BS-8467:2006 pdf download

BS-8467:2006 pdf download.Protective clothing-Personal protective
ensembles for use againstchemical, biological, radiological and nuclear(CBRN) agents -Categorization,performance requirements and test methods.
This category has been sub-divided to enable ensembles to be defined for use in a range of environments. Garments conforming to sub-category B 1 are intended for use in environments with high levels of vapour challenge, but a breathable level of oxygen. Garments conforming to category B2 are intended for use in environments with mainly liquid challenge and a breathable level of oxygen.
Typical application: Environments where eposure to potentially high levels Qf a known agent is likelj. This would be prnnarily in the form qf indirect contamznatwn, for example contamination on personnel, or equipment. Moderate-to-high levels qfp1itjsical activity might be anticipated. They are not expected to be proqf against immersion.
Category C: An ensemble providing protection against low levels of known CBRN agents where airborne exposure is assessed to be not harmful by skin contact but might be harmful by ocular or respiratory exposure.
Typical application: En:vi’ron,ments ‘where exposure to low levels qf known agent is likely lmt where tIie risk from vapour contact to the skin is deemed acceptable. High levels qf rugged physical activity might be anticipated such as durzng ‘urban search and rescue.
Category D: An ensemble providing protection against a very low level of known CBRN agent in circumstances where personal contamination is unlikely.
Typical application: Environments involving very low risk Qf physical swface contamination. Ensembles will generally be used at large distance from any agent ‘release and/or some considerable time after any such. release, such asfor outer cordon control..
5 General ensemble requirements, excluding CBRN aspects
5.1 General
Ensembles shall fulfil the requirements of one or more of 5.2, 5.3, 5.4, or 5.5 when combined with the additional respiratory protective device(s) as specified in the manufacturer’s instructions.
c) the requirement for safety footwear in 5.3 of BS 8428:2004 shall be amended to: “Permanently fitted or detachable safety footweat; rncludmg external bootees shall conform to BS EN ISO 20345”;
NOTE 6 Particular applications might require (KiditiOfl(Li levels of
protection.
d) the requirement for visors in 5.4 of BS 8428:2004 shall not be made for additional sarin, mustard and VX challenge;
e) the head protection requirement (e.g. a fire helmet inside the suit) in 7.1 of BS 8428:2004 shall not be made;
fl all breathing apparatus requirements in 7.1 of BS 8428:2004 shall not be made;
g) the requirement that the suit shall be without pockets or similar in 7.1 of BS 8428:2004 shall not be made; and
h) if bootees or separate boots are supplied then a system for preventing ingress of liquid into the outer footwear shall be provided, e.g. overlapping flaps (also known as “outer legs”).
Ensembles shall also be deemed to fail if:
i) a subject finds it impossible to don an ensemble fitted for them;
j) the ensemble will not stay closed or a constituent item will not stay in place;
k) the ensemble or a constituent item compromises a vital function such as breathing;
1) simple tasks that the wearer would expect to be able to perform are impossible;
m) a subject refuses to continue the assessment due to pain induced by wearing the ensemble; or
n) wearing the ensemble prevents the wearing of other essential PPE.
5.3.1.2 Respiratory protection
Respiratory equipment shall protect the respiratory tract of the user of the ensemble. This requirement shall be met by using:
a) any respiratory devices that meet the requirements of Category A;
b) negative-pressure air-purifying devices (APDs) suitable for CBRN protection4); or
c) powered air-purifying respirators suitable for CBRN protection5). All requirements of the respiratory equipment shall be shown to not be compromised by incorporation of the equipment into the ensemble.
5.3.2 Subcategory Bi
Ensembles and materials shall conform to the following requirements:
a) resistance to penetration by liquids in 7.3 of BS 8428:2004, amended to “Three ensembles shall be prepared in accordance
4) A specification for negative-pressure APDs is in preparation and will be published as BS 8468-2.
5) A specification for powered air-purifying respirators is in preparation and will be published as BS 8468-4.