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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 8313 : 1997 ICS 91.140
2、.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Code of practice for Accommodation of building services in ducts Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8313 : 1997 This Br
3、itish Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 July 1997 BSI 1997 First published as CP 413, March 1951 Second edition July 1973 Third edition July 1
4、989 Fourth edition July 1997 The following BSI references relate to the work on this standard: Committee reference B/209/14 Draft for comment 96/103803 DC ISBN 0 580 27363 6 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation
5、 of this British Standard was entrusted to Technical Committee B/209/14, Building services, upon which the following bodies were represented: Combustion Engineering Association Institute of Plumbing British Gas plc Chartered Institution of Building Services Engineers Clay Pipe Development Associatio
6、n Limited Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8313 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover Forewordiii Code of practice1 1Scope1 2References1 3Definitions1 4Exchan
7、ge of information2 5Materials and components2 6General2 7Restrictions on positioning and combination of services3 8Space requirements6 9Access7 10Protection of services in ducts10 11Drainage of service ducts10 12Ventilation of service ducts10 13Fire precautions12 14Other safety precautions14 15Servi
8、ce entries and exits15 16Identification and marking16 17Duct construction16 18Inspection and testing17 19Maintenance17 Annexes A(informative) Installation space for air ducts (detailed method)18 B(informative) Installation space for air ducts (simplified method)39 C(informative) Work in confined spa
9、ces42 D(informative) Acts, bylaws and statutory regulations42 Tables 1Free area of ventilation opening for dispersal of small leaks11 A.1 Dimensions where f1= 100 and f2= 30027 A.2 Dimensions where f1= 100 and f2= 30028 A.3 Dimensions where f1= 100 and f2= 30029 A.4 Dimensions where f1= 100 and f2=
10、30030 A.5 Values of eaand eb31 A.6 Values of ea1, ea2, eb1and eb231 A.7 Values of ea1, ea2, eb1and eb2by firm obstacles33 A.8 Values of n for a firm obstacle on one side36 A.9 Values of n for a firm obstacle on two sides37 A.10 Values of n for a firm obstacle on three sides37 A.11 Values of n for a
11、firm obstacle on four sides38 B.1Dimensions of X41 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8313 : 1997 ii BSI 1997 Figures 1Minimum sizes of access openings for passage by persons7 2Anthropometric da
12、ta8 A.1 Space with limitations due to firm obstacles20 A.2 Jointing and supporting air ducts without insulation and with a firm obstacle on one side20 A.3 Jointing and supporting air ducts without insulation and with a firm obstacle on two sides21 A.4 Jointing and supporting air ducts without insula
13、tion and with a firm obstacle on three sides21 A.5 Jointing and supporting air ducts without insulation and with a firm obstacle on four sides (obstacle not continuous for more than 1 m)22 A.6 Jointing and supporting pre-insulated air ducts with a firm obstacle on one side22 A.7 Jointing and support
14、ing pre-insulated air ducts with a firm obstacle on two sides23 A.8 Jointing and supporting pre-insulated air ducts with a firm obstacle on three sides23 A.9 Jointing and supporting pre-insulated air ducts with a firm obstacle on four sides (obstacle not continuous for more than 1 m)24 A.10 Insulati
15、on of an air duct in position with a firm obstacle on one side24 A.11 Insulation of an air duct in position with a firm obstacle on two sides25 A.12 Insulation of an air duct in position with a firm obstacle on three sides25 A.13 Insulation of an air duct in position with a firm obstacle on four sid
16、es (obstacle not continuous for more than 1 m)26 A.14 Examples of installation spaces for flange jointed air ducts26 A.15 Installation space dimensions A and B for flange jointed air ducts with a firm obstacle on one side27 A.16 Installation space dimensions A and B for flange jointed air ducts with
17、 a firm obstacle on two sides28 A.17 Installation space dimensions A and B for flange jointed air ducts with a firm obstacle on three sides29 A.18 Installation space dimensions A and B for flange jointed air ducts with a firm obstacle on four sides30 A.19 Examples of installation space for slip join
18、ted air ducts31 A.20 Installation space dimensions A and B for slip jointed air ducts with a firm obstacle on one or more sides32 A.21 e-values33 A.22 Minimum access allowance e for air ducts insulated in position34 A.23 Installation space dimensions A and B for air ducts insulated in position with
19、a firm obstacle on one side34 A.24 Installation space dimensions A and B for air ducts insulated in position with a firm obstacle on two sides35 A.25 Installation space dimensions A and B for air ducts insulated in position with a firm obstacle on three sides35 A.26 Installation space dimensions A a
20、nd B for air ducts insulated in position with a firm obstacle on four sides36 B.1Installation spaces for uninsulated or pre-insulated air ducts40 B.2Installation spaces for air ducts insulated after installation41 Index44 List of references47 Licensed Copy: London South Bank University, London South
21、 Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1997iii BS 8313 : 1997 Foreword This British Standard has been prepared under the direction of the Technical Committee B/209. It supersedes BS 8313 : 1989, which is withdrawn. This edition introduces technical chang
22、es but it does not reflect a full review or revision of the document, which will be undertaken in due course. This code of practice is intended to provide architects, engineers, builders, contractors, suppliers, specialists, and service engineers with recommendations for the design, construction, in
23、stallation and maintenance of ducts in buildings for the accommodation of services. It also covers ducts attached to the outside of buildings, suspended flooring and ceiling voids, and cavities which are used for services but not always referred to as ducts. Annex A gives a detailed method for calcu
24、lating the minimum cross-sectional dimensions of space required in service ducts for the installation and maintenance of thin walled HVAC ducting and annex B provides a simplified method for doing the same calculation. Annex C draws attention to the stressful nature and potential hazards associated
25、with working in a confined space and annex D lists Acts, bylaws and statutory regulations which relate to the accommodation and maintenance of building services in ducts. As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it wer
26、e a specification and care should be taken to ensure that claims of compliance are not misleading. In particular, attention is drawn to 6.1 and the fact that statutory legislation may impose more stringent requirements in certain circumstances. The standard should not be regarded as a substitute for
27、 expert advice. The intention is that it should complement it. Every fire authority has Fire Prevention Officers who will advise designers, owners and occupiers and who will welcome liaison with architects and facilities engineers on the safety aspects of building design. Advice can also be obtained
28、 from the Health and Safety Executive and from local authorities on matters relating to health and safety, and from Building Control Officers if new buildings or major alterations are involved. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of p
29、ages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 48, an inside back cover and a back cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ivblank Licensed Copy: Lon
30、don South Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19971 BS 8313 : 1997 Code of practice 1 Scope This British Standard gives recommendations for the design, construction, installation and maintenance of ducts in buildings used
31、for the accommodation of services. It also covers enclosures such as ceiling voids and cavities which are used for services but which are not always referred to as ducts. The recommendations in this standard should also be applied as far as practicable to the adaptation, modification or refurbishmen
32、t of existing ducts and services within them. Appropriate precautions should be taken in all cases where the existing ducts contain hazardous materials, e.g. asbestos. This standard covers service ducts attached to the outside of buildings but not service ducts between buildings. This standard does
33、not cover the design and construction of air or refuse ducts, nor those with heart units, packaged plumbing or service walls, although parts of it are relevant to them. This standard does not cover spaces intended mainly for purposes other than the accommodation of services, nor with plant areas suc
34、h as boiler and calorifier rooms or gas storage areas. The piping of radioactive substances and the specialist requirements for piping cryogenic liquids are generally outside the scope of this standard. 2 References 2.1 Normative references This standard incorporates, by dated or undated reference,
35、provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page 47. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this stand
36、ard 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 standard refers to other publications that provide information or guidance. Editions of the
37、se publications current at the time of issue of this standard are listed on page 48, but reference should be made to the latest editions. 3 Definitions For the purposes of this British Standard the definitions given in BS 6100 apply, together with the following. 3.1 duct Space formed for the passage
38、 of cables, pipes, etc. 3.2 service duct Duct that allows working space. 3.3 pipe sleeve Protective pipe through which a carrier pipe or cable is later passed. 3.4 cavity barrier Construction provided to seal a cavity against the penetration of smoke and flame, or within a cavity to restrict the mov
39、ement of smoke and flame within the cavity. 3.5 fire compartmentation Division of a building into compartments by elements of building construction intended to resist the passage of fire, and capable of meeting specified performance criteria to those ends. 3.6 fire door Door or shutter provided for
40、the passage of persons, air or objects which, together with its frame and furniture as installed in a building, is intended when closed to resist the passage of fire and/or gaseous products of combustion and is capable of meeting specified performance criteria to those ends. 3.7 fire resistance Abil
41、ity of a component or construction of a building to satisfy for a stated period of time some or all of the criteria specified in BS 476 : Part 4 and BS 476 : Part 24, covering stability, integrity and insulation. 3.8 fire stop Seal provided to close an imperfection of fit between elements, component
42、s or construction in a building, or in any joint, so as to restrict penetration of smoke and flame through that imperfection or joint. 3.9 firm obstacle Any obstacle that will interfere with the installation, dismantling or maintenance of a service. 3.10 flash point Lowest temperature at which vapou
43、r from oil, etc. can be ignited by an external source. 3.11 installation space Recommended minimum space necessary for the installation and maintenance of one or more services where access is limited by a firm obstacle. It is expressed as a rectangular envelope at right angles to and at any point al
44、ong a run of services. It includes allowances for supports, thermal and sound insulation, and safety margins. 3.12 material of limited combustibility Material that conforms to any of the specifications given for materials of limited combustibility in the Approved Document published in connection wit
45、h B2/B3/B4 of the Building Regulations 19911. 3.13 nominal size Size used in the designation of appliance or component. 3.14 protected shaft Stairway, lift, escalator, chute, duct, or other shaft which enables persons, objects or air to pass from one compartment to another. Licensed Copy: London Sou
46、th Bank University, London South Bank University, Fri Dec 08 06:10:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BSI 1997 BS 8313 : 1997 3.15 protected stairway Stairway, including any exit passageway leading therefrom to its final exit, enclosed with (other than any part that is an external wall
47、of a building) fire-resisting construction. 3.16 budget lock Lock that has a pivoted tongue, that, when turned 90 by a key, swings into a slot striking plate to serve as a deadbolt. 4 Exchange of information 4.1 Responsibility for design Before work is begun, a person should be appointed to be respo
48、nsible for design of the service ducts and co-ordination of the services within them. 4.2 Consultation and co-ordination The necessary consultation and co-ordination should be carried out and particular attention should be paid to the following points: a) brief from client; b) system for ensuring th
49、at drawings and specifications reach those who need them; c) system for spatial co-ordination; d) project programme; e) consultation with planning, building regulations and fire authorities; f) consultation with gas, electricity, water, sewerage and telecommunications authorities; g) consultation with insurers; h) consultation with suppliers of special services such as industrial and medical gases (or other authoritative source); i) operation and maintenance instructions; j) the possibility of increased future requirements owing to further development within or adjacent to t
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