1、July 2009 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 9
2、1.140.30!$mzp“1748777www.din.deDDIN 1946-7Ventilation and air conditioning Part 7: Ventilation systems in laboratoriesEnglish translation of DIN 1946-7:2009-07Raumlufttechnik Teil 7: Raumlufttechnische Anlagen in LaboratorienEnglische bersetzung von DIN 1946-7:2009-07Ventilation Partie 7: Systmes de
3、 ventilation pour laboratoiresTraduction anglaise de DIN 1946-7:2009-07SupersedesDIN 1946-7:1992-06www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1606.11 DIN 1946-7:2009-07 Contents Page Foreword. 3 Introduction 4 1 Scope . 5 2 No
4、rmative references . 5 3 Terms and definitions 5 4 Tasks of the HVAC system 8 5 Planning and design of HVAC systems . 9 5.1 General. 9 5.2 Planning criteria 9 5.3 Air volume flow rates . 10 5.3.1 General. 10 5.3.2 Supply air volume flow rates for all rooms as in 5.3.3 to 5.3.8 10 5.3.3 Extract air v
5、olume flow for laboratory rooms10 5.3.4 Extract air volume flow rates for solvent storage rooms . 11 5.3.5 Extract air volume flow for chemicals storage rooms 11 5.3.6 Extract air volume flow for rooms for pressurized gas cylinder storage . 11 5.3.7 Extract air volume flow for temperature-controlled
6、 rooms 11 5.3.8 Extract air volume flow for storage of cryogenic gases. 12 5.4 Fume cupboards. 12 5.5 Other extract air equipment. 12 5.6 Air flows within the room. 13 5.7 Quality of room air 13 6 Supply air and extract air systems . 13 6.1 General. 13 6.2 Supply air system . 13 6.3 Extract air syst
7、em. 14 6.3.1 Air routing 14 6.3.2 Retainment and filter systems. 14 6.3.3 Maintenance and repair 14 6.3.4 Explosion protection 14 7 Sound pressure level . 15 8 Special requirements for HVAC systems in microbiology laboratories . 15 9 Labelling 15 Bibliography . 16 2 A comma is used as the decimal ma
8、rker. DIN 1946-7:2009-07 Foreword This standard has been prepared by Working Committee NA 055-02-01 AA Abzge und Laborlufttechnik of the Normenausschuss Laborgerte und Laboreinrichtungen (FNLa) (Laboratory Devices and Installations Standards Committee) together with the Working Committee NA 041-02-5
9、3 AA Sonderrume of the Normenausschuss Heiz- und Raumlufttechnik (Heating and Ventilation Technology Standards Committee). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifyin
10、g any or all such patent rights. DIN 1946 Ventilation and air conditioning comprises: Part 3: Air conditioning of passenger cars and commercial vehicles Part 4: VAC systems in buildings and rooms used in the health care sector Part 6: Ventilation for residential buildings General requirements, requi
11、rements for measuring, performance and labelling, delivery/acceptance (certification) and maintenance Part 7: Ventilation systems in laboratories Amendments The standard differs from DIN 1946-7:1992-06 as follows: a) requirements have been supplemented with functional aspects; b) air volume flows ha
12、ve been adapted to laboratory functions in a more flexible manner; c) air volume flows for adjacent rooms and special rooms are now to be taken into consideration in design and planning; d) safety requirements have been aligned with the 2005 edition of the Gefahrstoffverordnung GefStoffV (German Haz
13、ardous Substances Ordinance); e) requirements for heating, ventilation and air conditioning (HVAC) systems in microbiological laboratories are now included; f) new European Standards on the ventilation of buildings and for saving energy have been taken into consideration and referred to. Previous ed
14、itions DIN 1946-7: 1992-06 3 DIN 1946-7:2009-07 Introduction The operation of heating, ventilation and air conditioning (HVAC) systems in laboratory buildings or in individual laboratory rooms requires particular care and attention due to their relevance to safety. This applies for users of ventilat
15、ion and air conditioning systems as well as for operators of laboratory buildings. This standard supports the planning, execution and maintenance of such HVAC systems. Special expertise with regard to workflows in laboratories and the modes of operation of technical laboratory equipment is required
16、particularly because of the many possible interfaces to safety-relevant extract air equipment. 4 DIN 1946-7:2009-07 1 Scope This standard applies to the planning and execution of heating, ventilation and air conditioning systems (hereinafter referred to as HVAC systems) for industrial laboratories a
17、nd laboratories in universities and institutes. It also applies to HVAC systems in science classrooms in schools if these are equipped with such a system. This standard does not stipulate, however, when laboratories or science classrooms in schools are to be equipped with a HVAC system; for this pur
18、pose superordinate rules and regulations apply that shall be taken into account. This standard only specifies the tasks of and requirements for HVAC systems. This standard not only applies to laboratories in a narrower sense, but also to laboratory-related rooms in which work with hazardous substanc
19、es is performed. 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 any amendments) applies. DIN EN 12
20、128:1998-05, Biotechnology Laboratories for research, development and analysis Containment levels of microbiological laboratories, areas of risk, localities and physical safety requirements DIN EN 12792:2004-01, Ventilation for buildings Symbols, terminology and graphical symbols DIN EN 13779:2007-0
21、9, Ventilation for non-residential buildings Performance requirements for ventilation and room conditioning systems DIN EN 14175-1:2003-08, Fume cupboards Part 1: Vocabulary DIN EN 15251, Indoor environmental input parameters for design and assessment of energy performance of buildings addressing ai
22、r quality, thermal environment, lighting, and acoustics VDI 2081 Part 1, Noise generation and noise reduction in air-conditioning systems 3 Terms and definitions For the purposes of this document the terms and definitions according to DIN EN 12792 and the following apply. For the different types of
23、air in a laboratory or in a laboratory building (such as extract air, recirculation air, exhaust air) DIN EN 13779:2007-09, Table 2 applies. 3.1 laboratory spatially defined area with specific technical requirements for ventilation NOTE In a laboratory, tasks are usually carried out during which pos
24、sible hazards, e.g. those generated by substances or procedures, can be kept under control. A HVAC system is usually essential for such tasks. 3.2 useable laboratory floor space floor space of a laboratory room or a laboratory area; not included as useable laboratory floor space are constructionally
25、 separate corridors and areas used for writing or analysis of results with separate ventilation or air conditioning NOTE Areas for writing or analysis of results can be considered to be separate from the useable laboratory floor space where there is a suitable directed air flow, for instance. 5 DIN
26、1946-7:2009-07 3.3 extract air equipment laboratory equipment that requires specified extract air flows for its proper functioning, e.g. fume cupboards and safety cabinets or laminar flow workbenches with exhaust air connection NOTE Extract air equipment may need constant, intermittent or a continuo
27、usly changing (hereinafter referred to as “variable”) extract air. Knowledge of all extract air equipment in a laboratory (see 3.4 to 3.14) is important for balancing the air flows in the HVAC system. 3.4 fume cupboard protective device to be ventilated by an induced flow of air through an adjustabl
28、e working opening with an enclosure designed to limit the spread of airborne contaminants to operators and other personnel outside the device, offering a degree of mechanical protection, and providing for the controlled release of airborne contaminants DIN EN 14175-1:2003-08 3.5 air-extracted workpl
29、ace laboratory equipment similar to a fume cupboard that provides almost the same protection level as a fume cupboard, but not to the full extent NOTE Such a workplace is deemed to be extract air equipment. The full protection of a fume cupboard is not achieved at air-extracted workplaces, for insta
30、nce physical protection against splashes and splinters cannot be given. 3.6 air-extracted enclosure extract air equipment for achieving localized air distribution and which usually meets one of the protective aims named in 3.4, e.g. dilution of pollutants in interiors to avoid hazardous, explosive a
31、tmospheres 3.7 local extractor extract air equipment for localized air distribution, e.g. to extract air around devices and open bottles or drums, usually by means of a flexible hose 3.8 relief pipework pipeline manifold in a laboratory, usually under low vacuum, for connecting laboratory equipment
32、outlets without a significant extract air flow NOTE Relief pipework (with a pump that creates a vacuum) is normally deemed to be extract air equipment. 3.9 safety cabinet laboratory safety equipment for storing and providing substances in bottles, drums etc. that may contribute to the fire load or o
33、ther hazards in case of fire in a laboratory NOTE Safety cabinets are deemed to be extract air equipment if they are operated with exhaust air. This is the most frequent operating mode. For safety cabinets for flammable liquids see DIN EN 14470-1, for safety cabinets for pressurized gas cylinders se
34、e DIN EN 14470-2. 6 DIN 1946-7:2009-07 3.10 weighing station workplace at which toxic substances are weighed and having directed air distribution so that airflows do not influence the weighing process NOTE A weighing station is usually deemed to be extract air equipment. 3.11 bench extractor extract
35、 air equipment for directed air distribution above or to the side of a laboratory bench NOTE A bench extractor is usually designed as a hood for capturing and removing ascending gases or vapours, e.g. for hydrogen or hot extract air rising from analytical equipment, for instance. 3.12 under bench ex
36、tractor extract air equipment for directed air distribution below a laboratory bench NOTE An under bench extractor is usually designed to remove gases or vapours with a higher density than air and can be in the form of a perforated worktop (downdraught bench), for example. 3.13 under bench furniture
37、 extractor extract air equipment for extracting air from underneath cabinets or furniture 3.14 floor extractor extract air equipment for directed air distribution of air near the floor NOTE The floor extractor can be freestanding, integrated into laboratory furniture, or embedded in floors or walls.
38、 3.15 HVAC system for laboratories totality of permanently installed technical equipment for supplying and disposing of air to and from a laboratory and its equipment, where such equipment can be clearly considered to be part of the building infrastructure NOTE HVAC systems usually comprise air inta
39、kes and outlets, piping and ducts for ventilation purposes, regulators, valves, control devices, fans, sound attenuators, etc. The interface to the laboratory furniture is usually at the planned ventilation connection to the respective laboratory furniture or in the wall or ceiling intake and outlet
40、 of the laboratory (room). 3.16 air exchange ratio of extract air volume to room volume NOTE The air exchange is usually expressed in h1. 3.17 solvents room room with special equipment for storing or providing, in closed vessels, organic solvents and other substances with a low ignition point 3.18 c
41、hemicals storage room room that is particularly used to store or provide chemicals in closed vessels NOTE Collection rooms in schools are not regarded as chemicals storage rooms. 7 DIN 1946-7:2009-07 3.19 outdoor air air entering the system or opening from outdoors before any air treatment DIN EN 13
42、779:2007-09, Table 2 3.20 supply air airflow entering the treated room, or air entering the room after any treatment in the system 3.21 extract air airflow leaving the treated room DIN EN 13779:2007-09, Table 2 3.22 recirculation air extract air that is returned to the air treatment system and reuse
43、d as supply air DIN EN 13779:2007-09, Table 2 3.23 exhaust air airflow discharged to the atmosphere DIN EN 13779:2007-09, Table 2 3.24 secondary air airflow taken from a room and returned to the same room after any treatment DIN EN 13779:2007-09, Table 2 4 Tasks of the HVAC system HVAC systems in la
44、boratories shall fulfil the following three tasks. a) HVAC systems shall remove and dilute hazardous substances (gases, vapours, dust, aerosols) released in laboratories to such an extent that health risks through inhalation are avoided. Here the principle applies that hazardous substances should be
45、 captured and discharged directly from the point of origin, see extract air equipment, e.g. fume cupboard according to 3.4. NOTE The air in the occupied area, usually ranging from the floor to a height of 2 m, is regarded as air for breathing. b) The HVAC system of a laboratory shall not only ensure
46、 there is sufficient air exchange within the room but also meet the spatial and temporal needs of the laboratory equipment and devices (extract air equipment, see 3.3) for extract and supply air, for example in the case of variable air volume flows for fume cupboards, or in the case of pressure vari
47、ations. The specific air exchange need within a laboratory (room) can be met by the air flow volumes extracted by the extract air equipment in that laboratory. In this case, the ventilation of a laboratory does not have to be supported by additional exhaust air openings associated with the room. Add
48、itional extract air equipment in a laboratory may also be expedient when operated in secondary air mode (see 3.24), for instance for heating or cooling, or for filtration. 8 DIN 1946-7:2009-07 c) The room air quality shall be ensured in accordance with DIN EN 13779 and DIN EN 15251. This particularly applies for ensuring comfort according to the criteria stipulated in DIN EN 15251, e.g. for humidity, turbulence, air velocity and temperature. 5 Planning and design of HVAC systems 5.1 General Requirements for HVAC syste
