GB 38451-2019 English PDFUS$359.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 38451-2019: Respiratory protection - Self-contained open-circuit compressed air breathing apparatus for escape Status: Valid
Basic dataStandard ID: GB 38451-2019 (GB38451-2019)Description (Translated English): Respiratory protection - Self-contained open-circuit compressed air breathing apparatus for escape Sector / Industry: National Standard Classification of Chinese Standard: C73 Classification of International Standard: 13.340.30 Word Count Estimation: 18,163 Date of Issue: 2019-12-31 Date of Implementation: 2020-07-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration Summary: This standard applies to self-contained open-circuit compressed air breathing apparatus for escape from accidents in operation and public places. This standard does not apply to oxygen breathing apparatus, diving breathing apparatus, self-contained open circuit compressed air breathing apparatus for operation. GB 38451-2019: Respiratory protection - Self-contained open-circuit compressed air breathing apparatus for escape---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Respiratory protection--Self-contained open-circuit compressed air breathing apparatus for escape ICS 13.340.30 C73 National Standards of People's Republic of China Respiratory self-sufficient open-circuit compressed air Escape breathing apparatus 2019-12-31 release 2020-07-01 implementation State Administration of Market Supervision Published by the National Standardization Administration ContentsForeword I 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Classification, grading and marking 2 5 Technical requirements 3 6 Test method 7 7 Identification and packaging 14 References 15ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the Ministry of Emergency Management of the People's Republic of China. This standard was drafted. Institute of Chemical Defense, Academy of Military Sciences, Institute of Military Engineering Technology, Academy of System Engineering, Academy of Military Sciences, Mays (China) Safety Equipment Co., Ltd., Shanghai Baoya Safety Equipment Co., Ltd., Honeywell Safety Equipment (Shanghai) Co., Ltd. the company. The main drafters of this standard. Yang Xiaobing, Wang Chunyu, Zhang Mingming, Fu Yahui, Yao Haifeng, Zhang Shouzheng, Ma Chuang, Wang Desheng, Zhou Chuan, Yan Xiaoshan, Ding Songtao, Wu Lei, Liu Ruimin, Lu Yukun. Respiratory self-sufficient open-circuit compressed air Escape breathing apparatus1 ScopeThis standard specifies the classification, classification, marking, technical requirements, test methods, identification and identification of self-sufficient open-circuit compressed air respirators for escape. package. This standard applies to self-sufficient open-circuit compressed air respirators for emergency escape in work and public places. This standard does not apply to oxygen respirators, diving respirators, and self-contained open-circuit compressed air respirators for work.2 Normative referencesThe 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 529-2008 Determination of tear strength of vulcanized rubber or thermoplastic rubber (trousers, right angles and crescents) GB/T 2410 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 7307-2001 55 ° unsealed pipe thread GB/T 12586-2003 Rubber or plastic coated fabrics-Determination of flexural damage resistance GB/T 12903-2008 Terms for personal protective equipment GB/T 13277.1 Compressed air Part 1. Pollutant purification level GB/T 16556-2007 self-contained open-circuit compressed air respirator GB/T 18664-2002 Selection, use and maintenance of respiratory protective equipment GB/T 23465-2009 Practical performance evaluation of respiratory protective equipment GB/T 28053 Compound gas cylinder for respirator3 terms and definitionsThe terms and definitions defined in GB/T 12903-2008 and GB/T 18664-2002 and the following terms apply to this document. 3.1 Self-contained open-circuit compressed air escape respirator forescape With its own compressed air source, it can provide clean air for personnel to breathe. The exhaled gas is directly discharged into the atmosphere for escape. A respirator. 3.2 Hood It can completely cover the head, eyes, nose, mouth to neck, and can also cover part of the shoulders or non-tight masks used in conjunction with protective clothing. Note. Rewrite GB/T 18664-2002, definition 3.1.12. 3.3 Full facepiece A close-fitting mask that covers the mouth, nose, eyes, and jaw. [GB 2626-2006, definition 3.8] 3.4 Rated working time Respirator operating time determined under specified test conditions. 3.5 Static pressure After the positive pressure device of the air supply valve is opened, the pressure in the mask when the system air circuit is balanced. [GB/T 16556-2007, definition 3.5] 4 Classification, grading and marking 4.1 Classification Divided into two types according to the mask type, as follows. a) Full-face-type self-contained open-circuit compressed air escape breathing apparatus, marked with the code. FF; b) Hood-type self-contained open-circuit compressed air escape breathing apparatus, marked with code. H. 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 five parts. name, this standard number, mask type, cylinder category and rated protection time. Mask type mark generation See 4.1 and 4.2 for code numbers and rated protection time marks. The letters F and G represent composite gas cylinders and steel gas cylinders, respectively. Example 1. Full-faced self-contained open-circuit compressed air escape respirator, using a composite gas cylinder, with a rated protection time of 15min ~ 20min, which is marked as. Escape breathing apparatus GB 38451-FF-F-15 The meaning of each element in the mark is as follows. FF --- full face mask; F --- composite gas cylinder; 15 --- The rated protection time is 15min ~ 20min. Example 2. A hood-type self-contained open-circuit compressed air escape respirator using a steel gas cylinder with a rated protection time of 10min ~ 15min, which is marked as. Escape breathing apparatus GB 38451-HG-10 The meaning of each element in the mark is as follows. H --- hood; G --- steel cylinder; 10 --- The rated protection time is 10min ~ 15min.5 Technical requirements5.1 Design requirements Check in accordance with 6.2 and evaluate in 6.12.The design of the respirator should meet the following requirements. a) Respirators should be simple, compact, reliable, and easy to inspect based on information provided by the manufacturer; b) The respirator should have no protruding parts or sharp edges, and the respirator should not be hung when the wearer passes through a narrow passage; c) The surface of the parts of the respirator that may come into contact with the wearer should be free of sharp edges and burrs; d) the respirator should be able to maintain its full function when in any direction; e) The respirator should be easy to wear and put into use, and it can be worn quickly even in adverse conditions such as dark and confined spaces; f) The installation position of the cylinder valve of the respirator should be convenient for the wearer to quickly open the cylinder valve; g) the respirator should have a device for filtering impurities in the compressed air; h) The respirator should be able to display the cylinder pressure in real time. 5.2 Material requirements Check in accordance with 6.2 and evaluate in 6.12.The respirator material should meet the following requirements. a) The materials used in the respirator should have appropriate mechanical strength and corrosion resistance; b) The materials used in the respirator should be resistant to the cleaning agents and disinfectants recommended by the manufacturer without significant damage after cleaning and disinfection; c) Materials on the respirator that may come into direct contact with the user's skin should be non-irritating to the skin and not harmful to health; d) If the manufacturer declares that the product can be used in a flammable and explosive environment, bare parts on the respirator should not use aluminum, magnesium, titanium and their alloys; e) If the manufacturer declares that the product can be used in a flammable and explosive environment, the surface resistance of the respirator backing material must not exceed 1 × 109Ω. Method test of 26.13 in GB 3836.1-2010. 5.3 Performance requirements 5.3.1 Quality After the cylinder is filled with gas, the overall weight of the respirator (excluding the carrying case) should not exceed 6.5kg. 5.3.2 Rated protection time Tested according to the method of 6.5, the rated protection time of the respirator should meet the classification requirements of its mark. 5.3.3 Respiratory resistance Tested according to method 6.6, the respiratory resistance of the respirator should meet the following requirements. a) For a hood-type respirator, when the cylinder is full pressure to 5MPa, the breathing frequency is 40 times/min, the tidal volume is 2.5L/breath, and the breath is exhaled Both resistance and suction resistance should not be greater than 1000Pa. When the cylinder pressure is 5MPa ~ 1MPa, the breathing rate is 25 times/min. The tidal volume is 2L/breath, the exhalation resistance and the inhalation resistance should not be greater than 500Pa. b) For full-face respirator, when the pressure of the cylinder reaches 5MPa, the breathing frequency is 40 times/min, and the tidal volume is 2.5L/breath. Positive pressure should be maintained in the mask. When the cylinder pressure is 5MPa ~ 1MPa, the breathing frequency is 25 times/min, and the tidal volume is 2L/time. Inhalation and exhalation resistance should not be greater than 800Pa. 5.3.4 Carbon dioxide content in inhaled gas Tested according to method 6.7, the content of carbon dioxide in the inhaled gas should not exceed 1.8%. 5.3.5 Leak rate Tested according to method 6.8, the leakage rate of the respirator should meet the following requirements. a) For full-face respirators, the average leak rate for at least 8 of the 10 subjects should not exceed 0.01%. b) For hood-type respirators, the average leakage rate (oral and nasal area) of at least 8 of the 10 subjects should not exceed 0.05%. 5.3.6 Temperature resistance 5.3.6.1 General requirements The respirator should work without failure at -15 ℃ ~ 60 ℃. Respirators for special temperature ranges shall be tested and marked as specified Temperature conditions. The respirator should meet the breathing resistance specified in 5.3.6.2 and 5.3.6.3 under the maximum and minimum temperatures in the specified temperature range. 5.3.6.2 Low-temperature respiratory resistance According to the method of 6.6.4, the hood type respirator requires that the low-temperature inhalation resistance should not exceed 500Pa, and the low-temperature exhalation resistance should not exceed 700Pa; Full-facepiece respirators require that positive pressure be maintained in the full-facepiece at all times, and low-temperature exhalation resistance should not exceed 1000Pa. 5.3.6.3 High-temperature breathing resistance Tested according to 6.6.5, the hood type respirator requires that the high-temperature inhalation resistance should not exceed 500Pa, and the exhalation resistance should not exceed 700Pa; Full-facepiece respirators require that positive pressure be maintained in the full-facepiece at all times, and high-temperature exhalation resistance should not exceed 1000Pa. 5.3.7 Static pressure Tested according to the method of 6.9, under equilibrium conditions, the pressure in the cavity of the full face mask should not be greater than 500Pa. Note. This indicator is for full-face respirators only. 5.3.8 Air tightness Tested according to the 6.10 method, the respirator (excluding the mask) should be tested for air tightness under a positive pressure of 750Pa. After the pressure stabilizes, the pressure becomes It should be no more than 30Pa within 1min. 5.3.9 Flammability Test sequentially in accordance with 6.11, 6.10, and 6.6.All parts of the respirator that may be exposed to the flame should have flame retardant properties. The burning time should be no more than 5s. After the test, the respirator should still maintain air tightness, meet the requirements of 5.3.3 respiratory resistance, and there should be no interruption of air supply phenomenon. 5.3.10 Practical performance According to the method of 6.12, under the conditions of simulated use, for the performance that is difficult to evaluate by other test methods, subjective evaluation is provided by the subject. The following requirements should be met. a) The respirator should be tested under normal conditions for normal temperature practical performance and low temperature practical performance; b) In any activity, if any subject fails to complete the specified activity because the respirator is not suitable for its intended use, then Find the respirator unqualified; c) If the respirator fails the test, the laboratory shall describe the test method in detail so that other laboratories can repeat the test process. 5.3.11 Mechanical strength Tested according to the methods of 6.4 and 6.6, the respirator should have no visible damage after vibration treatment, and the breathing resistance should meet the requirements of 5.3.3. 5.4 Component requirements 5.4.1 Mask 5.4.1.1 Hood The hood should meet the following requirements. a) The hood and breathing hose should be firmly connected, and the hood design should be easy to remove. In practical performance tests, the hood should remain stable on the head Stable (use headband if necessary) and comfortable. b) The window of the hood should be firmly combined with the hood material. In the practical performance test, the window should ensure that the field of view is not distorted and the field of view is not affected To the effect, fogging of the window should not seriously damage the vision of the hood. When the surface of the window is sprayed with anti-fog material, the material should His performance has no effect, and it is non-irritating to the skin and harmless to health. c) The impact resistance of the window should be tested according to the method specified in 6.13 of GB 2626-2006 to ensure that the window has no impact after impact. Breakdown and no cracking. After the test, the leakage rate test shall be performed in accordance with the requirements of 5.3.5. d) Tested in accordance with GB/T 12586-2003 Method B. The sample of the hood material (excluding the window and neck seal) has been flexed 5000 times. There should be no visible damage after scratching. e) Tested in accordance with GB/T 529-2008 Method B (using a right-angled specimen with a notch), the hood material (excluding the window and neck seals) Sealing ring) The tear strength of the sample is not less than 20N. f) According to the method of 6.13, the joint strength of the hood material should not be less than 30N. g) On the premise of ensuring that the protective performance and use performance meet the requirements, the hood can include a water blocking hood and an exhalation valve to increase the Comfort. 5.4.1.2 Full face mask Full face masks should meet the following requirements. a) The full-face tight-fitting frame should closely fit the contours of the human face without obvious tenderness; the full-face fixing system should have sufficient strength And elastic, and should be adjustable according to the needs of the wearer. The combined strength of the fixing system and the full face mask should not be less than 50N. test In accordance with the provisions of 6.2, 6.12 and 6.13. b) According to the method of 6.8 in GB 2890-2009, the full-face mask should have a wide field of vision, and the vision should be true without distortion. Total visual field retention is not small At 70%, the binocular visual field retention rate is not less than 55%, and the lower visual field is not less than 35 °. c) Tested in accordance with the method of GB/T 16556-2007 Appendix B, the full-face lens should be able to withstand a speed of 44.2m/s and a diameter of 3mm The impact of the steel ball should be no visible cracks or broken after the test. d) According to the method in GB/T 2410, the light transmittance of the full-face lens should not be less than 85%. 5.4.2 Air supply valve Check in accordance with 6.2, the air supply valve should have an active positive pressure mechanism. Note. Only full-face respirators contain this part. 5.4.3 Connections The connection should meet the following requirements. a) In accordance with the methods of 6.2 inspection and 6.12 test, the connection parts of the respirator should be easy to remove in order to facilitate cleaning, inspection and testing. All removable connectors shall be easily connected and tightened by hand after removal. Disconnects during normal use and maintenance When used, the seals used should not fall off or shift. b) Checked in accordance with 6.2 and 6.12, the distortion of the breathing tube of the respirator should not affect the installation of the connector or the performance of the respirator Can, or cause detachment of the breathing tube. The structure of the connection should prevent accidental interruption of the air supply. c) Tested in accordance with 6.13.The strength of the combination Not less than 250N. The bonding strength between the breathing tube and the hood should be not less than 50N. d) Check in accordance with 6.2. The high, medium and low voltage connections shall not be interchangeable. 5.4.4 Respiratory catheter The breathing tube should meet the following requirements. a) According to the test of 6.14, the air flow reduction should not be greater than 10% under the pressure of the breathing tube. After 5 minutes of pressure relief, Check according to 6.2, the breathing catheter should be free of air leakage and deformation. b) Tested in accordance with 6.12, the breathing tube should not obstruct the free movement of the wearer's head and not interfere with its connection to the mask. In accordance with GB/T 23465-2009. 5.4.5 Pressure reducer Check in accordance with 6.2, the respirator should be equipped with a pressure reducer to ensure that downstream components can withstand the pressure after decompression. When downstream components cannot support When receiving the full pressure of the pressure reducer, a pressure relief valve should be provided. When setting a pressure relief valve, the pressure relief valve should meet the following requirements. a) Tested according to the method of 6.15.1, the pressure relief valve of the pressure reducer should be able to pass 400L/min when the input pressure does not exceed 3MPa. Airflow; b) Tested in accordance with 6.15.2. After the pressure relief valve of the pressure reducer is activated, the inhalation resistance and exhalation resistance should not be greater than 2.5kPa. 5.4.6 High-voltage components Check in accordance with 6.2.Metal high-pressure pipes, valves and connections shall be able to withstand 1.5 times the rated working pressure of gas cylinders. 2 times the rated working pressure of the gas cylinder. 5.4.7 Pressure indicator Check in accordance with method 6.2 and test in method 6.12.The pressure indicator shall meet the following requirements. a) The respirator should be equipped with a reliable pressure indicator that can indicate the maximum inflation pressure of the cylinder; b) The range of the pressure indicator should be at least 5 MPa greater than the maximum inflation pressure of the cylinder; the reading of the pressure indicator should be the same as that of the cylinder val......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 38451-2019_English be delivered?Answer: Upon your order, we will start to translate GB 38451-2019_English as soon as possible, and keep you informed of the progress. 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