《BS EN 15333-2-2009 呼吸设备 配备的开路脐带式压缩气体驱动装置 自由流动装置.pdf》由会员分享，可在线阅读，更多相关《BS EN 15333-2-2009 呼吸设备 配备的开路脐带式压缩气体驱动装置 自由流动装置.pdf（58页珍藏版）》请在三一文库上搜索。
1、 W - - - - - - - - - - - 7 7 7 - 7 40 to 100 1,0 2,0 Testing shall be done in accordance with 6.2, 6.6.4 and 6.13. 5.9 Safety devices 5.9.1 General All safety devices that give a visual indication shall be capable of being read by a person with normal (or appropriately corrected) visual acuity under
2、 the visibility conditions specified in the information supplied by the manufacturer. Safety devices shall provide an appropriate indication for colour blind people. Testing shall be done in accordance with 6.2 and 6.13. 5.9.2 Pressure indicator Each gas supply shall be fitted with a pressure indica
3、ting system. The apparatus shall be designed and fitted so as to enable the diver, or surface control system operator to take readings without difficulty. Any flexible hose(s) connecting the pressure indicator(s) shall provide protection against damage by external mechanical influences occurring dur
4、ing use. If the connection has a cover, which is not permeable to gases, the space enclosed by this cover shall be vented. The connection point for a pressure indicator hose shall be so constructed that with an upstream pressure of 100 bar it does not permit the passage of more than 100 l min-1 of g
5、as measured at STPD. The display range of a pressure gauge shall extend from zero to a value of 20 % in excess of the rated working pressure of the gas supply system. Scale divisions or increments shall not exceed 10 bar. The range below 50 bar shall be clearly differentiated to emphasise low gas su
6、pply. The accuracy of any indicator shall conform to the following tolerances measured at decreasing pressure: at 50 bar 5 bar; at 100 bar 10 bar; EN 15333-2:2009 (E) 20 at 200 bar 10 bar; at 300 bar 15 bar. Any pressure indicator with an intended maximum indicating pressure of less than 50 bar shal
7、l have an accuracy better than 2 % of full scale. Any submersible pressure indicator shall be waterproof to at least twice the intended maximum diving depth specified by the manufacturer for at least 15 min. The pressure indicator shall be provided with a blow out release which protects the wearer a
8、gainst injuries. The gauge window shall be made of a material being non-splintering when breaking. The safety device of a mechanical pressure gauge shall relieve safely at a pressure not higher than 50 % of the burst pressure of the case. There shall be a marking to show if the indicator is to be us
9、ed with oxygen concentrations greater than air as specified in EN 12021. Testing shall be done in accordance with 6.2, 6.6.1 and 6.13. 5.9.3 Depth indicator (if fitted) The gauge factor for the transformation from pressure to depth shall be such that an increase in pressure of 1 bar would cause an i
10、ncrease in the depth displayed of 10 m. NOTE This rule assumes a water density of 1,0197 kg l-1. If fitted each depth monitor shall have a display in increments of 1 m or less with an accuracy of 0,5 m at depths from 0 to 50 m and 1,0 m at depths greater than 50 m. Testing shall be done in accordanc
11、e with 6.2, 6.6.2 and 6.13. 5.10 Facepiece 5.10.1 General The facepiece shall be either a full face mask or a helmet. An inner mask may be fitted within the facepiece. The facepiece shall enable ear clearing by allowing the divers nasal passages to be occluded. It shall minimise the ingress of water
12、 during normal use and in the event of a diver falling unconscious or having a convulsion. Testing shall be done in accordance with 6.2 and 6.13. 5.10.2 Helmet A helmet and any associated neck dam system or integral fitting to a dry suit with a neck connector shall have a double locking system so th
13、at the diver cannot inadvertently release it underwater by fouling or other incident. It shall be able to be removed by the diver unaided. Testing shall be done in accordance with 6.2 and 6.13. EN 15333-2:2009 (E) 21 5.10.3 Full face mask harness The full face mask harness shall be designed so that
14、the full face mask can be donned and removed easily. It shall be adjustable or self-adjusting and shall hold the facepiece assembly firmly and comfortably in position. Testing shall be done in accordance with 6.2 and 6.13. Each strap of the facepiece shall withstand a tensile force of 150 N applied
15、for 10 s in direction of pulling when the facepiece (excluding mouthpiece) is donned. Buckles and attachment lugs (if fitted) shall withstand the same pull. The permanent linear deformation of each strap shall not be greater than 5 % when tested at a tensile force of 30 N for 10 s. Testing shall be
16、done in accordance with 6.7.2. Once fitted the facepiece shall be easily adjustable by the wearer or self-adjusting. Testing shall be done in accordance with 6.2 and 6.13. 5.10.4 Breathing system connections Connections between a full face mask or a helmet and the system may be achieved by permanent
17、 or special type connections. If a thread connection is used then it shall not be possible to interchange with threads specified in EN 148 (all parts). All connections between the facepiece and the system shall be sufficiently robust to withstand a tensile force of 300 N in the foreseeable direction
18、 of stress. The connection between the facepiece and the suit, where the facepiece is integrated in the suit, shall be sufficiently robust to withstand a tensile force of 800 N in the foreseeable direction of stress. Testing shall be done in accordance with 6.2 and 6.7.1. 5.10.5 Visors Visors shall
19、be attached in a reliable and tight manner to the facepiece and shall have adequate mechanical strength. Testing shall be done in accordance with 6.2, 6.7.3 and 6.13. Visors shall not distort vision in air and under water. Testing shall be done in accordance with 6.13. The field of vision shall meet
20、 the following requirements: The facepiece shall be designed so that the effective field of vision (in air) shall be not less than 40 %, related to the natural field of vision. The overlapped field of vision related to the natural overlapped field of vision shall be not less than 50 %, when equipped
21、 with a single visor and 20 %, when equipped with two or more visors. Testing shall be done in accordance with 6.7.7. The manufacturer shall provide means to reduce misting of the visor. It shall be assured that the vision is not impaired while diving. Testing shall be done in accordance with 6.13.
22、EN 15333-2:2009 (E) 22 Where anti-fogging compounds are used as intended or specified by the manufacturer they shall not cause irritation to eyes or skin or damage the components of the facepiece. Testing shall be done in accordance with 6.2 and 6.13. 5.10.6 Head protection against impact The head p
23、rotection given by the facepiece system shall be classified as either: Class A; Head protection or Class B; Bump protection or Class C; No protection. Class A facepiece systems shall be of sufficient rigidity to act as a head protector in respect of shock absorption and impact resistance according t
24、o EN 397. Testing shall be done in accordance with 6.2 and 6.7.4.2. Class B facepiece systems shall be of sufficient rigidity to act as a head protector in respect of shock absorption and impact resistance according to EN 812. Testing shall be done in accordance with 6.2 and 6.7.4.3. Class C facepie
25、ce systems shall be clearly marked with a warning that no head protection can be assumed when worn. Testing shall be done in accordance with 6.2. 5.11 Harnesses 5.11.1 Body harness The apparatus shall be reliably attached to a body harness which may consist for example of a carrying frame and/or str
26、aps to attach it to the body of the diver. The harness shall not have a single action buckle which releases the entire body harness from the divers body when activated. The body harness shall be so designed that the apparatus remains securely in position. It shall not be possible for the apparatus a
27、nd parts of it to become accidentally detached from the diver. The body harness shall not impair the divers freedom of movement any more than is necessary. It shall be possible to secure loosely suspended parts (e.g. pressure indicator and straps) in position on the apparatus. The fit of the harness
28、 shall be maintained during the use of the apparatus. If adjustment to the harness is possible, for example by adjusting the length of the straps, then it should be possible for this to be achieved easily and at any time. The body harness shall provide a method to securely attach the umbilical to th
29、e diver. Each securing point on the body harness shall withstand a tensile load of 3 500 N for 5 min. Testing shall be done in accordance with 6.2, 6.4.7 and 6.13. EN 15333-2:2009 (E) 23 5.11.2 Lifting harness The apparatus may include a lifting harness for lifting an unconscious diver from the wate
30、r. The lifting harness may be the body harness or a separate system, in any event it shall be possible to easily remove the diving apparatus and auxiliary supply without removal of the lifting harness. If fitted the lifting harness shall provide lifting points on both the front and the back of the d
31、iver. Each lifting harness as a whole including adjustment systems, buckles, etc. shall withstand a tensile force of 9 000 N. Testing shall be done in sequence and in accordance with 6.2, 6.8, 6.9, and 6.13. 5.12 Auxiliary gas supply system (bail out) The apparatus shall allow an auxiliary gas suppl
32、y system (bail out) to be used. The diver shall be able to switch to and breathe from the auxiliary gas supply system (bail out) within 10 s. Testing shall be done in accordance with all relevant tests in Clause 6, and at least 6.2 and 6.13. If an auxiliary gas supply system (bail out) system is use
33、d with the apparatus it shall fulfil the requirements of the appropriate standard. Testing shall be done in accordance with the relevant standard. 5.13 Resistance of the apparatus to temperature 5.13.1 Storage Trouble free operation shall be ensured after storage at temperatures ranging from -30 C t
34、o 70 C. Testing shall be done in accordance with 6.10.2. 5.13.2 Leakage The apparatus shall not leak or release gas when tested at temperatures of -20 C and 50 C. Testing shall be done in accordance with 6.10.1. 5.14 Connectors Components of the whole system shall be easily disassembled for cleaning
35、, testing and examining after conditioning in accordance with 6.9. Demountable connections shall be readily connected and secured, where possible by hand. Any means of sealing used shall be retained in position when the connection is disconnected during normal use and maintenance. Testing shall be d
36、one in accordance with 6.2, 6.9 and 6.13. 5.15 Cleaning and disinfecting All parts that on the recommendation of the manufacturer have to be cleaned and/or disinfected shall be easy to clean, insensitive to the cleaning agents and disinfectants recommended by the manufacturer and remain functional a
37、fter having been cleaned and/or disinfected. NOTE It is recommended to ensure the complete removal of all traces of the detergents which are used during cleaning and disinfecting from respiratory apparatus intended for oxygen/nitrox use (see EN ISO 15001). Testing shall be done in accordance with 6.
38、2, 6.11 and 6.13. EN 15333-2:2009 (E) 24 5.16 Pressure resistance of casings and monitors If casings and monitors are sealed against ambient pressure they shall be waterproof. Testing shall be done in accordance with 6.16 after the temperature resistance test in accordance with 6.10. 5.17 Oxygen com
39、patibility Sub-assemblies that operate at a total pressure above 25 bar and come into contact with a gas with an oxygen content greater than air as specified in EN 12021 shall be oxygen compatible, cleaned and identified as such. Testing shall be done in accordance with 6.2 and 6.12. 5.18 Functional
40、 safety of electrical systems Any electrical, electronic or programmable electronic part of the apparatus shall satisfy the requirements of EN 61508, Part 1 to Part 7. Testing shall be done in accordance with 6.2. 5.19 Voice communications 5.19.1 General If fitted, the apparatus shall include surfac
41、e to diver and diver to surface two way communications. It may also allow diver to diver communications. The diver communications microphone shall be active and the surface microphone Push to talk. NOTE Although the voice communication is not covered by the PPE Directive, it is regarded to be a seri
42、ous safety issue and therefore, if fitted, requirements for it are included in this European Standard. Communications shall achieve a Modified Rhyme Test score greater than 75 %. Testing shall be done in accordance with 6.7.6 and 6.13. 5.19.2 Communication recording The apparatus may have the facili
43、ty for all voice communications to be recorded. The system may either be integral to the surface control system or have an audio out for an external recording device. If fitted an integral device shall be able to record for a minimum of 4 h. Testing shall be done in accordance with 6.2. 5.20 Noise T
44、he measured noise levels at the maximum flow rate and a ventilation of 40 l min-1 shall be compared to the exposure limit value noise dose of L(ep,d)80 dB(A) re 20 Pa or a modified weighting of the sound spectrum taking into consideration the effects of different ambient conditions (gas composition,
45、 pressure, water). Using current occupational health time weighted exposures and the principle of 3 dB halving of noise dose the manufacturer shall state the maximum permissible noise exposure time taking into consideration the time the diver will spend at each RMV and flow rate. In stating the maxi
46、mum permissible noise exposure time, the manufacturer shall give information about appropriate hearing protection for the diver. All recorded noise levels shall be less than the peak sound pressure level (135 dB(C) re 20 Pa). EN 15333-2:2009 (E) 25 Testing shall be done in accordance with 6.7.5. 5.2
47、1 Practical performance The apparatus shall undergo practical performance tests under realistic conditions. These general tests serve the purpose of checking the apparatus for imperfections that cannot be determined by the tests described elsewhere in this European Standard. If during any activity,
48、by any test subject the test subject fails to finalise the selected activity due to the apparatus being not fit for the purpose for which it has been designed, the apparatus shall be deemed to have failed. The test house shall provide full details of those parts of the practical performance tests which revealed these imperfections. Testing shall be done in accordance with 6.13. 6 Testing 6.1 Ge