This International Standard specifies self-contained breathing apparatus for firefighters on board ships, which is required under the provisions of Part C (Containment of Fire) of chapter II-2 of the 1974 International Convention of Safety of Life at Sea (74SOLAS), as amended, and chapter 3 of the International Code for Fire Safety Systems (FSS Code).

　

The breathing apparatus manufactured in accordance with this International Standard are intended for use in fighting small to medium magnitude fires before operation of any installed fixed fire-fighting systems. They are not intended or suitable for entry into flames.

　

The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.

　

　

　

　

For the purposes of this International Standard, the following terms and definitions apply.

　

3.1 Eyepiece (Koichi to supply, EN 132)

　

3.2 Faceblank (Koichi to supply, EN 132)

　

3.3 Facepiece (Koichi to supply, EN 132)

　

NOTE Definitions prescribed in EN 132 and EN134 are found useful for this international standard.

　

4.1 In accordance with the chapter 3 of FSS Code, b Breathing apparatus shall be a self-contained compressed air-operated breathing apparatus for which the volume of air contained in the cylinders shall be at least 1200 litres, or other self-contained breathing apparatus which shall be capable of functioning for at least 30 minutes when tested in accordance with 6.1 of ISO 23269-1. , and all cylinders for breathing apparatus shall be interchangeable.

　

4.2 The breathing apparatus shall be of simple and reliable construction and as compact as possible. The design of the breathing apparatus shall be such as to allow its reliable inspection.

　

4.3 The breathing apparatus shall use compressed air.

　

4.3 The breathing apparatus shall be sufficiently robust to withstand the rough usage it is likely to receive in service.

　

4.4 The breathing apparatus shall be designed so that there are no protruding parts likely to be caught on projections in narrow passages.

　

4.5 The finish of any part of the breathing apparatus likely to be in contact with the wearer shall be free from sharp edges or burrs.

　

4.6 The breathing apparatus shall be designed so that the wearer can remove it and, while still wearing the facepiece, continue to breathe from the apparatus.

　

4.7 The breathing apparatus shall be designed to ensure its full function in any orientation.

　

4.8 The main valve(s) of compressed air cylinder(s) shall be arranged so that the wearer can operate it (them) while wearing the breathing apparatus.

　

4.9 The breathing apparatus shall have a suitable warning device that operates when the air remaining in the cylinder reaches predetermined level.

　

4.10 The volume of the air in the fully charged cylinder(s) shall not be less than 1,200 l or equivalent.

　

4.10 The total mass of the breathing apparatus ready for use with facepeice and fully charged compressed air cylinder(s) shall not exceed 18kg.

　

4.11 Air cylinders and their valves shall comply with appropriate national regulations.

　

4.12 The connection between the breathing apparatus and the facepiece may be achieved by a permanent, special or thread type connector. Dismountable connections shall be readily connected and secured, preferably by hand and any means of sealing used shall be retained in position when the connection(s) is (are) disconnected.

　

4.13 Where the facepiece includes a speech diaphragm, the speech diaphragm shall be protected against mechanical damage.

　

4.14 Eyepieces shall be attached in a reliable and gastight manner to the faceblank.

　

4.15 Eyepieces shall not distort vision and shall not mist to the extent to hamper the operation.

　

4.16 Where anti-fog compounds are used, they shall be known not to cause adverse effects to health.

　

4.17 All adjusting devices of the body harness shall be so constructed that once adjusted they will not slip inadvertently.

　

4.18 The apparatus shall be equipped with a reliable pressure gauge which will read the pressure in the cylinder(s) on opening the valve and positioned to enable the pressure to be read conveniently by the wearer. A gauge shall be provided with a suitable safety system to protect the wearer of the apparatus in the event of explosion or fracture of the pressure elements of the gauge. If the window is incorporated in the pressure gauge, it shall be of non-splintering clear material.

　

4.19 The warning device, referred to in clause 4.9 above, shall either be activated automatically when the cylinder valve is opened, or if manually activated it shall not be possible to use the apparatus before the device is activated.

　

4.20 Breathing hoses shall be flexible and non-kinking. The breathing hoses shall permit free head movement and shall not restrict or close off the supply under chin or arm pressure. The hose shall not collapse.

　

4.21 The pressure reducer safety valve shall be designed to pass an air flow at a medium pressure not exceeding 3MPa. When the pressure reducer safety valve opens, the inhalation peak pressure shall be a positive pressure, and the exhalation peak pressure shall be a positive pressure of not more than 2,5 kPa.

　

4.22 The demand valve shall provide positive pressure and shall be fitted with a manual or an automatic change over switch.

　

4.23 The head harness shall be designed so that the full facepiece can be donned and removed easily. The head harness shall be adjustable or self adjusting and shall hold the full facepiece firmly and comfortably in position.

　

4.24 The components of the breathing apparatus supplying compressed air shall be reliably protected against the penetration of particulate matter that may be contained in the compressed air.

　

4.25 It shall not be possible to fit a low pressure tube or hose directly to a high pressure part of the circuit.

　

4.26 All components requiring manipulation by the wearer shall be readily accessible and easily distinguishable from one another by touch. All adjustable parts and controls shall be constructed so that their adjustment is not liable to accidental alteration during use.

　

The following tests shall be conducted in the order given with one sample of the breathing apparatus. After the tests, the apparatus shall not break or develop deformation, corrosion, etc., which may render the breathing apparatus unsuitable for use.

　

The breathing apparatus shall be subjected to a high temperature of 65 ℃ in an atmosphere with relative humidity of 90 % for 48 hours and then left in the environment between 20 ℃ to 25 ℃ with relative humidity of 65 % for 48 hours.

　

The breathing apparatus shall be subjected to a low temperature of -30 ℃ for 8 hours and then to a high temperature of 65 ℃ for 8 hours, the cycle repeated 10 times.

　

The breathing apparatus shall be exposed to 5 % solution of salt-water spray for 8 hours then left for 16 hours. This procedure shall be repeated three times, over 72 hours.

　

After the resonance tests specified in Table 1, the vibration resistance tests specified in Table 1 shall be conducted. After the tests, the sample apparatus shall continue to function properly.