BS 8468-6.2:2020 pdf download – Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents Part 6.2: Constant flow compressed air line equipment — Specification 3.1chemical agent toxic chemical that can be disseminated to cause harm NOTE Chemical agents include chemical warfare agents and toxic industrial chemicals. 3.2biological agent microorganism that is a pathogen and that has the potential to be used intentionally to cause harmNOTEHuman pathogens are relevant to RPD selection. 3.3radiological agent substance that emits ionizing radiation and that could be disseminated to cause harm 3.4nuclear agent radioactive matter resulting from a nuclear explosion or accidental release from a nuclear facility 3.5decontamination physical and/or chemical process of removing as much contamination as possible from peopleor equipment 4 Requirements4.1General NOTE Compressed air line breathing apparatus with constant flow may be used with a full face mask, hood,helmet or suit (the apparatus). The apparatus shall be constant flow equipment meeting type CBRN1 or type CBRN3 in accordancewith BS 8468-8. lf the facepiece is a full face mask, it shall conform to BS EN 136:1998,class 2 or class 3. Type CBRN1 devices shall conform to BS EN 14594:2018, class 4A or class 4B; or shall conform toBSEN 1073-1:2016+A1, class 1-5. Type CBRN3 devices shall either conform to BSEN 14594:2018,class 4A or class 4B, and the lowerinward leakage specified in 4.4; or shall conform to BSEN 1073-1:2016+A1, class 3,4 or 5. The apparatus shall also conform to the chemical agent permeation and penetration resistancespecified in 4.5, according to CBRN type. 4.2Preconditioning Type CBRN1 samples shall be preconditioned in accordance with BS EN 14594 or BSEN 1073-1 priorto visual inspection (see 4.3) and testing for chemical agent permeation and penetration (see 4.4 and4.5, respectively ) where required. Type CBRN3 samples shall be preconditioned in accordance with BSEN 137 prior to visual inspection(see 4.3) and testing for inward leakage and chemical agent permeation and penetration (see 4.4 and4.5, respectively ) where required. 4.3Visual inspection Where visual inspection is required, it shall be in accordance with BS 8468-8:2020,Clause 6.A minimum of two samples shall be inspected. 4.4 Inward leakage CBRN1 devices shall have an inward leakage of <0.1% when tested as a complete system inaccordance with BS EN 13274-1:2001,8.4c) with 10 test subjects. CBRN3 devices shall have an inward leakage of <0.01% when tested as a complete system inaccordance with BS EN 13274-1:2001,8.4c) with 10 test subjects. NOTE This requirement for CBRN3...
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