What safety measures need to be prepared before entering a confined space to ensure the safety of personnel?

Before entering a confined space, the following safety measures need to be prepared to ensure the safety of personnel:

1. Assess the risk: first carry out a risk assessment to understand the possible hazardous factors in the confined space, such as harmful gases, lack of oxygen and high temperature.

2. Formulation of program: Formulate a detailed operation program based on the risk assessment, including operation time, division of labor among personnel, and emergency plan.

3. Ventilation: Before entering the confined space, adequate ventilation should be carried out to reduce the concentration of harmful gases.

4. Wear protective equipment: According to the assessment results, choose appropriate personal protective equipment, such as gas masks, positive pressure air respirators, protective clothing, etc.

5. Carry detection instruments: Carry portable gas detectors to monitor the concentration of harmful gases in the air in real time.

6. Set up guardians: Assign at least one trained guardian to monitor the safety of the operating personnel.

7. Keep communications open: Ensure that communication tools with the outside world are unobstructed so that external rescue forces can be contacted in time in case of emergency.

8. Conduct training and education: Provide safety training and education to operators to familiarize them with hazard characteristics, preventive measures and emergency response measures.

9. implementation of the permit system: the implementation of "into the tank operation ticket" system, without permission shall not enter the confined space for operations.

10. Develop an emergency plan: develop a specific emergency plan, including emergency rescue procedures, rescue personnel duties.

The above is to enter the confined space before the need to do a good job in preparing safety measures to ensure the safety of personnel. In practice, it is also necessary to adjust and improve according to the specific circumstances to ensure the safety and effectiveness of the operation.