1. Scope
This regulation specifies operation items and maintenance methods for welding equipment. It applies to the operation and maintenance of all welding equipment.
2. General Provisions for Arc Welding
- Before starting work, conduct a safety inspection of welding equipment. Electrical equipment and installations must comply with electrical installation standards. Protective enclosures must be complete and secure. Protective covers at primary and secondary terminals must be firmly installed.
- Welding machines used on-site must be provided with rain-proof, moisture-proof, and sun-proof sheds.
- For high-altitude welding and cutting, safety belts must be worn. Fire prevention measures must be taken around and below the weldment, with a dedicated supervisor.
- When welding cables cross roads, they must be elevated or inserted into protective pipes. When crossing tracks, they must pass under the tracks.
- Ground wires and handle wires must not be placed on flammable, explosive, or heat-source items. Ground wires must not be connected to pipelines, machine tools, building metal structures, or tracks. Ground resistance must not exceed 4Ω.
- Do not weld outdoors in rainy weather. When working in damp areas, operators must wear insulating shoes.
- For welding machines out of service for a long time, insulation resistance must not be lower than 0.5MΩ when reused. Wiring parts must not show corrosion or moisture.
- During loaded operation, welding personnel should frequently check the temperature rise of the welding machine. If it exceeds Class A 60°C or Class B 80°C, stop operation and cool down.
- Within 10m of the welding site, do not stack oxygen cylinders, acetylene generators, wood, or other flammable materials.
- After work, clean the site, cut off power, and lock the electrical control box.
3. AC Welding Machine
- Pay attention to primary and secondary wires; do not connect them incorrectly. Input voltage must comply with the welding machine nameplate. Strictly prohibit touching live parts of primary circuits.
- Secondary tap connection copper plates must be pressed tightly; terminals should have washers. Before closing the switch, thoroughly check for loose or damaged nuts, bolts, and other components.
- When moving the welding machine, cut off power. Do not drag cables to move the machine. If power fails during welding, cut off power immediately.
