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.

Risk factors of confined space operation

Generally, workplaces in limited spaces contain various gases such as hydrogen sulfide, carbon monoxide, carbon dioxide, ammonia, methane (biogas), hydrogen cyanide, etc., among which asphyxiating gases such as hydrogen sulfide and carbon monoxide are particularly prominent. Common confined space operations include: cleaning mud pools, sedimentation tanks, brewing pools, septic tanks, sewers, septic tanks, cellars, etc.

When working in these places with limited space, poor ventilation and high concentration of asphyxiating gas will lead to the decrease of oxygen content in the air. When the oxygen content in the air drops below 16%, people will suffer from hypoxia. When the oxygen content drops below 10%, people will have different degrees of consciousness disorder or even death. When the oxygen content drops below 6%, sudden death may occur.

Refer to the above? Baidu Encyclopedia-Five Rules of Safe Operation in Limited Space

Refer to the above? Baidu encyclopedia-limited space allocation