Supplied Air Respiratory Protection | Are you in the wrong place?


Release time:

2023-04-04

Thick smoke, steam, harmful gas leakage and accidents in anoxic environment seriously endanger human respiratory health and life. In order to escape, self-rescue and emergency rescue, positive pressure air respirators came into being. It brings hope to mankind in disasters and protects the lives of rescuers. It has been widely used in fire protection, chemical industry, shipping, petroleum, smelting, warehouses, laboratories, mines and other departments as a rescue guarantee. However, there are still many misunderstandings in the use of positive pressure air respirators. Gaoma Safety Xiaobian has prepared the following questions. Let’s answer the self-test first:

Thick smoke, steam, harmful gas leakage and accidents in hypoxic environment seriously endanger human respiratory health and life. It brings hope to mankind in disasters and protects the lives of rescuers. It has been widely used in fire protection, chemical industry, shipping, petroleum, smelting, warehouses, laboratories, mines and other departments as a rescue guarantee. However, there are still many misunderstandings in the use of positive pressure air respirators. Gaoma Safety Xiaobian has prepared the following questions. Let’s answer the self-test first:

What You Think: Positive pressure air respirators represent the level of protection and are suitable for all hazardous situations.

Not exactly.

Among all respiratory protection products, the positive pressure air respirator (SCBA) is a kind of respiratory protection equipment with its own air source, and it is the respiratory equipment with the highest protection level in the respiratory system. However, it is not omnipotent No, there will be occasions where air calls cannot be protected alone:

When encountering pollutants that can be absorbed through the skin, it is necessary to cooperate with chemical protective clothing for operations;
When the air is exhausted, when the respirator alarm whistle sounds, the user must evacuate from the dangerous environment;
The operating temperature range of the positive pressure air respirator is -30°C~70°C, and it needs to be used together with equipment such as fire-proof and heat-insulating clothing in an ultra-high temperature environment;
When there is radiation pollution in the environment, it must be used together with protective products that can isolate radiation.

What You Think: A positive pressure respirator requires only a quick check of the seal and cylinder supply before use.

Not exactly.

In fact, there are more than one inspection items for positive pressure air respirators before use. Contains:
The appearance of the positive pressure air respirator is not damaged, and check whether the label is within the valid period of use;
Open the valve of the gas cylinder to fill the pipeline with air, and check whether the pressure of the gas cylinder is greater than 27MPa after the pressure gauge is stable;
Check all connections for air leaks. Close the gas cylinder valve, observe the pressure gauge for 1 minute, and the indication value should not drop by more than 2Mpa;
Check the seal of the mask to the face. Put on a mask to block the interface and inhale and keep it for 5s, no air leakage;
Check air supply valve performance. Connect the air supply valve to the mask, breathe 8 to 12 times at a time, and breathe smoothly;
Check the alarm. Observe that the alarm sounds when the pressure gauge value is between 5Mpa and 6Mpa.

What You Think: Positive pressure air breathing apparatus require no maintenance and maintenance.

No.

Positive pressure air respirator is an important protective equipment, which is related to the health and even life of the user.
Spare respirators must be inspected weekly, or at a frequency that ensures the respirators are functioning properly when required. The pressure gauge should be calibrated and inspected once a year, and the high-pressure gas cylinder and gas cylinder valve should be re-inspected every three years. At least annually, the respirator shall be visually inspected and performance tested by authorized personnel. However, when the frequency of use is high or the conditions of use are harsh, the time interval for regular testing should be shortened. The gas cylinders used with respirators must pass the regular inspection and evaluation conducted by the inspection agency authorized by the Bureau of Quality and Technical Supervision.
Regular maintenance can ensure that the air exhaler will not be fatally threatened by pipeline leakage, mask air leakage and other reasons during use. Regular cleaning and hygiene can ensure the health of users. Therefore, the air respirator must be regularly maintained and maintained in accordance with the instructions or the manufacturer's instructions.
Warning: In the process of cleaning and disinfecting the respirator, do not let water seep into the medium-pressure airway and alarm device, otherwise it will easily cause equipment failure, affect the service life of the respirator, and may even cause hidden dangers.