Withdrawn Document Uncontrolled When Printed CE/CESM APPARATUS PART H.5

Transcription

1 CE/CESM CESM - RESPIRATORS APPARATUS AND BREATHING PART H.5

2 ~ BritishRail Withdrawn Document Sheet 1 of 11 This CESM Part supersedes that of MAR 1982 and contains the following Sections: Introduction Definitions Classification of Contaminated Atmospheres Training Respirators Breathing Apparatus Physical Restrictions When Using Respiratory Protective Equipment Maintenance of Respiratory Protective Equipment Further Advice Appendix I - Dust Respirators Appendix II - Gas Respirators Appendix III - Breathing Apparatus INTRODUCTION (a) (b) (d) There are two distinct methods of providing personal protection against contaminated atmospheres by: (i) Purifying the air breathed (ie. RESPIRATORS). (ii) Supplying air from an uncontaminated source (ie. BREATHING APPARATUS). BR Approved Respirators must be worn where there is a risk to health from inhaling harmful dusts, gases, fumes or vapours. (c) BR Approved Breathing Apparatus must be worn where there is a risk to health from inhaling toxic gases or where there is likely to be deficiency of oxygen. 5.2 DEFINITIONS Whilst every effort should be made to remove the contaminant or avoid the need for staff to enter a contaminated atmosphere, situations will arise where the use of suitable Respirators or Breathing Apparatus is essential. Definitions of terms used in this CESM are: (a) Respirator A device in which the surrounding air passes through a filter medium to remove contaminants. (b) Breathing Apparatus - Apparatus enabling its users to breathe independently of the surrounding atmosphere. (c) Canister A container of filter materials which will remove certain contaminants from the air passing through them. 3011/7679k/3

3 Sheet 2 of DEFINITIONS (Contd) (d) Cartridge A small sealed, replaceable container. The usable life of a cartridge is less than that of the corresponding canister. (e) Dust Is taken to include mists and fumes. (f) Gas (g) Facepiece Is taken to include vapours. A mask fitting to the face and covering the nose and mouth. There are two types: the half-mask (ori-nasal) covering the nose and mouth and the full facepiece covering the eyes, nose and mouth. (h) Filter A device to remove specific contaminants. (i) Pre-filter - A filter fitted in front of the main filter to remove coarse dust. 5.3 CLASSIFICATION OF CONTAMINATED ATMOSPHERES Contaminated atmospheres are classified as follows: (a) Nuisance atmospheres - which are not toxic or immediately dangerous to health. (b) Hazardous atmospheres - which may be of low toxicity or cause easily reversible biological changes. (c) Dangerous atmospheres - of a high toxicity or where the health hazards are more severe. (d) Atmospheres that are immediately dangerous to life. 5.4 TRAINING (a) For safe use of Respirators or Breathing Apparatus, the person in charge and the user must be trained in its limitations, use and maintenance. (b) Training will consist of: (i) instruction in the nature of the hazard and an appreciation of what might happen if the equipment is not used; (ii) instruction as to why the particular equipment is appropriate to the hazard; (iii) an explanation of the capabilities and limitations of the equipment; (iv) practical instruction and training in the use of the equipment. 3011/7679k/4

4 Sheet 3 of RESPIRATORS (a) Respirators MUST NOT be used in an oxygen deficient atmo-sphere or in atmospheres immediately dangerous to life. (b) Dust Respirators provide protection against DUST within certain specified limits only (see Appendix I for Types of Dust Respirators). (c) Respirators for GASES (with or without dust) provide protection against specific gases (see Appendix II for Types of Gas Respirators). 5.6 BREATHING APPARATUS (a) Breathing Apparatus provides protection against oxygen deficiency and toxic atmospheres within specified limits. (See Appendix III for Types of Breathing Apparatus). (b) (c) Self contained Breathing Apparatus are used in special situations only due to the stringent requirements of training, maintenance and records. Where compressors are used to provide breathable quality air, they must be tested and certified in accordance with Plant Instructions. PHYSICAL RESTRICTIONS WHEN USING RESPIRATORY PROTECTIVE EQUIPMENT (a) All facepieces will restrict vision to some degree and staff should take special care to avoid the hazards of slips, trips, falls and being struck by moving vehicles, etc. (b) Speech communication may be impeded and this factor must be taken into account when planning safe systems of work. I (c) Facepiece fit is usually the most important factor in obtaining proper protection with a respirator, particularly of the half-mask type. Beards and facial hair are likely to affect the fit. A satisfactory fit of a full facepiece cannot be expected when spectacles are worn unless they are specially made for this purpose. 5.8 MAINTENANCE OF RESPIRATORY PROTECTIVE EQUIPMENT (a) InsPec tion (i) Each RESPIRATOR must be inspected for correct functioning before use daily and examined at intervals not exceeding three months by a person who has been trained in these duties. (ii) Each item of BREATHING APPARATUS must be inspected for correct functioning before and after daily use. All equipment available for use must have been thoroughly examined within the previous four weeks by a person who has been trained in these duties. 3011/7679k/5

5 MonthIYear JAN 1992 Sheet 4 of MAINTENANCE OF RESPIRATORY PROTECTIVE EQUIPMENT (Contd) (b) Records Each Respirator (except those of a disposable kind) and item of Breathing Apparatus must be given a distinguishing mark, and a record maintained. The address of the issuing/maintaining depot, shall be kept, showing the following particulars: (i) Whether the item is a Respirator or Breathing Apparatus. (ii) The distinguishing mark and sufficient description to identify the item and the name of the manufacturer. (iii) The date of examination and by whom it was carried out. (iv) The condition of the equipment and particulars of any defect found at the examination. (v) In the case of compressed air equipment, the supply cylinder pressure. (c) Cleanins and Decontamination (i) Respirators and Breathing Apparatus should be cleaned and decontaminated as necessary to ensure that proper protection is provided for the user. Facepieces must be cleaned and checked daily by the user. (ii) Cleaning should be by washing and rinsing with soap and warm water. The equipment should be dried away from direct sunlight. When facepieces are not issued on a personal basis, they must always be thoroughly cleaned and checked before being worn by another User. (d) Servicinq No attempt should be made to make adjustments or repairs beyond the Manufacturer's recommendations. After inspection, cleaning and any necessary repair, Respirators and Breathing Apparatus should be protected against dirt, oil, sunlight, extreme heat and cold, excessive moisture, harmful chemicals and distortion. 5.9 FURTHER ADVICE may be obtained through normal managerial channels, from Safety Engineers and/or Scientific Services. Signatures removed from electronic version J 'S CORNELL (CEC Min. 91/155 and DoCE letter 12 August 1991 DIRECTOR OF CIVIL ENGINEERING principles apply)

6 Sheet 5 of APPENDIX I: DUST RESPIRATORS (a) Twes of Dust Respirators (i) Disp osable Dust Respirators (BS 6016) These are entirely or substantially constructed of filter material. (ii) Half-Mask Dust ResD irators (BS 2091) normally consist of a half-mask and replaceable dust filter(s). (iii) Positive Pressure Powered Dust Respirators (BS 4558) Consist of a half-mask or full facepiece or blouse or full suit supplied with standard or high efficiency filtered air from a power pack. (iv) Hiuh Efficiency Dust ResD irators (BS 4555) Consist of a full facepiece with one or more replaceable high efficiency cartridges or canisters. (b) BR ADDrOVed Dust Respirators BR Cat. NQ. Avvlication (i) DisDo sable Dust ResR irators BS 6016: Type 1: 871O by 3M UK PLC Nuisance andlor 44/ Nuisance and/or hazardous dusts eg. ballast, cement, glass fibre BS 6016: Type 2: 8800 by 3M UK PLC 44/ For heavy 2365 by MOLDEX-METRIC 44/ physical work eg. track ballasting 3011/7679k/7

7 PART H.5 - RESPIRATORS AND BREATHING APPARATuS Sheet 6 of 11 I5.10 APPENDIX I: DUST RESPIRATORS (b) BR Armroved Dust Respirators (Contd) (ii) Half-Mask Dust Respirators BR Cat. No. ADD~ication Filtasafe-2, complete with one with FC1 cartridge by Siebe German & Co Ltd FC1 Cartridges (10 No. Pack) 1, 91 (25 No. Pack) Pre-filter Discs (25 No. Pack) Pre-filter Pads (144 No. Pack) 44/ Nuisance and/or hazardous dusts 44/ eg. ballast, 44/ low 44/ concentrations 44/ of lead or asbestos - moderate physical work - Filtasafe-2 complete with two FC2 cartridges by Siebe German & Co Ltd FC2 Cartridges (10 No. Pack),, II (25 No. Pack) Pre-Filter Discs (25 No. Pack) #s #l Pads (144 No. Pack) 44/ / / / / Moderate physical work - Enterprise by Siebe German & Co Ltd (10 No. Pack) 44/ Heavy physical work Filters (pack of 400) in easy to use dispensers of 25 44/ TvPe X, half-mask including pneunatic face seal and filter Type B by Martindale Protection Ltd Type B filters (9 No. Pack) Pre-filters (100 No. Pack) - Twinair model TW 804 (small facepiece) or TW 807 (large facepiece) half mask complete with twin non-kinking breathing tubes, waist belt and back pack cartridge holder with R 214 cartridge and pre-filter R 817 by Chapman & Smith Ltd Filter cartridges R 214 (12 No. Pack) Pre-filter pads R 817 (100 No. Pack) 44/ / / / / / / Special (e.g. Asbestos) For use in conjunction with face shields or visors 3011/7679k/8

8 PART H.5 - RESPIRATORS AND BREATHING APPARATuS Sheet 7 of 11 I 5.10 APPENDIX I: DUST RESPIRATORS (b) BR Approved Dust ResDirators (Contd) (iii) Positive Pressure Powered Dust Respirators Mk V complete with waist assembly and half-mask. by Martindale Protection Ltd For Mk V : Battery Charger- (State either 130 or 250 V Filters - High Efficiency (9 No. Pack) Pre-filters (100 No. Pack) BR Cat. No. 44/ / / / Application Hazardous and/ or dangerous dusts, e.g. moderate concentrations of lead or asbestos - special (iv) Hiah Efficiency Dust Respirators High efficiency dust respirator facepiece by Mine Safety Applications Ltd Cartridges (5 No. Pack) 44/ / Dangerous dusts - special 3011/7679k/9

9 Sheet 8 of 11 I v 5.11 APPENDIX 11: GAS RESPIRATORS (a) Types of Gas Respirators (i) Cartridqe Tme ResPirato rs (BS 2091) Consist of a full facepiece or half-mask, connected to a replaceable cartridge(s). (ii) Canister Tv~e Respirators (BS 2091) Consist of a full facepiece connected to a replaceable canister. a It is essential that the canister or cartridge is appropriate to the particular hazard. If in doubt a Safety Engineer should be consulted or the advice of Scientific Services sought. (b) BR A?mroved Gas Res~iratorS BR Cat. No. Application (i) Cartridqe tme respirators for Gases Hazardous gases, special =: For respirators and cartridges appropriate to the particular e.g. paint hazards seek the advice of spraying - Scientific Services Gasfoe half-mask by 44/ Light Mine Safety Appliances Ltd physical work Filtasafe 2 (for single cartridge) Light/moderate half-mask, without physical work cartridge by Siebe German Ltd 44/ These must be used with an approved cartridge (see 5.11(c)) Filtasafe 2 (for twin cartridge) Moderate half-mask, without cartridge physical work by Siebe German Ltd 44/ These must be used with an approved cartridge (see 5.11(c)) 3011/7679k/10

10 Sheet 9 of APPENDIX II: GAS RESPIRATORS (b) BR Armroved Gas ResDirators (Contd ) BR Cat. No. Avvlication (ii) Canister TvDe ReSD irators for Gases NOTE: For respirators and canisters appropriate to the particular hazards, seek the advice of Scientific Services. Puretha complete with - Hazardous Vistarama full facepiece, large front gases - harness without canister by special Siebe German Ltd 44/ I I (c) Avrmoved Cartridue For Siebe German Filtasafe Respirators (44/ and ) FC6 Organic vapour and dust 44/ /7679k/11

11 Sheet 10 of APPENDIX III: BREATHING APPARATUS (a) Tvpes of Breathina Armaratus The following forms of breathing apparatus are available: (i) Fresh Air Hose Apparatus With Blower (BS 4667: Part 3) Consists of a full facepiece or half-mask connected to a plain hose, but includes a hand or motor operated blower. The hose length should not exceed 36 metres. (ii) Compressed Air Line Armaratus (BS 4667: Part 3) Consists of a full facepiece of half-mask, flexible hose, filters and a source of breathable quality compressed air. The length of flexible hose should not exceed 90 metres. There are three types of compressed air line apparatus, namely: - Positive pressure demand. - Demand. - Non constant flow. (iii) Self Contained Breathinu AvParatus Closed circuit type (BS 4667: Part 1). Open circuit type (BS 4667: Part 2). Escape (BS 4667: Part 4). (b) BR Approved Breathina Armaratus BR Cat. No. Application Fresh air hose breathing apparatus with blower (i) Pneumatic turbine by Martindale Protection Ltd with half mask 44/ Hazardous and/ or dangerous atmospheres, e.g. high concentrations of lead or welding fume or asbestos - special Electric turbine compressor 44/ /120 volts by Martindale Protection Ltd 3011/7679k/12

12 CIVIL ENGINEERING SAFETY mu Sheet 11 of 11 I5.12 APPENDIX III: BREATHING APPARATUS (b) BR Armrov ed Breathinu Atma ratus Accessories for Pneumatic and Electric Turbines Belt harness and bracket (RA-17701/1) 10 metre corrugated hose (RA-17715I1O 20 metre corrugated hose (RA-17715/20) 30 metre corrugated hose (RA-17715/30) 40 metre corrugated hose (RA-17715/40) Double air tube facepiece (half-mask) (PR-17560) Half-mask assembly (PR-17561/A) (Contd) BR Cat. No. 44/1! / / / / / / Armlication (ii) Compressed air line breathing 44/15170 apparatus (dependent on supply of breatheable quality compressed air) Constant flow type Vistarama full facepiece, for 80 to 100 psi supply, by Siebe German Ltd (iii)~elf Contained Breathinu Apparatus ESCAPE TYPE: Chest bag Mk2 escape 400 litre by Draeger Safety Ltd Dangerous and potentially lethal atmospheres Special Special Special e.g. confined spaces 3011/7679k/13