1. in case of thunderstorm, outdoor welding shall be stopped.

2. thorium tungsten electrode shall be placed in a sealed lead box. When grinding thorium tungsten electrode, gloves and masks must be worn, and dust shall be removed in time.

3. it is strictly prohibited to weld on vessels or pipes with pressure, and cut off the power supply before welding live equipment.

4. containers or pipes that have been stored with inflammable, explosive and toxic substances must be cleaned.And open all orifices.

5. when multiple welding machines are welded together, Guiyang steel structure installation welding platform or weldment must be grounded.And there shall be light isolating plate.

6. when welding must be carried out in the diffusion area of inflammable gas or liquid, it shall be approved by relevant departments.Before welding.

7. the handle wire and ground wire shall not be in contact with the wire rope, let alone the wire rope or mechanical and electrical equipment to replace the zero line.All ground connections must be firmly connected.

8. when changing the rotating handle wire at the site, cut off the power supply and do not hold the handle wire ladder to climb the height.

9. when removing welding slag and using arc gouging to remove the root, wear protective glasses or masks to prevent iron slag splashing from hurting people.

10. when welding in a closed metal container, the container must be reliably grounded, well ventilated and supervised.Do not enter oxygen into the container.

11. the welding tongs and handle wires must be well insulated.The connection shall be firm, and gloves shall be worn when replacing the welding rod.When working in damp place, stand on insulating rubber plate or board.

12. the upper shell of carbon dioxide gas preheater shall be insulated and the terminal voltage shall not be greater than 36 v.

13. the welding machine shall be equipped with a separate switch.The switch shall be placed in the rain proof gate box and shall be operated laterally with gloves when pulling and closing.

14. flammable and explosive materials shall be cleared around the welding site, or covered and isolated.

15. when installing and welding preheating workpieces for steel structure, heat insulation measures such as asbestos cloth or baffle plate shall be taken.