SIST EN 806-3:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Technische Regeln für Trinkwasser-Installationen - Teil 3: Berechnung der Rohrinnendurchmesser - Vereinfachtes VerfahrenSpécifications techniques relatives aux installations d'eau destinée a la consommation humaine a l'intérieur des bâtiments - Partie 3: Dimensionnement - Méthode simplifiéeSpecifications for installations inside buildings conveying water for human consumption - Part 3: Pipe sizing - Simplified method91.140.60Sistemi za oskrbo z vodoWater supply systems13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 806-3:2006SIST EN 806-3:2006en01-oktober-2006SIST EN 806-3:2006SLOVENSKI
STANDARD



SIST EN 806-3:2006



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 806-3April 2006ICS 91.140.60 English VersionSpecifications for installations inside buildings conveying waterfor human consumption - Part 3: Pipe sizing - Simplified methodSpécifications techniques relatives aux installations d'eaudestinée à la consommation humaine à l'intérieur desbâtiments - Partie 3: Calculations des diamètres intérieurs -Méthode simplifiéeTechnische Regeln für Trinkwasser-Installationen -Berechnung der Rohrinnendurchmesser - Teil 3:Vereinfachtes VerfahrenThis European Standard was approved by CEN on 3 February 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 806-3:2006: ESIST EN 806-3:2006



EN 806-3:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms, symbols and units.4 4 Principles of pipe sizing calculations.5 5 Simplified method of pipe sizing.6 6 Special-installations.8 Annex A (informative)
Example for the determination of pipe sizes for standard-installations.9 Annex B (informative)
Design flow rates in relation to total flow rates.12 Annex C (informative)
List of national pipe sizing methods.14
SIST EN 806-3:2006



EN 806-3:2006 (E) 3 Foreword This European Standard (EN 806-3:2006) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. 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 October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. NOTE This is the third part of the European Standard (EN 806) consisting of five parts as follows: Part 1: General Part 2: Design Part 3: Pipe sizing Part 4: Installation Part 5: Operation and maintenance According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 806-3:2006



EN 806-3:2006 (E) 4 1 Scope This European Standard is in conjunction with EN 806-1 and EN 806-2 for drinking water systems within premises. This European Standard describes a calculation method for the dimensioning of pipes for the type of drinking water standard-installations as defined in 4.2. It contains no pipe sizing for fire fighting systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1: General EN 806-2, Specifications for installations inside buildings conveying water for human consumption — Part 2: Design 3 Terms, symbols and units This Clause is enlarged in completion to EN 806-1, to have in the field of pipe sizing the same definitions in European standards. Table 1 — Terms and definitions Term Symbol Unit Explanation (definition) Flow-velocity v m/s
Flow-rate, volume flow Q l/s m3/h Ratio of the volume of water passing through a specified flow cross-section and the time required for this Minimum flow-rate at draw-off point Qmin l/s Flow-rate at draw-off point which is just sufficient for the appliance to function Draw-off flow-rate QA l/s Assumed draw-off flow-rate at appliance for calculation purposes Total flow-rate QT l/s Σ QA, sum of all draw-off flow-rates of the water appliances supplied Design flow-rate QD l/s Flow-rate for hydraulic calculations, taking into consideration the probable simultaneous demand Static pressure pR Pa Gauge pressure at a measuring point in the water supply system when no water flowing Flow pressure pFl Pa Gauge pressure at a measuring point in the water supply system when water flowing Minimum flow pressure pminFl Pa Gauge pressure required at the connection to a draw-off point at its draw-off flow-rate Pressure difference, head loss ∆p Pa Difference in pressure between two points in the drinking water installation, resulting from wall friction and individual head loss
(To be continued)SIST EN 806-3:2006



EN 806-3:2006 (E) 5
Table 1 (concluded) Term Symbol Unit Explanation (definition) Head loss as a consequence of difference in elevation ∆pe Pa - Pipe length I m - Internal diameter of pipe di mm - External diameter of pipe da mm - Wall thickness of pipe s mm - Loading unit LU 1 Factor taking into account the flow-rate required at an appliance, the length of time the appliance is in use and the frequency of use. One loading unit (1 LU) equalises a draw-off flow rate QA of 0,1 l/s.
4 Principles of pipe sizing calculations 4.1 General Pipe sizing takes into consideration the character of the installation, the pressure conditions and the flow velocities. This part includes the underground pipes within the premises. 4.2 Characters of installations In a building there are standard-installations and special-installations. An installation can be called a standard-installation, when: • the draw off flow rates do not exceed those set out in Table 2; • the kind of demand does not exceed the design flow-rate as shown in Figure B.1 (see Annex B); • it is not designed for continuous use of water. Continuous use being defined as use lasting more than
15 min. Other installations are called special-installations. 4.3 Pressure conditions Static pressure at draw off point max. 500 kPa
(Exception: garden/garage taps max. 1 000 kPa); Flow pressure at draw off point min. 100 kPa. Several draw off points, e.g. thermostatic mixing valves, need a higher flow pressure. Calculations have to consider this matter. The difference between the static pressure at the lowest draw off point and the flow pressure at the hydraulic worst-case draw off point, reduced by the pressure losses (resulting from wall frictions and individual head losses), give the possible head of difference in elevation within a pressure section. SIST EN 806-3:2006



EN 806-3:2006
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