First, preparation before entering the anoxic confined space:

Before starting operation in anoxic environment, all respiratory protective equipment and rescue equipment must be checked to ensure that the equipment can be used effectively. The concentration of harmful gas must be determined before operation, and the operation can only be carried out after the air quality reaches the standard. If welding operation is carried out in a confined space, the workplace must be ventilated, or isolation breathing protection equipment must be used.

Two, the five provisions of the limited space safety operation:

1, the work approval system must be strictly implemented, and it is strictly forbidden to enter the limited space without authorization.

2. "Ventilation first, then inspection, then operation" must be achieved, and ventilation and unqualified operation are strictly prohibited.

3, must be equipped with personal protective equipment such as poisoning suffocation, set up safety warning signs, it is strictly prohibited to work without protective monitoring measures.

4, to conduct safety training for workers, it is forbidden to education and training unqualified mount guard operation.

5, emergency measures must be formulated, the scene is equipped with emergency equipment, it is forbidden to blindly rescue.

First aid measures for limited space hypoxia and classification of limited space;

First-aid measures for hypoxia and asphyxia in limited space operation?

1. First of all, quickly assess the danger and severity of the accident and inform the rescuers to get ready.

2. Use detection instruments to detect the concentration of toxic gas and oxygen content in the limited space.

3. In case of fainting or syncope, an explosion-proof fan should be used to deliver fresh air to the limited space. If toxic substances continue to leak, cut off the source of leakage.

4. If there is an explosion accident, use the nearest fire-fighting facilities or bring your own portable fire-fighting facilities to put out the fire. If combustible materials continue to leak, cut off the source of leakage.

5. If the trapped person has a seat belt and safety rope, the supervisor will quickly pull him out of the limited space.

6. If it is impossible to carry out rescue by rescue means outside the limited space, rescuers should wear necessary labor protection articles (respirator, work clothes, working cap, gloves, work shoes, safety rope, etc.). ) and fasten your seat belt to prevent rescuers from being hurt.

Second, the limited space classification:

1. sealing equipment: such as cabins, storage tanks, shipboard tanks, reaction towers, freezers, pressure vessels, pipelines, flues, boilers, etc.

2. Limited underground space: such as underground pipelines, basements, underground warehouses, underground projects, underground ditches, tunnels, culverts, pits, abandoned wells, cellars, sewage pools, biogas digesters, septic tanks, sewers, etc.

3. Limited space on the ground: such as storage room, distiller's grains pool, fermentation pool, garbage station, greenhouse, cold storage, granary and silo.