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What the Standards mean … Protection Factors for Common RPE Types Standard Description / Application Class or Filter Nominal PF Assigned PF EN149 Filtering face piece for particulates. These devices are substantially constructed from the filter media itself and should be disposed of after each shift. There are three protection classes and the devices only cover the nose, mouth and chin. FFP1 FFP2 FFP3 4 12.5 50 4 10 20 EN405 Disposable half mask respirators which incorporate a gas filtering element as well as a particulate filtering element. They cover the nose, mouth and chin. These devices are reusable to a degree but the filter elements are not replaceable. If it is decided to use the respirators for more than 28 days, they become subject to examination and record keeping under Reg 9 of COSHH. FFGASxP1 FFGASxP2 FFGASxP3 4 12.5 50 4 10 10 EN140 Half masks which cover the nose, mouth and chin. The face mask is generally manufactured from a flexible rubber or silicone. The mask can be fitted with a range of replaceable filters for both particulate and gas/vapour. P1 P2 P3 GAS GAS+P3 4 12.5 50 50 — 4 10 20 10 10 EN136 Full face masks that cover the whole face. They are manufactured in a flexible rubber or silicone and are fitted with a transparent visor. The mask can be fitted with particulate and gas filters. P2 P3 GAS GAS+P3 17 1000 2000 — 10 40 20 20 EN12941 This is the latest standard for powered filtering devices incorporating a helmet or a hood. Includes provision for protection against particulates and gases/ vapours. There are three protection classes. For their protection the devices rely on a constant flow of filtered air provided by a battery powered fan. TH1 TH2 TH3 10 50 500 10 20 40 EN12942 This is the latest standard for power assisted filtering devices incorporating full face masks, half masks or quarter masks. Includes provision for protection against both particulates and gases/vapours. There are three protection classes. These devices may include half masks or full face masks. They are termed as power assisted since they will offer protection equivalent to a standard negative pressure respirator if the power fails. TM1 TM2 TM3 20 200 2000 10 20 40 EN146 This is the original standard for powered hoods and helmets for protection against particulates only. Two levels of protection are available. This standard is now superseded by EN12941. THP1 THP2 10 20 5 10 EN1835 Light duty construction compressed airline breathing apparatus incorporating a helmet or a hood, commonly used in factories and for spraying applications. Three levels of protection are available. The maximum length of airline permitted is 10 metres. LDH1 LDH2 LDH3 10 50 100 10 20 40 EN139 Compressed airline breathing apparatus incorporating a full or half mask. These products operate on a constant flow or positive pressure demand valve. They are generally regarded as high protection devices when fitted to full face masks. A full face mask when fitted with a positive pressure demand valve is recommended for use in confined space working. (a) c/w half mask (b) c/w full face mask I.) constant flow II.) positive pressure demand 50 2000 2000 20 100 2000 EN143 Particulate filters EN147 Powered – Full Face Masks EN270 Compressed airline breathing apparatus with hood 200 n/a 40 200 EN371 Gas and/or combined filters for use against low boiling organic compounds EN402 Escape Apparatus. SCBA with full face mask or mouthpiece assembly EN529 Respiratory selection, use and care EN1146 Compressed air escape apparatus with hood EN14387 Gas & vapour filters EN137 Self contained open circuit breathing apparatus which is positive pressure on demand. Air is contained in one or more cylinders and supplied by a high pressure regulator and demand valve to the wearer’s mask. These devices are designed for use in the most hazardous environments and are generally used for firefighting and other high risk respiratory environments. positive pressure demand 2000 2000 EN138 Fresh air breathing apparatus often referred to as FABA. A basic piece of equipment used for work where there is fresh air close at hand and normally the wearer would have to breath against the resistance of the hose. Commonly used in small trenches by maintenance personnel. 40 48 20002000

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