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1、BRITISH STANDARD BS 5572:1994 Code of practice for Sanitary pipework UDC 696.14:696.12.621.643.2 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 This British Standard, having been prepared under the direction of Technical Commit
2、teee B/505, was published under the authority of the Standards Board and comes into effect on 15 September 1994 BSI 03-1999 First published, as CP 304, December 1953 Second edition, as CP 304, March 1968 Third edition, as BS 5572, June 1978 Fourth edition September 1994 The following BSI references
3、relate to the work on this standard: Committee reference B/505/21 Draft for comment 92/10708 DC ISBN 0 580 22927 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/505, Wastewater Engineering, to Subcommittee B/505/21, R
4、oof drainage and sanitary pipework, upon which the following bodies were represented: Association of Building Component Manufacturers Brewers Society British Bathroom Council British Plaster Federation British Plumbing Fittings Manufacturers Association British Pump Manufacturers Association Clay Pi
5、pe Development Association Consumer Policy Committee of BSI Department of the Environment (Building Research Establishment) Department of the Environment (Construction Directorate) Department of the Environment (TBV Consult) Institute of Building Control Institute of Clerks of Works of Great Britain
6、 Institute of Plumbing Institution of Water and Environmental Management METCOM National Association of Plumbing, Heating and Mechanical Services Royal Institute of British Architects Scottish Office (Building Directorate) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheff
7、ieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 BSI 03-1999i Contents Page Committees responsibleInside front cover Forewordiv 1Scope1 2References1 3Definitions1 4Exchange of information2 4.1General2 4.2Statutory requirements2 5Performance4 5.1Gene
8、ral4 5.2Discharge4 5.3Hydraulics and pneumatics of discharge systems7 6Design10 6.1General10 6.2Traps10 6.3Discharge pipes and stacks16 6.4Ventilating pipes and stacks26 6.5Access30 6.6Materials30 6.7Special design considerations31 7Commonly used pipework arrangements; layout and sizing data32 7.1Ge
9、neral32 7.2Commonly used arrangements of branch discharge pipes32 7.3Discharge stack, branch and ventilating pipe relationships for common arrangements of appliances49 8Pipe sizing using discharge unit method59 8.1General59 8.2Procedure61 9Work on site61 9.1Jointing of pipes61 9.2Support and fixing
10、of pipes62 9.3Protection during building construction64 10Inspection and testing of completed installations64 10.1General64 10.2Final inspection64 10.3Testing64 11Maintenance66 11.1General66 11.2Cleaning and descaling67 11.3Periodic inspection68 Annex A (normative) Publications specifying materials,
11、 components and appliances70 Annex B (informative) Examples of pipe sizing procedures72 Annex C (informative) Bibliography74 Figure 1 Seal loss due to flow in branch pipes8 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 ii BSI
12、03-1999 Page Figure 2 Pressure effects and seal losses due to water flow in a discharge stack9 Figure 3 Ventilated system11 Figure 4 Ventilated stack system12 Figure 5 Single stack system13 Figure 6 Modified single stack system14 Figure 7 Trap types15 Figure 8 Branch discharge pipe connections to di
13、scharge stacks18 Figure 9 Prevention of cross flow20 Figure 10 Discharge from stub stack23 Figure 11 Offsets in discharge stacks24 Figure 12 Termination of stack vents and ventilating stacks25 Figure 13 Ventilating pipes to branches27 Figure 14 Ventilating stacks28 Figure 15 Access for cleaning and
14、testing purposes29 Figure 16 Branch discharge pipes for single WCs33 Figure 17 Branch discharge pipes for single urinals33 Figure 18 Branch discharge pipes for single wash basins34 Figure 19 Branch discharge pipes for single baths and sinks38 Figure 20 Combined branch discharge pipe arrangement for
15、a bath and wash basin39 Figure 21 Branch discharge pipes for washing and dish washing machines40 Figure 22 Branch discharge pipes for ranges of WCs42 Figure 23 Branch discharge pipes for ranges of urinals44 Figure 24 Branch discharge pipes for ranges of wash basins46 Figure 25 Branch discharge pipes
16、 for ranges of spray tap basins (without plugs)48 Figure 26 Common arrangements of discharge stacks and branches50 Figure 27 Design flows for stacks serving mixed types of appliances with and without WCs62 Table 1 Equivalence between size as defined in this standard and as in other publications3 Tab
17、le 2 Flow and usage data of some sanitary appliances5 Table 3 Trap seal loss data7 Table 4 Minimum sizes of tubular traps15 Table 5 Ventilating stack sizes (in millimetres) for commonly used arrangements of discharge stacks and swept entry branches58 Table 6 Discharge unit values and flow rates for
18、common appliances60 Table 7 Maximum capacity and number of discharge units for vertical stacks61 Table 8 Maximum number of discharge units allowed on branch discharge pipes61 Table 9 General guide for the sizes of ventilating pipes and stacks61 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01
19、14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 BSI 3-1999iii Page Table 10 Maximum distance between pipe supports63 Table 11 Number of sanitary appliances to be discharged for performance testing66 Table 12 The chemical cleaning of discharge stacks and branches69 List of references
20、Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 iv BSI 03-1999 Foreword This British Standard has been prepared under the direction of Technical Committee B/505 “Wastewater Engineering”. It supersedes BS 5572:1
21、978, which is withdrawn. The recommendations on design and workmanship are based on improved technology in plumbing and research undertaken by the Building Research Establishment and product manufacturers, the results of which have been proved in practice. In particular, the sizing of pipework, the
22、grouping of appliances for drainage purposes, the calculation of discharge flows, the jointing of pipes and fittings of varying materials and maintenance aspects have all been covered in greater detail. This revision has come at a time when changes are likely in the ranges of pipe sizes available. T
23、his should not cause difficulty as, generally, small variations from the stated internal diameter do not critically affect performance. An exception is an unvented branch pipe serving a single wash basin, the size of which does have a pronounced effect on performance. The type of basin and trap also
24、 has an influence. Consequently, a minimum size has been quoted for this arrangement, for a particular basin and trap design. Work is in hand to provide more data for a range of pipe sizes, basin and trap types. A new clause (5) dealing with the performance requirements of discharge pipe systems has
25、 been included and it is hoped that this can be enlarged in future revisions of this standard to enable performance to be included in more detail than is possible at present. The drawings contained in this standard are only diagrammatic, their purpose being to complement the text and portray design
26、principles. The normative references are currently all British Standards. As European Standards are published they will replace the relevant British Standards and be the subject of amendment to this publication. BSI recognizes that the European committee CEN/TC 165 is in the process of drafting a pe
27、rformance specification for drainage systems inside buildings, for publication in late 1995. The UK has participated in this work and expects this code of practice to be fully consistent with the requirements of the European Standard. The UK will willingly withdraw those parts of BS 5572 that are fo
28、und to be either in conflict with, or the same as, the published European Standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itse
29、lf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 76, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be in
30、dicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5572:1994 BSI 03-19991 1 Scope This British Standard gives recommendations for the design, installation, testing and maintenance of
31、above ground gravity sanitary pipework and fittings for domestic, commercial and public buildings, with the exception of trade waste discharges and any special requirements of buildings such as hospitals or research laboratories. NOTEThe term above ground includes all pipework within or on the build
32、ing including any basement(s), but excluding any pipework which has entered the ground, either externally or as the result of penetrating the lowest floor level or an outer wall of the building. 2 References 2.1 Normative references This British Standard incorporates, by dated or undated reference,
33、provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page 76. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this Briti
34、sh Standard only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informative references This British Standard refers to other publications that provide information or guidance.
35、 Editions of these publications current at the time of issue of this standard are listed on page 76, but reference should be made to the latest editions. 2.3 Materials, appliances and components All materials, appliances and components used in the discharge system described should conform to the rel
36、evant British Standards listed in Annex A. 3 Definitions For the purposes of this British Standard, the definitions given in BS 6100-2.7:1992 and Section 3.3:1992 apply, some of which have been reproduced below, together with the following. NOTEFor the purposes of this standard, pipes and pipework i
37、nclude fittings. 3.1 access cover a removable cover on pipes and fittings providing access to the interior of pipework for the purposes of inspection, testing and cleansing 3.2 branch discharge pipe a discharge pipe connecting sanitary appliances to a discharge stack NOTERepeated from BS 6100. 3.3 b
38、ranch ventilating pipe ventilating pipe connected to a branch discharge pipe NOTERepeated from BS 6100. 3.4 criterion of satisfactory service the percentage of time during which the design discharge flow loading will not be exceeded 3.5 crown of trap the topmost point of the inside of a trap outlet
39、3.6 depth of water seal the depth of water which would have to be removed from a fully charged trap before air could pass freely through the trap 3.7 discharge pipe pipe which conveys the discharge from a sanitary appliance NOTERepeated from BS 6100. 3.8 discharge unit a unit so chosen that the rela
40、tive load-producing effect of sanitary appliances can be expressed as multiples of that unit NOTEThe discharge unit rating of an appliance depends on its rate and duration of discharge, on the interval between discharges and on the chosen criterion of satisfactory service. It is not a simple multipl
41、e of a rate of flow. 3.9 sanitary pipework arrangement of discharge pipes, with or without ventilating pipes, connected to a drainage system NOTERepeated from BS 6100. 3.10 size the term used in this standard to indicate the nominal internal diameter of pipes regardless of specific materials and the
42、ir classification or description in other publications NOTEThe relationship between size as used in this standard and as in other publications is shown in Table 1. 3.11 stack a main vertical discharge or ventilating pipe Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006,
43、 Uncontrolled Copy, (c) BSI BS 5572:1994 2 BSI 03-1999 3.12 stack vent extension of a vertical discharge pipe above the highest discharge pipe connection that terminates in an end open to atmosphere NOTERepeated from BS 6100. 3.13 trap pipe fitting or part of a sanitary appliance that retains liquid
44、 to prevent the passage of foul air NOTERepeated from BS 6100. 3.14 anti-syphon trap a trap that includes a self-closing valve, which permits air to enter when suction occurs during discharge, to prevent siphonage NOTEAlso known as anti-vacuum trap. 3.15 resealing trap a trap that retains sufficient
45、 liquid during a discharge to ensure a seal of at least 25 mm depth after siphonage has occurred 3.16 ventilating pipe pipe provided to limit the pressure fluctuations within the discharge pipe system NOTERepeated from BS 6100. 4 Exchange of information 4.1 General Consultation is essential between
46、clients, architects and engineers at all stages of the design of buildings to ensure efficient and economic planning of the sanitary installations and the discharge system and the provision and positioning of ducts, in relation to the building as a whole. Details of sewers and any precautions necess
47、ary to ensure satisfactory working of the discharge systems, for example information on the possibility of surcharging and details of statutory regulations, should be obtained from the local authority. Specific requirements of the water companies should be ascertained. Alterations or extensions to e
48、xisting work will probably need a survey and report which should include the following: a) the type of drainage system in use and drain and sewer loadings; b) details and positions of appliances connected to the system; c) a description of the pipework and its condition; d) particulars of the ventil
49、ation of the pipework system; e) the results of tests (see 10.3). 4.2 Statutory requirements Attention is directed to the following statutory requirements relating to matters dealt with in this standard. a) Public Health Act 1936 and 1961 and London Government Act 1963 1. b) Building Act 1984 2. c) Current Building Regulations for England and Wales, Northern Ireland and Scotland 3. d) Sewerage (Scotland) Act 1968 4. e) Food Act 1984 5. f) Food Hygiene (General) Regulations 1970 6. g) Healt
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