BS 8468-4:2008
$142.49
Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents – Powered air-purifying respirators. Specification
| Published By | Publication Date | Number of Pages |
| BSI | 2008 | 28 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Contents 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Description 2 5 Designation 2 6 Requirements 4 7 Marking 7 8 Information supplied by the manufacturer 8 Annexes Annex A (normative) Testing 9 Annex B (normative) Test method for chemical agent permeation and penetration resistance against distilled sulfur mustard (HD) and sarin (GB) 9 Annex C (normative) Use of optical systems external to the full facemask 21 Annex D (normative) Relationship between this British Standard and the Basic Safety Requirements of EU Directive 89/686/EEC Personal Protective Equipment 21 Bibliography 23 List of figures Figure 1 – Pictograms 8 Figure B.1 – Schematic diagram of HD droplet placement on PAPR (face-mounted blower/filter(s) unit) 13 Figure B.2 – Schematic diagram of HD droplet placement on PAPR with drink tube (face-mounted blower/filter(s) unit) 14 Figure B.3 – Schematic diagram of HD droplet placement on PAPR with communicator (face-mounted blower/filter(s) unit) 15 Figure B.4 – Schematic diagram of HD droplet placement on PAPR (belt-mounted blower/filter(s) unit) facepiece with side hose connection 16 Figure B.5 – Schematic diagram of HD droplet placement on PAPR [belt-mounted blower/filter(s) unit] facepiece with central hose connection 17 Figure B.6 – Schematic diagram of HD droplet placement on PAPR hood (including inner mask) and belt-mounted blower/filter(s) unit 18 Figure B.7 – Schematic diagram of HD droplet placement on PAPR hood (without an inner face mask) and belt-mounted blower/filter(s) unit 19 List of tables Table 1 – Maximum acceptable levels of permeation and penetration 5 Table 2 – Breakthrough times 6 Table 3 – Filter test challenge and test breakthrough concentrations 6 Table B.1 – Airflow characteristics for chemical agent permeation and penetration resistance test method (HD vapour) 12 Table B.2 – Airflow characteristics for chemical agent permeation and penetration resistance test method (GB vapour) 20 Table D.1 – Basic Safety requirements for PPE – Comparison between the PPE Directive, Annex II and BS 8468-4 21 |
| 4 | Foreword |
| 5 | 1 Scope 2 Normative references 3 Terms and definitions 3.1 powered air-purifying respirator PAPR 3.2 full face mask |
| 6 | 3.3 helmet 3.4 hood 3.5 suit 3.6 blouse 3.7 respiratory interface 4 Description 5 Designation 5.1 Types 5.1.1 General a) Type 1: a device based on a loose fitting 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: 2) subtype B for emergency responders that might need to use optical systems, e.g. microscopes, weapons sights. |
| 7 | 5.1.2 Type 1 a) a respiratory interface, which can be a helmet, hood, blouse, suit, or a device which seals on the face, excluding facepieces… b) a blower unit and filter(s) 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; and c) exhalation valve(s) or other outlets depending on the design by which exhaled air and air in excess of the wearer’s demand is discharged. 5.1.3 Type 2 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 requirements 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; and d) exhalation valve(s) or other outlets depending on the design by which exhaled air and air in excess of the wearer’s demand is discharged. 5.2 Classification a) Class 15 – with filter breakthrough time greater than or equal to 15 min and less than 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) Class 90 – with filter breakthrough time greater than or equal to 90 min and less than 120 min; and f) Class 120 – with filter breakthrough time greater than or equal to 120 min. |
| 8 | 6 Requirements 6.1 General 2) BS EN 12942:1999+A1:2003 designation TM3P SL; and 3) in either case conforming to the additional requirements specified in 6.2 and 6.3. 6.2 Chemical agent permeation and penetration 2) the highest cumulative permeation for the exposed materials of the device for each chemical over 4 h shall not exceed 1.25 mg… |
| 9 | Table 1 Maximum acceptable levels of permeation and penetration 6.3 Gas/vapour filters 6.3.1 General 6.3.2 CBRN requirements – Filter classification, test agents – Challenges and breakthrough concentrations |
| 10 | Table 2 Breakthrough times Table 3 Filter test challenge and test breakthrough concentrations 6.4 Mass supported by head and neck |
| 11 | 7 Marking 7.1 General 7.2 Device 7.3 Filters a) filter class, device class and colour code, that is combined filters shall be colour coded orange/white; e.g. Class 15 TH3P SL, colour coded orange/white. b) a mark or symbol showing if the filter is for a multiple filter device; c) the sentence: “For single use only.”; d) the designation and year of this standard, i.e. BS 8468-4:2008; e) the year and month of end of shelf life; the end of shelf life may be informed by a pictogram as shown in Figure 1 where the code “yyyy/mm“ indicates the year and month; f) the manufacturer, supplier or importer shall be identified by name, trademark, or other means of identification; g) the sentence: “See information supplied by the manufacturer.” at least in the official language(s) of the country of destination, or the appropriate pictogram as shown in Figure 1; and h) the manufacturer’s model designation. |
| 12 | Figure 1 Pictograms 7.4 Packaging a) the manufacturer’s recommended conditions of storage (at least the temperature and humidity) or the appropriate pictogram (see Figure 1); b) the sentence “See information supplied by the manufacturer” in the official language(s) of the country of destination, or the appropriate pictogram (see Figure 1); c) an indication of the contents; d) the year and month of end of shelf life; the end of shelf life may be informed by a pictogram as shown in Figure 1 where the code “yyyy/mm” indicates the year and month. 8 Information supplied by the manufacturer |
| 13 | Annex A (normative) Testing A.1 General A.2 Nominal values and tolerances A.3 Visual inspection A.4 Gas filter test conditions Annex B (normative) Test method for chemical agent permeation and penetration resistance against distilled sulfur mustard (HD) and sarin (GB) B.1 Principle |
| 14 | B.2 Materials B.3 Apparatus |
| 15 | B.4 Preparation B.5 Procedure B.5.1 Set-up common to all test agents |
| 16 | B.5.2 HD vapour – Type 1 and Type 2 PAPRs Table B.1 Airflow characteristics for chemical agent permeation and penetration resistance test method (HD vapour) B.5.3 HD liquid – Type 1 and Type 2 PAPRs |
| 17 | Figure B.1 Schematic diagram of HD droplet placement on PAPR (face-mounted blower/filter(s) unit) |
| 18 | Figure B.2 Schematic diagram of HD droplet placement on PAPR with drink tube (face-mounted blower/filter(s) unit) |
| 19 | Figure B.3 Schematic diagram of HD droplet placement on PAPR with communicator (face-mounted blower/filter(s) unit) |
| 20 | Figure B.4 Schematic diagram of HD droplet placement on PAPR (belt-mounted blower/filter(s) unit) facepiece with side hose connection |
| 21 | Figure B.5 Schematic diagram of HD droplet placement on PAPR [belt-mounted blower/filter(s) unit] facepiece with central hose connection |
| 22 | Figure B.6 Schematic diagram of HD droplet placement on PAPR hood (including inner mask) and belt-mounted blower/filter(s) unit |
| 23 | Figure B.7 Schematic diagram of HD droplet placement on PAPR hood (without an inner face mask) and belt-mounted blower/filter(s) unit B.5.4 GB vapour – Type 1 and Type 2 PAPRs |
| 24 | Table B.2 Airflow characteristics for chemical agent permeation and penetration resistance test method (GB vapour) B.5.5 Termination procedure B.6 Test report a) the laboratory’s name and date of test; reference to the appropriate standard manufacturers name and model number of the PAPR; b) agents used, and for each agent: 2) the three highest consecutive peak excursions in mg/m3; c) a digital photograph of the PAPR tested with droplet positions marked. |
| 25 | Annex C (normative) Use of optical systems external to the full facemask Annex D (normative) Relationship between this British Standard and the Basic Safety Requirements of EU Directive 89/686/EEC Personal Protective Equipment Table D.1 Basic Safety requirements for PPE – Comparison between the PPE Directive, Annex II and BS 8468-4 |
| 27 | Bibliography [1] National Institute for Occupational Safety and Health. NIOSH Procedure No. RCT-CBRN-STP-0550. (www.cdc.gov/niosh/npptl/stps/respirator_testing.htm) [2] National Institute for Occupational Safety and Health. NIOSH Procedure No. RCT-CBRN-STP-0551. (www.cdc.gov/niosh/npptl/stps/respirator_testing.htm) [3] EUROPEAN COMMUNITIES. 89/686/EEC. Council directive on the approximation of the laws of the Member States relating to personal protective equipment. Luxembourg: Office for Official Publications of the European Communities, 1989. [4] GREAT BRITAIN The Personal Protective Equipment Regulations 2002: Statutory Instrument 2002/1144. The Stationery Office. (http:www.tsoshop.co.uk) |
