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GB/T 38228-2019

Chinese Standard: 'GB/T 38228-2019'
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GB/T 38228-2019English399 Add to Cart Days<=4 Respiratory protection -- Self-contained closed-circuit oxygen breathing apparatus for escape Valid GB/T 38228-2019
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BASIC DATA
Standard ID GB/T 38228-2019 (GB/T38228-2019)
Description (Translated English) Respiratory protection--Self-contained closed-circuit oxygen breathing apparatus for escape
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard C73
Classification of International Standard 13.340.30
Word Count Estimation 22,273
Date of Issue 2019-10-18
Date of Implementation 2020-05-01
Drafting Organization Institute of Chemical Defense, Academy of Military Sciences, China Academy of Safety Production Science, Honeywell Safety Equipment (Shanghai) Co., Ltd., Dr?ger Safety Equipment (China) Co., Ltd., Army Aviation Academy
Administrative Organization National Personal Protective Equipment Standardization Technical Committee (SAC/TC 112)
Proposing organization People's Republic of China Emergency Management Department
Issuing agency(ies) State Administration of Markets and China National Standardization Administration

GB/T 38228-2019
Respiratory protection--Self-contained closed-circuit oxygen breathing apparatus for escape
ICS 13.340.30
C73
National Standards of People's Republic of China
Respiratory protective self-contained closed-circuit oxygen escape respirator
Published on October 18,.2019
2020-05-01 implementation
State Administration of Market Supervision
Published by China National Standardization Administration
Contents
Foreword III
1 range 1
2 Normative references 1
3 Terms and definitions 1
4 Classification, grading and marking 2
5 Technical requirements 2
6 Test method 8
7 Identification and packaging 15
References 17
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Ministry of Emergency Management of the People's Republic of China.
This standard is under the jurisdiction of the National Personal Protective Equipment Standardization Technical Committee (SAC/TC112).
This standard was drafted. Institute of Chemical Defense, Academy of Military Sciences, China Academy of Safety Science and Technology, Honeywell Safety Protection Equipment (on
Haihai Co., Ltd., Dräger Safety Equipment (China) Co., Ltd., Army Aviation Academy.
The main drafters of this standard. Yang Xiaobing, Yang Bo, Zhang Mingming, Liu Xiang, Guo Jianshu, Liang Guojie, Zhang Shouzheng, Zhang Shouxin, Zhang Chongjie, Yang Dongxing,
Ding Songtao, Li Zuohua, Gao Ningjun.
Respiratory protective self-contained closed-circuit oxygen escape respirator
1 Scope
This standard specifies the classification, classification, technical requirements, test methods, self-sufficient closed-circuit oxygen breathing apparatus for escape (hereinafter referred to as breathing apparatus),
Identification and packaging.
This standard applies to workplaces, public places for escape (including hazardous accident escape) breathing apparatus.
This standard does not apply to breathing apparatus for diving operations.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2410-2008 Determination of light transmittance and haze of transparent plastics
GB 2626-2006 Respiratory protective equipment
GB 2890-2009 Respiratory self-priming filter gas mask
GB 3836.1-2010 Explosive environment Part 1. General requirements for equipment
GB/T 5099-1994 steel seamless gas cylinder
GB/T 8982-2009 oxygen for medical and aviation breathing
GB/T 12903-2008 Terms for personal protective equipment
GB/T 18664-2002 Selection, use and maintenance of respiratory protective equipment
GB 23394-2009 self-contained closed-circuit compressed oxygen respirator
GB/T 23465-2009 Practical performance evaluation of respiratory protective equipment
GB 24502-2009 chemical oxygen self-rescuer for coal mine
GB/T 28053-2011 Compound gas cylinder for respirator
GB/T 32166.2-2015 Personal protective equipment Eye and face protection Occupational eye and face protectors Part 2. Measurement methods
AQ1057-2008 Initial oxygen generator of chemical oxygen self-rescuer
MT427-1995 Technical conditions of potassium superoxide sheet oxygen generator
MT454-2008 Technical requirements for calcium hydroxide for isolated oxygen breathing apparatus and self-rescuer
3 terms and definitions
GB/T 12903-2008 and GB 24502-2009 and the following terms and definitions apply to this document.
3.1
Self-containedclosed-circuitoxygenbreathingapparatus
Isolate the human respiratory organs from the atmosphere, use chemical oxygen or compressed oxygen as the oxygen source, and absorb exhaled carbon dioxide
Closed to form a complete breathing cycle, a respirator for wearers to use in the absence of oxygen or toxic and harmful gas environment.
3.2
Rated working time
Respirator operating time determined under specified test conditions.
3.3
Carryingcontainer
Containers for placing and carrying respirators in non-operating state.
3.4
Mouthpiece assembly
It is a device that allows the air to come in and out through the occlusion of teeth or the support of teeth and headband. The nose is closed by a nose clip and the lips are closed.
Note. The mouthpiece component includes mouthpiece, nose clip and fixing device.
3.5
Breathing bag
Gas storage device for compensating for changes in gas supply demand and providing peak flow demand during the suction process.
3.6
Exhaust valve reliefvalve
Non-return valve for releasing excess pressure in the breathing airbag.
4 Classification, grading and marking
4.1 Classification
By oxygen source.
a) The source of oxygen is the oxygen generator NaClO3, marked with the code. C;
b) The source of oxygen is compressed oxygen, marked with the code. D;
c) The source of oxygen is oxygen generator KO2, marked with the code. K.
4.2 Classification
According to the rated protection time (t), it is divided into four levels of 10min, 15min, 20min, and 30min, of which.
a) 10min≤t <15min, marking code. 10;
b) 15min≤t <20min, marking code. 15;
c) 20min≤t <30min, marking code. 20;
d) t≥30min, marking code. 30.
4.3 Marking
The product mark consists of four parts. name, this standard number, respirator category and level.
Example. An oxygen breathing apparatus for escape with a rated protection time of 20 min and an oxygen source of oxygen generator NaClO3 is marked as. oxygen escape breathing apparatus
5 Technical requirements
5.1 Design requirements
5.1.1 General requirements
The design of the respirator should meet the following requirements, check according to the method specified in 6.2, and evaluate in 6.14.
a) The structure of the respirator should be reliable, simple, compact, easy to carry and hang, easy to remove and wear, and difficult in dark or limited space.
Under conditions, it should also be easy for users to wear;
b) when used in accordance with the manufacturer's instructions, the respirator should be designed so as not to interfere with work activities;
c) The respirator should have no protruding parts or sharp edges, and should not be hung when passing through a narrow passage;
d) the part of the respirator in contact with the user should not have sharp corners or burrs;
e) The design and structure of the respirator should be able to prevent the intrusion of external air, and the air tightness meets the requirements of this standard;
f) The respirator should be able to prevent chemicals from entering the wearer's respiratory tract, and saliva and condensation generated by the user should not affect the respirator.
Normal function or cause any harm to the user;
g) The quick start system or the opening and closing device should not be accidentally triggered, and should be clearly observed after the respirator is turned on;
h) that the surface temperature of any part of the respirator in contact with the user should not cause personal injury during work;
i) chlorate oxygen candles shall have pressure safety devices (if equipped);
j) The mask should be a mouthpiece component or full face mask, which can be reliably connected to the respirator.
5.1.2 Special requirements for D-type design
D-type respirators should also meet the following requirements, check according to the method specified in 6.2, and evaluate in 6.14.
a) The casing should have sufficient strength, and the back plate of the lower casing should conform to the physiological curve of the human back; the buckles used to fix the upper and lower casings should be tight.
Moderate, flexible opening and closing can prevent accidental hanging;
b) The parts of the respirator that need to be operated by the user should be within reach and convenient for independent operation; the adjustable parts and control valves are not in use.
There should be accidental sliding, loosening, etc .;
c) The pressure gauge should be installed in a position convenient for users to observe;
d) The respirator should maintain its working performance in any direction. When it is removed from the backpack and still wearing a mask, the respirator should be normal.
Oxygen supply;
e) D-type automatic respirator should be full-face mask.
5.2 Material requirements
5.2.1 General requirements
The materials used in the respirator should meet the following requirements, check according to the method specified in 6.2, and evaluate in 6.14.
a) The materials used in respirators should have sufficient mechanical strength, resistance to fatigue, corrosion and aging;
b) The external parts of the respirator must not use aluminum, magnesium, titanium and their alloys to avoid being exposed to impact friction and causing the combustion of flammable gases.
explosion;
c) Breathing apparatus should be made of non-metallic materials and have antistatic properties.The surface insulation resistance should not exceed 1 × 109Ω.
Tested according to the method specified in 26.13 of GB 3836.1-2010;
d) The material on the respirator that is in direct contact with the user's skin should be non-irritating to the skin and not harmful to health;
e) materials that may come into contact with oxygen shall ensure that no oxy-fuel reaction occurs;
f) The rubber material used in the respirator shall comply with the provisions of 5.5.2 in GB 24502-2009;
g) The dust filter pad used by the respirator shall meet the requirements of 5.5.4 in GB 24502-2009;
h) The carbon dioxide absorbent shall comply with the provisions of MT454-2008.
5.2.2 Special requirements for D-type respirators
In addition to the D-type respirator meeting the general requirements, the compressed oxygen in the cylinder should meet the requirements of GB/T 8982-2009.
5.2.3 Special requirements for K-type respirators
In addition to the K-type respirator meeting the general requirements, oxygen generators should meet the requirements of MT427-1995.
5.3 Performance requirements
5.3.1 Appearance quality
Check in accordance with the method specified in 6.2.The outer surface of the respirator should be free of scratches, scars, and other obvious defects.The material and structure of the components should be
Can withstand normal use conditions and the temperature, humidity and mechanical shock that may be encountered. Mechanical properties and temperature as specified in 6.5 and 6.8.1
After humidity pretreatment, the parts should not fall off, be damaged or deformed. The logo and the information provided by the manufacturer are complete and clear.
5.3.2 Quality
The overall weight of the respirator, including the portable device, should not be greater than 5kg, and it should be tested according to the method specified in 6.3.
5.3.3 Air tightness
5.3.3.1 Airtightness of portable devices
After the air-tightness test of the portable device, the water column pressure drop value within 15s should not be greater than 80Pa, and it should be tested according to the method specified in 6.4.1.
5.3.3.2 Airtightness of the whole machine
The respirator ready for use should have sufficient air tightness, and the pressure drop should not exceed 100Pa within 1min. Respirator according to 6.5, 6.6 and
6.8.1 Airtightness shall also be maintained after flammability test, mechanical property pretreatment and temperature and humidity pretreatment, respectively, according to the method specified in 6.4.2
Detection.
5.3.4 Mechanical properties
After the drop resistance and mechanical strength test according to 6.5, the respirator should be free of cracks and obvious deformation. D-type respirators should also meet 5.3.8 (qi
Tightness and gas supply).
5.3.5 Flammability
After being removed from the flame, all parts exposed to the flame shall not burn or self-extinguish within 5s, and shall be tested according to the method specified in 6.6.
5.3.6 Performance
5.3.6.1 Rated protection time
After pretreatment in accordance with the provisions of 6.5 and 6.8.1 in order of mechanical properties and temperature and humidity, the test shall be carried out in accordance with the methods specified in 6.7.
To its rated rated protection time (35L/min), and the working time under the 10L/min test conditions is at least the rated protection time
3 times.
5.3.6.2 Oxygen content
After pretreatment in accordance with the provisions of 6.5 and 6.8.1 in order of mechanical properties and temperature and humidity, the test shall be carried out in accordance with the method specified in 6.7.
The oxygen content should not be less than 21% by volume, and not less than 17% by volume within 2 minutes at the beginning of the test.
5.3.6.3 Carbon dioxide content
After pretreatment in accordance with the provisions of 6.5 and 6.8.1 in order of mechanical properties and temperature and humidity, the test shall be carried out in accordance with the method specified in 6.7.
The carbon dioxide content should not be greater than 3% by volume.
5.3.6.4 Inhaled gas temperature
After pretreatment in accordance with the provisions of 6.5 and 6.8.1 in order of mechanical properties and temperature and humidity, check according to the method specified in 6.7.
The temperature should not be higher than 60 ° C.
5.3.6.5 Respiratory resistance
After pretreatment in accordance with the provisions of 6.5 and 6.8.1 in order of mechanical properties and temperature and humidity, the test shall be performed in accordance with the methods specified in 6.7.
More than 1kPa, the expiratory resistance is not more than 1.2kPa, and the sum of the two is not more than 1.8kPa.
5.3.7 Temperature adaptability
According to the methods specified in 6.8.2 and 6.8.3, the respirator should work without failure under the specified conditions (low temperature, high temperature), and at the same time
Meet the requirements of rated protection time, oxygen content, carbon dioxide content and respiratory resistance.
5.3.8 Practical Performance
According to the methods of 6.8.4 and 6.14, under the conditions of simulated use, the performance that is difficult to evaluate in other test methods, such as 5.1, 5.2.1,
5.3.1, 5.4.1, 5.4.2, 5.4.3, 5.4.4, 5.4.5, 5.4.8.1, 5.4.10, 5.4.11.1, 5.4.11.3, 5.4.11.4, 5.4.11.5. Subjective
Evaluation.
During the test, the respirator should not show intolerance by the wearer, other task failures caused by factors such as design, materials, parts, etc.
Happening. If the respirator fails the test, the laboratory should describe the test method in detail so that other laboratories can repeat the test process.
5.3.9 Special requirements for D-type respirators
5.3.9.1 Air tightness
When performing the air tightness test of the high and medium pressure system according to the method specified in 6.4.3, the D-type respirator should meet the requirement of no air leakage within 2 minutes.
5.3.9.2 Gas supply
According to the method of 6.8 in GB 23394-2009, the oxygen supply of D-type respirator should meet the following requirements according to its air supply method.
a) Quantitative oxygen supply. The quantitative oxygen supply should not be less than 4.0L/min;
b) Auto-supply oxygen supply. The opening pressure of the auto-supply valve is not less than.200Pa; when the cylinder pressure is above 1MPa, the oxygen supply should
Less than 80L/min;
c) Manual supply oxygen supply. when the cylinder pressure is 5% ~ 100% of the rated working pressure, the quantitative oxygen supply is not less than 1.2L/min;
The opening pressure of the dynamic supply valve is not less than.200Pa; after the automatic supply valve is opened, when the cylinder pressure is above 1MPa, the oxygen supply should not
Less than 80L/min.
5.3.9.3 Cleaning and disinfection
The materials used in the respirator should be resistant to the cleaning and disinfecting agents recommended by the manufacturer.
Obvious damage was evaluated in 6.14.
5.4 Main component requirements
5.4.1 Mouthpiece components
The mouthpiece components shall meet the following requirements, be inspected in accordance with the methods specified in 6.2, and evaluated in 6.14.
a) Mouthpiece components should be equipped with mouthpieces (upper and lower teeth) and non-removable nose clips;
b) The mouthpiece assembly should ensure a reliable seal in use and not accidentally block the breathing circuit;
c) The mouthpiece assembly should be equipped with an adjustable or self-adjusting headband to facilitate auxiliary adjustment when the load on the wearer's mouth is excessive;
d) The nose clip should ensure that the nose is sealed, not easy to fall off, and form a soft connection with the mouthpiece components; when wearing the mouthpiece components,
Notice the nose clip naturally.
5.4.2 Full face mask
Full face masks should meet the following requirements.
a) The full-face mask should be equipped with an adjustable or self-adjusting headband.The headband design should be easy to wear and remove; the headband should be able to withstand normal wear.
The tensile direction of 150N is 10s without breaking, and the test is performed according to the provisions of 6.13 in GB 2890-2009.
b) The leakage rate of the full face mask should not be greater than 0.05% .The test shall be carried out in accordance with the provisions of 6.6 in GB 2890-2009.
Leak rate.
c) The full-face lens should be installed on the mask in an air-tight manner.The lens should ensure that the vision is true and distortion-free, with certain anti-fog measures.
The method specified in 6.2 is checked and evaluated in 6.14.
d) The full face lens should be able to withstand the impact of a 22mm diameter, 45g steel ball falling freely at a height of 1.3m, and meet airtightness
Sexual requirements. The test should be conducted in accordance with GB/T 32166.2-2015; the light transmittance of the full-face lens should not be less than 85%.
The inspection shall be conducted in accordance with the provisions of GB/T 2410-2008.
5.4.3 Goggles
If the respirator is equipped with goggles, they need to be used together.The goggles should meet the following requirements.
a) Goggle lenses should be anti-fog and evaluated in accordance with 6.14;
b) The headband of the goggles should be soft enough to be easily adjusted or self-adjusting, and checked in accordance with the method specified in 6.2;
c) The goggles should be connected with the respirator to avoid loss after the respirator's carrying device is opened.The goggles should not affect the respirator
Wear, check according to the method specified in 6.2, and evaluate in 6.14;
d) The goggles should be subjected to the same impact tests as full-face lenses, and should not be damaged in any way to cause them to fail, or be worn.
Cause harm. The test method is conducted in accordance with the provisions of GB/T 32166.2-2015.
5.4.4 Connections
Respirator connections shall meet the following requirements, be inspected in accordance with the methods specified in 6.2, and evaluated in 6.14.
a) The design or structure of the respirator should make the connecting parts easy to remove for cleaning, inspection and testing;
b) Detachable connectors shall be easy to connect and tighten by hand, and inspected in accordance with the methods specified in 6.2;
c) the parts used for sealing in the connector shall not fall off and shift;
d) Withstand 50N axial tensile force, duration is 10s, there should be no deformation at the connection, and the function is normal. The test is in accordance with GB 2890-2009
6.13.
e) High, medium and low voltage connections shall not be interchangeable.
5.4.5 Carrying gear
If the respirator is equipped with a harness, check it according to the method specified in 6.2 and evaluate it in 6.14.The inhaler harness should meet the following requirements;
a) The harness should enable the wearer to quickly and easily wear and remove the respirator without assistance;
b) The respirator should be equipped with a harness or other form of support to ensure that the wearer can move his hands freely during normal work.
5.4.6 Initial oxygen generator
The initial oxygen generator (if equipped) of the respirator should meet the requirements of AQ1057-2008.
5.4.7 Intake and exhalation valves
Respirator suction and exhalation valves should meet the following requirements.
a) The valve should be able to work normally when in any direction, and check in accordance with the method specified in 6.2;
b) The valve should be easy to maintain, and at the same time it will not be replaced by mistake.Check in accordance with the method specified in 6.2;
c) The suction valve and exhalation valve should have reverse airtightness, and the reverse leakage volume should not be greater than 0.3L/min, according to the method specified in 6.9
Detection;
d) The manufacturer shall be allowed to adopt the same design for the suction valve and exhalation valve components, sub-assemblies and components, according to the method specified in 6.2
an examination;
e) If the manufacturer provides clear instructions, the suction and exhalation valves can also have different designs, and illustrations (photos, pictures
(Paper) explain how to assemble correctly, check according to the method specified in 6.2;
f) All parts should be clearly described and marked so that they can be assembled correctly. The manufacturer shall provide methods to check whether the assembly is correct,
Check in accordance with the method specified in 6.2.
5.4.8 Vent valve
5.4.8.1 General requirements
The ventilator exhaust valve should meet the following requirements, check in accordance with the method specified in 6.2, and evaluate in 6.14.
a) If the respirator is equipped with an exhaust valve, the valve shall work normally in any direction and shall prevent pollution and mechanical damage;
b) The manufacturer shall provide a method for plugging the exhaust valve so that the entire machine can be tested for air tightness.
5.4.8.2 opening pressure
The opening pressure of the exhaust valve should be 100Pa ~ 500Pa. When the exhaust valve is placed in the breathing circuit
The pressure difference between the air valve and the breathing airbag should not be greater than the opening pressure of the exhaust valve, and the detection should be performed according to the method specified in 6.10.
5.4.8.3 Combining Strength
The exhaust valve housing and its connecting parts shall be able to withstand an axial force of 50 N for 10 s, according to the method specified in 6.11
Detection.
5.4.8.4 Reverse airtightness
When the exhaust valve is subjected to a pressure of 1kPa in the reverse direction, the pressure drop within 1min does not exceed 100Pa, and the method shall be carried out in accordance with 6.12.
Detection.
5.4.9 Airbag
The volume of the breathing airbag should be at least 5L. Respirators equipped with breathing airbags or other protective measures should be able to withstand possible exposure to
The use environment is tested in accordance with the method specified in 6.13.
5.4.10 Hoses
Breathing hoses (if equipped) should be soft, squeezed or twisted without affecting breathing or affecting head movements.Check in accordance with 6.2, and
Evaluated in 6.14.
5.4.11 Special requirements for D-type components
5.4.11.1 High and medium voltage components
High and medium voltage components are evaluated in 6.14 and the following conditions should be met.
a) Metal high-pressure parts should be able to withstand 1.5 times the rated working pressure for 1 min without obvious deformation and leakage;
b) Non-metallic parts should be able to withstand 2 times the rated working pressure for 5 minutes without obvious deformation and leakage;
c) All medium-voltage components should be able to withstand 2 times the rated working pressure for 15 minutes without obvious deformation and leakage.
5.4.11.2 Gas cylinder
Steel gas cylinders shall meet the requirements of GB/T 5099-1994; composite gas cylinders shall meet the requirements of GB/T 28053-2011.
5.4.11.3 Gas cylinder valve
Gas cylinder valve design should ensure safety performance, easy to open manually or automatically, and should not be closed accidentally after opening. Gas cylinder valve handwheel normal operation
At this time, the valve core should not be completely turned down from the valve body, inspected according to the method specified in 6.2, and evaluated in 6.14.
5.4.11.4 Pressure reducer
Any adjustable medium-pressure parts on the pressure reducer should be firmly locked with sealing measures to observe abnormal use operations.
The method is checked and evaluated in 6.14.
5.4.11.5 Pressure gauge
The pressure gauge shall meet the following requirements, be inspected according to the method specified in 6.2, and evaluated in 6.14.
a) The respirator should be equipped with a pressure gauge that can show the maximum working pressure of the cylinder, and the pressure gauge is not affected by the cylinder sealing device;
b) The pressure gauge should be equipped with a bursting disc to prevent the user from being injured.The window of the pressure gauge should be made of a material that does not generate debris when broken.
c) The pressure gauge should be equipped with a throttle valve. When the pressure gauge connection pipeline is disconnected, the leakage gas flow should not be greater than 20MPa.
25L/min.
5.5 Information to be provided by the manufacturer
Check in accordance with the methods specified in 6.2. Each set of respirators should provide Chinese instruction manuals for users to read and understand. Related product selection
The content of selection, use and maintenance shall be consistent with the relevant requirements of GB/T 18664-2002 and include at least the following information.
a) scope of application and restrictions;
b) the type of respirator;
c) correct wearing, use, maintenance, care and storage information, recommended use temperature, storage temperature and humidity range;
d) the product shall be marked with the contact details of the manufacturer or its designated service provider;
e) explain the meaning of the respirator's rated protection time, and the warning is not equivalent to the actual use time;
f) A description of typical failures, causes, and remedies.
6 Test method
6.1 Test samples and test environmental conditions
6.1.1 Test samples
Unless otherwise required, testing of the entire set requires 3 samples. The sample should conform to the description of the product identification and be functional.
6.1.2 Subject requirements
In the low-temperature use performance test and practical performance test, when the subject is involved in the test, the subject should meet GB/T 23465-
According to the requirements of 4.2 in.2009, the routine testing of subjects' heart rate and blood pressure should be qualified.
6.1.3 Test environmental conditions
Unless otherwise specified, the tests shall be performed under the following environmental conditions.
a) Temperature range. 16 ℃ ~ 32 ℃;
b) Humidity range. Relative humidity is 20% ~ 80%.
6.2 apparent inspection
Appearance inspection of the respirator should be performed before the laboratory performance test, including the appearance, structure, and information provided by the manufacturer
And identification check. According to the requirements of various technical requirements, before and after the laboratory performance test, visually inspect the samples and report them.
Report the results.
6.3 Quality
6.3.1 Number of samples
3 received samples, if there are different types, at least 1 sample for each type.
6.3.2 Test equipment
Balance or bench scale with a range of 0kg ~ 10kg and an accuracy of 1g.
6.3.3 Test method
Place each respirator (excluding the outer packaging) on a balance or a platform scale, weigh 3 times and take the average.
6.4 Air tightness
6.4.1 Airtightness of portable devices
Test according to the method specified in 6.4 of GB 24502-2009.
6.4.2 Airtightness of the whole machine (C and K type respirators)
The respirator was placed in a closed cubic container with a volume of 1m3, and the pressure relief valve was closed. Into a clean and dry air flow, when the pressure reaches
When it reaches 800Pa, observe and record the pressure drop within 1min.
6.4.3 Air tightness of high and medium pressure system (D-type respirator)
For high and medium pressure systems, a pressure of 18 MPa to 20 MPa is established. Soap liquid is applied to the joints of the high pressure system, and it is checked whether there is air leakage within 2 minutes.
6.5 Mechanical performance test
6.5.1 Drop resistance test
The escape breathing apparatus was freely dropped to the concrete floor from a height of 1.5m, and the sample should be able to withstand falling from 3 different angles.
Inspect and record the injuries after the ventilator falls.
6.5.2 Mechanical strength test
6.5.2.1 The schematic diagram of the mechanical strength test device is shown in Figure 1.It includes a steel container (K) fixed vertically on the piston (S).
Each rotating cam (N) is raised by 20mm, and falls on a steel plate (P) with its own weight as the cam rotates. Steel capacity
The weight of the device should be more than 10 kg and the base of the test equipment should be at least 10 times the weight of the container or bolted to the ground.
In millimeters
Explanation.
K --- steel tank;
N --- cam;
P --- steel plate;
S --- Piston.
Figure 1 Mechanical strength test device
6.5.2.2 The test samples shall be placed in the partition of the container (K) to avoid collision with each other during the test.The samples shall be retained in the horizontal direction.
(6 ± 2) mm clearance and can move freely in the vertical direction.
6.5.2.3 The test equipment shall be rotated at a speed of 100 r/min for 5 minutes, and the damage after the respirator test is checked and recorded.
6.6 Flammability test
Test according to the method specified in 6.15 of GB 2626-2006.
6.7 Performance test
6.7.1 Test device
The schematic diagram of the device used for this test is shown in Figure 2. The device mainly includes.
a) Ventilator with adjustable tidal volume and breathing frequency. Tidal volume range 0L/time ~ 5L/time, breathing frequency is 10 times/min, 15 times /
min, 20 times/min, 25 times/min, 30 times/min, respiration ratio 1. 1;
b) Simulated O2 consumption of the auxiliary lung;
c) servo driven valve;
d) check valve;
e) Mass flow meter. range 0L/min ~ 5L/min, resolution ± 0.01L/min; range 0L/min ~ 50L/min, resolution
± 0.1L/min;
f) Heating humidifier. heating temperature control range 20 ℃ ~ 50 ℃, resolution ± 0.1 ℃, humidification ability can achieve 95% relative humidity
the above;
g) coolers;
h) CO2 gas analyzer. range 0% ~ 10%, resolution ± 0.1%;
i) O2 gas analyzer. range 0% ~ 100%, resolution ± 0.1%;
j) connectors;
k) Pressure sensor. 0Pa ~.2000Pa, resolution ± 1Pa;
l) Temperature sensor. 0 ℃ ~ 100 ℃, resolution ± 0.1 ℃.
Explanation.
1 --- ventilator;
2 --- assisted lung (simulate gas consumption);
3a --- servo driven valve (exhalation path);
3b --- servo driven valve (suction path);
4a --- servo driven valve (simulating gas consumption);
4b --- check valve;
5a --- mass flow regulating valve (supplemental CO2);
5b --- mass flow regulating valve (supplement N2);
6 --- breathing gas humidifier;
7 --- breathing gas cooler;
8 --- inhaled gas analyzer (CO2, O2);
9 --- Exhaled gas analyzer (CO2);
10 --- standard connection (for measuring the breathing temperature of the closed-circuit respirator to
And respiratory resistance).
Figure 2 Performance test device for oxygen escape breathing apparatus
6.7.2 Test principle
The device simulates a user's uptake of oxygen.
When inhaling, the auxiliary lung recovers from the breathing circuit a gas equivalent to the volume of oxygen in the breathing gas to be consumed through the valve.
When exhaling, the recovered oxygen is replaced with the same volume of CO2 by the mass flow meter, and N2 is supplemented by the mass flow meter to control
volume.
In order to simulate various breathing effects related to the respirator, the device replenishes gas through the valve to complete the inhalation of the same cycle as the ventilator
And exhalation path. The respirator under test is supplied by the ventilator through a servo-driven exhalation valve and an inhalation valve to provide gas.
Breathing cycle. In the exhalation path, the gas is humidified by a water vapor humidifier, and the volume fraction of CO2 in the exhaled gas is placed after the humidifier
Gas analyzer. The inspiratory and expiratory temperature is determined by a temperature sensor (the sensitivity is equivalent to
0.2mm thickness NiCr-Ni thermocouple). Similarly, respiratory resistance is also measured at specific locations inside the connector. When inhaling, inhale
The body enters through the suction valve, while a breathing gas cooler keeps the gas volume at a stable level. CO2 and O2 for inhaled gas
The volume fraction was determined by a getter gas analyzer. The total dead space (excluding the ventilator) of the air path of the test device shall not exceed 2L.
For different masks of the respirator, different connectors should be used for testing. A full-face respirator should be used as shown in Figure 3.
The head mold shown below was tested. Respirators with mouthpiece assemblies shall be tested using connectors as shown in Figure 4.
In millimeters
Explanation.
1 --- Headform;
2 --- pressure measurement point;
3--temperature measurement point (inhale);
4 --- temperature measurement point (exhalation);
5 --- Thermocouple.
Figure 3 Head mask for full-face respirator test
In millimeters
Explanation.
1 --- pressure measurement point;
2 --- Temperature measurement point.
Figure 4 Coupling for mouthpiece component respirator test
6.7.3 Test conditions
The parameters of the test device during the test shall conform to Table 1.
Table 1 Test conditions
Intake air temperature
Inlet humidity (relative humidity)
flow
L/min
Tidal Volume
L/time
Respiratory rate
Times/min
carbon dioxide
Entry volume
L/min
Oxygen extraction
L/min
Exhaled
CO2 content
37 ± 0.5 ≥95
10 1 10 0.4 0.4 4
35 1.75 20 1.575 1.76 4.5
Note. The parameters in the table are the values of atmospheric pressure 101.3kPa, and the temperature is 37 ℃.
6.7.4 Test preparation
6.7.4.1 Calibration or calibration of oxygen and carbon dioxide analyzers, flow meters, temperature sensors, pressure sensors, etc.
6.7.4.2 Before the start of the test, inspect each instrument and component, and check the airtightness of the entire device.
6.7.4.3 Calibrate the tidal volume.
6.7.5 Test procedure
6.7.5.1 Select the breathing frequency and tidal volume of the ventilator according to the specified test conditions.
6.7.5.2 Turn on the ventilator and warm the humidifier to make the exhaled gas reach and stabilize at a relative humidity greater than or equal to 95% and a temperature of (37 ±
0.5) ° C.
6.7.5.3 Turn on instruments such as carbon dioxide cylinders, auxiliary lungs, and gas analyzers.When the carbon dioxide concentration in the mixed gas reaches 4.5%, stop
Lower ventilator, auxiliary lung and carbon dioxide intake. Record the CO2 intake and oxygen consumption.
6.7.5.4 Connect the respirator to the test equipment (airtight connection), start the respirator or open the initial oxygen generator, and measure the initial oxygen generation
Yes, at the same time turn on the stopwatch and observe the initial oxygen generation.
6.7.5.5 Turn on the ventilator, carbon dioxide intake, assist the lungs, turn on the stopwatch, and the test officially started. During the test, observe the bulging of the airbag
With the shrinkage, the inlet temperature and humidity, the amount of oxygen extracted, and the amount of carbon dioxide injected should meet the requirements. Record oxygen, carbon dioxide content,
Air temperature, expiratory resistance, inspiratory resistance, and surface temperature of the respirator until the test is stopped. Record one data at least 30s.
6.7.6 Results processing
From the beginning of the test to the end of the test, if the measured oxygen, carbon dioxide content, inhalation temperature, exhalation resistance,
The inhalation resistance meets the requirements of 5.3.6, and this period is the rated protection time of the respirator.
6.8 Temperature adaptability test
6.8.1 Preprocessing
Place the sample in the container and perform the following conditions in order.Before each step, the sample temperature should be restored to the room.
After the temperature is 4h, the next test is performed. The pretreatment should be performed under the condition that the sample is not affected by thermal shock. The specific sequence is as follows.
a) Place in a high temperature test chamber at (70 ± 3) ℃ and relative humidity not greater than 20% for (72 ± 3) h;
b) placed in a humid and hot test chamber at (70 ± 3) ℃ and relative humidity between 95% and 100% for (72 ± 3) h;
c) Place in a low temperature test chamber at (-30 ± 3) ℃ for (24 ± 1) h.
6.8.2 Low temperature test
Before the low temperature performance test, the test sample should be placed in an environment of -5 ° C for (20 ± 1) h, and then the sample should be at room temperature according to 6.7.
The test requires a gas flow of 35L/min.
6.8.3 High temperature test
Before the high temperature performance test, the test sample should be placed in an environment of 60 ° C for (20 ± 1) h, and then the sample should be at room temperature according to the requirements of 6.7
It is required to use a gas flow rate of 35L/min for testing.
6.8.4 Low temperature practical performance test
6.8.4.1 Two respirators to be used are placed in a low temperature -5 ℃ environment for (4 ± 1) h.
6.8.4.2 Two participants wearing warm clothing wore pre-cooled respirators at a temperature of -3 ℃ ~ -5 ℃, and then
Walk test at 6.5km/h (can be done on a treadmill). During the test, continuous measurement of oxygen in the inhaled gas is required
And carbon dioxide content.
6.8.4.3 After walking for 10 minutes, the two participants returned to the normal environment and continued walking at a speed of 6.5 km/h for 5 minutes.
6.8.4.4 After the test, check and record the respirator for damage, and ask the participants about their experience in breathing and wearing comfort.
For subjective evaluation.
6.9 Reverse air leakage from suction and exhalation valves
Test according to the method specified in 6.14 of GB 23394-2009.
6.10 Exhaust valve opening pressure
Test according to the method specified in 6.7 of GB 24502-2009.
6.11 Combining Strength
An axial force of 50 N was applied to the test sample, including the joint, for 10 s, and the condition of the joint was observed.
6.12 Reverse airtightness of exhaust valve
Test according to the method specified in 6.19 of GB 23394-2009.
6.13 Respiratory airbag volume
Seal the airbag outlet of the breathing airbag and the exhaust valve, and inject 20 ° C of pure water from the air inlet until it is full. Pour the water into the range 0L ~ 8L.
10mL graduated cylinder (or equivalent equipment), measure the volume.
6.14 Practical Performance
6.14.1 Test preparation
6.14.1.1 Four subjects who meet the requirements of 4.2 of GB/T 23465-2009, are healthy and have some experience in wearing protective equipment.
Register basic information such as name, age, gender, height and weight.
6.14.1.2 Environmental conditions. 16 ℃ ~ 32 ℃, relative humidity 20% ~ 80%.
6.14.1.3 Before the test, the subject should read and understand the respirator instruction manual in advance, and understand the evaluation items and requirements of the respirator.
Request, be guided by the respirator opening procedure, wearing and operation. After completing the above items, the subject should be able to complete breathing independently in the dark
Opening and wearing operations.
6.14.2 Test content
6.14.2.1 Before conducting the escape test, record the atmospheric temperature, relative humidity and the
quality.
6.14.2.2 After the subject wears a respirator and starts it, the test shall begin in order to complete the following tasks in order.
a) Static test. The subject remains in a comfortable sitting position without any activity for a duration of 1 min;
b) Jogging test. The subject jogs on the running platform in a normal posture, with a speed of 8.0 km/h and a duration of 1 min;
c) Slope test. The subject walks in a normal posture on a running platform with a gradient of 20 °, the speed is 2.4 km/h, and the duration is
1min;
d) Medium-speed walking test. The subject walked on the running platform in a normal posture with a speed of 4.0 km/h and a duration of 2 minutes;
e) Stair test. Subjects walked for 5 minutes in an environment containing corridors and stairs, where the height of climbing stairs was controlled at
15m, crawling speed is about 10m/min. After completing a set of tasks, if the respirator is still working properly, continue to complete the first step
Secondary task.
6.14.2.3 During the test, the test subject should be accompanied by an assistant and record the following.
a) the type and timing of different activities;
b) poor vision due to fogging of the blindfold;
c) Subjective description of the subject's discomfort to the respirator.
6.14.2.4 The test should be terminated when oxygen production or supply ceases, or when the subject complains of intolerance.
6.14.2.5 Use the cleaning agent or disinfectant recommended by the manufacturer to clean and disinfect the D-type respirator, and perform the appearance quality according to 6.2
an examination.
6.14.2.6 After the end of the escape test, each subject shall be in accordance with Chapter 6 of GB/T 23465-2009 and the table in GB/T 23465-2009.
3 requirements, and subjective evaluation according to the requirements of this standard.
6.14.2.7 The test report shall meet the requirements of Chapter 7 of GB/T 23465-2009.
7 Identification and packaging
7.1 Identification
Each respirator should be clearly and securely identified.
a) the words "for escape only";
b) warning signs or Chinese warning instructions;
c) product name and manufacturer logo;
d) product model and mark;
e) this standard number and year number;
f) date of manufacture (or number), period of use and certification mark or lot number;
g) Product origin, manufacturer name, full address, zip code and telephone.
7.2 Packaging
Respirator packaging should meet the following requirements.
a) Each respirator should have a fixed packing box.The packing box should be clean and dry. It is not allowed to use the respirator which can cause rust or cause harm to the respirator.
Gaseous material;
b) The surface of the packaging box should have the manufacturer's name or trademark, the product name and model, the production date and batch number, and the number of products;
c) Moisture-proof measures shall be taken in the packing box; the disassembled packing components shall be properly placed in the box, the layout shall be reasonable, and fixed measures shall be taken.
There should be a product certificate and product manual in the box;
d) The full-face mask should be packed separately, and the full-face lens should be protected.
references
[1] GA411-2003 Chemical oxygen fire self-rescue respirator
[2] GA632-2006 Positive pressure fire oxygen respirator
[3] EN136..1998 Respiratoryprotectivedevices-Fulfacemasks-Requirements, testing, marking
[4] EN137..2006 Respiratoryprotectivedevices-Self-containedopen-circuitcompressedair
breathingapparatuswithfulfacemask-Requirements, testing, marking
[5] EN403..1993 Filteringrespiratoryprotectivedevicesforself-rescuefromfire
[6] EN13274-2..2001 Respiratoryprotectivedevices-Methodsoftest-Part 2. Practicalper-
formancetests
[7] EN13274-3..2001 Respiratoryprotectivedevices-Methodsoftest-Part 3. Determination
ofbreathingresistance
[8] EN13274-4..2001 Respiratoryprotectivedevices-Methodsoftest-Part 4. Flametests
[9] EN13794..2002 Respiratoryprotectivedevices-Self-containedclosed-circuitbreathingap-
paratusforescape-Requirements, testing, marking
Related standard:   GB/T 38230-2019  GB 12014-2019
Related PDF sample:   GB/T 38300-2019  GB 32166.1-2016
   
 
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