BS 8468-2:2020
$142.49
Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents – Negative pressure, air purifying devices with full face mask. Specification
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 26 |
This British Standard specifies requirements for negative pressure air purifying devices (APDs) with full face mask intended to 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.
This British Standard contains the requirements for designation, classification, testing and marking of the device.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Classification 4.1 Type 4.2 Class 5 Requirements |
| 9 | 5.1 General 5.2 Preconditioning 5.3 Temperature conditioning of filters 5.4 Visual inspection |
| 10 | 5.5 Inward leakage 5.6 Chemical agent permeation and penetration 5.7 Breathing resistance Table 1 — Breathing resistance 5.8 Flammability |
| 11 | 5.9 Filters |
| 13 | 5.10 Filters – Gas/vapour element Table 2 — Breakthrough times |
| 14 | Table 3 — Filter test challenge and test breakthrough conditions 5.11 Filters – Particulate element 6 Testing 6.1 General |
| 15 | 6.2 Nominal values and tolerances 6.3 Gas capacity tests 6.4 Strength of connections – non-direct filters |
| 16 | Figure 1 — Typical arrangement for testing strength of remote filter hose coupling to mask Figure 2 — Typical arrangement for testing strength of remote filter hose coupling to filter (twin filters in a plenum) |
| 17 | 6.5 Resistance to collapse of breathing hose |
| 18 | Figure 3 — Test arrangement for measurement of resistance to collapse of breathing hose 7 Marking 7.1 General 7.2 System |
| 19 | 7.3 Full face mask 7.4 Filters 7.5 Filter package |
| 20 | Figure 4 — Pictograms 7.6 Breathing hose(s) and couplings, belts and harness 8 Information supplied by the manufacturer |
| 21 | Annex A (normative) Schematic diagrams of droplet placement Figure A.1 — Schematic diagram of HD droplet placement on APD (direct-mounted filter) |
| 22 | Figure A.2 — Schematic diagram of HD droplet placement on APD with drink tube (direct-mounted filter) |
| 23 | Figure A.3 — Schematic diagram of HD droplet placement on APD with communicator (direct-mounted filter) |
| 24 | Figure A.4 — Schematic diagram of HD droplet placement on APD [non-direct-mounted filter(s)] |
| 25 | Bibliography |
