1. All welders who perform welding must hold the certificate of passing the examination or the certificate of employment issued by the unit designated by the owner.
2. All welders who perform welding must hold the welder examination certificate issued by the national labor department.
3. The welding method, welding position, and validity period of the welder should be consistent with the qualification certificate of my own examination.
4. Qualified welders should be registered with the number, and the welding qualification should be confirmed by the supervising engineer.
5. Familiar with the applicable "Jinliwen Gas Pipeline Engineering Pipeline Engineering Welding Procedures" and "Welding Operation Instructions.
6. Observe the welding process discipline.
