1、 DEUTSCHE NORM July 2006DIN EN 806-3 ICS 91.140.60 Partially supersedes DIN 1988-3:1988-12 Specifications for installations inside buildings conveying water for human consumption Part 3: Pipe sizing Simplified method English version of DIN EN 806-3:2006-07 Technische Regeln fr Trinkwasser-Installati
2、onen Teil 3: Berechnung der Rohrinnendurchmesser Vereinfachtes Verfahren Englische Fassung DIN EN 806-3:2006-07 Document comprises 16 pages No part of this standard may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany
3、, has the exclusive right of sale for German Standards (DIN-Normen). English price group 9 www.din.de www.beuth.de !,p$I“11.06 9770138DIN EN 806-3:2006-07 2 National foreword This standard has been prepared by CEN/TC 164 Water supply (Secretariat: France). The responsible German body involved in its
4、 preparation was the Wasserwesen (Water Practice Standards Committee), Technical Committee 119-04-07 Husliche Wasserversorgung. The attempt to introduce, at the European level, a differentiated pipe sizing method similar to the one specified in DIN 1988-3 to be included in addition to the simplified
5、 method presented here failed during the first CEN enquiry stage. The position that only a simplified method for standard installations would be accepted during the first stage of European harmonization prevailed. For a differentiated sizing method, see the list of national pipe sizing methods given
6、 in Annex C. As a result of the situation discussed above, German experts have decided not to withdraw DIN 1988-3 but to modify it in a new edition to avoid the gap in technical information that would otherwise arise. Amendments This standard differs from DIN 1988-3:1988-12 as follows: a) This stand
7、ard specifies a simplified pipe sizing method for standard installations. b) Terminology has been harmonized with European terminology. c) A list of alternative national pipe sizing methods is given. Previous editions DIN 1988: 1930-08, 1940-09, 1955-03, 1962-01 DIN 1988-3: 1988-12 EUROPEAN STANDARD
8、 NORME EUROPENNE EUROPISCHE NORM EN 806-3 April 2006 ICS 91.140.60 English Version Specifications for installations inside buildings conveying water for human consumption - Part 3: Pipe sizing - Simplified methodSpcifications techniques relatives aux installations deau destine la consommation humain
9、e lintrieur des btiments - Partie 3: Calculations des diamtres intrieurs -Mthode simplifie Technische Regeln fr Trinkwasser-Installationen - Berechnung der Rohrinnendurchmesser - Teil 3: Vereinfachtes Verfahren This European Standard was approved by CEN on 3 February 2006. CEN members are bound to c
10、omply 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 Central
11、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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the
12、official versions. 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
13、, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nati
14、onal Members. Ref. No. EN 806-3:2006: EEN 806-3:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms, symbols and units 4 4 Principles of pipe sizing calculations5 5 Simplified method of pipe sizing6 6 Special-installations 8 Annex A (informative) Example for the determinati
15、on 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 EN 806-3:2006 (E) 3 Foreword This European Standard (EN 806-3:2006) has been prepared by Technical Committee CEN/TC
16、 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
17、 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 organi
18、zations 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, Slov
19、akia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 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
20、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 refere
21、nces, 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
22、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 R
23、atio 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 Qminl/s Flow-rate at draw-off point which is just sufficient for the appliance to function Draw-off flow-rate QAl/s Assumed draw-off flow-rate at appliance fo
24、r calculation purposes Total flow-rate QTl/s QA, sum of all draw-off flow-rates of the water appliances supplied Design flow-rate QDl/s Flow-rate for hydraulic calculations, taking into consideration the probable simultaneous demand Static pressure pRPa Gauge pressure at a measuring point in the wat
25、er supply system when no water flowing Flow pressure pFlPa Gauge pressure at a measuring point in the water supply system when water flowing Minimum flow pressure pminFlPa Gauge pressure required at the connection to a draw-off point at its draw-off flow-rate Pressure difference, head loss p Pa Diff
26、erence in pressure between two points in the drinking water installation, resulting from wall friction and individual head loss (To be continued)EN 806-3:2006 (E) 5 Table 1 (concluded) Term Symbol Unit Explanation (definition) Head loss as a consequence of difference in elevation pePa - Pipe length
27、I m - Internal diameter of pipe dimm - External diameter of pipe damm - 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
28、 flow rate QAof 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 bu
29、ilding 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 desi
30、gned 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
31、 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 pr
32、essure losses (resulting from wall frictions and individual head losses), give the possible head of difference in elevation within a pressure section. EN 806-3:2006 (E) 6 4.4 Maximum flow velocities The figures given in Table 3 are based on the following flow velocities: header pipes, rising pipes,
33、floor service pipes max. 2,0 m/s; connection pipes to one fitting (dead legs) max. 4,0 m/s. NOTE National regulations may require lower flow velocities to avoid water hammer and noise. 5 Simplified method of pipe sizing 5.1 General This clause shows a possibility for a simplified pipe sizing for sta
34、ndard-installations. This method can be used for all type of buildings, which do not have measurements, which highly exceed the average. That means that in most of the buildings the simplified method can be applied. This method is equally used for cold and for hot water pipes. 5.2 Detailed calculati
35、ons The designer is free to use a nationally approved detailed calculation method for pipe sizing (see Annex C). 5.3 Hot water return pipes As hot water return pipes have to fulfil other hydraulic requirements, they cannot be sized with this method. The flow-velocity in the hot water return pipes sh
36、all be calculated according to national or manufacturers recommendation. 5.4 Loading unit 1 loading unit (LU) is equivalent to a draw-off flow rate QAof 0,1 l/s. Table 2 Draw-off flow-rates QA, minimum flow-rates at draw-off points Qminand loading units for draw-off points QAQminDraw-off point l/s l
37、/s Loading units Washbasin, handbasin, bidet, WC-cistern 0,1 0,1 1 Domestic kitchen sink, -washing machine a, dish washing machine, sink, shower head 0,2 0,15 2 Urinal flush valve 0,3 0,15 3 Bath domestic 0,4 0,3 4 Taps /garden/garage) 0,5 0,4 5 Non domestic kitchen sink DN 20, bath non domestic 0,8
38、 0,8 8 Flush valve DN 20 1,5 1,0 15 aFor non domestic appliances check with manufacturer. EN 806-3:2006 (E) 7 The values in this Table do not correspond with the values in product norms. They are only used for pipe sizing. 5.5 Application of the simplified method Beginning at the last draw-off point
39、, the loading units for each section of the installation have to be determined. The loading units must be added. The probability of simultaneous demand has been taken into consideration in Tables 3.1 to 3.8. Depending on the material chosen by the designer the pipe size can now be taken out of Table
40、s 3.1 to 3.8. The design flow-rate QD as given in Figure B.1 is taken into account for the values in Tables 3.1 to 3.8. Table 3 Loading units for determination of pipe diameters Table 3.1 Hot-dip galvanised steel Max. load LU 6 16 40 160 300 600 1 600 Highest value LU 4 15 DN 15 20 25 32 40 50 65 di
41、mm 16 21,6 27,2 35,9 41,8 53 68,8 Max length of pipe m 10 6 Table 3.2 Copper Max. load LU 1 2 3 3 4 6 10 20 50 165 430 1 050 2 100 Highest value LU 2 4 5 8 dax s mm 12 x 1,0 15 x 1,0 18 x 1,0 22 x 1,0 28 x 1,5 35 x 1,5 42 x 1,5 54 x 2 76,1 x 2 dimm 10,0 13,0 16,0 20,0 25 32 39 50 72,1 Max length of
42、pipe m 20 7 5 15 9 7 Table 3.3 Stainless steel Max. load LU 3 4 6 10 20 50 165 430 1 050 2 100 Highest value LU 4 5 8 dax s mm 15 x 1,0 18 x 1,0 22 x 1,0 28 x 1,2 35 x 1,5 42 x 1,5 54 x 1,5 76,1 x 2 dimm 13,0 16,0 19,6 25,6 32 39 51 72,1 Max length of pipe m 15 9 7 Table 3.4 PE-X Max. load LU 1 2 3
43、4 5 8 16 35 100 350 700 Highest value LU 4 5 8 dax s mm 12 x 1,7 16 x 2,2 20 x 2,8 25 x 3,5 32 x 4,4 40 x 5,5 50 x 6,9 63 x 8,6 dimm 8,4 11,6 14,4 18,0 23,2 29 36,2 45,6 Max length of pipe m 13 4 9 5 4 EN 806-3:2006 (E) 8 Table 3 (concluded) Table 3.5 PB Max. load LU 1 2 3 3 4 6 13 25 55 180 500 1 1
44、00 Highest value LU 2 4 5 8 dax s mm 12 x 1,3 16 x 1,5 20 x 1,9 25 x 2,3 32 x 3 40 x 3,7 50 x 4,6 63 x 5,8 dimm 9,4 13,0 16,2 20,4 26 32,6 40,8 51,4 Max length of pipe m 20 7 5 15 9 7 Table 3.6 PP Max. load LU 1 2 3 3 4 6 13 30 70 200 540 970 Highest value LU 2 4 5 8 dax s mm 16 x 2,7 20 x 3,4 25 x
45、4,2 32 x 5,4 40 x 6,7 50 x 8,4 63 x 10,5 75 x 12,5 dimm 10,6 13,2 16,6 21,2 26,6 33,2 42 50 Max length of pipe m 20 12 8 15 9 7 Table 3.7 PVC-C Max. load LU 3 4 5 10 20 45 160 420 900 Highest value LU 4 5 8 dax s mm 16 x 2,0 20 x 2,3 25 x 2,8 32 x 3,6 40 x 4,5 50 x 5,6 63 x 6,9 dimm 12,0 15,4 19,4 2
46、4,8 31 38,8 49,2 Max length of pipe m 10 6 5 Table 3.8 PEX/AL/PE-HD resp. PE-MD/AL/PE-HD Max. load LU 3 4 5 6 10 20 55 180 540 1 300 Highest value LU 4 5 5 8 dax s mm 16 x 2,25/16 x 2,0 18 x 2 20 x 2,5 26 x 3 32 x 3 40 x 3,5 50 x 4 63 x 4,5 dimm 11,5/12,0 14 15 20 26 33 42 54 Max length of pipe m 9
47、5 4 For materials not mentioned in the tables, the table with the most similar material and in this table the column with the most similar or equal diameter shall be chosen. 6 Special-installations Special-installations are installations, which do not fulfil the conditions for standard-installations
48、 or if the building has measurements, which highly exceed the average. There are installations, where only parts of the project shall be called special-installations. In these cases the parts which fulfil the conditions for standard-installations can be sized with the simplified method. Pipes for sp
49、ecial-installations shall be sized by nationally approved detailed calculations (see Annex C). EN 806-3:2006 (E) 9 Annex A (informative) Example for the determination of pipe sizes for standard-installations Figure A.1 Example for standard-installation EN 806-3:2006 (E) 10 Appliance Beginning at the end of the pipe the loading units must be added. Resulting from this calculation the size of that part of the pipe can be determined. Task according to the drawing The
