1、BS 8468-4:2008Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents Part 4: Powered air purifying respirators SpecificationICS 13.340.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright
2、 informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008ISBN 978 0 580 56883 1The following BSI references relate to the work on this standard:Committee reference PH/4Draft for comment 07/301492276 DCPublication historyFirst published Augu
3、st 2008Amendments issued since publicationAmd. no. Date Text affectedBS 8468-4:2008 BSI 2008 iBS 8468-4:2008ContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 14 Description 25 Designation 26 Requirements 47 Marking 78 Information supplied by the manufacturer 8AnnexesAnnex A
4、 (normative) Testing 9Annex B (normative) Test method for chemical agent permeation and penetration resistance against distilled sulfur mustard (HD) and sarin (GB) 9Annex C (normative) Use of optical systems external to the full facemask 21Annex D (normative) Relationship between this British Standa
5、rd and the Basic Safety Requirements of EU Directive 89/686/EEC Personal Protective Equipment 21Bibliography 23List of figuresFigure 1 Pictograms 8Figure B.1 Schematic diagram of HD droplet placement on PAPR (face-mounted blower/filter(s) unit) 13Figure B.2 Schematic diagram of HD droplet placement
6、on PAPR with drink tube (face-mounted blower/filter(s) unit) 14Figure B.3 Schematic diagram of HD droplet placement on PAPR with communicator (face-mounted blower/filter(s) unit) 15Figure B.4 Schematic diagram of HD droplet placement on PAPR (belt-mounted blower/filter(s) unit) facepiece with side h
7、ose connection 16Figure B.5 Schematic diagram of HD droplet placement on PAPR belt-mounted blower/filter(s) unit facepiece with central hose connection 17Figure B.6 Schematic diagram of HD droplet placement on PAPR hood (including inner mask) and belt-mounted blower/filter(s) unit 18Figure B.7 Schem
8、atic diagram of HD droplet placement on PAPR hood (without an inner face mask) and belt-mounted blower/filter(s) unit 19List of tablesTable 1 Maximum acceptable levels of permeation and penetration 5Table 2 Breakthrough times 6Table 3 Filter test challenge and test breakthrough concentrations 6Table
9、 B.1 Airflow characteristics for chemical agent permeation and penetration resistance test method (HD vapour) 12Table B.2 Airflow characteristics for chemical agent permeation and penetration resistance test method (GB vapour) 20Table D.1 Basic Safety requirements for PPE Comparison between the PPE
10、Directive, Annex II and BS 8468-4 21Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 23 and a back cover.BS 8468-4:2008ii BSI 2008ForewordPublishing informationThis British Standard was published by BSI. It was prepared by Technical Committee P
11、H/4, Respiratory protection. A list of organizations represented on this committee can be obtained on request to its secretary.Relationship with other publicationsWhen finished, BS 8468 will be issued in seven parts: Part 1: Positive pressure, self-contained breathing apparatus Specification; Part 2
12、: Negative pressure air purifying devices with full face mask Specification; Part 3: Escape hoods Specification; Part 4: Powered air-purifying respirators Specification; Part 5: Dual-mode apparatus Specification; Part 6: Positive-pressure compressed airline equipment Specification; Part 7: Closed-ci
13、rcuit breathing apparatus Specification.NOTE This standard may be used in conjunction with BS 8467:2006, which gives categorization, requirements and test methods for personal protective ensembles against CBRN agents.Information about this documentRecent changes in international politics have given
14、rise to a threat from weapons previously expected to be confined to military operations. In the event that they are used against civilian targets, emergency and support agencies will need suitable PPE.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) typ
15、e. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purp
16、ort to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2008 1BS 8468-4:20081 ScopeThis standard applies to powered air-purifying respirators (PAPRs) intended to
17、 be used during, rescue, evacuation, escape, hazard containment and decontamination, and similar activities by emergency responders (fire, ambulance, police, and associated civilian agencies and workers) in areas contaminated by chemical, biological, radiological and nuclear (CBRN) agents. It contai
18、ns requirements for designation, classification, testing and marking of the device.2 Normative referencesThe 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
19、referenced document (including any amendments) applies.BS 8467:2006, Protective clothing Personal protective ensembles for use against chemical, biological, radiological and nuclear (CBRN) agents Categorization, performance requirements and test methodsBS EN 132, Respiratory protective devices Defin
20、itions of terms and pictogramsBS EN 134, Respiratory protective devices Nomenclature of componentsBS EN 136:1998, Respiratory protective devices Full face masks Requirements, testing, marking BS EN 140, Respiratory protective devices Half masks and quarter masks Requirements, testing, markingBS EN 1
21、2941:1999+A1:2004, Respiratory protective devices Powered filtering devices incorporating a helmet or a hood Requirements, testing, markingBS EN 12942:1999+A1:2003, Respiratory protective devices Power assisted filtering devices incorporating full face masks Requirements, testing, marking BS EN 1327
22、4-1, Respiratory protective devices Methods of test Part 1: Determination of inward leakage and total inward leakage3 Terms and definitionsFor the purpose of this British Standard the terms and definitions defined in BS EN 132 and BS EN 134 and the following apply.3.1 powered air-purifying respirato
23、rPAPRan air-purifying respiratory protective device that uses an electrically operated blower to force ambient atmosphere through air-purifying elements to the respiratory interface3.2 full face masktight fitting facepiece covering at least the mouth, nose, eyes and chinBS 8468-4:20082 BSI 20083.3 h
24、elmetrigid respiratory interface that could also provide head protection against impact and penetration3.4 hoodrespiratory interface that completely covers the head and neck and may also cover portions of the shoulders and torso 3.5 suitgarment, used as a facepiece which covers the head and entire b
25、ody at least to the ankles and wrists and to which air is supplied 3.6 blousegarment, used as a facepiece which covers the head and upper body at least to the waist and wrists and to which air is supplied 3.7 respiratory interfacepart of an RPD that forms a protective barrier between the wearers res
26、piratory tract and the surrounding atmosphere4DescriptionA powered air-purifying respiratory protective device (PAPR) is a device designed and constructed to use an electrically operated blower to force the ambient atmosphere through air purifying element(s) to the respiratory interface. The air pur
27、ifying elements (filters) shall be combined gas/vapour filters and particle filters. The particle filter shall be integral to and on the influent side of the gas/vapour filter(s).5Designation5.1 Types5.1.1 GeneralTwo types of PAPR are described in this standard:a) Type 1: a device based on a loose f
28、itting hood or helmet as specified in BS EN 12941:1999+A1:2004, including a blouse or suit; and b) Type 2: a device based on a full face mask as specified in BS EN 12942:1999+A1:2003 that is either:1) subtype A for emergency responders that do not need to use optical systems; or2) subtype B for emer
29、gency responders that might need to use optical systems, e.g. microscopes, weapons sights. BSI 2008 3BS 8468-4:20085.1.2 Type 1A Type 1 device typically consists of:a) a respiratory interface, which can be a helmet, hood, blouse, suit, or a device which seals on the face, excluding facepieces specif
30、ied in BS EN 136 or BS EN 140. The respiratory interface may incorporate a helmet, e.g. to provide head protection against mechanical impact and/or a visor to provide eye and face protection against given risks, possibly combined;b) a blower unit and filter(s)1)designed to be carried/worn by the wea
31、rer which supplies filtered ambient air to the respiratory interface. The energy supply for the blower unit may or may not be carried on the person; andc) exhalation valve(s) or other outlets depending on the design by which exhaled air and air in excess of the wearers demand is discharged.5.1.3 Typ
32、e 2A Type 2 device typically consists of:a) for subtype 2A: a full face mask as specified in BS EN 136;b) for subtype 2B: a full face mask as specified in BS EN 136, but with the field of vision requirement specified in BS EN 136:1998 7.21 for full facemasks with two eyepieces and conform to the req
33、uirements of Annex C (use with optical systems);c) a blower unit plus filter(s)1)designed to be carried/worn by the wearer which supplies filtered ambient air to the respiratory interface. The energy supply for the blower unit may or may not be carried on the person; andd) exhalation valve(s) or oth
34、er outlets depending on the design by which exhaled air and air in excess of the wearers demand is discharged.5.2 ClassificationPAPR are classified in this standard in terms of filter breakthrough time as follows:a) Class 15 with filter breakthrough time greater than or equal to 15 min and less than
35、 30 min;b) Class 30 with filter breakthrough time greater than or equal to 30 min and less than 45 min;c) Class 45 with filter breakthrough time greater than or equal to 45 min and less than 60 min;d) Class 60 with filter breakthrough time greater than or equal to 60 min and less than 90 min;e) Clas
36、s 90 with filter breakthrough time greater than or equal to 90 min and less than 120 min; andf) Class 120 with filter breakthrough time greater than or equal to 120 min.Classification for filter breakthrough times greater than 120 min is in 30 min intervals.1)A filter or filters through which all ai
37、r supplied passes.BS 8468-4:20084 BSI 20086 Requirements6.1 GeneralThe complete PAPR configured for use against CBRN agents shall be a powered air device conforming to either:1) BS EN 12941:1999+A1:2004 designation TH3P SL excluding the total mass requirement; or 2) BS EN 12942:1999+A1:2003 designat
38、ion TM3P SL; and 3) in either case conforming to the additional requirements specified in 6.2 and 6.3.In all tests, all test samples shall meet the requirements.6.2 Chemical agent permeation and penetrationFor a Type 2 device or a Type 1 device that can be tested on SMARTMAN (see B.4.4), the PAPR sh
39、all be resistant to chemical agents up to the maximum levels given in Table 1 when tested in accordance with Annex B. Where a Type 1 device cannot be tested on SMARTMAN (see B.4.4):1) devices shall have an inward leakage performance level of 0.2% or better (a nominal protection factor of 500), when
40、tested in accordance with BS 8467:2006 as part of a complete ensemble; and2) the highest cumulative permeation for the exposed materials of the device for each chemical over 4 h shall not exceed 1.25 g/cm2, when tested against all of the liquid test chemicals listed in Annex D of BS 8467:2006. (The
41、liquid concentration density of each chemical is 10 g/m2, applied as nominal 1 l drops, drops applied uniformly over the sample surface. Where a seam closure or fixture is included, at least three drops are applied at each critical juncture, such as the seam edge. The test cell is assembled in the o
42、pen configuration.)NOTE Where components are made of materials identical (in composition and minimum thickness) to those used previously and have been shown to meet the requirements as part of other devices that conform to this standard then this information may be used to demonstrate compliance in
43、this instance.For each type of PAPR (Type 1 or Type 2) tested on SMARTMAN, six devices shall be tested, two devices (one for each agent) in as-received condition and four devices (two for each agent) conditioned in accordance with BS EN 12941:1999+A1:2004 (for Type 1 devices) or BS EN 12942:1999+A1:
44、2003 (for Type 2 devices).Where a Type 1 device cannot be tested on SMARTMAN, three examples of each sample shall be tested for each liquid chemical permeation test. BSI 2008 5BS 8468-4:20086.3 Gas/vapour filters6.3.1 General Filters shall meet the requirements of Table 3.Three filters shall be test
45、ed after mechanical strength testing followed by temperature conditioning according to either BS EN 12941:1999+A1:2004 (Type 1) or BS EN 12942:1999+A1:2003 (Type 2) for each test agent and at each relative humidity level.Testing shall be done as described and at the filter flow rate as determined in
46、 either BS EN 12941:1999+A1:2004 (Type 1) or BS EN 12942:1999+A1:2003 (Type 2) and in accordance with Annex A.6.3.2 CBRN requirements Filter classification, test agents Challenges and breakthrough concentrationsFilters shall be tested against all the test representative agents (TRAs) and under the t
47、est conditions specified in Annex A. Filters shall be classified according to the breakthrough times achieved in the laboratory tests, as given in Table 2.Table 1 Maximum acceptable levels of permeation and penetrationAgent Maximum acceptable peak excursionaMaximum acceptable breakthrough (concentra
48、tion integrated over time)bmg/m3mgmin/m3Distilled sulfur mustard (HD) (vapour) Type 1 and Type 2sequential test before liquid HD0.30 3.0Distilled sulfur mustard (HD) (liquid) Type 1 and Type 2 sequential test after HD vapour0.30 3.0Sarin (GB) (vapour) Type 1 and Type 20.044 1.05a)Three sequential te
49、st data points, with sample times of two minutes, at or above the maximum peak excursion level constitute a failure.b)The maximum acceptable breakthrough is calculated over the six-hour duration of the test.BS 8468-4:20086 BSI 2008The gas/vapour test challenges and breakthrough concentrations shown in Table 3 shall be used to establish the filter breakthrough time and thus classification. The TRAs have been chosen to represent f
