1、STD.BSI BS EN 12056-2-ENCL 2000 I 1624669 0873902 303 I BRITISH STANDARD BS EN 12056-2:2000 Gravity drainage systems inside buildings - Part 2: Sanitary pipework, layout and calculation The European Standard EN 1205 91.140.80 I NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW S
2、TD-BSI BS EN 32056-2-ENGL ZOO0 E lbZ4bb9 0873903 24T M BS EN 12056-2:2000 been prepared under the direction of the Sector AmdNo. Date Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 September 2000 Q BSI 09-2000 Na
3、tional foreword Comments This British Standasd is the official Engiish language version of EN 1205622000. It supersedes BS 55721994 which is withdrawn. The UK participation in its preparation was entrusted by Technicai Committee B/505, Wastewater engineering, to Subcommittee B/505/21, Roof drainage
4、and sanitary pipework, which has the responsibility to: - aid enquirem to understand the te% - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK inkrests
5、 informed; them in the UK. The national mexes are an informative element of this British Standard and contain information provided for easier implementation of EN 1205fk2:2000 in the United Kingdom, within the framework envisaged by the scope of the European Stan Part 2: Sanitary pipework, layout an
6、d calculation; Part 3: Roof drainage, layout and calculation; Part 4: Waste water lifting plants, layout and calculation; Part 5: Installation and testing of drainage systems, instructions for operation, maintenance and use. According to the CENKENELEC Internal Regulations, the national standards or
7、ganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 09-2000 STD-
8、BSI BS EN 12056-2-ENGL 2000 I 3624bb 0873909 768 Page 6 EN 12056-2:2000 i 3 3.1 3.1.1 Scope This European Standard applies to waste water drainage systems which operate under gravity. It is applicable for drainage systems inside dwellings, commercial, institutional and industrial buildings. Differen
9、ces in plumbing within Europe have led to a variety of systems being developed. Some of the major systems in use are described but this standard has not attempted to detail the intricacies of each system. Detailed information additional to that contained in this standard may be obtained by referring
10、 to the technical documents listed in annex A. This second part of the standard sets out principles which shall be followed for both layout and calculation. It makes limited provision for drainage systems conveying trade effluent and also makes limited provision for fluids removed by pumps. All draw
11、ings in the standard are given as examples and are not intended to exclude any other system configuration. Norm ative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in th
12、e 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 publication referred to appli
13、es. EN 12056-1 : Gravity drainage systems inside buildings - Part 1 : General and performance requirements. EN 12056-3: Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculation. EN 120564: Gravity drainage systems inside buildings - Part 4: Waste water lifting plants
14、, layout and calculation. EN 12056-5 Gravity drainage systems inside buildings - Part 5: Installation and testing, instructions for operation, maintenance and use. EN 752 Drain and sewer systems outside buildings. prEN 12380 Ventilating pipework - Air admittance valve systems (AVS). Definitions For
15、the purpose of this European Standard, the following definitions apply. General waste water water which is contaminated by use and all water discharging into the drainage system, e.g. domestic and trade effluent, condensate water and also rainwater when discharged in a waste water drainage system Q
16、BSI 09-2000 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.2 3.2.1 1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.2.7 3.2.8 3.2.9 Page 7 EN 12056-2:2000 domestic waste water water which is contaminated by use and normally discharged from WC, shower, bath, bidet, wash basin, sink, floor gully trade effl
17、uent water after industrial use and processes contaminated/polluted water including cooling water grey water waste water not containing faecal matter or urine black water waste water containing faecal matter or urine rainwater water resulting from natural precipitation that has not been deliberately
18、 contaminated flood level the maximum level to which waste water can rise within a drainage system drainage system a system composed of drainage equipment, and other components collecting waste water and discharging by means of gravity; effluent lifting plant may be part of a gravity drainage system
19、 combined system a drainage system for both rain and waste water in a single pipe separate system a drainage system for draining rain and waste water separately by dedicated pipework Pipes and fittings sanitary pipework arrangement of discharge pipework, with or without ventilating pipes, connected
20、to a drainage system NOTE For the purposes of this standard, “pipework“ include pipes and fittings. nominal diameter (DN) numerical designation of size which is a convenient round number approximately equal to the diameter in mm internal diameter (di) mean internal diameter of the pipe barrel at any
21、 cross-section external diameter (da) mean external diameter of the pipe barrel at any cross-section minimum internal diameter (dl ,in) smallest internal diameter allowed with maximum tolerance branch discharge pipe pipe connecting sanitary appliances to a discharge stack or drain square entry equal
22、 branch junction that is more than 45“, or has a centre line radius less than the internal pipe diameter swept entry equal branch junction that is at 45“ or less, or has a centre line radius not less than the internal pipe diameter connection bend first fitting in direction of flow after trap outlet
23、 3.2.10 discharge stack main (generally vertical) pipe, conveying discharges from sanitary appliances Q BSI 09-2000 STD.BSI BS EN 12056-2-ENGL 2000 E 1624bb 0873911i 31b Page 8 EN 12056-2:2000 3.2.1 I 3.2.12 3.2.13 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.4 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 stack offset non-
24、vertical part of a discharge stack drain near horizontal pipe suspended within a building or buried in the ground to which stacks or ground floor appliances are connected filling degree proportion of water depth (h) to the inside diameter (di) Ventilating pipework ventilating pipe pipe provided to l
25、imit the pressure fluctuations within the discharge pipe system branch ventilating pipe ventilating pipe connected to a branch discharge pipe stack vent extension of a vertical discharge pipe above the highest branch discharge pipe connection that terminates in an end, open to the atmosphere ventila
26、ting stack Main vertical ventilating pipe, connected to a discharge stack, to limit pressure fluctuations within the discharge stack air admittance valve valve that allows air to enter the system but not to escape in order to limit pressure fluctuations within the sanitary pipework Appliances domest
27、ic sanitary appliances fixed appliances supplied with water and used cleaning or washing. For example: baths, showers, wash basins, bidets, WCs, urinals, sinks, dishwashers, washing machines non-domestic sanitary appliances special sanitary appliances used in commercial kitchens, laundries, laborato
28、ries, hospitals, hotels, swimming-pools, etc. floor gully discharge fitting intended to receive water from floors either through apertures in a grating or from pipes connected to the body of the gully. A gully may include a trap trap device that prevents the passage of foul air by means of water sea
29、l depth of water seal (H) the depth of water which would have to be removed from a fully charged trap before gases and odours at atmospheric pressure could pass through the trap shown as H in Figure 1. 8 BSI 09-2000 STD.BSI BS EN L205b-2-ENGL 2000 H 1624669 0873912 252 111 Page 9 EN 12056-2:2000 3.5
30、 3.5.1 3.5.2 3.5.3 3.5.4 I 3.5.5 3.5.6 3.5.7 3.5.8 Figure 1 -Water depth in trap Calculation discharge unit (DU) the average discharge rate of a sanitary appliance expressed in litres per second (Ils) frequency factor (K) variable to take into account the frequency of use of sanitary appliances (dim
31、ensionless) waste water flow rate (Q,) total design flow rate from sanitary appliances in a drainage system or in a part of a drainage system in litres per second (Ils) continuous flow rate (Qc) flow rate of all continuous flows, e.g. cooling water, etc., in litres per second (Ils) pumped water flow
32、 rate (Q,) discharge rate of waste water pumps in litres per second (Ils) total flow rate (Qtot) the total flow rate is the sum of the waste water flow rate (Q,.,) and continuous flow rate (Q,) and pumped water flow rate (Q,), in litres per second (Vs) hydraulic capacity (Q,=) maximum flow rate of w
33、ater permitted in a branch, stack or drain in litres per second (Ils) air flow rate (Qa) minimum flow rate of air through a ventilating pipe or air admittance valve, measured at 250 Pascal (Pa) pressure drop, in litres per second (Ils) 4 System configurations 4.1 Genera I There are many types of was
34、te water drainage systems in use today. These have developed as a result of differences in the type and use of sanitary appliances in different countries and also different, justifiable technical traditions. O BSI 09-2000 STD-BSI BS EN L205b-Z-ENGL 2000 M lb24669 0873933 199 Page 10 EN 12056-212000
35、4.2 System types The systems may be divided into four system types, although there are variations in detail within each system type hence the need to refer to the national and local regulations and practice listed in annex A (informative). System I System II System 111 System IV Single discharge sta
36、ck system with partly filled branch discharge pipes Sanitary appliances are connected to partly filled branch discharge pipes. The partly filled branch discharge pipes are designed with a filling degree of 0.5 (50 %) and are connected to a single discharge stack. Single discharge stack system with s
37、mall bore discharge branch pipes Sanitary appliances are connected to small bore branch discharge pipes. The small bore branch discharge pipes are designed with a filling degree of 0.7 (70 %) and are connected to a single discharge stack. Single discharge stack system with full bore branch discharge
38、 pipes Sanitary appliances are connected to full bore branch discharge pipes. The full bore branch discharge pipes are designed with a filling degree of 1 .O (1 O0 %) and each branch discharge pipe is separately connected to a single discharge stack. Separate discharge stack system Drainage systems
39、type I, II and III may also be divided into a black water stack serving WCs and urinals and a grey water stack serving all other appliances. 4.3 Configurations Each system may be configured in a number of ways, governed by the need to control pressure in the pipework in order to prevent foul air fro
40、m the waste water system entering the building. The principal configurations are described below but combinations and variations are often required. 4.3.1 Primary ventilated system configurations Control of pressure in the discharge stack is achieved by air flow in the discharge stack and the stack
41、vent (see Figure 2). Alternatively, air admittance valves may be used. O BSI 09-2000 Page Il EN 12056-212000 I 9-4 94 c9 8 Figure 2 - Primary ventilated system configurations Legend: 1 Bath 2 Wash basin 3 wc 4 Floor gully 5 Air admittance valve 6 Stack 7 Branch discharge pipe 8 Drain 9 Stackvent 4.3
42、.2 Secondary ventilated system configurations Control of pressure in the discharge stack is achieved by use of separate ventilating stacks and/or secondary branch ventilating pipes in connection with stack vents (see Figure 3). Alternatively, air admittance valves may be used. Q BSI 09-2000 STD=BSI
43、BS EN L2056-2-ENGL 2000 E 362Yhh9 0873735 ThJ Page 12 EN 12056-2:2000 6 6 8 8 8 Figure 3 - Secondary ventilated system configurations Legend: 1 2 3 4 5 6 7 8 9 10 11 12 Bath Wash basin wc Floor g u Iiy Air admittance valve Stack Branch discharge pipe Drain Stack vent Ventilating stack Branch ventila
44、ting pipe Urinal 4.3.3 Unventilated discharge branch configurations Control of pressure in the discharge branch is achieved by air flow in the discharge branch (see Figure 4). Q BSI 09-2000 STD.BS1 ES EN L205b-2-ENGL 2000 II Lb24hb 087391b 9TB e Page 13 EN 12056-2:2000 I I k9 Figure 4 - Unventilated
45、 discharge branch configuration Legend: 1 Bath 2 Wash basin 3 wc 4 Floor gully 6 Stack 7 Branch discharge pipe 9 Stackvent 4.3.4 Ventilated discharge branch configurations Control of pressure in the discharge branch is achieved by ventilation of the discharge branch (see Figure 5). Alternatively, ai
46、r admittance valves may be used. Q BSI 09-2000 STD-BSI BS EN 1205b-Z-ENGL 2000 111 Lb24bb9 0873917 834 W I 104 Page 14 EN 12056-2:2000 I -6 1 I I I 7 -11- I T Q9 I I I I 7 -7 -L I I 1.J 1 I I Figure 5 - Ventilated discharge branch configurations Legend: 1 Bath 2 3 5 6 7 9 10 11 Wash basin wc Air adm
47、ittance valve Stack Branch discharge pipe Stack vent Ventilating stack Branch ventilating pipe 5 5.1 5.2 5.3 5.4 Layout rules Compliance with European Standards Appliances, pipes and fmings shall comply with relevant European Standards where applicable. European Standards of commonly used products a
48、re listed in annex D. Protection against flooding Drainage shall be provided for all water supply points inside a building. Odour Appliances connected to the drainage system shall be installed with a trap to prevent escape of foul air into the building. Trap seal The depth of water seal (H) shall be
49、 not less than 50 mm. Q BSI 09-2000 5.5 5.6 5.7 6 6.1 6.2 6.2.1 6.2.2 30 40 Q BSI 09-2000 26 34 STD-BSI BS EN 1205b-2-ENGL 2000 II 1b24bb9 0873918 770 = 80 90 I O0 125 150 200 Page 15 EN 12056-212000 75 79 96 113 146 I 84 Reduction of nominal diameter The nominal diameter (DN) of discharge pipes shall not be reduced in the direction of flow. Ven ti lati on Sanitary pipework is often used to ventilate the external drain or sewer system. Therefore care should be taken to ensure that open vents are installed as necessary. Air admittance valves Where air admittance valve
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