1、STD.BSI BS EN 1205b-4-ENGL 2000 BRITISH STANDARD 1624669 0874200 051 Gravity drainage systems inside buildings - Part 4 Wastewater lifting plants - Layout and calculation “he European Standard EN 1205642000 has the status of a Britishstandard ICs 91.140.80 3s EN 12056-4:2000 NO COPYING WITBOUT BSI P
2、ERMISSION EXCEPT AS PEBMIITED BY COPYBIGJ3T LAW STD-BSI BS EN L2056-4-ENGL 2000 M Lb24669 0874203 T98 BS EN 1205642000 been prepared under the direction of the Sedor AmdNo. Committee for Building and Cid Engineering, was published under the authority of the Standards Committee and comes into effect
3、on 16 September 2000 Q BSI 09-2000 ISBN O 580 36442 9 National foreword Date Comments This British Standard is the official Engish ianguage version of EN 1205642000. The UK participation in its preparation was entrusted by Technical Committee WN5, Wastewater engineering, to Subcommittee BN5/21, Roof
4、 drainage and sanitary pipework, which has the responsibility to: - aid enquirers to understand the te* - present to the responsible European committee any enquiries on the - monitor related intedonal and European developments and promulgate interpretation, or proposals for change, and keep the UK i
5、nterests informed; them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Stan- which implement international or European publications referred to in this document may be found in the BSI Sandards Catalogue u
6、nder the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contsact. Users of British Standards are responsible for their correct
7、 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates
8、when the document was last issued. STD-BSI BS EN L205b-Y-ENtL 2000 m Lb24bb9 0874202 924 m EUROPEAN STANDARD NORME EUROPEENNE EUROPISCHE NORM EN 12056-4 June 2000 ICs 91.140.80 English version Gravity drainage systems inside buildings - Part 4: Wastewater lifting plants - Layout and calculation Rsea
9、ux dvacuation gravitaire lintrieur des btiments - Partie 4: Stations de relevage deffluents - Conception et calculs Schwerkraftentwsserungsanlagen innerhalb von Gebuden - Teil 4: Abwasserhebeanlagen - Planung und Bemessung This European Standard was approved by CEN on 27 October 1999. CEN members ar
10、e bound to comply with the CENICENELEC 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
11、the Central Secretariat or to any CEN member. This European Standard exists in three offcial versions (English, French, German). A version in any other language made by tmslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same statu
12、s as tie official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMIITEE FOR STANDARD
13、IZATION COMIT EUROPEN DE NORMALISATION EUROPAISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart, 36 B-IO50 Brussels Q 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12056-4:2000 E STD.BSI BS EN 12056-4-ENGL 2000
14、1b2Vbb9 0874203 860 6 Page 2 EN 12056-4:2000 Contents Page Foreword . 3 1 Scope . 3 2 Normative references . 3 3 Definitions. symbols. units and designation . 4 3.1 Definitions 4 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 Wastewater lifting plant . 4 Backflow . 4 Flood level 4 Backflow loop 4 D
15、ischarge head, Hp . 4 Collection tank for wastewater containing faecal matter . 4 Useful volume . 4 Duty flow, VP 4 3.2 Symbols . 5 4 Protection against backflow 5 5 Installation . 7 5.1 General requirements 7 5.2 Pipework 7 5.3 Ventilation 10 5.4 Drains 10 5.5 Electrical connections 10 6 Selection
16、of wastewater lifting plants . 10 6.1 Determination of flow. VS Rainwater discharge - Qu (CR) T S Minimum running time V I Useful volume V m/S Flow velocity z - Resistance factor - the rooms are of minor importance, .e. no valuable items are present and the health of the inhabitants will not be - th
17、e number of users is small and a WC is available above flood level, and; affected in the case of flooding, and; - sanitary appliances do not need to be used during flooding. “highway“ refers to the road, pathways, roadside shoulders, etc. O BSI 09-2000 STD.BSI BS EN 12056-4-ENGL 2000 I 1624bb 087420
18、7 40b Page 6 EN 120564:2000 Figure 1 - Illustration of protection against backflow where the drain or sewer is higher than the sanitary appliances Figure 2 - Illustration of protection against backflow by means of a wastewater lifting plant where there is a fall to the drain or sewer Q BSI 09-2000 P
19、age 7 EN 12056-4:2000 Figure 3 - Illustration of protection of a room of minor importance against backflow by means of anti- flooding valve where there is a natural fall to the sewer 5 Installation 5.1 General requirements Wastewater lifting plants shall be installed so that rotation is prevented. W
20、astewater lifting plants that might be subject to flotation shall be fastened down. Rooms containing wastewater lifting plants shall be of sufficient size to give a working space of at least 600 mm around and above all operating parts or components that may need maintenance. Rooms shall be adequatel
21、y lit and well ventilated. Where a faecal wastewater lifting plant to prEN 12050-1 is used, a sump shall be provided. All pipework connections to a wastewater lifting plant shall be noise absorbing. Collection tanks for wastewater containing faecal matter shall not be structurally connected to the b
22、uilding. Where a faecal wastewater lifting plant is used within a building, it shall have a freestanding collection tank. In accordance with prEN 12050-1, duplicate pumping devices shall be installed in plants where the wastewater inflow cannot be interrupted. Surface water drainage of areas below f
23、lood level shall be kept separate from domestic wastewater and pumped away using a wastewater lifting plant installed outside the building. 5.2 Pipework Sanitary pipework below flood level and draining to a wastewater lifting plant shall be designed and installed in accordance with EN 12056. All pip
24、ework shall be installed so that it is self-draining and shall not be restricted or reduced in diameter in the direction of flow. The minimum size of discharge pipework shall be in accordance with Table 2. O BCI 09-2000 Page 8 EN 12056-4:2000 Table 2 - Minimum size of discharge pipework Type of wast
25、ewater lifting plant Non-macerating faecal lifting plant to prEN 12050-1 Macerating faecal lifting plant to prEN 12050-1 Faecal-free lifting plant to prEN 12050-2 Non-macerating faecal lifting plant for limited applications to prEN 12050-3 Macerating faecal lifting plant for limited applications to
26、prEN 12050-3 Minimum size of discharge pipework DN 80 DN 32 DN 32 DN 25 DN 20 All pipework connected to a lifting plant shall be installed so that it is not under stress and shall be adequately supported. An isolating valve shall be installed on the inlet of the wastewater lifting plant and also on
27、the discharge side after the non-return valve. For wastewater lifting plants to prEN 12050-2 or prEN 12050-3 with discharge pipework less than DN 80, the isolating valves may be omitted provided that any non-return valve has a backwash device or some other means of emptying the discharge pipework in
28、to the collection tank is provided. Discharge pipework from a wastewater lifting plant shall be installed to form a backflow loop above flood level (see Figures 1 and 2). No other connections shall be made to the discharge pipework. Discharge pipework from a wastewater lifting plant shall always be
29、connected to a ventilated drain (see Figures 4 and 5) and never to a stack. Discharge pipeworks shall be connected to a drain in the same way as for a gravity connection. Cleaning access to the drain shall be provided. Discharge pipework shall be capable of withstanding 1,5-times the maximum operati
30、ng pressure of the lifting plant. Air admittance valves shall not be installed in the discharge pipework. Q BSI 09-2000 STD.BSI BS EN 12056-4-ENGL 2000 3b24bb 0874230 TTO Page 9 EN 12056-4:2000 1 Ventilating pipes 6 Drain 2 Discharge stack 3 Discharge pipework from faecal lifting plant 4 Ventilating
31、 pipe for faecal lifting plant 5 Drain 7 Flood level 8 Faecal lifting plant with non-return valve 9 Access point 1 O Backflow loop Figure 4 - Illustration of connection of a faecal lifting plant to a drain 1 Stackvent 5 Drain 2 Branch ventilating pipes 3 Branch ventilating pipes 4 Discharge pipework
32、 with backflow loop 6 Flood level 7 Lifting plant for faecal-free wastewater with non-return valve 8 Access point Figure 5 - Illustration of connection of a lifting plant for faecal-free wastewater to a drain Q BSI 09-2000 STD.BSI BS EN 32056-4-ENGL 2000 m 3624669 0874233 937 m Page 10 EN 12056-4:20
33、00 5.3 Ventilation Faecal lifting plants to prEN 12050-1 shall be ventilated to above roof level. Ventilating pipes may be connected to either a ventilating stack or a stack vent. Ventilating pipes shall not be connected to the inflow side of the ventilating pipework of a grease separator. 5.4 Drain
34、s Drains shall be sized in accordance with EN 12056-2 and EN 12056-3 and the following requirements: a) The capacity of surface water drains, 4, shall be greater than the sum of the pumped discharge, a, and the surface water flow calculated in accordance with EN 12056-3. b) If a number of wastewater
35、 lifting plants discharge into a single drain, the capaciiy of the drain shall be at least 100% of the largest pumped flow plus 0,4 x 4 of the sum of the others. 5.5 Electrical connections Electrical connections shall be carried out by a suitably qualified electrician in accordance with the electric
36、al regulations applying in the country of installation. Any non-waterproof electrical fittings, such as control boxes and alarm units, shall be installed in dry, well-ventilated areas located above flood level. Where a warning device is specified, this shall be installed so as to warn all premises s
37、erved by the wastewater lifting plant if a failure should occur. 6 Selection of wastewater lifting plants In order to select a wastewater lifting plant, the total inflow, q, and the total head, , need to be calculated. A wastewater lifting plant with a duty of 4 and Hp shall be selected with Qp grea
38、ter than 4 and Hp as close as possible to Hot. 6.1 Determination of flow, losses in valves and fittings, in metres; friction losses in the discharge pipework, in metres. Figure 6 shows the relationship between head and flow and illustrates their component parts. O BSI 09-2000 STD-BSI BS EN L205b-4-E
39、NGL 2000 3b24bb9 0874232 873 m t 21 1 Systemcurve 2 Pumpcurve 3 Duty point Page 11 EN 12056-4:2000 1) - i ) FIOW generally i/, 2) Discharge head H Figure 6 - Relationship between head and flow 6.2.1 Calculation procedure for head, g Y losses in valves and fittings, in metres; gravitational constant,
40、 in metres per second per second; velocity in valve or fitting, in metres per second. Resistance factors for valves and fittings, 5, are given in Table 3. Table 3 - Resistance factors for valves and fittings (3) Determination of head losses through valves and fittings is given in Table 4. Alternativ
41、ely, information supplied by the manufacturer may be used. Q BSI 09-2000 Page 13 EN 120564:2000 Table 4 - Head loss, li,*, and flow velocity, v, in valves and fittings Resistance factor 0,4 I 0,6 1 0, I 1,0 I 1,2 I 1,4 I 1,6 I 1,8 I 2,O I 2,5 I 3,O I 3,5 I 4,O m v mlS Head loss, 6.2.4 Friction losse
42、s in discharge pipework, li,R Friction losses, H,R , are determined in accordance with Figure 9, annex A or using manufacturers information for all straight pipes in the discharge pipework up to the backflow loop, .e.: H,R i head loss as function of pipe length, dimensionless; length of straight pip
43、es, in metres. Alternatively, i T QP minimum running time , in seconds, from Table 5; pump flow, in litres per second. The lifting plant manufacturer may specify other values for the minimum runing time T. The useful volume shall be greater than the volume in the discharge pipework between the non-r
44、eturn valve and the backflow loop. In order to ensure that the contents of the discharge pipework are turned over during each pumping sequence, the minimum useful volume shall be 20 I. Q BSI 09-2000 Page 15 EN 12056-4:2000 360 300 200 100 90 80 70 60 50 40 36 30 t 20 al 10 9 8 7 6 5 4 3,6 3 2 1 100
45、90 80 70 60 50 40 30 20 10 9 8 7 t6 bl 5 4 3 2 1 03 0,8 0.6 0,4 444l O,? 1 a) rate of flow Qin m3/h b) rate of flow Qin s c) head loss H,i without dimension Figure 9 - Dimensionless head loss M,J in relationship to the internal diameter of the pipe, d, flow velocity, v, and rate of flow Q3 Annex A c
46、ontains a numerical depiction of the diagram Q BSI 09-2000 STD.BSI BS EN 1205b-4-ENGL 2000 m 1624669 0874217 355 m Page 16 EN 12056-4:2000 7 Commissioning The plant shall be commissioned by a suitably qualified person. The supplier of the wastewater lifting plant is responsible for ensuring the avai
47、lability of this person. Testing with water for a minimum of two switching sequences is required for commissioning. During the test, dry running shall be avoided. The following items shall be checked before, during and after testing: a) electrical safety in accordance with IEC or local regulations;
48、b) direction of rotation of the motor; c) valves (operation, opening, sealing); d) switching and setting of the control levels in the collection tank, where not preset by the manufacturer; e) watertightness of plant, valves and pipes; 9 rated voltage and frequency; g) functional test of the non-retu
49、rn valve; h) warning device; in combination with a second switching circuit where applicable; i) discharge pipework support; j) motor protection switch (by removing individual fuses (two-phase running); k) oil level (if oil chamber fitted); I) control lights, gauges and meters; m) operation of hand pump, where fitted. Commissioning shall be recorded in writing, including important data such as the setting of the motor overload switch and the readings from hours-run meters. 8 Inspection and maintenance 8.1 Inspection Wastewater lifting plan
