GB 6220-1986 Long tube mask

This standard is applicable to long-tube masks used in production workplaces to prevent inhalation of harmful gases, vapors, dust, smoke, mist and to compensate for the hazards of hypoxia. GB 6220-1986 Long-tube masks GB6220-1986 standard download decompression password: www.bzxz.net

Scope of application
National Standard of the People's Republic of China
Long tube mask
Long tube respirators
UDC614.894
GB 6220-86
The standard is applicable to long-arm masks (hereinafter referred to as masks) used in production workplaces to protect against inhalation of harmful gases, vapors, dust, smoke, mist (hereinafter referred to as harmful pollutants) and to compensate for the hazards of hypoxia. 2 Definition of terms
2.1 Long tube mask
Long tube mask is a personal protective equipment that isolates the wearer's respirator from the surrounding atmosphere and uses lung force or mechanical force to introduce clean air for breathing through the airway.
2.2 Hypoxic environment
Hypoxic environment is an environment where the volume concentration of oxygen in the air is less than 18%. 2.3 Mask
Mask is a general term for close-fitting masks (such as the masks in GB2890-82 "Filter-type anti-bag mask", etc.), open masks, and air supply hoods.
2.4 Air supply valve
Air supply valve is a general term for the air flow regulator used for on-demand air supply and compound air supply masks. 3 Types and specifications
The types and specifications of masks are shown in Table 1.
Mask type
Self-priming type
Blower type
Built-in air supply type
On-demand air supply type
Compound air supply type
Published by the National Bureau of Standards on April 9, 1986
Mask type
Closed source cover
Closed interruption cover
Open moisture cover
Air supply hood
Closed mask
Open mask
Air supply wing
Closed mask
Closed research cover
Connecting duct, hose (inner diameter up to 18mm, length less than 1m)
Connecting duct, hose, Flow regulator, electric or manual blower
Connecting duct, medium-pressure soft, filter, flow regulator, air source (compressed air, high-pressure bottle air)
Connecting guide, medium-pressure hose, filter, air supply valve, air source (compressed air, high-pressure bottle air), small high-pressure air bottle and reduced pressure air supply system 198812-01 implementation
GB6220--86
See Figure 1 for self-priming masks, Figure 2 for blower masks, Figure 3 for quantitative air supply masks, Figure 4 for on-demand air supply masks, Figure 5 for compound air supply masks, and Figure 6 for face masks. Figure 1
1 Phase Luo: 2 connecting duct: 3-circuit fixed arm, 4-soft alarm, 5-filter, 6 bracket Figure 2
1 face palm, 2 way duct, 3-tightening belt, 4-flow regulator 5 soft arm, 6 fan 8
G6220-86
1 air supply hood, 2 connecting duct, 3 flow drum regulator, 4 fixed belts, 5 medium pressure hose, 6-superheater 1 air compressor
High pressure bottle air
1 side wing, 2 air supply valve, 3 connecting duct, 4 face fixed belt , 5-ball pressure hose compressed air
GB6220-86
Air compressor
1High-pressure bottle air
Compressed air
1-face mask, 2-connecting duct; 3-air supply valve; 4-pressure reducing valve, 5-check valve; 6-hose connector, 7-high-pressure device,
8-fixing belt; 9-small high-pressure air bottle; 10-pressure indicator, 11-medium-pressure hose for mmm
a: Close-fitting half mask
b. Close-fitting full-face mask (single-eye type)
Figure 6 Mask types
c. Tight-fitting full-face mask (bi-eye type)
d, air supply hood
Thai structural and performance requirements
GB 6220---86
e, open-type mask
Continued Figure 6
The mask must be safe and reliable, suitable for use and storage at 30-45℃. .1 Mask
f Air supply hood (one-piece type)
The eye window of the mask must be made of colorless and transparent material, with a light transmittance greater than 85%, and a true view of objects. There should be a light-proof facility, and the fixing system should have sufficient elasticity and strength, and the piano parts should be easily interchangeable. 4.1.1 Tight-fitting mask
The tight-fitting mask selected according to regulations should fit well with the face or head of the human body, without obvious tenderness. a. The leakage rate of the tight-fitting mask
shall be tested in accordance with Chapter 1 of GB6221-86 "Performance test method for long-tube masks" or GB2891.6-82 "Test method for wearing leakage coefficient of filtering bag-type masks" and shall comply with the corresponding specified values ​​in Table 2. Table 2
Leakage rate, %
Face type
GB 2891.6-82
Self-priming
Blower
Quantitative air supply
Air supply on demand
Compound air supplyWww.bzxZ.net
GB 6221-86 Chapter 1
GB 6220--86
The actual harmful space and field of view of tight-fitting masks shall be tested in accordance with GB2891.4-82 "Test method for field of view of filtering gas masks" and GB2891.5-82 "Test method for actual harmful space of filtering gas masks", and shall comply with the requirements of Table 3. Table 3
Actual harmful space, 1
Total visual field, %
Binocular visual field, %》
Lower visual field, degree>
Monocular
Full-face mask
Binocular
Half-face mask
Note: When a mask is installed inside a full-face mask, the actual harmful space should be less than 170ml. For masks with quantitative air supply and blower-type face wings, the actual harmful space can be increased by 20%.
C. Air tightness and resistance of the air valve of the close-fitting mask The exhalation valve should be equipped with a protective device, with good air tightness and a closed state when the internal and external pressures are balanced. According to GB2891.1--82 "Test method for air tightness of exhalation valves of filtering gas masks", when the pressure is reduced to -1176Pa (-120mmH,O), the negative pressure value of the exhalation valve for the full mask shall not drop by more than 588Pa (60mmHO) within 45s, and the time for the exhalation valve for the half mask to return to normal pressure shall be more than 20s. According to GB2891.2-82 "Test method for air flow resistance of exhalation valves of filtering gas masks", the resistance of the exhalation valve shall comply with the requirements of Table 4.
Resistance of exhalation valve for full mask
98.0 (10.0)
4.1.2 Open mask
Exhalation valve force for half mask
<49.0 (5.0)
Pa(mmH,O)
It can cover eyes, wings and mouth, and does not affect the movement of head and body. A diversion device is set at the air inlet, and there is no exhalation valve. The leakage rate of the open mask should be less than 1.0% according to the test of Chapter 1 of GB6221-86. 4.1.3 Air supply hood
It can cover the head, eyes, neck and neck (can be used with protective clothing), and does not affect the movement of head and body. A diversion device is set at the air inlet, and an exhalation valve is set, which is a close-fitting type. : The leakage rate of the air supply hood should be less than 1.0% according to the test of Chapter 1 of GB6221-86. ． The structure and performance requirements of the exhalation valve are the same as those of the exhalation valve for half masks in 4.1.1. 4.2 Ventilation resistance of the mask
The ventilation resistance of the mask shall be tested in accordance with Chapter 2 of GB622186 and shall comply with the requirements of Table 5. 64
Ventilation flow
Inspiratory force
Expiratory resistance
(20.0) (60.0)
(10.0)(30.0)
4.3 Air tightness of low-pressure part of mask
GE 6220-86
Blower
(10.0) (50.0)
Volume air supply
Air on demand
(25.0)(70.0)
(10.0)(60.0)
The air tightness of the low-pressure part of the mask shall be tested in accordance with Chapter 3 of GB6221-86, and no air leakage is required. Pa(mmHzO)
Compound air supply type
The low-pressure parts of each mask are as follows: self-priming mask refers to the air inlet at the end of the hose to the mask, blower mask and quantitative air supply mask refer to the hose connection port of the flow regulator to the mask, on-demand air supply mask and compound air supply mask refer to the outlet of the air supply valve to the mask.
4.4 Air supply valve performance
4, 4.1 The air supply valve should be airtight and safe within the specified air pressure range. The air supply valve for the on-demand air supply mask should be able to open quickly when inhaling, and close quickly when stopping inhaling or releasing air. The air supply valve for the compound air supply mask should be able to move sensitively within the use pressure. 4.4.2 According to the test of Chapter 4 of GB6221-86, the action pressure shall comply with the provisions of Table 6. Table 6
Air supply foot of air-on-demand mask
Air flow
4.5 Connecting duct, hose and medium-pressure hose
4.5.1 Connecting duct
Pa(mmH,O)
The air supply valve of composite air supply mask
should have strong elasticity and pressure resistance, and can be ventilated smoothly when bent into various shapes: b.
The length should not hinder the free movement of the head; b.
The bonding strength of the connecting duct mask should be greater than 147N (15Kgf). The connection between the mask and the airway of the open mask should be firm and reliable. 4.5.2 Hose and medium-pressure hose
According to the test of Chapter 5 of GB6221-86, it should comply with the following provisions. 150
, pressure test
, deformation test
GB 6220-86
No rupture, water leakage (gas), no local bubbling and other abnormal phenomena, no obvious deformation and ventilation
No ventilation obstruction.
C Bending test
4.5.3 The connection part of the hose or medium-pressure hose The connection part of the hose or medium-pressure hose should ensure airtightness and sufficient bonding strength. According to the test of Chapter 6 of GB6221-86, it should meet the following requirements.
Procedure. Tensile test
No separation and abnormal deformation,
b. Airtight test No leakage.
4.6 Flow regulator
Should be able to freely adjust the air flow and be strong and durable. The flow regulator for quantitative air supply masks should be able to withstand a pressure of 0.98MPa (10kg/cm2) when closed, and the ventilation flow rate should be greater than 170L/min at the maximum opening.
..7 Blower
4.7.1 According to the test in Chapter 7 of GB6221--86, the air volume at the fan outlet should be greater than 100L/min, and the air pressure should be greater than 1274Fa (130mmz0).
4.8 Filter
Can remove dust, oil mist, steam, etc. in compressed air to make the concentration lower than the value specified in T136--79 "Industrial Enterprise Design Hygiene Standard".
4.9 Fixing belt
Can firmly guide the hose or medium-pressure hose behind or to the side of the operator without affecting the operation. It should be firm and adjustable, and the joints and the connection parts with the long tube should be able to withstand a pulling force of 686.0N (70.0kNf). 4.10 The air inlet of the self-priming mask
should be equipped with a low-resistance filter device to prevent foreign matter from entering. 4.11 Air source
Introduction of air into the mask: no lack of oxygen, and the concentration of harmful pollutants is lower than the value specified in TI36--79. 5 Materials
51 The materials used for each component of the mask should be non-toxic and harmless, and the materials in contact with the face should be non-irritating to the skin. 5.2 The strength and elasticity of the material can meet the requirements of use. The metal material should be treated with anti-corrosion and suitable for hand use and storage. 5.3 The inner diameter and thickness of the hose and medium-pressure hose are uniform, without cracks and bubbles, and easy to clean multiple times. 5.4 The mask material should be able to withstand multiple cleaning and disinfection. 6 Others
6.1 Inspection
6.1.1 The manufacturer is responsible for the quality of the product. The product shall be inspected and qualified in accordance with the provisions of this standard before leaving the factory, and an instruction section shall be attached. 6.1.2 Long-tube masks should be inspected and certified by authorized technical units according to this standard before they can be produced and sold. Products should be inspected regularly.
6.2 Marking
Mask packaging should be strong and light, and have the following markings. Mask types, differences and uses of masks,
Manufacturer name, year and month of manufacture and batch number,
Instructions for use and storage.
GB622086
Additional notes:
This standard was proposed by the Ministry of Labor and Personnel of the People's Republic of China. This standard was drafted by the Beijing Institute of Labor Protection Science. The main drafters of this standard are Cheng Xingren, Jiao Qin, Zhang Xueli and Sun Bin. 67
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