA density factor fd = 1,0 shall be used for wastewater discharged from kitchens, abattoirs and meat and fishprocessing plants.When the nature of grease/oil is well known, the density coefficient may be taken from Figure 1, where fd is plottedfor a range of different grease and oil densities.For grease/oil densities > 0,94 g/cm3, a density factor of 1,5 shall be used.Densities of different fats and oils are given in annex B.SIST EN 1825-2:2002
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