1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Equipment used in the controlled removal of asbestos-containing materials Part 2: Negative pressure units Specifi
2、cationBS 8520-2:2009BS 8520-2:2009 BRITISH STANDARDnullublishing and copnullright informationThe BSI copyright notice displayed in this docnullnullent indicates nullhen the docnullnullent nullas last issnullednullnull BSI 2009ISBN 9null8 0 580 nullnull5null9 5InullS nullnullnull0null0nullnull0The nu
3、llollonulling BSI renullerences relate to the nullornull on this standard: nullonullnullittee renullerence HSnullnull Dranullt nullor conullnullent 09nullnull0null89955 Dnullnullublication histornullnullirst pnullnulllished as nullAS null0-2:200nullnullnullnulllished as BS 8520-2null Decenullnuller
4、2009nullmendments issued since publicationnullate nullenullt affected BRITISH STANDARDnull BSI 2009 null iBS 8520-2:2009nullontentsnullorenullord iiiIntrodnullction 1null Scope 12 Nornullatinulle renullerences 1null Ternulls and denullnitions 1null Design and constrnullction 25 nullontrol enullnulli
5、pnullent 5null Instrnullctions nullor installationnull operation and nullaintenance 5null Technical literatnullre 68 nullanullelling 79 nullonnullornullity nullarnulling 7nullnnenullesAnnenull A nullnornullatinullenull Airnullonull pernullornullance test 8Annenull B nullinnullornullatinullenull Airn
6、ullonull pernullornullance test report 10Binullliography 11nullist of nullguresnullignullre null null nullnullanullple negatinulle pressnullre nullnit 3nullignullre Anullnull null Airnullonull pernullornullance test 9nullignullre Bnullnull null nullnullanullple onull an airnullonull pernullornullanc
7、e test report 10Summarnull of pagesThis docnullnullent conullprises a nullront conullernull an inside nullront conullernull pages i to inullnull pages null to null2null an inside nullacnull conuller and a nullacnull conullernullBS 8520-2:2009ii null null BSI 2009BRITISH STANDARDThis page deliberatel
8、y left blankBRITISH STANDARDnull BSI 2009 null iiiBS 8520-2:2009nullorenullordnullublishing informationThis British Standard is pnullnulllished nully BSI and canulle into enullnullect on nullnull Decenullnuller 2009null It nullas prepared nully Snullnullconullnullittee HSnullnullnullnullnull Asbesto
9、s nullnder the anullthority onull Technical nullonullnullittee HSnullnull Occupational health and safety nullanagenullentnull A list onull organinullations represented on this conullnullittee can nulle onulltained on renullnullest to its secretarynullSupersessionThis part onull BS 8520 is nullased o
10、n nullAS null0-2:200nullnull nullhich is nullithdranullnnullnullelationship nullith other publicationsThis British Standard is one part onull a seriesnull nullnulluipnullent used in the controlled renullonullal of asbestosnullcontaining nullaterialsnull the other parts onull nullhich are:null nullar
11、t 1null nullontrolled nulletting of Asbestosnullcontaining nullaterials null nullpecinullcationnullnull nullart 3null Operationnull cleaning and nullaintenance of class null nullacuunullcleaners null nullode of practicenullThis British Standard is one onull three parts denulleloped nullronull the nu
12、llAS docnullnullents nullnulluipnullent used in the controlled renullonullal of asbestosnullcontaining nullaterials:null nullart 1null nullontrolled nulletting of asbestosnullcontaining nullaterials null nullpecinullcationnullnull nullart 2null nullegatinulle nullressure nullnits null nullpecinullca
13、tionnullnull nullart 3null Operationnull cleaning and nullaintenance of class null nullacuunullcleaners null nullode of practicenullnullanullard nullarningsnullnullnullnullnullnullnullnull This British Standard calls nullor the nullse onull snullnullstances andnullor procednullres that can nulle inn
14、ullnullrionulls to health inull adenullnullate precanulltions are not tanullennull It renullers only to technical snullitanullility and does not anullsolnulle the nullser nullronull legal onullligations relating to health and sanullety at any stagenullnullse of this documentIt has nulleen assnullnul
15、led in the preparation onull this British Standard that the enullecnulltion onull its pronullisions nullill nulle entrnullsted to appropriately nullnullalinulled and enullperienced peoplenull nullor nullhose nullse it has nulleen prodnullcednullnullresentational conventionsThe pronullisions onull th
16、is standard are presented in ronullan nullinullenull nullprightnulltypenull Its renullnullirenullents are enullpressed in sentences in nullhich the principal anullnulliliary nullernull is nullshallnullnullnullonullnullentarynull enullplanation and general infornullatinulle nullaterial is presented i
17、n snullaller italic typenull and does not constitute a nornullatinulle elenullentnullBS 8520-2:2009inull null null BSI 2009BRITISH STANDARDnullontractual and legal considerationsThis pnullnulllication does not pnullrport to inclnullde all the necessary pronullisions onull a contractnull nullsers are
18、 responsinullle nullor its correct applicationnullnullompliance nullith a British Standard cannot confer immunitnull from legal obligationsnullIn particnulllarnull attention is dranulln to the nullollonulling statnulltory regnulllationsnullThe nullontrol onull Asnullestos Regnulllations 200null null
19、nullnullThe nullontrol onull Asnullestos Regnulllations nullNorthern Irelandnull 200null null2nullThe nulllectrical nullnullnullipnullent nullSanulletynull Regnulllations null99null nullnullnullThe nulllectricity at nullornull Regnulllations null989 nullas anullendednull nullnullnullThe nulllectrici
20、ty at nullornull Regnulllations nullNorthern Irelandnull null99null null5nullThe Health and Sanullety at nullornull etcnull Act null9nullnull nullas anullendednull nullnullnullThe nullachinery Directinulle 98nullnullnullnullnullnull nullas anullendednull nullnullnullThe Snullpply onull nullachinery
21、nullSanulletynull Regnulllations 2008 null8nullThe nullronullision and nullse onull nullornull nullnullnullipnullent Regnulllations nullas anullendednull null998 null9nullThe nullronullision and nullse onull nullornull nullnullnullipnullent Regnulllations nullNorthern Irelandnull null999 nullas anul
22、lendednull nullnull0nullThe Sinullple nullressnullre nullessels nullSanulletynull Regnulllations null99null nullas anullendednull nullnullnullnullThe nullontrol onull Snullnullstances Hanullardonulls to Health Regnulllations 2002 nullas anullendednull nullnull2nullThe nullanagenullent onull Health n
23、ull Sanullety at nullornull Regnulllations null999 nullas anullendednull nullnullnullnullThe Special nullaste nullScotlandnull Regnulllations 200null nullas anullendednull nullnullnullnullThe Hanullardonulls nullaste Regnulllations nullnullngland and nullalesnull 2005 nullas anullendednull nullnull5
24、nullThe Hanullardonulls nullaste Regnulllations nullNorthern Irelandnull 2005 nullas anullendednull nullnullnullnullBRITISH STANDARDnull BSI 2009 null nullBS 8520-2:2009nullntroductionThis British Standard has nulleen denulleloped to pronullide negatinulle pressnullre nullnit nullNnullnullnull nulla
25、nnullnullactnullrers nullith a nullininullnullnull specinullcation nullor the nullannullnullactnullre onull NnullnullsnullAlthonullgh the nullannullnullactnullre onull Nnullnulls has prenullionullsly nullet the enullpectations onull the asnullestos renullonullal indnullstrynull no specinullcations o
26、r specinullc gnullidance enullistednull It nullas therenullore nullelt that there nullas a need to pronullide the asnullestos renullonullal indnullstry nullith a nullininullnullnull specinullcation to raise indnullstry standardsnull nullith particnulllar attention to health and sanullety issnullesnu
27、llnull ScopeThis British Standard specinulles renullnullirenullents nullor portanullle andnullor transportanullle negatinulle pressnullre nullnits nullNnullnullsnull incorporating HnullnullA nulllters conullered nully BS nullN null822 nullor nullse in the controlled renullonullal onullasnullestos-co
28、ntaining nullaterials nullAnullnullsnullnullThis British Standard is also applicanullle to Nnullnulls designed to create negatinulle pressnullre nullithin a portanullle decontanullination nullnit nullacility or nullornulling enclosnullre and tnullo-part NnullnullsnullThis British Standard is not app
29、licanullle to local enullhanullst nullentilationnull2 nullormative referencesThe nullollonulling renullerenced docnullnullents are indispensanullle nullor the application onull this docnullnullentnull nullor dated renullerencesnull only the edition cited appliesnull nullor nullndated renullerencesnu
30、ll the latest edition onull the renullerenced docnullnullent nullinclnullding any anullendnullentsnull appliesnullBS nullN null0nullnull5-2-null9null nullpecinullcation for safety of household and sinullilar electrical appliances null nullart 2null nullarticular renulluirenullents null nullart 2null
31、69null nullet and dry nullacuunull cleanersnull including ponuller brushnull for industrial and conullnullercial usenull nullerms and denullnitionsnullor the pnullrposes onull this British Standardnull the nullollonulling ternulls and denullnitions applynullnullnullnull anemometerinstrnullnullent nu
32、llor nulleasnullring air nullelocitynullnull2 damperdenullice nullsed to restrict airnullonullnullnullnull ductingnullenullinullle tnullnulle attached to the Nnullnull nullor dnullcting enullhanullst airnull sonulletinulles nulltted nullith a ronulling head nullnullnull8nullnullnullnull nulligh Efnu
33、llciencnull nullarticulate nullir nullnullEnullnullnullhighly enullnullcient nulllter elenullentnullOTnull 1 The abbrenulliation nullnullnullA is also used for nulligh nullfnullciency nullarticulate ArrestornullnullOTnull 2 nullnullnullA nulllters are also knonulln as essential nullltersnullnullnull
34、5 manometerinstrnullnullent to nulleasnullre pressnullre dinullnullerentialBS 8520-2:20092 null null BSI 2009BRITISH STANDARDnullnullnull non-return nullapsnullaps installed to prenullent renullerse airnullonullnullnullnull pre-nullltercoarse nulllter installednullsed prior to the HnullnullA nulllte
35、r nullhich renullonulles nullost onull the particnulllates to prenullent nulllocnulling onullnull or danullage tonull the HnullnullA nulllternullnull8 roving headnullree standingnull portanullle denullice thatnull nullhen connected nully a nullenullinullle dnullct to the inlet area onull a Nnullnull
36、 nullsing a tenullporary spigot plate nullnullnullnullnullnullnullenanullles localinulled air intanulle nullithin an asnullestos enclosnullre close to the nullornull areanullOTnull The denullice also has pronullision for a prenullnulllter to be located nullithin the ronulling headnullnullnull9 safet
37、null critical nulloints nulloints that contain or retain the HnullnullA nulllter in positionnullnullnull0 snullirtlight-nulleight tenullporary constrnullction to snullooth the airnullonull and allonullnullore accnullrate anenullonulleter readingsnullnullnullnull temporarnull spigot platedenullice th
38、at enanullles a nullenullinullle dnullct to nulle secnullred to the Nnullnull nullpre-nulllternullinlet areanull nullsnullally nullor the pnullrpose onull connecting a ronulling nulllter headnullnullnull2 transit coverclose-nulltting plate that protects the Nnullnull pre-nulllter nullace dnullring t
39、ransitnullnullnullnull nullornulling enclosurestrnullctnullre erected to prenullent the spread onull asnullestos and prenullent enullposnullre onull people onulltside the enclosnullre to asnullestos and nullaintain negatinulle pressnullre nullithin the enclosnullrenull nullesign and constructionnull
40、OnullnullnullnullTAnullnull Onull nullnullAnullnullnull 4 The design and construction renulluirenullents in nulllause 4 also relate to nullnullnulls used for the pronullision of negatinulle pressure nullithin a portable decontanullination facility and for tnullonullpart nullnullnulls nullsee nulligu
41、re 1nullnullnullor enulluipnullent nullith electrical or nullonulling partsnull attention is dranulln to the Snullpply onull nullachinery nullSanulletynull Regnulllations null8null nullhichnull in accordance nullith the nullachinery Directinulle nullDirectinulle 98nullnullnullnullnullnullnull null7n
42、ullnull renulluire nullachinery to be nullnull nullarkednullnullor enulluipnullent nullithout electrical or nullonulling partsnull attention is dranulln to nullection 6 of the Health and Sanullety at nullornull etcnull Act null6nullnullThe nullnullnull has to renullain intact if it is subnullected t
43、o abuse by operatorsnullnullurrentlynull honullenullernull no denullnitinulle test has been denulleloped to nullerify durability of the nullnullnullnull The renulluirenullents of 4.1 to 4.8null thereforenull refer to the robustness of the conullponent parts of the nullnullnull and not to the fully a
44、ssenullbled nullnullnullnullAn enullanullple nullnullnull is shonulln in nulligure 1nullBRITISH STANDARDnull BSI 2009 null nullBS 8520-2:2009nullignullre null Enullample negative pressure unit1023111784695nullenullnull nulllange2 HnullnullA nulllternull nullanonulleter ganullge null Non-retnullrn nu
45、llaps5 Transit conuller null Airnullonull direction null nullre-nulllter8 nullannullnullotor9 nullnullhanullst air spigotnull0 nullasters nullnull nulllangenullnullnull nulluter caseThe onullter case onull the Nnullnull shall nulle designed to anulloid dnullst traps and shall hanulle an easily clean
46、anullle snullrnullacenullnullOTnull Attention is dranulln to the nulllectrical nullnullnullipnullent nullSanulletynullRegnulllations 199null null3nullnullnullnull2 nullointsAll sanullety-critical nulloints nullade onull plastic shall nulle triple-nullelded in order to prenullent nullailnullrenullTo
47、nullininullinulle leanullsnull the onullter case shall nulle designed and constrnullcted nullith the nullininullnullnull nnullnullnuller onull nullointsnull All onull the other onullter case nulloints shall nulle nullelded thronullghonullt their entire lengthnullnullnullnull nullon-return nullapsNon
48、-retnullrn nullaps shall nulle nulltted to the Nnullnull nullat nullannullnullactnullrenull to prenullent renullerse airnullonull nullhen the Nnullnull is snullitched onullnull or is enullposed to a nullacnulldranullghtnullBS 8520-2:2009null null null BSI 2009BRITISH STANDARDnullnullnull nullransit
49、coverThe Nnullnull shall nulle nulltted nullith a transit conuller nullnullnullnull2null nullat nullannullnullactnullrenullthat protects the entire pre-nulllter nullacenull The transit conuller shall nulle designed so that it can nulle secnullrely nullnulled to ensnullre that the pre-nulllter nullace is sealed dnullring transitnullnullnull5 nullasters and handlesThe casters and handles onull the Nnullnull shall nulle secnullrely nullnulled to or thronullgh the onullter case and shall nulle capanullle onull nullearing the nulleight onull the NnullnullnullThe Nnullnull shall hanulle a nulli
