bs en 806-3:2006
TRANSCRIPT
-
8/11/2019 BS EN 806-3:2006
1/18
BRITISH STANDARD BS EN806-3:2006
Specifications forinstallations inside
buildings conveying
water for human
consumption
Part 3: Pipe sizing Simplified method
The European Standard EN 806-3:2006 has the status of aBritish Standard
ICS 91.140.60
-
8/11/2019 BS EN 806-3:2006
2/18
-
8/11/2019 BS EN 806-3:2006
3/18
-
8/11/2019 BS EN 806-3:2006
4/18
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
-
8/11/2019 BS EN 806-3:2006
5/18
EN 806-3:2006 (E)
3
Foreword
This European Standard (EN 806-3:2006) has been prepared by Technical Committee CEN/TC 164 Watersupply, 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of an identical text orby endorsement, at the latest by October 2006, and conflicting national standards shall be withdrawn at the latestby October 2006.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 followingcountries 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 UnitedKingdom.
-
8/11/2019 BS EN 806-3:2006
6/18
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 waterstandard-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 anyamendments) 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 inEuropean standards.
Table 1 Terms and definitions
Term Symbol Unit Explanation (definition)
Flow-velocity v m/s
Flow-rate, volume flow Q l/sm3/h
Ratio of the volume of water passing through a specified flowcross-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 theappliance to function
Draw-off flow-rate QA l/s Assumed draw-off flow-rate at appliance for calculationpurposes
Total flow-rate QT l/s QA, sum of all draw-off flow-rates of the water appliancessupplied
Design flow-rate QD l/s Flow-rate for hydraulic calculations, taking into considerationthe probable simultaneous demand
Static pressure pR Pa Gauge pressure at a measuring point in the water supplysystem when no water flowing
Flow pressure pFl Pa Gauge pressure at a measuring point in the water supplysystem when water flowing
Minimum flow pressure pminFl Pa Gauge pressure required at the connection to a draw-off pointat its draw-off flow-rate
Pressure difference, head loss p Pa Difference in pressure between two points in the drinking waterinstallation, resulting from wall friction and individual head loss
(To be continued)
-
8/11/2019 BS EN 806-3:2006
7/18
EN 806-3:2006 (E)
5
Table 1 (concluded)
Term Symbol Unit Explanation (definition)
Head loss as a consequence of differencein 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 anappliance, the length of time the appliance is in use and thefrequency of use. One loading unit (1 LU) equalises a draw-offflow 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 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 than15 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 considerthis 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), givethe possible head of difference in elevation within a pressure section.
-
8/11/2019 BS EN 806-3:2006
8/18
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, 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 standard-installations. This method can be used for alltype 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 calculations
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. Theflow-velocity in the hot water return pipes shall 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
QA QminDraw-off point
l/s l/s
Loading units
Washbasin, handbasin,bidet, WC-cistern
0,1 0,1 1
Domestic kitchen sink, -washing machine a, dishwashing 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 sinkDN 20, bath non domestic
0,8 0,8 8
Flush valve DN 20 1,5 1,0 15
a For non domestic appliances check with manufacturer.
-
8/11/2019 BS EN 806-3:2006
9/18
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, the loading units for each section of the installation have to be determined. Theloading units must be added. The probability of simultaneous demand has been taken into consideration in Tables3.1 to 3.8. Depending on the material chosen by the designer the pipe size can now be taken out of Tables 3.1 to3.8. 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 mm 16 21,6 27,2 35,9 41,8 53 68,8
Max length ofpipe
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 12x 1,0 15x 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
di mm 10,0 13,0 16,0 20,0 25 32 39 50 72,1
Max length of
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 15x 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
di mm 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 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
di mm 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
-
8/11/2019 BS EN 806-3:2006
10/18
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 1 100
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
di mm 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 4,2 32 x 5,4 40 x 6,7 50 x 8,4 63 x 10,5 75 x 12,5
di mm 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
di mm 12,0 15,4 19,4 24,8 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
di mm 11,5/12,0 14 15 20 26 33 42 54
Max length of pipe m 9 5 4
For materials not mentioned in the tables, the table with the most similar material and in this table the column withthe most similar or equal diameter shall be chosen.
6 Special-installations
Special-installations are installations, which do not fulfil the conditions for standard-installations or if the buildinghas measurements, which highly exceed the average.
There are installations, where only parts of the project shall be called special-installations. In these cases the partswhich fulfil the conditions for standard-installations can be sized with the simplified method.
Pipes for special-installations shall be sized by nationally approved detailed calculations (see Annex C).
-
8/11/2019 BS EN 806-3:2006
11/18
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
-
8/11/2019 BS EN 806-3:2006
12/18
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 thatpart of the pipe can be determined.
Task according to the drawing
The cold water pipe from the under ground floor to the draw-off points has to be sized.
The pipe shall be in hot-dip galvanised steel.
In every apartment the following draw-off points will be installed:
1 domestic bath
1 WC-cistern
1 washbasin
1 domestic kitchen sink
There are five equal apartments.
Result
Find the loading units from Table 2:
1 domestic bath 4 LU
1 WC-cistern 1 LU
1 washbasin 1 LU
1 domestic kitchen sink 2 LU
Part 1
connected is 1 domestic kitchen sink = 2 LU
Table 3.1 demands for 2 LU = DN 15
Part 2
connected are 1 domestic kitchen sink = 2 LU
1 domestic bath = 4 LU
total = 6 LU
Table 3.1 demands for 6 LU = DN 15
Part 3
connected are 1 domestic kitchen sink = 2 LU
1 domestic bath = 4 LU
1 washbasin = 1 LU
total = 7 LU
-
8/11/2019 BS EN 806-3:2006
13/18
EN 806-3:2006 (E)
11
Table 3.1 demands for 7 LU = DN 20
Part 4
connected are 1 domestic kitchen sink = 2 LU
1 domestic bath = 4 LU
1 washbasin = 1 LU
1 WC-cistern = 1 LU
total per apartment = 8 LU
Table 3.1 demands for 8 LU = DN 20
Part 5
connected are 2 apartments = 16 LU
Table 3.1 demands for 16 LU = DN 20
Part 6
connected are 3 apartments = 24 LU
Table 3.1 demands for 24 LU = DN 25
Part 7
connected are 4 apartments = 32 LU
Table 3.1 demands for 32 LU = DN 25
Part 8
connected are 5 apartments = 40 LU
Table 3.1 demands for 40 LU = DN 25
-
8/11/2019 BS EN 806-3:2006
14/18
EN 806-3:2006 (E)
12
Annex B(informative)
Design flow rates in relation to total flow rates
The diagram (Figure B.1) shows a possibility to determine the design flow-rate QD from LU for standard-installations. Where nationally approved further such diagrams (e.g. for various types of buildings) may be used.
-
8/11/2019 BS EN 806-3:2006
15/18
-
8/11/2019 BS EN 806-3:2006
16/18
EN 806-3:2006 (E)
14
Annex C(informative)
List of national pipe sizing methods
The following survey gives information about existing national calculation methods which can be used as analternative to this European Standard or in cases where reasons for differentiated pipe sizing are given e.g. for bigbuildings, industrial and commercial plants etc. If any other national calculation methods exist, which are not listedhere, it is recommended that the national standardization body should give information in the foreword of thenational edition of EN 806-3.
Table C.1 National pipe sizing methods
Country Document No Title
Austria NORM B 2531-2 Trinkwasserversorgungseinrichtungen inGrundstcken; Bemessung der Rohrleitungen
Denmark DS 439 Code of Practice for domestic water supply installations
Finland National Building Code ofFinland, D1
Water supply and drainage installations for buildings Regulations and recommendations 1987
France NF P40-202(ref DTU 60.11)
Rgles de calcul des installations de plomberie sanitaire et desinstallations d'vacuation des eaux pluviales
Germany DIN 1988-3 Technische Regeln fr Trinkwasser-Installationen (TRWI);Ermittlung der Rohrdurchmesser; Technische Regel des DVGW
The Netherlands VEWIN Working SheetsWB 2.1WB 2.1 A
WB 2.1 CWB 2.1 G
Principles of calculation: General and overviewPrinciples of calculation: Flow rate and working pressures fortapware and apparatusPrinciples of calculation: Calculation and design criteriaPrinciples of calculation and tables for determining pressurelosses in pipes
Spain Cdigo Tcnico de laEdificatin, Seccin HS4
PNE 149201
Suministro de aguaAbastecimiento de agua. Dimensionamiento de instalaciones
interiores de agua
United Kingdom BS 6700:1997 Specification for design, installation, testing and maintenance ofservices supplying water for domestic use within buildings andtheir curtilages
-
8/11/2019 BS EN 806-3:2006
17/18
blank
-
8/11/2019 BS EN 806-3:2006
18/18
BS EN806-3:2006
BSI
389 Chiswick High Road
London
W4 4AL
BSI British Standards Institution
BSI is the independent national body responsible for preparingBritish Standards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.
Revisions
British Standards are updated by amendment or revision. Users ofBritish Standards should make sure that they possess the latest amendments oreditions.
It is the constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform the Secretary of the technical committeeresponsible, the identity of which can be found on the inside front cover.Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.
BSI offers members an individual updating service called PLUS which ensuresthat subscribers automatically receive the latest editions of standards.
Buying standards
Orders for all BSI, international and foreign standards publications should beaddressed to Customer Services. Tel: +44 (0)20 8996 9001.Fax: +44 (0)20 8996 7001. Email: [email protected]. Standards are alsoavailable from the BSI website at http://www.bsi-global.com.
In response to orders for international standards, it is BSI policy to supply theBSI implementation of those that have been published as British Standards,unless otherwise requested.
Information on standards
BSI provides a wide range of information on national, European andinternational standards through its Library and its Technical Help to ExportersService. Various BSI electronic information services are also available which give
details on all its products and services. Contact the Information Centre.Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: [email protected].
Subscribing members of BSI are kept up to date with standards developmentsand receive substantial discounts on the purchase price of standards. For detailsof these and other benefits contact Membership Administration.Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001.Email: [email protected].
Information regarding online access to British Standards via British StandardsOnline can be found at http://www.bsi-global.com/bsonline.
Further information about BSI is available on the BSI website athttp://www.bsi-global.com.
Copyright
Copyright subsists in all BSI publications. BSI also holds the copyright, in theUK, of the publications of the international standardization bodies. Except aspermitted under the Copyright, Designs and Patents Act 1988 no extract may bereproduced, stored in a retrieval system or transmitted in any form or by anymeans electronic, photocopying, recording or otherwise without prior writtenpermission from BSI.
This does not preclude the free use, in the course of implementing the standard,of necessary details such as symbols, and size, type or grade designations. If thesedetails are to be used for any other purpose than implementation then the priorwritten permission of BSI must be obtained.
Details and advice can be obtained from the Copyright & Licensing Manager.Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553.Email: [email protected].